HET 750kVA/4.2kV,3.6kV, 2.5kV,1.75kV Exciter Transformer

Mode: HET 750kVA/4.2kV,3.6kV,2.5kV,1.75kV
Rated frequency: 25Hz
Working frequency: 25~400Hz
Rated capacitance: 750kVA
HV winding is independent winding:
HV winding voltage: 1.75kV, 2.5kV, 3.6kV,4.2kV
HV winding current: 178.5A
LV winding voltage: 2x450V, 2x500, 2x550V
LV winding current: 2x750A
Cooling methods: ONAN
Heat-resistance: A grade, 25# transformer oil
Working time: continuous working 60 min under rated output capacitance, winding≤65K, oil surface ≤ 55K;
Sound level: 60dB
Impedance level: ≤5%
Structure requirement: oil immersed shell type:silicon steel plate is DQ130-30 high quality cooling rolling silicon steel plate, Bm value very low; Transformer has double coils, cooper lead wire, Low voltage winding and HV winding, adopt electrostatic shielding between two windings which has the function of isolation filter; equips measuring coil, used to measure HV side voltage; there are oil expansion tank and moister absorber on transformer; Oil temperature thermograph and oil level indicator are set on oil expansion tank;  Transformer’s spare part and component, e.g. bushing, valve and oil conservator’s structure and layout will not affect the transportation. There are also enough safety distance between transformer HV and LV winding, will not cause partial discharge and corona when testing.

 
Principle Diagram: