HET 450kVA/6kV Exciter Transformer

Mode: HET 450kVA/6kV
Rated capacitance: 450kVA
High voltage winding voltage:6kV
High voltage winding current:75A
Rated frequency: 50Hz～300Hz
Low voltage winding voltage:450V/500V/550V
Low voltage winding current:900A
Cooling method: ONAN
Insulation withstand heat :Grade A
Adopt with 25# transformer oil
Temperature raise: working 60 min under 100%UH,100%IH, transformer winding temperature raise ≤65K, oil surface temperature raise ≤55K.

Noise level: <60dB Impedance voltage:≤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: