Analogue instruments - Circutor

Analogue instrumentsBidirectionalprotectionwattmetersAnalogue indicator to measurethree-phase currentDescriptionFeaturesElectronic instrument on the front panel(96x96) used to protect generators againstoverloads and inverse power. The instrumentis composed of a power converter withan analogue output connected to the needleindicator with 2 relays. The unit measuresand indicates the system's power constantly(measurement in 4 quadrants), sending analarm signal when the power exceeds the settrip values. The alarm is indicated by activatingthe output relays. The two LEDS on thefront panel can be used to view the status ofoutput relays. The scale is exchangeable.Input circuitNominal current I nCurrent measurementrangeCurrent overloadImpedanceAuxiliary power supplyNominal value in ACFrequencyConsumptionNominal value in DCConsumptionPGR0 ... 20 mA dc0 ... 130 % I n5 I npermanent3 Ω115 / 230 / 400 V40 ... 80 Hz2.5 V·A9-18 / 18-36 / 36-72 / 90-140 V2.5 V·AApplication}}The instrument has two independent relays:an overload and an inverse power relay.Overload protectionThe protection has these characteristics:}}Trip point adjustable between 0 and 100%of the scale base power}}Hysteresis adjustable between 1 and 50%of the scale base}}Delay adjustable between 0 and 30 s}}Inverse power protection. With variousgenerators connected in parallel, one canstart consuming power and working as amotor, under determined situations ("motorization").The relay is activated when the circumstancesare met.The protection system has the followingcharacteristics:Trip point adjustable between0 and 20% of the scale base power}}Delay is adjustable between 0 and 30 s.}}Relay interlocking* (latch): when theAmbient conditionsOperating temperature +5 ... +55 ºCLimit temperature - 25 ... +70 ºCAltitude2000 mBuild featuresDimensions (mm) 96 x 96 x 77.2Weight (g) 435Type of boxDegree of protection:Front panelTerminalsDIN railIP 52IP 20Standards BS 89, EN 60051, IEC 144, UL 94, DIN 43780, IEC 51, UNE 21318alarm condition is met, the relay is activateduntil the instrument's auxiliary power supplyis not shut down (even when the alarm conditionsdisappear)}}Fault security: the relay bypass positionis the same as when the alarm is triggered.Therefore, when the auxiliary power supplyis shut down, the unit sends an alarm.*: The system can be supplied with no relayinterlocking (latch), on demand.M1-48