Ground Fault Protection - engineering site - Schneider Electric

Ground fault protection with theRH relays and toroidsof the A, OA and E typesTechnical data and settingsRH328APThe protection provided is of the Zero sequence or Source Ground Return type. TheRH relay acts on the MX or MN coil of the protection circuit-breaker.044322FunctionsRH328AP relaysSensitivit I∆nnumber of thresholds32: from 30 mA to 250 A, setting with 2 selectorsTime delay (ms) 0, 50, 90 , 140, 250, 350, 500, 1s.Early warningsensitivityautomatically set at In∆/2time delay200 msDevice testlocalelectronic + indicator light + contactpermanenttoroid/relay connectionResettinglocal and remote by breaking the auxiliary power supplyLocal indicationinsulation fault and toroid link breaking by indicator light by indicator light without latching mechanismearly warningby indicator light without latching mechanismOutput contactfault contact number 1 standardtype of contact: changeover switches with or without latching mechanismearly warning contact number 1 with “failsafe” safetytype of contact: changeover switches without latching mechanismToresToroids Type A ∅ (mm) Type OA ∅ (mm) Type E ∅ (mm)042598Dimensions TA 30 POA 46 TE30 30 (all thresholds)PA 50 GOA 110 PE50 50 (all thresholds)IA 80 IE80 80 (threshold u 300 mA)MA 120 ME120 120 (threshold u 300 mA)SA 200 SE200 200 (threshold u 300 mA)GA 300Cabling the ground fault protection byVigirexGround fault protection by Vigirex and associatedtoroid controls the breaking device tripping coil: circuitbreakeror switch controlled.DB117333Vigirex cabling diagram44