Emax Low voltage air circuit-breakers - ABB Download Center

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Example of selection of earth fault protection devices and theirrelevant settings.Switchboard A1600 kVA20 / 0,4 kVE3N25 with PR122In = 2500 AI4 = 0.25 x In = 625 At4 = 0.8 s (t=k)E1N12 with PR121In = 1000 AI4 = 0.2 x In = 200 At4 = 0.4 s (t = k)Switchboard BT4N320 with RC222In = 320 AT2N160 with RC221In = 100 AI Δn = 5 mAt Δn = 0.2 sI Δn = 0.1 mAt Δn = 0 s1SDC200199F00016ABB SACE 6/21
Earth fault protectionUse of the toroid on the star center of thetransformerIn the case of circuit-breakersto protect MV/LV transformers,it is possible to install a toroidon the conductor connectingthe star centre of the transformerto earth (application allowedwith the SACE Emax seriesfitted with the PR122 andPR123 electronic trip units.This detects the earth fault current.The figure beside shows theoperating principle of the toroidinstalled on the star centreof the transformer.The use of this accessory allowsthe protection thresholdagainst earth fault (function G)to be independent of the sizeof the primary current transformers installed on the circuitbreakerphases. For the technical characteristics of the toroidsee the table at page 6/24.PR122 - PR1231SDC200200F00016Double GThe Emax type circuit-breakers, equipped with the PR123 electronictrip unit, allow two independent curves for protection G:one for the internal protection (function G without external toroid)and one for the external protection (function G with externaltoroid, as described in the above paragraph).A typical application of function double G consists in simultaneousprotection both against earth fault of the secondary ofthe transformer and of its connection cables to the circuit-breakerterminals (restricted earth fault protection), as well as againstearth faults on the load side of the circuit-breaker (outside therestricted earth fault protection).ExampleFigure 1 shows a fault on theload side of an Emax circuitbreaker:the fault current flowsthrough one phase only and,if the vectorial sum of the currentsdetected by the four currenttransformers (CTs) is to behigher than the set threshold,the electronic trip unit activatesfunction G (and the circuit-breakertrips).ExternaltoroidTransformersecondary windingEmaxInternal CTsFigure 11SDC200323F00016/22ABB SACE
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Main characteristicsRangesInstallat
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The new Emax range shines like a li
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Careful selection of materials, met
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Overview of the SACE Emax familyFie
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Construction characteristicsStructu
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Construction characteristicsOperati
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Construction characteristicsUtiliza
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Electronic trip unitsGeneral charac
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Electronic trip unitsVersions avail
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Compliance with StandardsStandards,
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The RangesContentsSACE Emax automat
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1SDC200078F00011SDC200079F00011SDC2
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Switch-disconnectors1SDC200060F0001
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Switch-disconnectors for applicatio
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Sectionalizing truckSectionalizing
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Earthing truckOther versionsEarthin
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Installation in switchgearModular d
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Installation in switchgearChoosing
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Installation in switchgearCurrent-c
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Changing the rated uninterrupted cu
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Changing the rated uninterrupted cu
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Derating at different altitudesSACE
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Current-limiting and specific let-t
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Overcurrent releases andrelated acc
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Operation and protection functionsP
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Versions availableThe following ver
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Functions L-I1SDC200100F00014Functi
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Protection trip units and trip curv
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Zone 3 Zone 2 Zone 1Phase unbalance
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Example of events indicated by the
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Measurement functionThe current mea
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Additional Protection functions and
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Functions L-S-It = k1SDC200111F0001
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Function Gt =kI 2t = k1SDC200112F00
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Function RVRV1SDC200125F00014Functi
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Notes:(1) In accordance also with I
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Protection functions and setting va
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Functions L-S-It =kI 21SDC200110F00
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Function LAccording to IEC 60225-3k
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Function UVUV1SDC200123F00014Functi
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Accessories for protection trip uni
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1SDC200129F0001SACE PR010/T configu
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• SD030 AO: the device acquires d
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Circuit-breakers with communication
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Measurement, signalling and availab
Page 100 and 101: Complete control of the installatio
Page 104 and 105: AccessoriesContentsFunctions of the
Page 106 and 107: Accessories supplied as standardThe
Page 108 and 109: Switch-disconnectorsSwitch-disconne
Page 110 and 111: 1SDC200135F00011b) SOR Test UnitThe
Page 112 and 113: 1SDC200138F00012b) Time-delay devic
Page 114 and 115: Signal for overcurrent releases tri
Page 116 and 117: 1SDC200147F00015c) Electrical signa
Page 118 and 119: Transformers and operation counters
Page 120 and 121: 1SDC200163F00018e) Accessory for sh
Page 122 and 123: Interlock between circuit-breakers1
Page 124 and 125: The emergency power supply is usual
Page 126 and 127: ATS021ATS022GeneralAuxiliary Power
Page 130 and 131: Applications of thecircuit-breakerC
Page 132 and 133: To guarantee selectivity for Emax c
Page 134 and 135: Double SThanks to the new PR123 tri
Page 136 and 137: Solution with the PR123 trip unit w
Page 138 and 139: The figure at the side showsthe tim
Page 140 and 141: To carry out the cabling, a shielde
Page 142 and 143: Primary and secondary distributionB
Page 144 and 145: By assuming some numerical values f
Page 146 and 147: Direction (OUT-IN)Bw ➞ BwBw ➞ F
Page 148 and 149: Direction (OUT-IN)Fw ➞ FwFw ➞ B
Page 152 and 153: With the same configuration, a faul
Page 154 and 155: Using the SACE RCQ switchboardelect
Page 156 and 157: MV-LV substation with multipletrans
Page 158 and 159: Switching and protection of transfo
Page 160 and 161: Example:In an installation with Un=
Page 162 and 163: Table for selecting circuit-breaker
Page 164 and 165: Switching and protection of asynchr
Page 166 and 167: WarningThe curves of the motor and
Page 168 and 169: This protection can be carried out
Page 170 and 171: Switching and protection of capacit
Page 172: ABB SACE 6/436
Page 175 and 176: Overall dimensionsFixed circuit-bre
Page 181 and 182: Overall dimensionsWithdrawable circ
Page 189 and 190: 1000 max1000 maxOverall dimensionsC
Page 191 and 192: Overall dimensionsCircuit-breaker a
Page 193 and 194: Overall dimensionsCircuit-breaker a
Page 196 and 197: Circuit diagramsContentsReading inf
Page 198 and 199: M = Motor for charging the closing
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NotesA) The circuit-breaker is only
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Circuit diagramsCircuit diagram sym
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Circuit diagramsElectrical accessor
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Auxiliary circuits of the PR121, PR
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HMI030(*) Connect 5 and 6 terminals
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WITH SAFETY AUXILIARY VOLTAGE SUPPL
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Ordering codesContentsGeneral infor
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Ordering codesSACE Emax automatic c
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1SDC200259F0001PR121/P PR122/P PR12
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1SDC200259F0001PR121/P PR122/P PR12
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1SDC200259F0001PR121/P PR122/P PR12
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1SDC200260F0001PR121/P PR122/P PR12
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1SDC200260F0001PR121/P PR122/P PR12
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1SDC200260F0001PR121/P PR122/P PR12
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1SDC200260F0001PR121/P PR122/P PR12
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1SDC200261F0001PR121/P PR122/P PR12
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1SDC200262F0001PR121/P PR122/P PR12
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Ordering codesSACE Emax automatic c
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Ordering codesSACE Emax switch-disc
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1SDC200259F00011SDA......R13 Poles
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1SDC200260F00011SDA......R13 Poles
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1SDC200260F00011SDA......R13 Poles
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1SDC200262F00011SDA......R13 Poles
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1SDC200264F00011SDA......R14 PolesE
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1SDC200260F00011SDA......R1E3H/E 12
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1SDC200260F00011SDA......R13 Poles
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1SDC200260F00011SDA......R13 Poles
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1SDC200262F00011SDA......R13 Poles
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Ordering codesSACE Emax MTP earthin
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Ordering codesSACE Emax FP fixed pa
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Ordering codesConversion kit for fi
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Ordering codesSACE Emax accessories
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1SDA.....R1Electrical signalling of
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1SDA.....R1Circuit-breaker lock in
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1SDA.....R1Auxiliary unitsAutomatic
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Ordering codesElectronic trip units
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2) MechanicalinterlocksInstructions
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Contact usABB SACEA division of ABB
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