Power Transformer

Transformer

·         Current Rating of Transformer = KVA x 1.4

·         Short Circuit Current of T.C /Generator = Current Rating / % Impedance

·         No Load Current of Transformer =< 2% of Transformer Rated current

·         Capacitor Current (Ic) = KVAR / 1.732xVolt (Phase-Phase)

·         Typically the local utility provides transformers rated up to 500kVA for maximum connected load   of 99kW,

·         Typically the local utility provides transformers rated up to 1250kVA for maximum connected load   of 150kW.

·         The diversity they would apply to apartments is around 60%

·         Maximum HT (11kV) connected load will be around 4.5 MVA per circuit.

·         4No. earth pits per transformer (2No. for body and 2No.for neutral earthing),

·         Clearances, approx.1000mm around TC allow for transformer movement for replacement.