LV generator protection - engineering site - Schneider Electric
LV generator protection - engineering site - Schneider Electric
LV generator protection - engineering site - Schneider Electric
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In shortA <strong>LV</strong> Generator Set normally has apower of less than 2 500 kVA: thetypical value is around 800 kVA.The <strong>LV</strong> 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 <strong>LV</strong>2.1. Choice of HV or <strong>LV</strong> systemSupply voltage is chosen mainly with respect to Generator Set powerrequirements.Generator Set as HV sourceThe Generator Set is normally a <strong>generator</strong> 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 <strong>LV</strong> sourceThe Generator Set is normally a <strong>generator</strong> activated by a diesel motor.The following table summarises the system choice criteria:criteria <strong>LV</strong> HV commentspower < 2500 kVA > 2500 kVAfacility +++ +regulations ++<strong>LV</strong> Generator Set applications<strong>LV</strong> 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