HET 250kVA/50kV 25kV Exciter Transformer

Mode: HET 250kVA/50kV 25kV
Rated frequency: 50Hz
Rated capacitance: 250kVA
Rated frequency: 30-300Hz
Rated input current: 400V
Rated input voltage: 2x500V, 2x550V, 2x600V
Rated input current: 2x250A
Rated output voltage: 2x25kV (Double winding), when serial connection: 50kV; when parallel connection: 25kV
Rated output current: serial connection: 5A;parallel connection: 10A 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: