HET 300kVA/10kV,5kV,2.5kV Exciter Transformer

Mode: HET 300kVA/10kV,5kV,2.5kV
Rated frequency: 25Hz
Working frequency: 20~300Hz
Rated capacitance: 300kVA
HV winding is independent winding:
LV winding voltage: 2x450V, 2x500, 2x550V
HV winding voltage: 2.5kV, 5kV, 10kV
LV winding current: 2x300A                          
HV winding current: 30A
Cooling methods: ONAN Heat‐resistance: A grade, 25# transformer oil
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 Cylinder and moister absorber on  transformer;  Oil temperature  thermograph  and  oil  level  indicator  are  set  on  oil  expansion  Cylinder; 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 Exciter transformer insulation characteristic: Exciter transformer insulation levelwill determin transformer’s safety work and insulation ageing speed. To guarantee no flashover- which coming from external, electric potential raise and cause damage to the main insulation and minor insulation. We will also set insulation layer between HV windings and turn-to-turn. Winding is cylinder type. Capacitance is determin by the winding’s area. When design, we’d try our best to make sure the top and bottom has same area, and compensate with electrostatic shield to improve the initial voltage distribution. Winding skeleton is made of compound insulation tube: can get down partial discharge and shielding the iron coil.

Principle Diagram: