LV generator protection - engineering site - Schneider Electric

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