HGTS 270kV/405kVA Gas Insulated Test Transformer

Mode: HGTS 270kV/405kVA
Casing, Stationary type                                                   Rated Capacity: 405kVA
Single phase                                                                      Rated Voltage: LV Voltage: 2x6kV; HV voltage: 270kV
Frequency: 50Hz                                                              Rated Current: LV Current: 2x33.75A HV Current: 1.5A

Low voltage winding can be serial or parallel connected:
When serial connected: HV output is 135kV 1.5A;
When parallel connected: HV output is 270kV 1.5A.
Waveform deviation ≤3%           No‐load current <10%         Impedance voltage ≤20%

Over Current Ability: withstand3min at 120% rated current (1.8A), no thermal damage or distortion of the winding.
Over Voltage Ability: Overvoltage at 110% UH (297kV) for 1min, not happened any insulation damage for the testing transformer.
Short circuit breakdown test: breakdown via damping resistor (protection resistor) three times at 270kV, no damage to the transformer.
Insulation Level: 20kV/1min (low voltage winding to earth); 5kV/1min (high voltage terminal to ground)
Partial discharge level: <2pC at 270kV; ≤1pC at 235kV
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%（20℃）
Operating Time: At 100%UH, 100%IH,continuous operation 30min.

Principle Diagram: