LV generator protection - engineering site - Schneider Electric

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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
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M M M MLow Voltage Expert Guides N
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In shortGenerator Sets (GS) are use
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ImplementationThe Generator Sets no
Page 8 and 9: Note 2: If there is an MV Set in Pr
Page 10 and 11: E79360EElectrical utilityHV incomer
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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Page 77 and 78: 6.3. Caractéristiquesde la communi
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