LV generator protection - engineering site - Schneider Electric

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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
Page 1 and 2: M M M MLow Voltage Expert Guides N
Page 4 and 5: In shortGenerator Sets (GS) are use
Page 6 and 7: ImplementationThe Generator Sets no
Page 8 and 9: Note 2: If there is an MV Set in Pr
Page 12 and 13: Replacement SourceThe Set’s purpo
Page 14 and 15: 2.2. Transfer deviceIt is interesti
Page 16 and 17: 2.2.2. SequenceMain source / Genera
Page 18 and 19: 3.1.2. Short-circuit current protec
Page 20 and 21: 3.2. Downstream LV network protecti
Page 22 and 23: E79475EGSRemote control 2Remote con
Page 24 and 25: Short-circuit downstream of a UPSTh
Page 27 and 28: Protection and Monitoringof a LV Ge
Page 29 and 30: Protection and Monitoringof a LV Ge
Page 31 and 32: The Schneiderprotection solution4.1
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Page 41 and 42: Summary5.1.DiagramA typical example
Page 43 and 44: Summary5.3. Summaryfunctions produc
Page 45 and 46: 6.1. Characteristics tablesof circu
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6.2. Control unitscharacteristicsMi
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CTCDCE6.3. Communicationcharacteris
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CD3 CD2 CD1CE6 CE5 CE4CD3 CD2 CD183
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6.3. Caractéristiquesde la communi
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LV generator protection - engineering site - Schneider Electric

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