LV generator protection - engineering site - Schneider Electric

In shortA LV Generator Set normally has apower of less than 2 500 kVA: thetypical value is around 800 kVA.The LV Generator Set is mainlyused as a replacement and/orsafety source. The main source isswitched to the replacement source:b with load-shedding of non-priorityloadsb by means of an automatic sourcechangeover switch controlled byvoltage.The Generator SetApplication in LV2.1. Choice of HV or LV systemSupply voltage is chosen mainly with respect to Generator Set powerrequirements.Generator Set as HV sourceThe Generator Set is normally a generator activated by a diesel motor or a gasturbine.The production Set application, requiring high installed powers, is thus normallycarried out using the MV system.Generator Set as LV sourceThe Generator Set is normally a generator activated by a diesel motor.The following table summarises the system choice criteria:criteria LV HV commentspower < 2500 kVA > 2500 kVAfacility +++ +regulations ++LV Generator Set applicationsLV Generator Sets are mainly used:b to supply safety equipmentb to replace the Main sourceb to supply temporary installationsThe sectors of activity where it is necessary to have a Replacement and/orSafety source, are very vast ranging from Tertiary to Industry.The following table lists the main application sectors:tertiaryhospitalscomputer Centre (bank, etc.)public buildingindustrialprocess,cement works (furnacemotor), …12