HGTS 1250kV/1250kVA Gas Insulated Test Transformer

Mode: HGTS 1250kV/1250kVA
Casing, Stationary type                                                                  Rated Capacity: 1250kVA
Single phase                                                                                     Rated Voltage: LV Voltage: 2x3kV; HV voltage: 1250kV
Frequency: 50Hz                                                                             Rated Current: LV Current: 2x208.3A HV Current: 1A

Low voltage winding can be serial or parallel connected:
When serial connected: HV output is 625kV 1A;
When parallel connected: HV output is 1250kV 1A.
(HV terminal of the transformer will be earthed through a current transformer 5/5 so as to check the current value of HV side and ensure safety of the operators and equipment)
Waveform deviation ≤3%                                                            Impedance voltage ≤15%

Over Current Ability: withstand300s at 120% rated current (1.2A), no thermal damage or distortion of the winding.
Over Voltage Ability: Overvoltage at 105% UH (1312.5kV) for 60s, not happened any insulation damage for the testing transformer.
Short circuit breakdown test: breakdown via damping resistor (protection resistor) three times at 1000kV, no damage to the transformer.
Insulation Level: 10kV/1min (low voltage winding to earth)  
5kV/1min (high voltage terminal to ground)
Partial discharge level: ≤5pC at 100%UH;     ≤3pC at 80%UH
Winding to earth insulation: HV winding to LV winding and earth >1500MΩ
LV winding to HV winding and earth >1500MΩ
Noise: ≤65dB(A)                                                                               Dielectric loss: <0.5%
Operating Time: At 100%UH, 100%IH, 5min on, 30min off; every day 20cycles.
Testing transformer windling temperature raise≤65K.

Principle Diagram: