HET 900kVA/11.8kV,5.9kV Exciter Transformer

Mode: HET 900kVA/11.8kV,5.9kV
Rated frequency: 20~300Hz
Rated capacitance: 900kVA
HV winding rated voltage/current: 5.9kV/152A; 11.8kV/76A
Cooling methods: ONAN
Heat-resistance: A grade, 25# transformer oil
Working time: one hour on, two hour off, three cycle per day, winding≤65K, oil surface≤55K
Sound level: 65dB insulation endurance class: A class Impedance level: <6%
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: