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ContentsThe Generator Set and Electrical Distribution 31.1. The 2 applications 41.1.1. Replacement energy 41.1.2. Energy production 61.2. Quality Energy 81.3. Services to be provided 10The Generator Set application in LV 122.1. Choice of HV or LV system 122.2. Transfer device 132.2.1. Layout of feeders 132.2.2. Sequence 14Protection and Monitoring of a LV Generator Set 163.1. Generator protection 153.1.1. Overload protection 163.1.2. Short-circuit current protection 163.2. Downstream LV network protection 183.2.1. Priority circuit protection 193.2.2. Safety of persons 193.3. The monitoring functions 193.3.1. Capacitor banks 203.3.2. Motor restart and re-acceleration 203.3.3. Non-linear loads - Example of a UPS 213.4. Generator Set parallel connection 253.4.1. Parallel operation 253.4.2. Grounding a parallel-connected Generator Set 263.5. The installation standards 273.5.1. Power definition 273.5.2. Safety standard requirements 27The Schneider protection solution 294 .1. Micrologic and generator protection 294.1.1. Long Time Delay protection of the “Inverse Definite MinimumTime Lag” type of phases (3) 294.1.2. Generator protection 304.2. Micrologic P & H for generator monitoring 314.2.1. Implementation 314.2.2. The monitoring functions 314.3. Micrologic for insulation fault protection 384.3.1. The ground protection 384.3.2. Residual current device (RCD) protection 39Summary 405.1. Diagram 405.2. Comments 415.3. Summary 42"Additional technical informations" chapter 431

In shortGenerator Sets (GS) are used in HVand LV electrical distribution.In LV they are used as:b replacement sourceb safety sourceb sometimes as a ProductionSource.When the need for Energy Quality isessential, the Generator Set isassociated with an UninterruptiblePower Supply (UPS).The Generator Set andElectrical DistributionUsers’ LV electrical distribution is normally supplied by an electrical utility bymeans of HV/MV and MV/LV voltage transformers.To ensure better continuity of the electricity supply, the user can implement adirect supply from an independent thermal source (Generator Set or GS) as aReplacement source. On isolated sites or for economic reasons, he can use thisenergy source as the Main source.This Generator Set mainly consists of:b a thermal motorb a generator converting this mechanical energy into electrical energyb an electrical cubicle performing the excitation regulation and control/monitoringfunctions of the various Generator Set components (thermal and electrical).Generator Set installation must conform to installation rules and satisfy the safetyregulations applicable to the premises on which they are installed or to theequipment that they are intended to supply.The Protection Plan and Monitoringof downstream LV distribution mustbe defined specifically taking thegenerator characteristics intoaccount.3

The Generator Set andElectrical Distribution1.1.The 2 applicationsAccording to the application - Main electrical power supply source (ProductionSet) or Replacement source of the Main source - the sizing characteristics of theGenerator Sets vary (power, output voltage, MV or LV generator, etc.).1.1.1. Replacement energyPrincipleAs a Replacement source, the Generator Set operates only should the mainssupply fail.Mains failure can be due to:b a random cause: fault on the networkb a voluntary cause: placing the network out of operation for maintenancepurposes.OperationIn the Replacement source function, the Generator Set supplies the loads via asource changeover switch.As operation is exceptional, the Generator Set is sized strictly to supply thepower P required. The power of these Generator Sets is rarely greater than anMVA. The power of the Replacement source LV Generator Sets ranges typicallyfrom 250 to 800 kVA.E79478EMVMainsourceNCLVNOGSReplacementsourceNC: normally closed.NO: normally open.Figure 1: Replacement source GS.4

ImplementationThe Generator Sets normally operate independently without connection to themains supply, but can be connected if necessary (parallel-connected GeneratorSet) in the case of high power requirements.E79354EMVMVGSGSLVLVNCNCNCNC: normally closed.NO: normally open.Figure 2: Block diagram of a high power LV replacement GS.5

The Generator Set andElectrical Distribution1.1.2. Energy productionPrincipleThe Generator Set operates in the “Main” operating mode: it must be able towithstand operating overloads:b one hour overloadb one hour overload every 12 hours (Prime Power)For example: independent energy production for a cement works.OperationPowers are normally high or very high (up to several tens of MVA).Note 1: The production source Set can be LV - if it is low or medium power - anddirectly supply a LV/MV step-up transformer. In this case, we can consider thatthe Generator Set management functions, excluding generator protection, are atMV level (Generator Set + MV/LV transformer global function).E79352EHVNCLVGSHVbusbarLVNC: normally closed.NO: normally open.Figure 3: Block diagram of a LV production GS with step-up transformer.6

Note 2: If there is an MV Set in Production, it may be useful to have one or moreReplacement Sets in LV according to network typology (maintenance of network,Production Set, MV fault, etc.) (maintenance du réseau, du Groupe deProduction, défaut HTA, ...).E79355EMV production setLV replacement setGSGSGSNCLVNCLVNCNC: normally closed.NO: normally open.Figure 4: Block diagram of an MV production GS with LV replacement GS.64060si7

In shortReplacement Set or Safety Set.The same functions are required:ensure continuity of the electricalsupply should the main source fail.However, a Safety Set must satisfyfar more exacting operatingrequirements in order to guaranteesafety of the electrical installation atall costs.The Generator Set andElectrical Distribution1.2.Quality EnergyTo supply sensitive loads (computer, etc.), a quality energy must be implementedthat is free from breaking and with a perfectly regulated voltage.A number of systems can be used to ensure break-free switching. Thesesystems are implemented in the LV system:b reversible synchronous machinethe Set generator is permanently connected to the mains supply:v when operating in the Main function, it operates as a synchronous motor drivingits inertia flywheelv when operating in the Replacement function. When the Mains supply fails, thesynchronous machine, driven by its flywheel, starts to operate as a generator.The Set’s thermal motor starts (off-load) and automatically connects as soon as itreaches its speed at the generator.When the Main source is restored, the Set is then synchronised on the Mainsource, the Main source circuit-breaker closes and the thermal motor isdisengaged and stopped.E79357EElectrical utility networkSNmainsourceSynchronousmachine(compensatoror generator)MagneticcouplingFlywheelThermalmotorNCNCNon-backed upfeedersBacked upfeedersNC: normally closed.NO: normally open.Figure 5: Block diagram of a reversible synchronous machine.This type of solution is not very common as it is relatively expensive toimplement.b generator Set associated with a UPSthe generator set ensures continuity of the electrical supply. Electrical supplyinvolves breaking (from a few minutes to a few seconds). Energy Quality(elimination of outages/brownouts and waveform) is obtained by anUninterruptible Power Supply (UPS) - equipped with a battery- which continuallysupplies sensitive loads in LV.This type of solution is advantageous as it provides sensitive loads with qualityenergy during use on a Main or Replacement source.8

E79360EElectrical utilityHV incomerNCMains 1feederMains 2feederNon-sensitiveloadUninterruptiblepower supplySensitive feedersNC: normally closed.NO: normally open.Figure 6: Replacement GS and UPS.Note: for very sensitive applications, should the UPS stop, the operator can asknot to be switched to the MS in operation on Generator Set. In this case the MS isreplaced by a redundant UPS.This system is naturally compulsory if frequency of the upstream (source) anddownstream (application) networks is different (for example source in 50 Hz,application in 60 Hz).9

The Generator Set andElectrical Distribution1.3.Services to be providedAccording to the choice of customer or the type of risk anticipated, the GeneratorSet is defined in priority as:Safety Source onlyA separate Set manages the Replacement Source function. Safety regulations,mainly concerning buildings open to the general public such as hospitals, publicbuildings, etc. define in detail electrical distribution for safety equipment(emergency lighting, fume extraction, etc.).These regulations aim at:b providing fire protection (defective main source, supply of extinguishing means)b evacuating people in the best possible conditions (emergency lighting,evacuation path, elevator supply, etc.).The Safety Set only supplies the loads necessary for the Safety function.E79361EElectrical safety supplySafetysourceGSReplacementsourceMainsourceNCNCNCSafetyswitchboardMain safetyswitchboardSafetyMainNCSemi-lighting1Fumes extraction, elevator,water supply, telecommunication,other specific equipmentSemi-lighting2OtherinstallationSafetyMain or replacementNC: normally closed.NO: normally open.Figure 7: Block diagram of an installation with a replacement GS and a safety GS.Note: the various switches can be replaced by circuit-breakers if required bytheir need for protection.10

Replacement SourceThe Set’s purpose is to perform process controlled shutdown correctly. The“energy quality” function, if necessary, is taken into account thanks to supplyingof sensitive loads via an Uninterruptible Power Supply (UPS) downstream fromthe Set.The Set can be specifically dedicated to the Replacement source function, but itis allowed to operate as a Safety source if the specific Safety functionrequirements are fully satisfied: for example maximum time of 10 s to obtainvoltage and frequency.This allows more frequent operation of these Sets and thus allows them to bemore operational if necessary.Autonomous Production SourceAs a rule the set is implemented:b to supply electrical power at lesser cost (isolated site)b to guard against serious long-term energy downtime risks (areas with seismicrisks, etc.).11

In shortA LV Generator Set normally has apower of less than 2 500 kVA: thetypical value is around 800 kVA.The LV Generator Set is mainlyused as a replacement and/orsafety source. The main source isswitched to the replacement source:b with load-shedding of non-priorityloadsb by means of an automatic sourcechangeover switch controlled byvoltage.The Generator SetApplication in LV2.1. Choice of HV or LV systemSupply voltage is chosen mainly with respect to Generator Set powerrequirements.Generator Set as HV sourceThe Generator Set is normally a generator activated by a diesel motor or a gasturbine.The production Set application, requiring high installed powers, is thus normallycarried out using the MV system.Generator Set as LV sourceThe Generator Set is normally a generator activated by a diesel motor.The following table summarises the system choice criteria:criteria LV HV commentspower < 2500 kVA > 2500 kVAfacility +++ +regulations ++LV Generator Set applicationsLV Generator Sets are mainly used:b to supply safety equipmentb to replace the Main sourceb to supply temporary installationsThe sectors of activity where it is necessary to have a Replacement and/orSafety source, are very vast ranging from Tertiary to Industry.The following table lists the main application sectors:tertiaryhospitalscomputer Centre (bank, etc.)public buildingindustrialprocess,cement works (furnacemotor), …12

2.2. Transfer deviceIt is interesting to make the source transfer (or source switching) device usingstandard switchgear, adding specific features. Thus the devices will be:b withdrawable for easier maintenanceb electrically and mechanically lockedFor implementation, the distribution architecture and transfer sequence must bestudied.2.2.1. Layout of feedersAs a rule it is not necessary to back up the entire installation. An economicmeasure is to size the Generator Set for supply of the priority feeders only.For example: sizing the Generator Set at 700 kW for a LV distribution of 2000 kVA(only one third of feeders are considered priority).Transfer of load supply to the replacement source can be considered in 2 ways.Transfer with load-shedding of non-priority loadsPriority and non-priority loads are not specifically grouped: management (loadshedding)of loads must be performed by a dedicated automation device or relay.This configuration type requires a management auxiliary but is easier to modify orupgrade.E79353EMVLVMain LV boardNCGSLoadsheddingNon-priorityPriorityNC: normally closed.NO: normally open.Figure 8: Management of priorities by load-shedding.13

The Generator SetApplication in LVTransfer for priority feeders onlyPriority feeders are directly grouped at a specific busbar in this system. Thissystem requires no management auxiliaries.E79356ESource 1MVGSLVNCD1NCMain/StandbyNOD2Non-priority circuitsPriority circuitsNC: normally closed.NO: normally open.Figure 9: Management of priorities by grouping.14

2.2.2. SequenceMain source / Generator Set transferTransfer generally takes place with a short break (a few seconds) the timerequired to start the Generator Set and to switch over:b switching to Generator Set sequencev loss of mains voltage at TA- load-shedding of non-priority feeders (if necessary) and important feedersv after time delay starting of Generator Set at TBv on appearance of Generator Set voltage at TC- opening of Main source circuit-breakerv closing of Replacement source circuit-breaker (Generator Set) at TDv sequenced restoration of important feedersb switching to Main source sequencev restoration of mains voltage at TAv after time delay at T'B- opening of Replacement source circuit-breaker- restoration of non-priority feedersv closing of Main source circuit-breaker at T'Cv stopping of Generator Set at T'D.E88044EE88045ENon-priorityFigure 10: Block diagram.PriorityMain Replacement MainFigure 11: Type 3 chronogram.Transfer of loads on the Generator Set, the Replacement source, impliesconsideration of the generator’s specific characteristics. This takes the form of anadditional study concerning:b the protection plan (setting and discrimination)b load management (putting back into operation)b supply of sensitive and non-linear loadsIn addition, to ensure optimised operation and maintenance, it is important toimplement additional monitoring and supervision functions (frequency and voltagemonitoring, phase unbalance, etc.).Note: return to the Main source can be performed using a synchrocoupler toensure switching without voltage breaking.15

In shortA Generator Set has specificoverload and short-circuit withstandcharacteristics as a result of thehigh generator reactances.This has the followingconsequences:b for protection of people andequipment, specific circuit-breakersettings providing both protection ofthe installation set and coordinationwith the downstreamprotection devices.b for proper operation on duty of themonitoring functions preventingmalfunctions and ensuring alarmmanagement if necessary in eventof:v non-linear loads (harmonics)v loads with a high energisingcurrent (motors, LV/LV transformers,etc.)v parallel-connection of GeneratorSetsv operation in prolonged overloadconditions (Standby Set).Standards specify the specificpower available according to thetype of application of a GeneratorSet - production, transfer, standby.E79476EE79364EProtection and Monitoringof a LV Generator Set3.1. Generator protectionThe following diagram shows the electrical sizing parameters of a Generator Set.Pn, Un and In are, respectively, the power of the thermal motor, the rated voltageand the rated current of the generator.ThermalmotorFigure 12: Block diagram of a Generator Set.Nota 1: Also remember that Generator Set sizing is optimised, i.e. that Pn isnormally around one third of normal installed power.3.1.1. Overload protectionThe generator protection curve must be analysed.Figure 13: Example of an overload curve T=f(I).OverloadsStandards and requirements of applications can also stipulate specific overloadconditions:For example:I / Int1.1 > 1 h1.5 30 sThe setting possibilities of the overload protection devices (or Long TimeDelay) will closely follow these requirements.Note on overloadsb for economic reasons, the thermal motor of a Replacement Set may be strictlysized for its nominal power. If there is an active power overload, the diesel motorwill stall. The active power balance of the priority loads must take this into accountb a production Set must be able to withstand operating overloads:v one hour overloadv one hour overload every 12 hours (Prime Power).(see chapter 3.5 “The installation standards”)16

3.1.2. Short-circuit current protection3.1.2.1. Making the short-circuit currentThe short-circuit current is the sum:b of an aperiodic currentb of a damped sinusoidal current.The short-circuit current equation shows that it is made according to threephases.E79365EI rms 1subtransientconditions2transientconditions3steady stateconditionsgenerator withcompoundexcitation orover-excitationgenerator withserial exitationfaultappears10 to 20 ms0.1 to 0.3 sFigure 14: Short-circuit current level during the 3 phases.Subtransient phaseWhen a short-circuit appears at the terminals of a generator, the current is firstmade at a relatively high value of around 6 to 12 ln during the first cycle(0 to 20 milliseconds).The amplitude of the short-circuit output current is defined by three parameters:b the subtransient reactance of the generatorb the level of excitation prior to the time of the fault andb the impedance of the faulty circuit.The short-circuit impedance of the generator to be considered is the subtransientreactance expressed as a % of Uo (phase-to-neutral voltage) by themanufacturer x”d. The typical value is 10 to 15 %.We determine the subtransient short-circuit impedance of the generator:UX"d2 n x"d= where S = 3US 100NI N.Transient phaseThe transient phase is placed 100 to 500 ms after the time of the fault. Startingfrom the value of the fault current of the subtransient period, the current drops to1.5 to 2 times the current ln.The short-circuit impedance to be considered for this period is the transientreactance expressed as a % Uo by the manufacturer x'd. The typical value is 20to 30 %.Steady state phaseThe steady state occurs above 500 ms.When the fault persists, Set output voltage collapses and the exciter regulationseeks to raise this output voltage. The result is a stabilised sustained short-circuitcurrent:b if generator excitation does not increase during a short-circuit (no field overexcitation)but is maintained at the level preceding the fault, the current stabilisesat a value that is given by the synchronous reactance Xd of the generator. Thetypical value of xd is greater than 200 %. Consequently, the final current will beless than the full-load current of the generator, normally around 0.5 ln.b If the generator is equipped with maximum field excitation (field overriding) orwith compound excitation, the excitation “surge” voltage will cause the faultcurrent to increase for 10 seconds, normally to 2 to 3 times the full-load currentof the generator.T (s)17

Protection and Monitoringof a LV Generator Set3.1.2.2. Calculating the short-circuit currentManufacturers normally specify the impedance values and time constantsrequired for analysis of operation in transient or steady state conditions.Impedance table: Leroy Somer generator(kVA) 75 200 400 800 1600 2500x"d (%) 10.5 10.4 12.9 10.5 18.8 19.1x'd (%) 21 15.6 19.4 18 33.8 30.2x'd (%) 280 291 358 280 404 292Resistances are always negligible compared with reactances.The parameters for the short-circuit current study are:Value of the short-circuit current at generator terminalsShort-circuit current strength in transient conditions is:sorsU Nis the generator output phase-to-phase voltage (Main source).Note: this value can be compared with the short-circuit current at the terminalsof a transformer. Thus, for the same power, currents in event of a short-circuitclose to a generator will be 5 to 6 times weaker than those that may occur with atransformer (main source).This difference is accentuated further still by the fact that generator set power isnormally less than that of the transformer.ExampleE79474EMVGSLVNCNCMain/standbyNon-priority circuitsPriority circuitsNC: normally closed.NO: normally open.Figure 15.When the LV network is supplied by the Main source 1 of 2000 kA, the shortcircuitcurrent is 42 kA at the main LV board busbar. When the LV network issupplied by the Replacement Source 2 of 500 kVA with transient reactance of30 %, the short-circuit current is made at approx. 2.5 kA, i.e. at a value 16 timesweaker than with the Main source.18

3.2. Downstream LV network protection3.2.1. Priority circuit protectionChoice of breaking capacityThis must be systematically checked with the characteristics of the main source(HV/LV transformer).Choice and setting of the Short Time Delay releasesb subdistribution boardsthe ratings of the protection devices for the subdistribution and final distributioncircuits are always lower than Generator Set rated current. Consequently, exceptin special cases, conditions are similar to supply by the transformer.b main LV switchboardv the sizing of the main feeder protection devices is normally similar to that of theGenerator Set. Setting of the STD must allow for the short-circuit characteristic ofthe Generator Set (see 3.1.2.).v discrimination of protection devices on the priority feeders must be provided ingenerator set operation (it can even be compulsory for safety feeders).It is necessary to check proper staggering of STD setting of the protectiondevices of the main feeders with that of the subdistribution protection devicesdownstream (normally set for distribution circuits at 10 ln).Note: when operating on the Generator Set, use of a low sensitivity RCDenables management of the insulation fault and ensures very simplediscrimination.3.2.2. Safety of peopleIn the IT (2 nd fault) and TN grounding systems, protection of people againstindirect contacts is provided by the STD protection of circuit-breakers. Theiroperation on a fault must be ensured, whether the installation is supplied by theMain source (Transformer) or by the Replacement source (Generator Set).Calculating the insulation fault currentZero-sequence reactance formulated as a % of Uo by the manufacturer x’o.The typical value is 8 %.The phase-to-neutral single-phase short-circuit current is given by:The insulation fault current in the TN system is slightly greater than the threephasefault current: for example, in event of an insulation fault on the system inthe previous example, the insulation fault current is equal to 3 kA.19

Protection and Monitoringof a LV Generator Set3.3.The monitoring functionsDue to the specific characteristics of the generator and its regulation, the properoperating parameters of the Generator Set must be monitored when specialloads are implemented.The behaviour of the generator is different from that of the transformer:b the active power it supplies is optimised for a power factor = 0.8b at less than power factor 0.8, the generator may, by increased excitation,supply part of the reactive power.3.3.1. Capacitor bankAn off-load generator connected to a capacitor bank may self-arc, consequentlyincreasing its overvoltage.The capacitor banks used for power factor regulation must therefore bedisconnected. This operation can be performed by sending the stopping setpointto the regulator (if it is connected to the system managing the source switchings)or by opening the circuit-breaker supplying the capacitors.If capacitors continue to be necessary, do not use regulation of the power factorrelay in this case (incorrect and over-slow setting).3.3.2. Motor restart and re-accelerationA generator can supply at most in transient period a current of between 3 and 5times its nominal current.A motor absorbs roughly 6 ln for 2 to 20 s during start-up.If Σ Pmotors is high, simultaneous start-up of loads generates a high pick-upcurrent that can be damaging: large voltage drop, due to the high value of theGenerator Set transient and subtransient reactances (20 % to 30 %), with a riskof:b non-starting of motorsb temperature rise linked to the prolonged starting time due to the voltage dropb tripping of the thermal protection devices.Moreover, the network and the actuators are disturbed by the voltage drop.ApplicationA generator supplies a set of motors.Generator short-circuit characteristics: P N = 130 kVA at a power factor of 0.8,ln = 150 AX’d = 20 % (for example) hence lsc = 750 A.b the Σ Pmotors is 45 kW (45 % of generator power)Calculating voltage drop at start-up:Σ Motors = 45 kW, l M = 81 A, hence a starting current ld = 480 A for 2 to 20 s.Voltage drop on the busbar for simultaneous motor starting:∆U≈UI N - I dI cc - I Nen %∆U ≈ 55 %which is not supportable for motors (failure to start).b the Σ Pmotors is 20 kW (20 % of generator power)Calculating voltage drop at start-up:Σ Motors = 20 kW, l M = 35 A, hence a starting current ld = 210 A for 2 to 20 s.Voltage drop on the busbar:∆U≈UI N - I dI cc - I Nen %∆U ≈ 10 %which is supportable but high.20

E79475EGSRemote control 2Remote control 1PrioritymotorsPriorityresistive loadsFigure 16: Restarting of priority motors (Σ P > 1/3 Pn).Restarting tips:b if the Pmax of the largest motor > 1/3 Pn, a progressive starter must beinstalled on this motorb if Σ Pmotors > 1/3 Pn, motor cascade restarting must be managed by a PLCb if Σ Pmotors < 1/3 Pn, there are no restarting problems.3.3.3. Non-linear loads - Example of a UPSNon-linear loadsThese are mainly:b saturated magnetic circuitsb discharge lamps, fluorescent lightsb electronic converters:v computer processing systems: PC, computers, etc.v etc.These loads generate harmonic currents: supplied by a Generator Set, this cancreate high voltage distortion due to the low short-circuit power of the generator.Uninterruptible Power Supply (UPS)The combination of a UPS and generator set is the best solution for ensuringquality power supply with long autonomy for the supply of sensitive loads.It is also a non-linear load due to the input rectifier. On source switching, theautonomy of the UPS on battery must allow starting and connection of theGenerator Set.21

Protection and Monitoringof a LV Generator SetE89635E79360EElectrical utilityHV incomerNCMains 1feederMains 2feederNon-sensitiveloadUninterruptiblepower supplySensitive feedersFigure 17: GS-UPS combination for Quality Energy.UPS powerUPS inrush power must allow for:b nominal power of the downstream loads. This is the sum of the apparentpowers Pa absorbed by each application. Furthermore, so as not to oversize theinstallation, the overload capacities at UPS level must be considered (forexample: 1.5 ln for 1 minute and 1.25 ln for 10 minutes).b the power required to recharge the battery: this current is proportional to theautonomy required for a given power. The sizing Sr of a UPS is given by:Sr = 1.17 x Pn.The table below defines the pick-up currents and protection devices for supplyingthe rectifier (Mains 1) and the standby mains (Mains 2).Table: pick-up currents and protection devicesnominal power current value (A)Pn mains 1 with 3Ph battery mains 2 or 3Ph application400 V - l1 400 V lu40 kVA 86 60.560 kVA 123 9180 kVA 158 121100 kVA 198 151120 kVA 240 182160 kVA 317 243200 kVA 395 304250 kVA 493 360300 kVA 590 456400 kVA 793 608500 kVA 990 760600 kVA 1180 912800 kVA 1648 121522

Short-circuit downstream of a UPSThe UPS use PWM switch mode power supply to reproduce the output voltage.As a rule their current regulation will limit current to 1.5 times ln. The output filterwill be able to supply for 1/4 of a period loads at 4 or 5 times ln: this may besufficient to selectively eliminate short-circuits on small feeders and thusguarantee continuity of supply.On the other hand, on large feeders, as current is limited, the short-circuit mayremain steady and the UPS immediately switches to the standby supply sourceto increase short-circuit current and ensure tripping of the downstream protectiondevices.Generator Set/UPS combinationb restarting the Rectifier on a Generator SetThe UPS rectifier can be equipped with a progressive starting system of thecharger to prevent harmful pick-up currents when installation supply switches tothe Generator Set.E79477EMains1GS startingUPS chargerstarting5 to 10 sFigure 18: Progressive starting of a type 2 UPS rectifier.b harmonics and voltage distortiontotal voltage distortion t is defined by:Uh 2 nτ(%) =Ufwhere Uhn is the n order voltage harmonic.This value depends on:v the harmonic currents generated by the rectifier (proportional to the power Sr ofthe rectifier)v the longitudinal subtransient reactance X”d of the generatorv the power Sg of the generator.We define U' Rcc (%) = X"d S RS Gbrought to rectifier poweri.e. τ = f(U’ RCC).the generator relative short-circuit voltage,Note 1: as subtransient reactance is great, harmonic distortion is normally toohigh compared with the tolerated value (7 to 8 %) for reasonable economic sizingof the generator: use of a suitable filter is an appropriate and cost-effectivesolution.Note 2: harmonic distortion is not harmful for the rectifier but may be harmful forthe other loads supplied in parallel on the rectifier.23

Protection and Monitoringof a LV Generator SetApplicationA chart is used to find the distortion t as a function of U’ RCC(voltage harmonic distortion)E79366EWithout filterWith filter(incorporated)Figure 19: Chart for calculating type 3 harmonic distortion.The chart gives:b either t as a function of U’ RCCb or U’ RCCas a function of τFrom which Generator Set sizing, Sg, is determined.Exampleb generator sizingv 300 kVA UPS without filter, subtransient reactance of 15 %The power Sr of the rectifier is Sr = 1.17 x 300 kVA = 351 kVAFor a τ < 7 %, the chart gives U’ RCC= 4 %, power Sg is:S G = 351 x 15 = 1 400 kVA4v 300 kVA UPS with filter, subtransient reactance of 15 %For τ = 5 %, the calculation gives U’ RCC= 12 %, power Sg is:S G = 351 x 1512= 500 kVANote: with an upstream transformer of 630 kVA on the 300 kVA UPS without filter,the 5 % ratio would be obtained.The result is that operation on Generator Set must be continually monitored forharmonic currents.If voltage harmonic distortion is too great, use of a filter on the network is themost effective solution to bring it back to values that can be tolerated by sensitiveloads.24

Protection and Monitoringof a LV Generator Set3.4.1.2. Generator Set faults as a loadOne of the parallel-connected Generator Sets may no longer operate as agenerator but as a motor (by loss of its excitation for example). This maygenerate overloading of the other Generator Set(s) and thus place the electricalinstallation out of operation.To check that the Generator Set really is supplying the installation with power(operation as a generator), you need to check the proper flow direction of energyon the coupling busbar using a specific “reverse power” check. Should a faultoccur, i.e. the Set operates as a motor, this function will eliminate the faulty Set.E88043E E88015EMV incomerGSHV busbarSetSet.LVFigure 21: Energy transfer direction - GS as a generator.MV incomerHV busbarGSLVFigure 22: Energy transfer direction - GS as a load.3.4.2. Grounding parallel-connected Generator SetsGrounding of connected Generator Sets may lead to circulation of earth faultcurrents (3 rd order and multiple of 3 harmonics) by connection of Neutrals forcommon grounding (grounding system of the TN or TT type). Consequently, toprevent these currents from flowing between the Generator Sets, we recommendthat you install a decoupling resistance in the grounding circuit.26

3.5.The installation standardsThere are no specific electrical installation rules for Generator Sets performingReplacement or Production functions.Continuity of supply requirements must be taken into account for Safety Sets.For mobile Sets, installation of residual current protection at 30 mA may berequired to guarantee safety of people whatever the connection.3.5.1. Power definitionThe notion of active power delivered is defined by thermal motor sizing. StandardISO 3046-1 for diesel motors states three alternatives for defining nominal powerand specifies the overload capacity definition. The notion of power is thus definedby:b continuous powerthe motor can supply 100 % of its nominal power for an unlimited period of time.This is the notion used for a Production Set.b prime Power (PP)the motor can supply a basic power for an unlimited period of time and 100 % ofnominal power for a specific period of time. Both period and basic power varyaccording to the manufacturer. A typical example would be a basic power of 70 %of nominal power and 100 % of nominal load for 500 hours a year.Overload capacity: this is defined by 10 % of additional power for 1 hour in aperiod of 12 operating hours.b standby powerthis is the maximum power that the machine can deliver over a limited period,normally less than 500 hours a year. This definition must only be applied togenerator sets operating solely as standby sets. As the motor is not able tosupply greater power, a safety factor of at least 10 % must be applied todetermine necessary standby power. If nominal power is determined by standbypower, there is no more margin left for overload.Thus, the same diesel set can be defined by:b a continuous power of 1550 kWb a prime power PP of 1760 kW andb a standby power of 1880 kW.3.5.1.1. Protection device settingsAvailable power values and tolerated overload times must be considered tocalculate installation sizing and protection device settings. This can be specifiedby installation standards.For example, even if the NEC (National Electrical Code - US Standard in Section445-4 (a)) does not indicate a precise acceptable overload percentage, thevalues normally specified for generator protection range between 100 % and125 % of generator nominal current at nominal power and at nominal power factor(typically for 0.8). Moreover, Section 445-4 (a) to (e) EX. allows a 100 %overshoot of nominal current for more than 60 seconds.3.5.2. Safety standard requirements3.5.2.1. Protection device discriminationIn safety terms, electrical installation standards can recommend selective trippingof protection devices for all circuits supplying equipment:b safety equipment (fire pump, smoke extraction motor, etc.)b or for which interruption in energy supply would generate a serious risk.For example, the NEC requires co-ordination of protection devices for mostelevator supply circuits (Section 620-62). Furthermore, section 4-5-1 ofpublication NFPA (1) 1110, Emergency and Stand-by Power Systems, requiresthat manufacturers “optimise selective tripping of Short-Circuit ProtectionDevices”.(1) Publication of the National Association of Fire Protection27

Protection and Monitoringof a LV Generator Set3.5.2.2. Alarm processingA Safety set must never stop, but must supply safety equipment and anti-panicdevices even if this means damage to itself.On the other hand, safety regulations will require increasingly rigorous preventivemaintenance of the Set to ensure safer operation. Consequently, certain thermalmotor alarms - water temperature, oil temperature, oil level - or generator alarms- temperature, overloads - must not cause the Safety Set to trip but must belocked to ensure maintenance or subsequent repairs once installation supplyswitches back to the Main Source.28

In shortVia the Micrologic releases of theMasterpact and Compact NS circuitbreakerranges, Schneider hastaken into account the specificfeatures of the set generators.These devices perform:b the essential protection functionsb additional monitoring functionssuch as measurement of relevantproper operation parametersb connection functions, …This switchgear guaranteesoptimised continuity of supply foroperators.The Schneiderprotection solution4 .1. Micrologic and generator protectionWith respect to generator protection, the Micrologic releases of the MasterpactNT, NW and Compact NS ranges allow optimised settings for fine generatorprotection.4.1.1. Long Time Delay protection of the “InverseDefinite Minimum Time Lag” type of phases (3)The Micrologic P and H include in the microprocessor the various IDMTL typecurves. These curves of variable slope are used to enhance:b discrimination with fuses placed upstream (HV) of the power circuit-breakerb co-ordination with the MV protection relays that may be of the IDMTL typeb protection of specific applications.Five slopes are proposed:b definite Time DTb standard inverse time SIT, curve in i0.5tb very inverse time VIT, curve in itb extremely inverse time EIT, curve in l2tb high voltage fuse HVF, curve in i4tThe slope is calculated as per the formula:( ) .()Tr =time delay bandB = type of curve DT, SIT, VIT, EIT, HVFFor the various time delay bands and slopes, the tripping thresholds in secondsat 1.5 lr are as follows:E89636time delay 0,5 s 1 s 2 s 4 s 8 s 12 s 16 s 20 s 24 sbandDT 0,5 1 2 4 8 12 16 20 24SIT 3,2 6,4 12,9 25,8 51,6 77,4 103 129 155VIT 5 10 20 40 80 120 160 200 240EIT 14 28 56 112 224 336 448 560 672HVF 159 319 637 1300 2600 3800 5100 6400 7700b intermittent overloads and IDMTL slopesAs long as the circuit-breaker remains closed, the intermittent overloads aretaken into account to simulate their effects on the conductors. This functionoptimises the circuit-breaker tripping time.29

The Schneiderprotection solution4.1.2. Generator protectionThe many setting possibilities of the LTD protection slope allow the generatorthermal overload curve to be followed closely. The low setting of the STDprotection is compatible with the short-circuit behaviour of the generator.Optimised protection of the generator thanks to the Micrologic releases of the NT,NW and Compact NS ranges guarantees optimum continuity of supply.E88696E E89628Figure 23: Masterpact NW/NT and Compact NS overload curves.Generator overloadconditionsCircuit-breaker VITprotection curveGeneratorshort-circuitconditionsFigure 24: IDMTL curves and generator overload curve.30.

4.2.Micrologic P & H for generatormonitoringThe Micrologic P and H incorporate other current, voltage, power and frequencyprotection and/or monitoring functions suited to loads such as motors, generatorsand transformers.4.2.1. ImplementationIn the control unit “setting” menu, the operator selectors the functions that hewishes to activate and accesses the various thresholds to be configured.All the settings are made via the keys available on the front face or by remotetransmission.For all functions, except for phase rotation direction, four thresholds must be set:b activation threshold (1)b activation time delay (2)b de-activation threshold (3)b de-activation time delay (4).E88008EActivationthresholdDe-activationthresholdActivationtime delayDe-activationtime delayRelayoutputFigure 25.When the function is activated, according to operator configuration, it can resulteither in tripping or in an alarm, or in both.31

The Schneiderprotection solution4.2.2. The monitoring functions4.2.1.1. Current unbalanceb application:the acceptable values for current negative phase sequence components areapproximately:v 15 % for generatorsv 20 % for motorsAs current unbalance effects are thermal and thus slow, the tripping threshold forthis protection must be configured according to the thermal time constant of theequipment (a few minutes).It can be used as an alarm to allow better distribution of single-phase loads.E88009EI meanFigure 26.b principle:the function compares a current unbalance to the threshold previously set by theuser. The current unbalance Dl is the value as a % of the difference, E max,between maximum current and mean current, lmean.Imean = (I1+I2+I3)/3.Emax = max (Ii) - Imean.∆I = Emax/Imean.The activation and de-activation thresholds, configured by the user, are a % ofImean:∆l = 5 % represents a relatively small unbalance (l1 = 4000 A, l2 = 3800 A, l3 =3600 A).∆l = 90 % represents a strongly unbalanced power supply (l1 = 4000 A, l2 = 1200A, l3 = 1120 A).Example 1: I1 = 4000 A, I2 = 2000 A, I3 = 3300 A.Imean = 3100 A.Emax = I2 - Imoy.∆I = Emax/Imean, ∆I = 35 %.Nota : calculation of current (or voltage) unbalance in HV distribution is normallyused: Iunbal(%) = 100 x (Iinverse)/(Idirect)Micrologic calculates current unbalance as per the formula:Iunbal(%) = 100 x (lmax)/(lmean)Both calculation modes yield similar results.b current unbalance setting:setting range setting step accuracyactivation 5 à 60 % of Imean 1 % -10 % to 0 %thresholdactivation 1 to 40 s 1 s -20 % to 0 %time delayde-activation -5 % to 0 % of 1 % -10 % to 0 %thresholdactivation thresholdde-activation 10 to 360 s 1 s -20 % to 0 %time delay32

4.2.2.2. Overcurrentb application:overcurrent protection is suitable for:v monitoring cyclic loads (prevent temperature rise of loads, etc.)v managing consumption (guard against overshoots).E88010EI consumedI sizingActivation1 hTa = activation time delayTd = de-activation time delayFigure 27: Consumption monitoring.This is used to calculate the mean value of consumed current. It can deliver aload shedding order to remain within the limits:v of the supplier’s contract - Main source -v or of delivered power - Replacement source.It provides thermal type protection for each phase and for the neutral (drytransformers).b principle:this function calculates the mean value of each current of the three phases andthe neutral over a time programmable between 5 minutes and one hour and overa sliding window refreshed every 15 seconds.b overcurrent settingsetting range setting step accuracyactivation 0.2 to 10 In 1 A ± 6.6 %thresholdactivation 1500 s 15 s -20 % to 0 %time delayde-activation 0.2 to 10 In of 1 A ± 6.6 %thresholdactivation thresholdde-activation 10 to 3000 s 15 s -20 % to 0 %time delay4.2.2.3. Voltage unbalanceb application:detection of voltage unbalance or loss.Voltage unbalance protection is more suitable to the installation as a whole,whereas current unbalance protection is more suitable for loads.This is because voltage unbalance will affect all the feeders of this installation,while current unbalance may vary according to its position in the installation.b principle:the function compares voltage unbalance to the threshold set beforehand by theuser.Voltage unbalance DU is the value as a % of the difference, E max, betweenmaximum voltage and the mean value of the phase-to-phase voltages, Umean.Umean = (U12 + U23 + U31)/3.Emax = max(Ui) - Umean.DU= Emax/Umean.33

The Schneiderprotection solutionThe activation and de-activation thresholds, configured by the user, are a % of Umax:∆U = 5 % represents a relatively small unbalance∆U = 90 % represents a strongly unbalanced power supplyExampleCase similar to a phase loss associated with unbalance on the other phases.U12 = 330 V, U23 = 390 V, U31 = 10 V.Umean = 243,3 V.Emax = U31 - Umean.∆U = Emax/Umean, ∆U = 96 %.b voltage unbalance setting:setting range setting step accuracyactivation 2 à 30 % of Umean 1 % -10 % to 0 %thresholdactivation 1 to 40 s 1 s -20 % to 0 %time delayde-activation 2 % of activation 1 % -10 % to 0 %threshold thresholdde-activation 10 to 360 s 1 s -20 % to 0 %time delay4.2.2.4. Overvoltage and undervoltageb application:the overvoltage and undervoltage protections can be used to:v check output voltage of a generatorv prevent transformer saturation (overvoltage)v switch from the Main to the Replacement sourcev prevent temperature rise on motor starting (undervoltage)Note: in actual fact, voltage drops and rises seriously affect the performance ofthe loads supplied (see motor characteristics table below).Voltage variation as a %Motor characteristics Un -10 % Un -5 % Un Un +5 % Un+10%Torque curve 0,81 0,90 1 1,10 1,21Slipping 1,23 1,11 1 0,91 0,83Nominal current 1,10 1,05 1 0,98 0,98Nominal efficiency 0,97 0,98 1 1,00 0,98Nominal power factor 1,03 1,02 1 0,97 0,94Starting current 0,90 0,95 1 1,05 1,10Nominal temp. rise 1,18 1,05 1 1 1,10Off-load P (Watt) 0,85 0,92 1 1,12 1,25b principle:the function is activated when one of the three phase-to-phase voltages (U12,U23, U31) is below (or above) the threshold set by the user for a time longer thanthe time delay. It is de-activated when the 3 phase-to-phase voltages move backabove (or below) the de-activation threshold for a time longer than the time delay.E88011EU max.U min.U12 U23 U31Figure 28.34

undervoltage setting:setting range setting step accuracyactivation 100 à 690 V 5 V 0 % to 5 %thresholdactivation 0.2 to 5 s 0.1 s 0 % to 20 %time delayde-activation 690 V of activation 5 V 0 % to 5 %thresholdthresholdde-activation 0.2 to 36 s 0.1 s 0 % to 20 %time delayb overvoltage setting:setting range setting step accuracyactivation 100 à 1200 V 5 V -5 % to 0 %thresholdactivation 0.2 to 5 s 0.1 s 0 % to 20 %time delayde-activation 100 V of activation 5 V -5 % to 0 %thresholdthresholdde-activation 0.2 to 36 s 0.1 s 0 % to 20 %time delay4.2.2.5 Reverse active powerb applicationreverse power protection is used to protect generators connected with the mains(as an auxiliary or standby source) and generators operating in parallelautonomously (e.g. marine).NoteFor protection of generators driven by diesel sets, the threshold must be setbetween 5 and 20 % of generator active power for a period of 2 seconds.For protection of generators driven by steam turbines, the threshold must be setbetween 1 and 5 % of active power for a period of 2 secondsb principle:the function is activated when the active power flowing in the opposite flowdirection to the energy defined by the user, is greater than the activationthreshold for a time longer than the time delay.E88012EActivation zoneDe-activationzoneDe-activation time delayActivation time delayActivationthresholdDe-activationthresholdReverse powerFigure 29.35

The Schneiderprotection solutionb reverse power setting:setting range setting step accuracyactivation 5 kW to 500 kW 5 kW ± 2.5 %thresholdactivation 0.2 to 20 s 0.1 s -20 % to 0 %time delayde-activation 5 kW of activation 5 kW ± 2.5 %threshold thresholdde-activation 1 to 360 s 0.1 s -20 % to 0 %time delay4.2.2.6. Over frequency and under frequencyb causesincorrect operation of generator / motor setfrequency reduction is possible when a generator is on overloadfrequency increase is possible should the generator begin racing after losing itsload.b application:over frequency and under frequency protection is used to:Check generator frequencyCheck frequency at motor terminalsPrevent saturation of transformers further to a frequency reduction.b principle:the function is activated when frequency exceeds the programmed threshold fora time longer than the time delay.Over frequency monitoringDe-activationtime delayOver Fde-activationzoneOver FactivationzoneActivationtime delayFigure 30: Operation for overfrequency.De-activationthresholdActivationthresholdFrequencyE88007EE88013EDe-activationtime delayUnder FactivationzoneUnder Fde-activationzoneActivationtime delayActivationthresholdDe-activationthresholdFrequencyFigure 31: Operation for underfrequency.36

overfrequency setting:setting range setting step accuracyactivation 45 to 540 Hz 0.5 Hz ± 0.5 Hzthresholdactivation 0.2 to 5 s 0.1 s -20 % to 0 %time delayde-activation 540 Hz of 0.5 Hz ± 0.5 Hzthresholdactivation thresholdde-activation 1 to 36 s 0.1 s -20 % to 0 %time delayb underfrequency setting:setting range setting step accuracyactivation 45 to 540 Hz 0.5 Hz ± 0.5 Hzthresholdactivation 0.2 to 5 s 0.1 s -20 % to 0 %time delayde-activation 45 Hz of 0.5 Hz ± 0.5 Hzthresholdactivation thresholdde-activation 1 to 36 s 0.1 s -20 % to 0 %time delay4.2.2.7 Phase rotation directionb application:phase reversal protection is used to:v check the rotation direction of three-phase motors (e.g. boats berthed)v prevent connection of generators to the electrical network if rotation direction isreversedb principle:the function compares the phase succession order.In event of reversal, protection is activated after 300 ms (tripping or alarm).b phase rotation direction setting:DFtime delaysetting rangeΦ1, Φ2, Φ3 or Φ1, Φ3, Φ2300 ms37

The Schneiderprotection solution4.3.Micrologic for insulation faultprotectionCurrents due to insulation faults can be dangerous for people (risk of indirectcontact) and equipment (fire risk).To provide protection and satisfy all installation systems as completely aspossible, the Micrologic range incorporates as standard:b on 6.0 units, ground protectionb on 7.0 units, residual current protection.4.3.1. Ground protectionb fire protection:this is stipulated by the NEC (National Electric Code) in the USA to avoid risk offire that could occur in event of an impedance-grounded (arc) fault, not detectedby the standard L, S, I protection devices (fault smaller than the STD threshold orintermittent fault).b protection of people:this is also used on TN-S networks with very long cables to guaranteeinstantaneous tripping in event of an insulation fault. Ground protection isperformed according to two systems.4.3.1.1. Residual sensorThe “residual” type protection determines earth fault current by the vector sum ofphase and neutral currents.This protection detects faults downstream of the circuit-breaker.A CT is placed on each of the phases and the neutral (if distributed).For the Masterpacts, the CTs are built into the circuit-breakers.E88017ECircuit-breakerwith built-inMX protectionFigure 32.The Neutral CT provides both ground/residual protection and overload protectionof the neutral conductor.38

4.3.1.2. Source Ground Return (SGR)The “Source Ground Return” system directly measures the earth fault current bya specific external sensor.This protection detects faults upstream and downstream of the circuit-breaker.It is only possible at the supply end of the LV installation.E88019 E88018Figure 33.Note: the SGR CT is specific to this application.The Ground protection and Neutral protection are separate and thus can becombined.Setting the protection devicesGround protection can be set for its threshold (limited to 1200 A) by 9 bands andby its time delay (same as the Short Time Delay).To enhance discrimination with fuses or other circuit-breakers, part of the groundprotection curve can be converted into a reverse curve by choosing the l 2 tONsetting.The SGR protection requires use of the MDGF module.4.3.2. Residual current device (RCD) protection or“zero sequence” systemRCD protection is stipulated by installation standards (IEC 60 364) for protectionof people and equipment in the following cases:b TT type grounding systems, in which currents resulting from insulation faultsare smallb TN-S type networks with very long cables, in which the instantaneous thresholdis not sufficient to protect a short-circuit at the end of the lineb IT networks with very long cables.This protection is also used to provide additional fire protection.Its threshold from 500 mA to 30 A and time delay can be set to ensure residualcurrent discrimination.Figure 34.An external rectangular toroid sensor is compulsory.39

Summary5.1.DiagramA typical example of a high power electrical installation for an office building (seeNote 1).E88014ESourceIT safetysourceTN-S replacementsourceMain LV boardGSGSNon-priorityfeeders,heating, etc.SafetyfeedersNon-sensitivepriority feeders,lighting, elevator, etc.300 kVASensitivefeeders,computer, etc.ChassisCOMmoduleMain LV boardSourceIT safetysourceGSTN-SreplacementsourceGSChassisCOMmoduleNon-priorityfeedersCommunicationbusProprietarybus40

5.2. CommentsSource to protect Protection MonitoringMain sourceThe Long and Short Time Delay protection settings The monitoring functions mainly concernare of the Distribution type. Discrimination with verification of inrush power: this allows use, ifdownstream feeders is of the time type and total. necessary, of load shedding to cope with loadpeaks.Replacement sourceE88104The set is optimised with exact dimensioning.Setting of the LTD protection will follow the Set’sprotection curve and setting of the STD protectionwill be low (from 1.5 to 2.5 lg).The Set supplies priority feeders. As ourexample is an office building, these feeders areoften not linear. Due to the power ratio and highsubtransient impedances between the Set andthe Main source (transformer), voltage totalharmonic distortion (THDu) is often very highand greater than load withstand value (even fornon-sensitive loads).1. Installation of a Micrologic H ensurespermanent monitoring, if necessary, of therelevant harmonic pollution parameters.Safety sourceDiscrimination with downstream priority feedersmust allow for the low settings (in particular for theSTD).For feeders supplied by the UPS, discriminationmust be ensured with the downstream feeders (thisis because the UPS switches to mains 2 to performthe discrimination function).The Set must operate in all circumstances.The settings made will eliminate nuisance tripping.Discrimination must allow for these settings andchoose a downstream circuit distribution that willenable this.E88697l measurement and H spectrum vignettesE886982. Use of a UPS incorporating a harmonicsuppressionfilter is the ideal solution for using aGenerator Set/UPS combination with optimisedsizing and to bring upstream total harmonicdistortion down to a completely acceptable value.Fine network analysis in real time is not required.However, alarm transfer and storage arerecommended. If necessary, networkparameters (voltage, current, etc.) can bemeasured for analysis after the fault.E88103ESourceSafety andreplacement sourceGSNote 1: in the diagram on the previous page, theSafety Set and the Replacement Set are separate:this is advantageous only if the priority and safetyfeeders are physically separate. As explained inparagraph 1.3, the 2 functions are normally grouped.The following diagram gives an example of this:Non-priorityfeedersSafetyPriorityfeedersFigure 35.41

Summary5.3. Summaryfunctions production set replacement safety set parallel- commentssetconnected sets*generator overload protectionoverloads b b v b v (1) (1) for Production GS allow for:- one hour overload- one hour overload every 12 hoursNote: disabling of thermal memory may be requestedshort-circuits b b v b v Magnetic setting at 1.5 lninsulation fault protectionfire ground protection b b v b v Use in case of TN-S grounding systemground fault protection v v v v For uncoupling and placing the GS out of operation if faultrestricted differentialprotection of people b b b b Protection, if necessary, of the RCD type (Zero Sequence)network monitoringcurrent unbalance v v v (2) v (2) Safety GS: the Generator Set must operate whatevercurrent unbalanceProduction and/or Replacement GS: same problem as withsupply by transformersovercurrent v (3) v (3) v v (3) (3) to be used to perform load sheddingvoltage unbalance v v v vovervoltage and b (4) b (4) v b v (4) (4) use Protection only if risk of breaking equipment /or lossundervoltage of safety is greater in the event of overvoltage /frequency b (4) b (4) v b v (4) undervoltage than in the event of breakingreverse active power ns ns ns v If the GS operates as a motor, there is a risk of:- deterioration of the diesel set- placing all sources out of operation (by overload)harmonic measurement v v v In particular, if non-linear loads are great during operationon GS (>50 %)For example Replacement GS with high power UPS(computer centre)b Important or compulsoryv Recommendedns Not significant* In case of two choices, choose that for the parallel-connected generator set category.42

Additional technicalinformations6.1. Characteristics tables of circuit breakers 44Compact NS and Masterpact6.2. Control units characteristicsSTR and Micrologic A, H and P 526.3. Communication characteristicsfor Compact NS and Masterpact 71ApplicationsE8962943

6.1. Characteristics tablesof circuit breakersCompact NS up to 630 A045345si048286siCompact NS250H.Compact NS630L.(1) 2P in 3P case for type N only(2) specific trip units are available for operationalvoltages > 525 V(3) operational voltage y 500 V.Compact circuit breakersnumber of polescontrol manual toggledirect or extended rotary handleelectricconnections fixed front connectionrear connectionplug-in (on base)front connectionrear connectionwithdrawable (on chassis)front connectionrear connectionelectrical characteristics as per IEC 60947-2 and EN 60947-2rated current (A) In 40 °C65 °Crated insulation voltage (V)Uirated impulse withstand voltage kV)Uimprated operational voltage (V) Ue AC 50/60 HzDCtype of circuit breakerultimate breaking capacity (kA rms) lcu AC 50/60 Hz 220/240 V380/415 V440 V500 V525 V660/690 VDC250 V (1P)500 V (2P in series)service breaking capacity lcs % Icusuitability for isolationutilisation categorydurability (C-O cycles)electrical characteristics as per NEMA AB1breaking capacity (kA)electrical characteristics as per UL508breaking capacity (kA)mechanicalelectrical 440 V In/2In240 V480 V600 V240 V480 V600 Vprotectiontrip unitsoverload protection long time Ir (In x …)short-circuit protection short time lsd (Ir x …)instantaneous Ii (In x …)earth-fault protectionlg (In x …)zone selective interlockingZSIadd-on earth-leakage protectionadd-on Vigi modulecombination with Vigirex relaycurrent measurementsadditional measurement, indication and control auxiliariesindication contactsMX shunt and MN undervoltage releasesvoltage-presence indicatorcurrent-transformer module and ammeter moduleinsulation-monitoring moduleremote communication by busdevice-status indicationdevice remote operationtransmission of settingsindication and identification of protection devices and alarmstransmission of measured current valuesinstallationaccessoriesterminal extensions and spreadersterminal shields and interphase barriersescutcheonsdimensions (mm) W x H x D fixed, front connections 2-3P / 4Pweight (kg) fixed, front connections 3P / 4Psource changeover system (see section on source changeover systems)manual, remote-operated and automatic source changeover systems44

NS125E NS100 NS160 NS250 NS400 NS6303, 4 2 (1) , 3, 4 2 (1) , 3, 4 2 (1) , 3, 4 3, 4 3, 4b b b b b b- b b b b b- b b b b bb b b b b bb b b b b b- b b b b b- b b b b b- b b b b b- b b b b b125 100 160 250 400 630- 100 150 220 320 500750 750 750 750 750 7508 8 8 8 8 8500 690 690 690 690 690- 500 500 500 500 500E N H L N H L N H L N H L N H L25 85 100 150 85 100 150 85 100 150 85 100 150 85 100 15016/10 25 70 150 36 70 150 36 70 150 45 70 150 45 70 15010 25 65 130 35 65 130 35 65 130 42 65 130 42 65 1306 18 50 100 30 50 70 30 50 70 30 50 100 30 50 70- 18 35 100 22 35 50 22 35 50 22 35 100 22 35 50- 8 10 75 8 10 20 8 10 20 10 (2) 20 (2) 75 (2) 10 (2) 20 (2) 35 (2)50 85 100 50 85 100 50 85 100 - 85 - - 85 -50 85 100 50 85 100 50 85 100 - 85 - - 85 -50% 100% 100% 100% 100% 100% (3)b b b b b bA A A A A A10 000 50 000 40 000 20 000 15 000 15 0006 000 50 000 40 000 20 000 12 000 8 0006 000 30 000 20 000 10 000 6 000 4 000E N H L N H L N H L N H L N H L5 85 100 200 85 100 200 85 100 200 85 100 200 85 100 2005 25 65 130 35 65 130 35 65 130 42 65 130 42 65 130- 10 35 50 20 35 50 20 35 50 20 35 50 20 35 50E N H L N H L N H L N H L N H L- 85 85 - 85 85 - 85 85 - 85 85 - 85 85 -- 25 65 - 35 65 - 35 65 - 42 65 - 42 65 -- 10 10 - 10 10 - 18 18 - 18 18 - 30 30 -non interchangeable TM (thermal-magnetic) STR22 (electronic) STR23 (electronic) STR53 (electronic)12.5… 125 (A) b b b b- - b b b- b b b b- - - - b- - - - bb b b b bb b b b b- - - - bb b bb b b- b b- b b- b b- b b b b- b b b b- - - - b- - - - b- - - - bb b bb b bb b b105 x 161 x 86 105 x 161 x 86 / 140 x 161 x 86 140 x 255 x 110 / 185 x 255 x 1101.7 / 2.3 1.6 to 1.9 / 2.1 to 2.3 6.0 / 7.8- b b45

6.1. Characteristics tablesof circuit breakersCompact NSfrom 630 up to 3200 A045151si045178siCompact NS800H.Compact NS2000H.(1) 65°C with vertical connections. See the temperaturederating tables for other types of connections.Compact circuit breakersnumber of polescontrol manual toggledirect or extended rotary handleelectrictype of circuit breakerconnections fixed front connectionrear connectionwithdrawable (on chassis) front connectionrear connectionelectrical characteristics as per IEC 60947-2 and EN 60947-2rated current (A) In 50 °C65 °C (1)rated insulation voltage (V)Uirated impulse withstand voltage (kV)Uimprated operational voltage (V) Ue AC 50/60 HzDCtype of circuit breakerultimate breaking capacity (kA rms) lcu AC 50/60 Hz 220/240 V380/415 V440 V500/525 V660/690 VDC250 V500 Vservice breaking capacity (kA rms) lcs Value or % Icushort-time withstand current (kA rms) lcw 0.5 sV AC 50/60 Hz1 ssuitability for isolationutilisation categorydurability (C-O cycles) mechanicalelectrical 440 V In/2In690 V In/2Inpollution degreeelectrical characteristics as per Nema AB1breaking capacity at 60 Hz (kA)protection and measurementsinterchangeable control unitsoverload protection long time Ir (In x …)short-circuit protection short time Isd (Ir x …)instantaneous Ii (In x …)earth-fault protectionlg (In x …)residual earth-leakage protectionI∆nzone selective interlockingZSIprotection of the fourth polecurrent measurementsadditional indication and control auxiliariesindication contactsvoltage releasesremote communication by busdevice-status indicationdevice remote operationtransmission of settingsindication and identification of protection devices and alarmstransmission of measured current valuesinstallationaccessoriesdimensions fixed devices, front connections (mm)H x W x Dweight fixed devices, front connections (kg)MX shunt releaseMN undervoltage release240 V480 V600 Vterminal extensions and spreadersterminal shields and interphase barriersescutcheons3P4P3P4Psource changeover system (see section on source changeover systems)manual, remote-operated and automatic source changeover systems46

NS630b NS800 NS1000 NS1250 NS1600 NS1600b NS2000 NS2500 NS32003, 4 3, 4 3, 4b b bb b -b b -N H L N H N Hb b b b b b bb b b b b - -b b b b b - -b b b b b - -630 800 1000 1250 1600 1600 2000 2500 3200630 800 1000 1250 1510 1550 1900 2500 2970750 750 7508 8 8690 690 690500 500 500N H L N H N H50 70 150 50 70 85 12550 70 150 50 70 70 8550 65 130 50 65 65 8540 50 100 40 50 65 -30 42 25 30 42 65 -- - - - - - -- - - - - - -75% 50% 100% 75% 50% 65 kA 75%25 25 10 25 25 40 4017 17 7 17 17 28 28b b bB B A B B B B10000 10000 50006000 5000 5000 30005000 4000 2000 20004000 3000 2000 20002000 2000 1000 1000III III IIIN H L N H N H50 65 125 50 65 - 85 125 -35 50 100 35 50 - 65 85 -25 50 - 25 50 - 50 - -Micrologic 2.0 Micrologic 5.0 Micrologic 2.0 A Micrologic 5.0 A Micrologic 6.0 A Micrologic 7.0 Ab b b b b b- b - b b bb b b b b b- - - - b -- - - - - b- - b b b bb b b b b b- - b b b bbbbbbbb b b b b bb b b b - -- - b b b b- - b b b b- - b b b bb -b -bb327 x 210 x 147 350 x 420 x 160327 x 280 x 147 350 x 535 x 16014 2418 36b47

6.1. Characteristics tablesof circuit breakersMasterpact NT06 to NT16056408sicommon characteristicsnumber of poles 3 / 4rated insulation voltage (V) Ui 1000/1250impulse withstand voltage (kV) Uimp 12rated operational voltage (V AC 50/60 Hz) Ue 690suitability for isolation IEC 60947-2degree of pollution IEC 60664-1 3circuit-breaker characteristics as per IEC 60947-2rated current (A) In at 40 °C / 50 °C**rating of 4th pole (A)sensor ratings (A)type of circuit breakerultimate breaking capacity (kA rms) Icu 220/415 VV AC 50/60 Hz440 V525 V690 Vrated service breaking capacity (kA rms) Ics % Icurated short-time withstand current (kA rms) Icw 0.5 sV AC 50/60 Hz3 sintegrated instantaneous protection (kA peak ±10%)rated making capacity (kA peak) Icm 220/415 VV AC 50/60 H440 V525 V690 Vbreak time (ms)closing time (ms)circuit-breaker characteristics as per NEMA AB1breaking capacity (kA)V AC 50/60 Hz240 V480 V600 Vswitch-disconnector characteristics as per IEC 60947-3type of switch-disconnectorrated making capacity (kA peak) Icm 220/415 VV AC 50/60 Hz440 V500/690 Vrated short-time withstand current (kA rms) Icw 0.5 sV AC 50/60 Hz3 sultimate breaking capacity (Icu) with external protection relay,maximum delay 350 msinstallation, connection and maintenanceservice life mechanical with maintenanceC/O cycles x 1000without maintenanceelectrical without maintenance 440 V690 Vmotor control (AC3-947-4)690 Vconnection drawout FCRCfixed FCRCdimensions (mm) drawout 3PH x W x D4Pfixed 3P4Pweight (kg) drawout 3P/4P(approximate) fixed 3P/4P* see the current-limiting curve in the "additional characteristics" section** 50 °C: rear vertical connected. Refer to temperature derating tablesfor other connection types.(1) SELLIM system.48

NT06 NT08 NT10 NT12 NT16630 800 1000 1250 1600630 800 1000 1250 1600400 400 400 630 800to 630 to 800 to 1000 to 1250 to 1600H1 L1* H142 150 4242 130 4242 100 4242 25 42100 % 100 %42 10 4220 - 20- 1 (1) -88 330 8888 286 8888 220 8888 52 8825 9 25< 50 < 5042 150 4242 100 4242 25 42HAHA75 7575 7575 7542 4220 2035 3525 25 2512.5 12.5 12.56 3 6 (NT16: 3)3 2 2 (NT16: 1)3 2 2 (NT16: 1)b b bb b bb b bb b b322 x 288 x 280322 x 358 x 280301 x 274 x 211301 x 344 x 21130/3914/18sensor selectionsensor rating (A) 400 630 800 1000 1250 1600Ir threshold setting (A) 160 to 400 250 to 630 320 to 800 400 to 1000 500 to 1250 640 to 160049

6.1. Characteristics tablesof circuit breakersMasterpact NW08 à NW63056409sicommon characteristicsnumber of poles 3 / 4rated insulation voltage (V) Ui 1000/1250impulse withstand voltage (kV) Uimp 12rated operational voltage (V AC 50/60 Hz) Ue 690/1150suitability for isolation IEC 60947-2degree of pollution IEC 60664-1 4circuit-breaker characteristics as per IEC 60947-2rated current (A) In at 40 °C / 50 °C**rating of 4th pole (A)sensor ratings (A)056410sitype of circuit breakerultimate breaking capacity (kA rms) Icu 220/415 VV AC 50/60 Hz440 V525 V690 V1150 Vrated service breaking capacity (kA rms) Ics % Icurated short-time withstand current (kA rms) Icw 1sV AC 50/60 Hz3sintegrated instantaneous protection (kA peak ± 10%)rated making capacity (kA peak) Icm 220/415 VV AC 50/60 Hz440 V525 V690 V1150 Vbreak time (ms)closing time (ms)circuit-breaker characteristics as per NEMA AB1breaking capacity (kA)V AC 50/60 Hz240 V480 V600 Vswitch-disconnector characteristics as per IEC 60947-3type of switch-disconnectorrated making capacity (kA peak) Icm 220/415 VV AC 50/60 Hz440 V500/690 V1150 Vrated short-time withstand current (kA rms) Icw 1 sV AC 50/60 Hz3 sultimate breaking capacity (Icu) with external protection relay,maximum delay 350 msinstallation, connection and maintenanceservice life mechanical with maintenanceC/O cycles x 1000without maintenanceelectrical without maintenance 440 V690 V1150 Vmotor control (AC3-947-4)690 Vconnection drawout FCRCfixed FCRCdimensions (mm) drawout 3PH x W x D4Pfixed 3P4Pweight (kg) drawout 3P/4P(approximate) fixed 3P/4P* see the current-limiting curve in the "additional characteristics" section** 50°C: rear vertical connected. Refer to temperature derating tablesfor other connection types.(1) except 4000 A.50

NW08 NW10 NW12 NW16 NW20 NW25 NW32 NW40 NW40b NW50 NW63800 1000 1250 1600 2000 2500 3200 4000 4000 5000 6300800 1000 1250 1600 2000 2500 3200 4000 4000 5000 6300400 400 630 800 1000 1250 1600 2000 2000 2500 3200to 800 to 1000 to 1250 to 1600 to 2000 to 2500 to 3200 to 4000 to 4000 to 5000 to 6300N1 H1 H2 L1* H10 H1 H2 H3 L1* H10 H1 H2 H3 H10 H1 H242 65 100 150 - 65 100 150 150 - 65 100 150 - 100 15042 65 100 150 - 65 100 150 150 - 65 100 150 - 100 15042 65 85 130 - 65 85 130 130 - 65 85 130 - 100 13042 65 85 100 - 65 85 100 100 - 65 85 100 - 100 100- - - - 50 - - - - 50 - - - 50 - -100 % 100 % 100 % 100 %42 65 85 30 50 65 85 65 30 50 65 85 65 50 100 10022 36 50 30 50 36 75 65 30 50 65 75 65 50 100 100without without 190 80 without without 190 150 80 without without 190 150 without without 27088 143 220 330 - 143 220 330 330 - 143 220 330 - 220 33088 143 220 330 - 143 220 330 330 - 143 220 330 - 220 33088 143 187 286 - 143 187 286 286 - 143 187 286 - 220 28688 143 187 220 - 143 187 220 220 - 143 187 220 - 220 220- - - - 105 - - - - 105 - - - 105 - -25 25 25 10 25 25 25 25 10 25 25 25 25 25 25 25< 70 < 70 < 70 < 8042 65 100 150 - 65 100 150 150 - 65 100 150 - 100 15042 65 100 150 - 65 100 150 150 - 65 100 150 - 100 15042 65 85 100 - 65 85 100 100 - 65 85 100 - 100 100NA HA HF HA10 HA HF HA10 HA HF HA10 HA88 105 187 - 105 187 - 121 187 - 18788 105 187 - 105 187 - 121 187 - 18788 105 187 - 105 187 - 121 187 - 187- - - 105 - - 105 - - 105 -42 50 85 50 50 85 50 55 85 50 85- 36 50 50 36 75 50 55 75 50 8542 50 85 50 50 85 50 55 85 50 8525 20 20 1012.5 10 10 510 10 10 3 - 8 8 2 3 - 5 5 1.25 - 1.5 1.510 10 10 3 - 6 6 2 3 - 2.5 2.5 1.25 - 1.5 1.5- - - - 0.5 - - - - 0.5 - - - 0.5 - -10 10 10 - - 6 6 6 - - 2.5 2.5 2.5 - - -b b b b b b b b b b b b b b - -b b b b b b b b b b b b b b b bb b b - - b b - - - b (1) b (1) - - - -b b b - - b b - - - b b - - b b439 x 441 x 395 479 x 786 x 395439 x 556 x 395 479 x 1016 x 395352 x 422x 297 352 x 767x 297352 x 537x 297 352 x 997x 29790/120 225/30060/80 120/160sensor selectionsensor rating (A) 400 630 800 1000 1250 1600 2000 2500 3200 4000 5000 6300Ir threshold 160 250 320 400 500 630 800 1000 1250 1600 2000 2500setting (A) to 400 to 630 to 800 to 1000 to 1250 to 1600 to 2000 to 2500 to 3200 to 4000 to 5000 to 630051

6.2. Control unitscharacteristicsCompact NS400 to 630In shortCompact NS400 to 630 circuitbreakers, types N, H and L, 3-poleand 4-pole, may be equipped withany of the STR23SE, STR23SV,STR53UE and STR53SV electronictrip units.The STR53UE and STR53SV tripunits offer a wider range of settingsand the STR53UE offers a numberof optional protection, measurementand communications functions.For DC applications, the CompactNS400H and 630H circuit breakersare equipped with a built-in MPmagnetic trip unit.E88733E60 250 400 500 630STR23SE / STR53UESTR23SE / STR53UESTR23SV / STR53SVMPStandard protectionwith selectivityProtection of DCdistribution systemsProtection of systems supplied bygenerators. Protection of long cablesProtection of systems U > 525 VSelection of the trip unit depends on the type of distribution system protected andthe operational voltage of the circuit breaker.Protection for all types of circuits, from 60 to 630 A, is possible with only four tripunitcatalogue numbers, whatever the circuit-breaker operational voltage:b U y 525 V: STR23SE or STR53UEb U > 525 V: STR23SV or STR53SV.Trip units do not have a predefined rating. The tripping threshold depends on thecircuit breaker rating and the LT (long time) current setting.For example, for an STR23SE trip unit set to the maximum value, the trippingthreshold is:v 250 A, when installed on a Compact NS400 250 Av 630 A, when installed on a Compact NS630.52

STR23SE (U y 525 V) and STR23SV (U > 525 V)electronic trip unitsE887346 1 73test+-.7.63.5Io.8 .91x InSTR 23 SEIr.9 .93.88 .95.85 .98.8 1x Ioalarm43290105 %IrIsd5 6x Ir7810IrIsdE88735t123450 Ir Im1 long-time threshold (overload protection)2 long-time tripping delay3 short-time pick-up (short-circuit protection)4 short-time tripping delay5 instantaneous pick-up (short-circuit protection)6 test connector7 percent load indication.ProtectionIThe protection functions may be set using the adjustment dials.Overload protectionLong-time protection with an adjustable threshold and fixed tripping delay:b Io base setting (6-position dial from 0.5 to 1)b Ir fine adjustment (8-position dial from 0.8 to 1).Short-circuit protectionShort-time and instantaneous protection:b short-time protection with an adjustable pick-up and fixed tripping delayb instantaneous protection with fixed pick-up.Protection of the fourth poleOn four-pole circuit breakers, neutral protection is set using a three-positionswitch to 4P 3d (neutral unprotected), 4P 3d + N/2 (neutral protection at 0.5 In) or4P 4d (neutral protection at In).IndicationsA LED on the front indicates the percent load:b ON - load is > 90 % of Ir settingb flashing - load is > 105 % of Ir setting.TestA mini test kit or a portable test kit may be connected to the test connector on thefront to check circuit-breaker operation after installing the trip unit or accessories.53

6.2. Control unitscharacteristicsCompact NS400 to 630STR53UE (U y 525 V) and STR53SV (U > 525 V)electronic trip unitsE887378 1 2 3 4 5 6 9 7(*) (*)Io.8 .9.7 1.6.5 1x Intest+-STR 53 UEIrIsd%Ir >Ir >Isd >Ig.9 .93.884 5 4 6 .953 6 3 8.85 .98 2 8 2 10.8 1 1.5 10 1.5 11x Iox Irx Intrtsd8 16 .3 .34(s).2.22.1 .10,5 160 0on(s) @ 6 Ir I 2 t offIiIg g.5 .6.4 .7.3 .8.2 1x Intg.4 .4(s) .3 .3.2 .2.1 .1on I 2 t offtestµ P> Ir> ImfaultAtsd> IhIn I1 I2 I3Ir Isd litrtE8873612673450 Ir Isd IiI1 long-time threshold (overload protection)2 long-time tripping delay3 short-time pick-up (short-circuit protection)4 short-time tripping delay5 instantaneous pick-up (short-circuit protection)6 optional earth-fault pick-up7 optional earth-fault tripping delay8 test connector9 battery and lamp test pushbutton.(*) STR avec l'option "défaut terre".Earth-fault protection (T) (see the "Options for the STR53UE electronictrip unit" section on the following pages).With the earth-fault option (T) on the STR53UE electronic trip unit, an externalneutral sensor can be installed (situation for a three-pole circuit breaker in adistribution system with a neutral). Available ratings of external neutralsensors: 150, 250, 400, 630 A.ProtectionThe protection functions may be set using the adjustment dials.Overload protectionLong-time protection with adjustable threshold and tripping delay:b Io base setting (6-position dial from 0.5 to 1)b Ir fine adjustment (8-position dial from 0.8 to 1).Short-circuit protectionShort-time and instantaneous protection:b short-time protection with adjustable pick-up and tripping delay,with or without constant I 2 tb instantaneous protection with adjustable pick-up.Protection of the fourth poleOn four-pole circuit breakers, neutral protection is set using a three-positionswitch to 4P 3d (neutral unprotected), 4P 3d + N/2 (neutral protection at 0.5 In) or4P 4d (neutral protection at In).Overload LED (% Ir)A LED on the front indicates the percent load:b when ON, the load is > 90 % of Ir settingb when flashing, the load is > 105 % of Ir setting.54

E88738Setting exampleWhat is the overload-protection threshold of aCompact NS400 circuit breaker equipped withan STR23SE (or STR23SV) trip unit setto Io = 0.5 and Ir = 0.8 ?IoIr.8 .9 .9 .93.7 1 .88 .95.63.85 .98.5.8 1x Inx IoAnswerIn x Io x Ir = 400 x 0.5 x 0.8 = 160 A.The identical trip unit, with identical settings butinstalled on a Compact NS630 circuit breaker, willhave an overload-protection threshold of:630 x 0.5 x 0.8 = 250 A.Fault indicationsA LED signals the type of fault:b overload (long-time protection) or abnormal internal temperature (> Ir)b short-circuit (short-time protection) or instantaneous (> Isd)b earth fault (if earth-fault protection option installed) (> Ig)b microprocessor malfunction:v both (> Ig) and (> Isd) LEDs ONv (> Ig) LED ON (if earth-fault protection option (T) installed).Battery powered. Spare batteries are supplied in an adapter box. The LEDindicating the type of fault goes OFF after approximately ten minutes to conservebattery power. The information is however stored in memory and the LED can beturned back ON by pressing the battery/LED test pushbutton. The LEDautomatically goes OFF and the memory is cleared when the circuit breaker isreset.TestA mini test kit or a portable test kit may be connected to the test connector on thefront to check circuit-breaker operation after installing the trip unit or accessories.The test pushbutton tests the battery and the (% Ir), (> Ir), (> Isd) and (> Ig)LEDs.Self monitoringThe circuit breaker trips if a microprocessor fault or an abnormal temperatureis detected.OptionsFour options are available:b earth-fault protection Tb ammeter Ib zone selective interlocking ZSIb communications option COM.trip units STR23SE (U y 525V) STR53UE (U y 525V)STR23SV (U > 525V) STR53SV (U > 525V)ratings (A) In 20 to 70 ° C (1) 150 250 400 630 150 250 400 630circuit breaker Compact NS400 N/H/L b b b - b b b -Compact NS630 N/H/L - - - b - - - boverload protection (Long time)current setting Ir = In x … 0.4...1 0.4...1adjustable, 48 settingsadjustable, 48 settingstime delay (s) fixed adjustable(min.…max.) at 1.5 x Ir 90...180 8...15 34...50 69...100 138...200 277...400at 6 x Ir 5...7.5 0.4...0.5 1.5...2 3...4 6...8 12...16at 7.2 Ir 3.2...5.0 0.2...0.74 1...1.4 2...2.8 4...5.5 8.2...11short-circuit protection (Short time)pick-up (A) Isd = Ir x … 2...10 1.5...10accuracy ± 15 % adjustable, 8 settings adjustable, 8 settingstime delay (ms) fixed adjustable, 4 settings + "constant I 2 t" optionmax. resettable time y 40 y 15 y 60 y 140 y 230max. break time y 60 y 60 y 140 y 230 y 350short-circuit protection (instantaneous)pick-up (A) Ii = In x … 11 1.5...11fixedadjustable, 8 settingsprotection of the fourth poleneutral unprotected 4P 3d no protection no protectionneutral protection at 0.5 In 4P 3d + N/2 0.5 x Ir 0.5 x Irneutral protection at In 4P 4d 1 x Ir 1 x Iroptionsindication of fault type - b (standard)zone selective interlocking ZSI - b (2)communications COM - b (2)built-in ammeter I - b (2)earth-fault protection T - b (2)(1) If the trip units are used in high-temperature environments, the setting must take into account the thermal limitations of the circuit breaker. The overloadprotection setting may not exceed 0.95 at 60° C or 0.9 at 70° C for the Compact NS400, and 0.95 at 50° C, 0.9 at 60° C or 0.85 at 70° C for the Compact NS630.(2) This option is not available for the STR53SV trip unit.55

6.2. Control unitscharacteristicsCompact NS400 to 630In shortPossible combinations:b Ib Tb I + Tb I + COMb I + T + COMb ZSIb ZSI + Ib ZSI + Tb ZSI + I + Tb ZSI +I + COMb ZSI + I + T + COMOptions for the STR53UE electronic trip unitEarth-fault protection (T)typeResidualpick-up Ig = In x … 0.2 to 1accuracy ± 15%adjustable, 8 settingstime delayadjustable, 4 settings"constant I 2 t" function max. resettable time 60 140 230 350max. break time y 140 y 230 y 350 y 500Ammeter (I)A digital display continuously indicates the current of the phase with the greatestload. The value of each current (I1, I2, I3, Ineutral) may be successivelydisplayed by pressing a scroll button.LEDs indicate the phase for which the current is displayed.Ammeter display limits:b minimum current u 0.2 x In. Lower currents are not displayedb maximum current y 10 x In.Zone selective interlocking (ZSI)A number of circuit breakers are interconnected one after another by a pilot wire.In the event of a short-time or earth fault:b if a given STR53UE trip unit detects the fault, it informs the upstream circuitbreaker, which applies the set time delayb if the STR53UE trip unit does not detect the fault, the upstream circuit breakertrips after its shortest time delay.In this manner, the fault is cleared rapidly by the nearest circuit breaker.The thermal stresses on the circuits are minimised and time discrimination ismaintained throughout the installation.The STR53UE trip unit can handle only the downstream end of a zone selectiveinterlocking function. Consequently, the ZSI option cannot be implementedbetween two Compact NS circuit breakers.Opto-electronic outputsUsing opto-transistors, these outputs ensure total isolation between the internalcircuits of the trip unit and the circuits wired by the user.Communications option (COM)This option transmits data to Digipact distribution monitoring and control modules.Transmitted data:b settingsb phase and neutral currents (rms values)b highest current of the three phasesb overload-condition alarmb cause of tripping (overload, short-circuit, etc.).56

MP DC trip unitsE88739Im(A)4400 300050003800 2500 3500 570020004000In ImMagnetic trip units for Compact NS400/630 three-pole, type H circuit breakers.These trip units are specifically designed to protect DC distribution systems.They are not interchangeable. The circuit breaker and trip unit are suppliedfully assembled.built-in trip units MP1 MP2 MP3circuit breaker Compact NS400H b b -Compact NS630H b b bshort-circuit protection (magnetic)pick-up (A) Im adjustable adjustable adjustable800...1600 1250...2500 2000...400057

E887406.2. Control unitscharacteristicsIn shortMicrologic 2.0 and 5.0 control unitsprotect power circuits. Micrologic 5.0offers time discrimination for shortcircuitsas well.Micrologic 5.0Micrologic for CompactNS630b to 3200ProtectionProtection thresholds and delays are set using the adjustment dials.Overload protectionTrue rms long-time protection.Thermal memory: thermal image before and after tripping.Setting accuracy may be enhanced by limiting the setting range using a differentlong-time rating plug.Overload protection can be cancelled using a specific LT rating plug "Off".Short-circuit protectionShort-time (rms) and instantaneous protection.Selection of I 2 t type (ON or OFF) for short-time delay.Neutral protectionOn three-pole circuit breakers, neutral protection is not possible.On four-pole circuit breakers, neutral protection may be set using a threepositionswitch: neutral unprotected (4P 3d), neutral protection at 0.5 In (4P 3d +N/2) or neutral protection at In (4P 4d).IndicationsOverload indication by alarm LED on the front; the LED goes on when the currentexceeds the long-time trip threshold.TestA mini test kit or a portable test kit may be connected to the test connector on thefront to check circuit-breaker operation after installing the trip unit or accessories.Note.Micrologic A control units come with a transparent lead-seal cover as standard.1long timeIr.7 .8 .9.6.5.4x In.95.981tr(s)4 8 12162021.5@ 6 Ir 24alarm253short timeIsd2.5 3 4 562 81.5 10x Irsettingtsd(s).4 .4 .3.2.3.2.1on I 2 tdelay.10offinstantaneousI i6 8 104 123 152 offx Intest461 long-time threshold and tripping delay2 overload alarm (LED)3 short-time pick-up and tripping delay4 instantaneous pick-up5 fixing screw for long-time rating plug6 test connector.58

protection Micrologic 2.0long timecurrent setting (A) Ir = In x … 0.4 0.5 0.6 0.7 0.8 0.9 0.95 0.98 1tripping between 1.05 and 1.20 Irother ranges or disable by changing rating plugtime delay (s) accuracy 0 to -30% tr at 1.5 x Ir 12.5 25 50 100 200 300 400 500 600accuracy 0 to -20% tr at 6 x Ir 0.5 1 2 4 8 12 16 20 24accuracy 0 to -20% tr at 7.2 x Ir 0.34 0.69 1.38 2.7 5.5 8.3 11 13.8 16.6thermal memory20 minutes before and after trippinginstantaneouspick-up (A) Isd = Ir x … 1.5 2 2.5 3 4 5 6 8 10accuracy ± 10%time delayfixed: 20 msprotection Micrologic 5.0long timecurrent setting (A) Ir = In x … 0.4 0.5 0.6 0.7 0.8 0.9 0.95 0.98 1tripping between 1.05 and 1.20 Irother ranges or disable by changing rating plugtime delay (s) accuracy 0 to -30% tr at 1.5 x Ir 12.5 25 50 100 200 300 400 500 600accuracy 0 to -20% tr at 6 x Ir 0.5 1 2 4 8 12 16 20 24accuracy 0 to -20% tr at 7.2 x Ir 0.34 0.69 1.38 2.7 5.5 8.3 11 13.8 16.6thermal memory20 minutes before and after trippingshort timepick-up (A) Isd = Ir x … 1.5 2 2.5 3 4 5 6 8 10accuracy ± 10%time delay (ms) at 10 x Ir settings I 2 t Off 0 0.1 0.2 0.3 0.4I 2 t On 0.1 0.2 0.3 0.4tsd (max resettable time) 20 80 140 230 350tsd (max break time) 80 140 200 320 500instantaneouspick-up (A) Ii = In x … 2 3 4 6 8 10 12 15 offaccuracy ± 10%E88741E88742tIrtrIsd0 ItIrtrIsdtsdIi0 I59

6.2. Control unitscharacteristicsMicrologic A "ammeter"E88743Micrologic A control units protectpower circuits.They also offer measurements,display, communication and currentmaximeters. Version 6 providesearth-fault protection, version 7provides earth-leakage protection.10In short100 %Micrologic 6.0 ADt= IDn=tsd= tr=Isd=Ii= Ir=Ig=tg=MAXkA s911Protection settings .................................................Protection thresholds and delays are set using the adjustment dials.The selected values are momentarily displayed in amperes and in seconds.Overload protectionTrue rms long-time protection.Thermal memory: thermal image before and after tripping.Setting accuracy may be enhanced by limiting the setting range using a differentlong-time rating plug.The long-time rating plug "OFF" enables to cancel the overload protection.Short-circuit protectionShort-time (rms) and instantaneous protection.Selection of I 2 t type (ON or OFF) for short-time delay.Earth fault protectionResidual or source ground return.Selection of I 2 t type (ON or OFF) for delay.Residual earth-leakage protection (Vigi).Operation without an external power supply.d Protected against nuisance tripping.k DC-component withstand class A up to 10 A.Neutral protectionOn three-pole circuit breakers, neutral protection is not possible.On four-pole circuit breakers, neutral protection may be set using a threepositionswitch: neutral unprotected (4P 3t), neutral protection at 0.5 In (4P 3t + N/2), neutral protection at In (4P 4t).Zone selective interlocking (ZSI)A ZSI terminal block may be used to interconnect a number of control units toprovide total discrimination for short-time and earth-fault protection, without adelay before tripping.135.6.5.440 %menulong timeIr.7 .8 .9x In.95.981short timeIsdtsd(s) .4 .4 .32.5 3 4 56 .3 .22 8 .2 .11.5 10 .1on I 2 0x Irt offsettingdelayIgD E FC GB HA Jground faulttr(s)4 8 12162021.5@ 6 Ir 24tg(s) .4 .4 .3.3 .2.2 .1.1on I 2 0t offalarminstantaneousI i6 8 104 123 152 offx Intest121327468"Ammeter" measurements .................................... menuMicrologic A control units measure the true rms value of currents.A digital LCD screen continuously displays the most heavily loaded phase (Imax)or displays the I 1, I 2, I 3, I N, I g, I ∆n, stored-current (maximeter) and setting values bysuccessively pressing the navigation button.The optional external power supply makes it possible to display currents < 20% In.Communication optionIn conjunction with the COM communication option, the control unit transmits thefollowing:b setting valuesb all "ammeter" measurementsb tripping causesb maximeter reset.Note.Micrologic A control units come with a transparent lead-seal cover as standard.1 long-time current setting and tripping delay2 overload signal (LED)3 short-time pick-up and tripping delay4 instantaneous pick-up5 earth-leakage or earth-fault pick-up and tripping delay6 earth-leakage or earth-fault test button7 long-time rating plug screw8 test connector9 lamp test, reset and battery test10 indication of tripping cause11 digital display12 three-phase bargraph and ammeter13 navigation buttons.60

protectionsMicrologic 2.0 Along timecurrent setting (A) Ir = In x … 0.4 0.5 0.6 0.7 0.8 0.9 0.95 0.98 1tripping between 1.05 and 1.20 x Irother ranges or disable by changing rating plugtime delay (s) accuracy: 0 to -30 % tr at 1.5 x Ir 12.5 25 50 100 200 300 400 500 600accuracy: 0 to -20 % tr at 6 x Ir 0.5 1 2 4 8 12 16 20 24accuracy: 0 to -20 % tr at 7.2 x Ir 0.34 (1) 0.69 1.38 2.7 5.5 8.3 11 13.8 16.6thermal memory20 minutes before and after tripping(1) with tsd = 0.4 off, tr = 0.5 s.instantaneouspick-up (A) Isd = Ir x … 1.5 2 2.5 3 4 5 6 8 10accuracy: ±10 %time delayfixed: 20 msE88741tIrtrIsd0 IammeterMicrologic 2.0 Acontinuous current measurementsmeasurements from 20 to 200 % of In I 1 I 2 I3 INaccuracy: 1.5% (including sensors)no auxiliary source (where I > 20 % In)maximeters I1 max I2 max I3 max IN maxmenuprotectionMicrologic 5.0 / 6.0 / 7.0 Along timeMicrologic 5.0 / 6.0 / 7.0 Acurrent setting (A) Ir = In x … 0.4 0.5 0.6 0.7 0.8 0.9 0.95 0.98 1tripping between 1.05 and 1.20 x Irother ranges or disable by changing rating plugtime delay (s) accuracy: 0 to -30 % tr at 1.5 x Ir 12.5 25 50 100 200 300 400 500 600accuracy: 0 to -20 % tr at 6 x Ir 0.5 1 2 4 8 12 16 20 24accuracy: 0 to -20 % tr at 7.2 x Ir 0.34 0.69 1.38 2.7 5.5 8.3 11 13.8 16.6thermal memory20 minutes before and after trippingshort timepick-up (A) Isd = Ir x … 1.5 2 2.5 3 4 5 6 8 10accuracy: ±10 %time delay (ms) at 10 Ir settings I 2 t Off 0 0.1 0.2 0.3 0.4I 2 t On 0.1 0.2 0.3 0.4tsd (max resettable time) 20 80 140 230 350tsd (max break time) 80 140 200 320 500instantaneouspick-up (A) Ii = In x … 2 3 4 6 8 10 12 15 offaccuracy: ±10 %earth faultMicrologic 6.0 Apick up (A) Ig = In x … A B C D E F G H Jaccuracy: ±10 % In y 400 A 0.3 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1400 A < In y 1200 A 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1In > 1200 A 500 640 720 800 880 960 1040 1120 1200time delay (ms) settings I 2 t Off 0 0.1 0.2 0.3 0.4at In or 1200 A I 2 t On 0.1 0.2 0.3 0.4tg (max resettable time) 20 80 140 230 350tg (max break time) 80 140 200 320 500residual earth leakage (Vigi)Micrologic 7.0 Asensitivity (A) I∆n 0.5 1 2 3 5 7 10 20 30accuracy: 0 to -20 %time delay (ms.) settings 60 140 230 350 800t∆n (max resettable time) 80 140 230 350 800t∆n (max break time) 140 200 320 500 1000E88742E88744E88745tt0 ItIrIgtrIDntgIsdtDntsdIi0 II 2 t onI 2 t off0 IammeterMicrologic 5.0 / 6.0 / 7.0 Acontinuous current measurementsmeasurements from 20 to 200 % of In I 1 I 2 I3 IN I g I∆naccuracy: 1.5 % (including sensors)no auxiliary source (where I > 20 % In)maximeters I1 max I2 max I3 max IN max Ig max I∆n maxmenuNote:All current-based protection functions require no auxiliary source.The test / reset button resets maximeters, clears the tripping indication and teststhe battery.61

6.2. Control unitscharacteristicsMicrologic P "power"E887461011In shortMicrologic P control units include all thefunctions offered by Micrologic A.In addition, they measure voltages andcalculate power and energy values.They also offer new protection functionsbased on currents, voltages, frequencyand power reinforce load protection.Micrologic 6.0 PI(A)Trip2000A24s9Protection settings ........................................ + menuThe adjustable protection functions are identical to those of Micrologic A(overloads, short-circuits, earth-fault and earth-leakage protection).Double settingWithin the range determined by the adjustment dial, fine adjustment of thresholds(to within one ampere) and time delays (to within one second) is possible on thekeypad or remotely using the COM option.IDMTL settingCoordination with fuse-type or medium-voltage protection systems is optimisedby adjusting the slope of the overload-protection curve. This setting also ensuresbetter operation of this protection function with certain loads.Neutral protectionOn three-pole circuit breakers, neutral protection may be set using the keypad orremotely using the COM option, to one of four positions: neutral unprotected (4P3t), neutral protection at 0.5 In (4P 3t + N/2), neutral protection at In (4P 4t) andneutral protection at 2 In (4P 3t + 2N). Neutral protection at 2 In is used when theneutral conductor is twice the size of the phase conductors (major loadimbalance, high level of third order harmonics).On four-pole circuit breakers, neutral protection may be set using a threepositionswitch or the keypad: neutral unprotected (4P 3t), neutral protection at0.5 In (4P 3t + N/2), neutral protection at In (4P 4t). Neutral protection producesno effect if the long-time curve is set to one of the IDMTL protection settings.Programmable alarms and other protection ........20 kA0.4sOff13Depending on the thresholds and time delays set using the keypad or remotelyusing the COM option, the Micrologic P control unit monitors currents andvoltage, power, frequency and the phase sequence. Each threshold overrun issignalled remotely via the COM option. Each threshold overrun may be combinedwith tripping (protection) or an indication carried out by an optional M2C or M6Cprogrammable contact (alarm), or both (protection and alarm).12 141513165long timeIr.7 .8 .9.6.5.4x Inshort timeIsdground fault.95.9812.5 3 4 562 81.5 10x IrsettingIgD E FC GB HA Jtr(s)21.5tsd(s)4 8 121620@ 6 Ir 24.4 .4 .3.2.3.2.1on I 2 tdelay.10offtg(s) .4 .4 .3.3 .2.2 .1.1on I 2 0t offalarminstantaneousI i6 8 104 123 152 offx In1 long-time current setting and tripping delay2 overload signal (LED)3 short-time pick-up and tripping delay4 instantaneous pick-up5 earth-leakage or earth-fault pick-up and tripping delay6 earth-leakage or earth-fault test button7 long-time rating plug screw8 test connector9 lamp + battery test and indications reset10 indication of tripping cause11 high-resolution screen12 measurement display13 maintenance indicators14 protection settings15 navigation buttons16 hole for settings lockout pin on cover.test27468Load shedding and reconnection.........................Load shedding and reconnection parameters may be set according to the poweror the current flowing through the circuit breaker. Load shedding is carried out bya supervisor via the COM option or by an M2C or M6C programmable contact.Measurements ........................................................The Micrologic P control unit calculates in real time all the electrical values (V, A,W, VAR, VA, Wh, VARh, VAh, Hz), power factors and crest factors.The Micrologic P control unit also calculates demand current and demand powerover an adjustable time period. Each measurement is associated with a minimeterand a maximeter.In the event of tripping on a fault, the interrupted current is stored. The optionalexternal power supply makes it possible to display the value with the circuitbreaker open or not supplied.Note:Micrologic P control units come with a non-transparent lead-seal cover asstandard.62

Histories and maintenance indicators ..................The last ten trips and alarms are recorded in two separate history files.Maintenance indications (contact wear, operation cycles, etc.) are recorded forlocal access.Option de signalisation par contact programmablesThe M2C (two contacts) and M6C (six contacts) auxiliary contacts may be usedto signal threshold overruns or status changes. They can be programmed usingthe keypad on the Micrologic P control unit or remotely using the COM option.Communication option (COM)The communication option may be used to:b remotely read and set parameters for the protection functionsb transmit all the calculated indicators and measurementsb signal the causes of tripping and alarmsb consult the history files and the maintenance-indicator register.An event log and a maintenance register, stored in control-unit memory but notavailable locally, may be accessed in addition via the COM option.63

6.2. Control unitscharacteristicsMicrologic P "power"protection Micrologic 5.0 / 6.0 / 7.0 P +long time (rms)Micrologic 5.0 / 6.0 / 7.0 Pcurrent setting (A) Ir = In x … 0.4 0.5 0.6 0.7 0.8 0.9 0.95 0.98 1tripping between 1.05 and 1.20 x Irother ranges or disable by changing rating plugtime delay (s) accuracy: 0 to -30 % tr at 1.5 x Ir 12.5 25 50 100 200 300 400 500 600accuracy: 0 to -20 % tr at 6 x Ir 0.5 1 2 4 8 12 16 20 24accuracy: 0 to -20 % tr at 7.2 x Ir 0.34 (1) 0.69 1.38 2.7 5.5 8.3 11 13.8 16.6IDMTL setting curve slope SIT VIT EIT HVFuse DTthermal memory20 minutes before and after tripping(1) with tsd = 0.4 off, tr = 0.5 sshort time (rms)pick-up (A) Isd = Ir x … 1.5 2 2.5 3 4 5 6 8 10accuracy: ±10 %time delay (ms.) at 10 x Ir settings I 2 t Off 0 0.1 0.2 0.3 0.4I 2 t On 0.1 0.2 0.3 0.4tsd (max resettable time) 20 80 140 230 350tsd (max break time) 80 140 200 320 500instantaneouspick-up (A) Ii = In x … 2 3 4 6 8 10 12 15 OFFaccuracy: ±10 %earth faultMicrologic 6.0 Ppick-up (A) Ig = In x … A B C D E F G H Jaccuracy: ±10 % In y 400 A 0.3 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1400 A < In y 1200 A 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1In > 1200 A 500 640 720 800 880 960 1040 1120 1200time delay (ms.) settings I 2 t Off 0 0.1 0.2 0.3 0.4at In or 1200 A I 2 t On 0.1 0.2 0.3 0.4tg (max resettable time) 20 80 140 230 350tg (max break time) 80 140 200 320 500residual earth leakage (Vigi)Micrologic 7.0 Psensitivity (A) I∆n 0.5 1 2 3 5 7 10 20 30accuracy: 0 to -20 %time delay (ms.) settings 60 140 230 350 800t∆n (max resettable time) 60 140 230 350 800t∆n (max break time) 140 200 320 500 1000E88747E88744E88745t0ttIrIDMTLIgIDntrtgIsdtsd0 ItDn0 IIiI 2 t onI 2 t offIalarms and other protection Micrologic 5.0 / 6.0 / 7.0 Pcurrent threshold time delaycurrent imbalance Iimbalance 0.05 to 0.6 Imax 1 to 40 s.maximum demand current Imax demand: I1, I2, I3, IN, Ig 0.4 In at short-time pick-up 0 to 1500 s.voltagevoltage imbalance Uimbalance 0.02 to 0.3 Uaverage 1 to 40 s.minimum voltage Umin 60 to 690 V between phases 0.2 to 5 s.maximum voltage Umax 100 to 930 V between phases 0.2 to 5 s.powerreverse power rP 5 to 500 kW 0.2 to 20 s.frequencyminimum frequency Fmin 45 to 400 Hz 0.2 to 5 s.maximum frequency Fmax 45 to 540 Hz 0.2 to 5 s.phase sequencesequence ∆Ø Ø1/2/3 or Ø1/3/2 instantaneousE88748Etthresholdthresholddelaydelay0 I/U/P/Fload shedding and reconnectionMicrologic 5.0 / 6.0 / 7.0 Pmeasured value threshold time delaycurrent I 0.5 to 1 Ir per phases 20% tr to 80% tr.power P 200 kW to 10 MW 10 to 3600 s.E88749Etthresholdthresholddelaydelay0 I/PNote:All current-based protection functions require no auxiliary source.Voltage-based protection functions are connected to AC power via a voltagemeasurement input built into the circuit breaker.64

E88750E88752Default display.Display of a voltage.E88751E88753Display of a maximumcurrent .Display of a power.Navigation from one display to another is intuitive. The six buttons on the keypadprovide access to the menus and easy selection of values. When the settingcover is closed, the keypad may no longer be used to access the protectionsettings, but still provides access to the displays for measurements, histories,indicators, etc.Measurements ........................................................Instantaneous valuesThe value displayed on the screen is refreshed every second.Minimum and maximum values of measurements are stored in memory(minimeters and maximeters).currentsI rms A 1 2 3 NA e-fault e-leakageI max rms A 1 2 3 NA e-fault e-leakagevoltagesU rms V 12 23 31V rms V 1N 2N 3NU average rms V (U12 + U23 + U31) / 3U imbalance %power, energyP active, Q reactive, S apparent W, Var, VA totalsE active, E reactive, E apparent Wh, VARh, VAh totals consumed - suppliedtotals consumedtotals suppliedpower factory PF totalfrequenciesFHzE88754E88756Display of a frequency.Display of a tripping history.E88755E88757Display of a demand power.Display after tripping.Demand meteringThe demand is calculated over a fixed or sliding time window that may beprogrammed from 5 to 60 minutes. According to the contract signed with thepower supplier, an indicator associated with a load shedding function makes itpossible to avoid or minimise the costs of overrunning the subscribed power.Maximum demand values are systematically stored and time stamped(maximeter).currentsI demand A 1 2 3 NA e-fault e-leakageI max demand A 1 2 3 NA e-fault e-leakagepowerP, Q, S demand W, Var, VA totalsP, Q, S max demand W, Var, VA totalsMinimeters and maximetersOnly the current and power maximeters may be displayed on the screen.Histories ..................................................................The last ten trips and alarms are recorded in two separate history files that maybe displayed on the screen.b tripping history:v type of faultv date and timev values measured at the time of tripping (interrupted current, etc.).b alarm history:v type of faultv date and timev values measured at the time of the alarm.Maintenance indicators..........................................A number of maintenance indicators may be called up on the screen:b contact wearb operation counter:v cumulative totalv total since last reset.65

6.2. Control unitscharacteristicsMicrologic P "power"E88762POWERLOGIC System Manager DemoFile Edit View Setup Control Display ToolsReports Window HelpSampling Mode : MANUAL5 secondsWith the communication optionTimeEventModuleAdditional measurements, maximeters and minimetersCertain measured or calculated values are only accessible with the COMcommunication option:b I peak/2, (I 1+ I 2+ I 3)/3, I imbalanceb load level in % Irb total power factorThe maximeters and minimeters are available only via the COM option for usewith a supervisor.ReadyONLINE: DEMO No working system 9:30Display of an event log on a supervisor.Event logAll events are time stamped.b tripsb beginning and end of alarmsb modifications to settings and parametersb counter resetsb system faults:v fallback positionv thermal self-protectionb loss of timeb overrun of wear indicatorsb test-kit connectionsb etc.Maintenance registerUsed as an aid in troubleshooting and to better plan for device maintenanceoperations.b highest current measuredb operation counterb number of test-kit connectionsb number of trips in operating mode and in test modeb contact-wear indicator.Additional technical characteristicsSetting the display languageSystem messages may be displayed in six different languages. The desiredlanguage is selected via the keypad.Protection functionsAll current-based protection functions require no auxiliary source. Voltage-basedprotection functions are connected to AC power via a voltage measurement inputbuilt into the circuit breaker.Measurement functionsMeasurement functions are independent of the protection functions.The high-accuracy measurement module operates independently of theprotection module, while remaining synchronised with protection events.Measurement-calculation modeb measurement functions implement the new "zero blind time" concept whichconsists in continuously measuring signals at a high sampling rate. The traditional"blind window" used to process samples no longer exists. This method ensuresaccurate energy calculations even for highly variable loads (welding machines,robots, etc.).b energies are calculated on the basis of the instantaneous power values, in twomanners:v the traditional mode where only positive (consumed) energies are consideredv the signed mode where the positive (consumed) and negative (supplied)energies are considered separately.66

Accuracy of measurements (including sensors)cvoltage (V) 1%b current (A) 1.5%b frequency (Hz) 0.1 Hzb power (W) and energy (Wh) 2.5%Stored informationThe fine setting adjustments, the last 100 events and the maintenance registerremain in the control-unit memory even when power is lost.Time-stampingTime-stamping is activated only if an external power supply module is present(max. drift of 1 hour per year).ResetAn individual reset, via the keypad or remotely, acts on alarms, minimum andmaximum data, peak values, the counters and the indicators.67

6.2. Control unitscharacteristicsMicrologic H "harmonics"E88759Micrologic H control units include all thefunctions offered by Micrologic P.Integrating significantly enhancedcalculation and memory functions, theMicrologic H control unit offers in-depthanalysis of power quality and detailedevent diagnostics. It is intended foroperation with a supervisor.long timeIr.7 .8 .9.6.5.4Ix InMicrologic 7.0 HUPE.95.981tr(s)4 8 12162021.5@ 6 Ir 24(A)(V)(kW)(kWh)Harmonicsalarmshort timeinstantaneousIsdtsdI i(s) .4 .4 .32.5 3 4 6 568 10.3 .2 4 122 8 .2 .1 3 151.5 10 .1on I 2 0 2 offx Irt off x InsettingdelaytestIÐn Ðt(A)3 5 (ms)7 230 3502 101401 20.5 30 60 800earth leakageIn shortIn addition to the Micrologic P functions, the Micrologic H control unitoffers:b in-depth analysis of power quality including calculation of harmonics and thefundamentalsb diagnostics aid and event analysis through waveform captureb enhanced alarm programming to analyse and track down a disturbance on theAC power system.Measurements ........................................................The Micrologic H control unit offers all the measurements carried out byMicrologic P, with in addition:b phase by phase measurements of:v power, energyv power factorsb calculation of:v current and voltage total harmonic distortion (THD)v current, voltage and power fundamentals (50 Hz)v current and voltage harmonics up to the 31st order.Instantaneous values displayed on the screencurrentsI rms A 1 2 3 NA e-fault e-leakageI max rms A 1 2 3 NA e-fault e-leakagevoltagesU rms V 12 23 31V rms V 1N 2N 3NU average rms V (U12 + U23 + U31) / 3U imbalance %power, energyP active, Q reactive, S apparent W, Var, VA totals 1 2 3E active, E reactive, E apparent Wh, VARh, VAh totals consumed - suppliedtotals consumedtotals suppliedpower factor PF total 1 2 3frequenciesFHzpower-quality indicatorstotal fundamentals U I P Q STHD % U IU and I harmonics amplitude 3 5 7 9 11 13Harmonics 3, 5, 7, 9, 11 and 13, monitored by electrical utilities, are displayed on the screen.Demand measurementsSimilar to the Micrologic P control unit, the demand values are calculated over afixed or sliding time window that may be set from 5 to 60 minutes.currentsI demand A 1 2 3 NA e-fault e-leakageI max demand A 1 2 3 NA e-fault e-leakagepowerP, Q, S demand W, Var, VA totalsP, Q, S max demand W, Var, VA totalsMaximetersOnly the current maximeters may be displayed on the screen.Histories and maintenance indicatorsThese functions are identical to those of the Micrologic P.Note:Micrologic H control units come with a non-transparent lead-seal cover asstandard.68

E88760POWERLOGIC System Manager DemoFile Edit View Setup Control Display ToolsReports Window HelpTimeEventSampling Mode : MANUALPhase A-N Voltage - Harmonics Analysis5 secondsModuleWith the communication optionE88761% FundamentalReady1,201,000,800,600,400,200,00H2 H3 H4 H5 H6 H7 H8 H9 H10 H11 H12Display of harmonics up to 12th order.ReadyWaveform capture.HarmonicsFundamental:RMS:RMS-H:Peak:CF:THD:Phase 1-NHarmonics(RMS)H1: 118.09H2: 0.01H3: 0.45H4: 0.03H5: 0.45H6: 0.04H7: 1.27H8: 0.05H9: 0.42H10: 0.01H11: 1.03H12: 0.07ONLINE: DEMO No working system 9:30POWERLOGIC System Manager DemoFile Edit View Setup Control Display ToolsReports Window Help167830-83-167167830-83-167Phase A-N Voltage17 33 50 66Phase B-N Voltage17 33 50Sampling Mode : MANUAL6423210-321ONLINE: DEMO No working system 9:30OK5 secondsPhase A Current17 33 50Your Specific Device - Phase A-N Voltage-642Fundamental: 118.08RMS: 118.11RMS-H: 2.38Peak: 166.86CF: 1.41THD: 2.02OKHarmonics(RMS)H1: 118.09H2: 0.01H3: 0.45H4: 0.03H5: 0.45H6: 0.04H7: 1.27H8: 0.05H9: 0.42H10: 0.01H11: 1.03H12: 0.0766Additional measurements, maximeters and minimetersCertain measured or calculated values are only accessible with the COMcommunication option:b I peak/ 2, (I 1+ I 2+ I 3)/3, I imbalanceb load level in % Irb power factor (total and per phase)b voltage and current THDb K factors of currents and average K factorb crest factors of currents and voltagesb all the fundamentals per phaseb fundamental current and voltage phase displacementb distortion power and distortion factor phase by phaseb amplitude and displacement of current and voltage harmonics 3 to 31.The maximeters and minimeters are available only via the COM option for usewith a supervisor.Waveform captureThe Micrologic H control unit stores the last 4 cycles of each instantaneouscurrent or voltage measurement. On request or automatically on programmedevents, the control unit stores the waveforms. The waveforms may be displayedin the form of oscillograms by a supervisor via the COM option.Enhanced alarm programmingEach instantaneous value can be compared to user-set high and low thresholds.Overrun of a threshold generates an alarm. An alarm or combinations of alarmscan be linked to programmable actions, including circuit-breaker opening,activation of a M2C or M6C contact, selective recording of measurements in alog, waveform capture, etc.Event log and maintenance registersThe Micrologic H offers the same event log and maintenance register functionsas the Micrologic P.Additional technical characteristicsE88762POWERLOGIC System Manager DemoFile Edit View Setup Control Display ToolsReports Window HelpSampling Mode : MANUAL5 secondsSetting the display languageSystem messages may be displayed in six different languages. The desiredlanguage is selected via the keypad.TimeEventModuleProtection functionsAll current-based protection functions require no auxiliary source. Voltage-basedprotection functions are connected to AC power via a voltage measurement inputbuilt into the circuit breaker.Measurement functionsMeasurement functions are independent of the protection functions.The high-accuracy measurement module operates independently of theprotection module, while remaining synchronised with protection events.ReadyLog.ONLINE: DEMO No working system 9:30Measurement-calculation modeAn analogue calculation function dedicated to measurements enhances theaccuracy of harmonic calculations and the power-quality indicators. TheMicrologic H control unit calculates electrical magnitudes using 1.5 x In dynamics(20 x In for Micrologic P).Measurement functions implement the new "zero blind time" conceptEnergies are calculated on the basis of the instantaneous power values, in thetraditional and signed modes.Harmonic components are calculated using the discrete Fourier transform(DFT).69

6.2. Control unitscharacteristicsMicrologic H "harmonics"Accuracy of measurements (including sensors)cvoltage (V) 1%b current (A) 1.5%b frequency (Hz) 0.1 Hzb power (W) and energy (Wh) 2.5%b total harmonic distortion 1%Stored informationThe fine-setting adjustments, the last 100 events and the maintenance registerremain in the control-unit memory even when power is lost.Time-stampingTime-stamping is activated only if an external power supply module is present(max. drift of 1 hour per year).ResetAn individual reset, via the keypad or remotely, acts on alarms, minimum andmaximum data, peak values, the counters and the indicators.70

6.3. CommunicationcharacteristicsCompact NS100 to 630053172siIn shortIntegration of the circuit breaker or theswitch-disconnector in a supervisonsystem requires either the communicatingauxiliaries or the SC150 interface.Compact devices fit perfectly in the SMSPowerlogic electrical installationmanagement system by communicatingusing Digipact protocols. An externalgateway offers communication via othernetworks including:b Profibusb Ethernet…There are two possibilities for the 100 to 630 A range:b communicating auxiliariesThey replace the standard auxiliaries and connect directly to the Digipact bus.Three equipment levels:v communicating auxiliary contacts, comprising:- OF (on/off), SD (trip indication) and SDE (fault-trip indication) contacts- electronic module- prefabricated wiring.v communicating auxiliary contacts and motor-mechanism module, comprising:- OF (on/off), SD (trip indication) and SDE (fault-trip indication) contacts- motor-mechanism module (220 V AC) (1)- electronic module- prefabricated wiring.v communicating carriage switches for the chassis, comprising:- CE / CD (connected/disconnected position) contacts- electronic module- wiring connector.b SC150 interfaceUsing the SC150 interface, it is possible to integrate a device equipped with noncommunicatingauxiliaries into a supervison system.The SC150 interface is used to connect:v the auxiliary contacts on the circuit breaker (OF, SD, SDE, SDV, CD, CE)v the remote-operation system (on, off, reset)v the communication output for the STR53UE and STR43ME electronic trip unitsequipped with the COM optionv an unassigned digital input.054481si054516siCompact NS equipped with communicating auxiliary contactsand motor-mechanism module.Withdrawable Compact NS on its chassis equipped withcommunicating auxiliary contacts.Compact withcommunicating SC150auxiliariesdevice identificationaddress b brating - -indication of status conditionsOF (on/off) b bSD (trip indication) b bSDE (fault-trip indication) b bCE/CD (connected/disconnected position) b bcontrolsON/OFF b bLED reset b bprotection settingsReading of the protection settingsoperating and maintenance aidsMeasurements:currentsbFault readings:type of faultbIndications:operation counter b b(1) For voltages other than 220 V AC, use a standard motor-mechanism module (noncommunicating)together with an SC150 indication and control interface.bSC150 indication and control interface.71

CTCDCE6.3. CommunicationcharacteristicsMasterpact NT / NW056431siIn shortThe COM option is required forintegration of the circuit breaker or switchdisconnectorin a supervision system.Masterpact uses the Digipact or Modbuscommunications protocol for fullcompatibility with the SMS PowerLogicelectrical-installation managementsystems. An external gateway is availablefor communication on other networks:b Profibusb Ethernet…Digipact "device"communication module.For fixed devices, the COM option is made up of:b a "device" communication module, installed behind the Micrologic control unitand supplied with its set of sensors (OF, SDE ,PF and CH micro-contacts) andits kit for connection to XF and MX communicating voltage releases.For drawout devices, the COM option is made up of:b a "device" communication module, installed behind the Micrologic control unitand supplied with its set of sensors (OF, SDE, PF and CH micro-contacts) andits kit for connection to XF and MX communicating voltage releasesb a "chassis" communication module supplied separately with its set of sensors(CE, CD and CT contacts).Status indication by the COM option is independent of the device indicationcontacts. These contacts remain available for conventional uses.Digipact or Modbus "Device" communication moduleThis module is independent of the control unit. It receives and transmitsinformation on the communication network. An infra-red link transmits databetween the control unit and the communication module.Consumption: 30 mA, 24 V.Digipact or Modbus "chassis" communication moduleThis module is independent of the control unit. With Modbus "chassis"communication module, this module makes it possible to address the chassisand to maintain the address when the circuit breaker is in the disconnectedposition.Consumption: 30 mA, 24 V.XF and MX communicating voltage releasesThe XF and MX communicating voltage releases are equipped for connection tothe "device" communication module.The remote-tripping function (second MX or MN) are independent of thecommunication option. They are not equipped for connection to the "device"communication module.056401siDigipact "chassis"communication module.E88758Ecommunicationbus2CCM modbus+ ++OFSDEPFCHCDCCTMXXFCE45056431siModbus "device"communication module.13E45183siModbus "chassis"communication module.1 "Device" communication module : hard wire2 "Chassis" communication module : communication bus3 OF, SDE, PF and CH "device" sensors4 CE, CD and CT "chassis" sensors5 MX and XF release.Note:Eco COM is limited to the transmission of metering data and does not allow thecontrol of the circuit breaker.72

E88760POWERLOGIC System Manager DemoFile Edit View Setup Control Display ToolsReports Window HelpTime% FundamentalReady1,201,000,800,600,400,200,00EventSampling Mode : MANUALPhase A-N Voltage - Harmonics Analysis5 secondsModuleH2 H3 H4 H5 H6 H7 H8 H9 H10 H11 H12HarmonicsFundamental:RMS:RMS-H:Peak:CF:THD:Phase 1-NHarmonics(RMS)H1: 118.09H2: 0.01H3: 0.45H4: 0.03H5: 0.45H6: 0.04H7: 1.27H8: 0.05H9: 0.42H10: 0.01H11: 1.03H12: 0.07ONLINE: DEMO No working system 9:30OKOverview of functionsThe Masterpact circuit breakers and switch-disconnectors are compatible withthe Digipact or Modbus COM option.The COM option may be used with all types of control units to:b identify the deviceb indicate status conditionsb control the device.Depending on the different types of Micrologic (A, P, H) control units, the COMoption also offers:b setting of the protection and alarms functionsb analysis of the AC-power parameters for operating-assistance andmaintenance purposes.switch-disconnectorcircuit breaker withwith communic. bus communication busDigipact Modbus Digipact Modbusdevice identificationaddress b b A P H A P Hcalibre - - A P H A P Htype of device - - P Htype of control unit - - A P H A P Htype of long-time rating plug - - A P H A P Hstatus indicationsON/OFF OF b b A P H A P Hspring charged CH b b A P H A P Hready to close PF b b A P H A P Hfault-trip SDE - - A P H A P Hconnected/disconnected/test b b A P H A P Hposition CE/CD/CTcontrolsON/OFF MX/XF b b A P H A P Hspring charging - -reset of the mechanical - -indicatorprotections and alarms settingsreading of protections settings A P H A P Hwriting of fine settings in the range P Himposed by the adjustment dialsreading/writing of alarms (délestage, relestage, M2C…) P Hreading/writing of alarms personnalisablesHoperating and maintenance aidsmeasurement:current A P H A P Hvoltages, frequency, power, etc. P H P Hpower quality: fundamental, harmonicsHprogramming of demand metering P Hfault readings:type of fault A P Hinterrupted current P Hwaveform capture:on faultsHon demand or programmedHhistories and logs:trip history P Halarm history P Hevent logs P Hindicators:counter operation A P H A P Hcontact wear P Hmaintenance register P HNote:See the description of the Micrologic control units for further details on protectionand alarms, measurements, waveform capture, histories, logs and maintenanceindicators.73

CD3 CD2 CD1CE6 CE5 CE4CD3 CD2 CD1834 824 814832 8 2 812831 821 8 1M2C/M6CE5 E6 Z5 M1 M2 M3 F2 + V3E3 E4 Z3 Z4 T3 T4 VN V2E1 E2 Z1 Z2 T1 T2 F1 - V1484/ 184/474/Q3 K2471/ 181/Q2Q1 K1CE3 CE2 CE1MN/MX2 MX1 XF PF84 34 324 314D2/ 254182 82 32 3 2 312/C1281 31 321 3 1D1/ CC131ResetMicrologic 70Ir Isd Ig Ap resetI i I01253MCH25251C2 A2B2C3 A3B3C1 A1B1OF24 OF23 OF 2 OF21 OF14 OF13 OF12 OF 1 OF4 OF3 OF2 OF1 CT3 CT2 CT12 4 234 24 214 1 4 134 124 1434 24 14 934 924 91424 23 21 142 132 1 2 12 42 3212 932 9 2 912241 231 21 2 1 141 131 121 1 41 31 21 1 931 921 911Testvoletsshu tersNX 32 H 2(V) (kA)Ue Icu20/ 40525 1 0690 85cat.B Icw 85kA/1sIcs = 1 0% IcuIEC 947-2 50/60HzEN 60947-2UTE VDE BS CEI UNE AS NEMApulsar SVOKe rorN°1 N°1com24VBuscome rorJBus5 0/52560/690250cat AIEC947-2compactUeIcu(V) (kA)20/240380/415401085Ics=1 0% IcuIEC947-21.9.8x 250ApushtotripImx 250A10 5125/1609687IrImcompactNS250 LUi 750V. Uimp8kV.Icu(kA)1501501307020250 1 0cat AIcs = 1 0% Icu250A/40°CIEC 947-2 UTE VDEBS CEI UNE NEMAÆ5 .812CD3 CD2 CD1CE6 CE5 CE4CD3 CD2 CD1834 824 814832 8 2 812831 821 8 1M2C/M6CE5 E6 Z5 M1 M2 M3 F2 + V3E3 E4 Z3 Z4 T3 T4 VN V2E1 E2 Z1 Z2 T1 T2 F1 - V1484/ 184/474/471/Q3181/K2Q2Q1 K1CE3 CE2 CE1MN/MX2 MX1 XF PF84 34 324 314D2/ 254182 82 32 3 2 312/81 31 321 3 1D1/C12CC131ResetMicrologic 70Ir Isd Ig Ap resetI i I01253MCH25251C2 A2B2C3 A3B3C1 A1B1OF24 OF23 OF 2 OF21 OF14 OF13 OF12 OF 1 OF4 OF3 OF2 OF1 CT3 CT2 CT12 4 234 24 214 1 4 134 124 1434 24 14 934 924 91424 23 21 142 132 1 2 12 42 32 22 12 932 9 2 912241 231 21 2 1 141 131 121 1 41 31 21 1 931 921 9 1Testvoletsshu tersNX 32 H 2(V) (kA)Ue Icu20/ 40525 1 0690 85cat.B Icw 85kA/1sIcs = 1 0% IcuIEC 947-2 50/60HzEN 60947-2UTE VDE BS CEI UNE AS NEMA5 0/52560/690250cat AIEC947-2compactUeIcu(V) (kA)20/240380/415401085Ics=1 0% IcuIEC947-21.9.8x 250ApushtotripImx 250A10 5125/1609687IrImcompactNS250 LUi 750V. Uimp8kV.Icu(kA)1501501307020250 1 0cat AIcs = 1 0% Icu250A/40°CIEC 947-2 UTE VDEBS CEI UNE NEMAÆ5 .8126.3. CommunicationcharacteristicsMasterpact, Compact NSin a communication networkE88763ESoftwareCommunicationinterfaceRS 232C,EthernetRS 485CommunicationBusMERLIN GERIN1 3Data concentratorDC150DeviceOC24 OC23 OC 2 OC21 OC14 OC13 OC12Com UC1 UC2 UC3 UC4 M2C UC2 SDE2 CE3 CE2 CE1 MN MX1 XF PF MCH OF24 OF23 OF 2 OF21 OF14 OF13 OF12 OF 1Com UC1 UC2 UC3 UC4 SDE1OC24 OC23 OC 2 OC21 OC14 OC13 OC12Com UC1 UC2 UC3 UC4 M2C UC2 SDE2 CE3 CE2 CE1 MN MX1 XF PF MCH OF24 OF23 OF 2 OF21 OF14 OF13 OF12 OF 1Com UC1 UC2 UC3 UC4 SDE1push O F push ONO O F dischargedNB250NHUi 750V. Uimp 8kV.1 0706550UTE VDE BS CEI UNE NEMAUe(V)20/240380/415405 06 0/690Ir TM 250 Dmanu autoOpush O FO O F dischargedIpush ONpush O F push ONO O F dischargedNB250NHUi 750V. Uimp 8kV.1 0706550UTE VDE BS CEI UNE NEMAUe(V)20/240380/415405 06 0/690TM 250 DIrmanu autoOpush O FO O F dischargedIpush ONDigipact BusMasterpactCompact NSMasterpactCompact NSModBUS BusDevicesCircuit breakers equipped with Micrologic control units may be connected toeither a Digipact or Modbus communication bus. The information made availabledepends on the type of Micrologic control unit (S, A) and on the type ofcommunication bus (Digipact or Modbus).Switch-disconnectors may be connected exclusively to the Digipactcommunication bus.Communication busDigipact busThe Digipact bus is the internal bus of the low-voltage switchboard in which theDigipact communicating devices are installed (with Digipact COM, PM150,SC150, UA150, etc.). This bus must be equipped with a DC150 data concentrator(see the Powerlogic System catalogue).AddressesAddressing is carried out by the DC150 data concentrator.Number of devicesThe maximum number of devices that may be connected to the Digipact bus iscalculated in terms of "communication points". These points correspond to theamount of traffic the bus can handle. The total number of points for the variousdevices connected to a single bus must not exceed 100.If the required devices represent more than 100 points, add a second Digipactinternal bus.Communicating device Number of pointsDC150 data concentrator 4Micrologic + Digipact COM 4PM150 4SC150 4UA150 4Length of busThe maximum recommended length for the Digipact internal bus is 200 meters.Bus power sourcePower is supplied by the DC150 data concentrator (24 V).74

Modbus busThe Modbus RS485 (JBus) system is an open bus on which communicatingModbus devices (Compact with Modbus COM, PM300, Sepam, Vigilohm, etc.) areinstalled. All types of PLCs and microcomputers may be connected to the bus.AddressesThe software layer of the Modbus protocol can manage up to 255 addresses(1 to 255).The "device" communication module comprises three addresses linked to:b circuit-breaker manager;b measurement manager;b protection manager.The "chassis" communication module comprises one address linked to:b the chassis manager.The division of the system into four managers secures data exchange with thesupervision system and the circuit-breaker actuators.The manager addresses are automatically derived from the circuit-breakeraddress @xx entered via the Micrologic control unit (the default address is 47).logic addresses@xx Circuit-breaker manager (1 to 47)@xx + 50 Chassis manager (51 to 97)@xx + 200 Measurement managers (201 to 247)@xx + 100 Protection manager (101 to 147)Number of devicesThe maximum number of devices that may be connected to the Modbus busdepends on the type of device (Compact with Modbus COM, PM300, Sepam,Vigilohm, etc.), the baud rate (19200 is recommended), the volume of dataexchanged and the desired response time. The RS485 physical layer offers up to32 connection points on the bus (1 master, 31 slaves).A fixed device requires only one connection point (communication module on thedevice).A drawout device uses two connection points (communication modules on thedevice and on the chassis).The number must never exceed 31 fixed devices or 15 drawout devices.Length of busThe maximum recommended length for the Modbus bus is 1200 meters.Bus power sourceA 24 V DC power supply is required (less than 20% ripple, insulation class II).Communication interfaceThe Modbus bus may be connected to the central processing device in any ofthree manners:b direct link to a PLC. The communication interface is not required if the PLC isequipped with a Modbus port;b direct link to a computer. The Modbus (RS485) / Serial port (RS232)communication interface is required;b connection to a TCP/IP (Ethernet) network. The Modbus (RS485) / TCP/IP(Ethernet) communication interface is required.SoftwareTo make use of the information provided by the communicating devices, softwarewith a Modbus driver must be used.Micrologic utilitiesThis is a set of Modbus drivers that may be used with a PC to:b display the variables (I, U, P, E, etc.) with the RDU (Remote Display Utility)b read/write the settings with the RSU (Remote Setting Utility)b remotely control (ON / OFF) the device with the RCU (Remote Control Utility)These utilities are available on request.75

6.3. Caractéristiquesde la communicationMasterpact, Compact NSdans le réseau de communicationSystem Manager Software (SMS)SMS is a power management software for the control and monitoring of LV andMV electrical installations.The SMS family includes a number of products for all types of applications, fromstandalone systems to networked power management of multiple buildings.SMS can communicate with all intelligent devices of the electrical installationincluding:b Power Meter and Circuit Monitor productsb LV circuit breakers and switch-disconnectorsb Sepam units.76

Schneider Electric Industries SA5, rue Nadar92506 Rueil MalmaisonCedex FranceTel : +33 (0)1 41 29 82 00Fax : +33 (0)1 47 51 80 20As standards and design change from time to time, always ask for confirmation of theinformation given in this publication.This document was printed on ecological paper.© 2001 Schneider Electric - All rights reservedhttp://www.schneiderelectric.comPublished by: Schneider ElectricDesign and layout by: AMEGPrinted by:DBTP172GUI/EN11/2001