HET 250kVA/4kV,2.5kV,1.75kV Exciter Transformer

Mode: HET 250kVA/4kV,2.5kV,1.75kV
Rated frequency: 60Hz
Rated capacitance: 250kVA
HV winding is independent winding:
HV winding voltage: 1.75kV, 2.5kV, 4kV
HV winding current: 70A,70A, 62.5A
Rated frequency: 20-300Hz LV
winding voltage: 450V LV
Winding current: 555A
Cooling methods: ONAN
Heat-resistance: A grade, 25# transformer oil,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: