HGTS 600KV/3000KVA Gas Insulated Test Transformer

Mode: HGTS 600KV/3000KVA
Casing, Stationary type                           Frequency: 50Hz
Single phase                                            Rated Capacity: 3000kVA
Rated Voltage: excitation winding: 2x6kV; HV winding: 600kV
Rated Current: excitation current: 2x250A HV Current: 5A
LV Winding can be parallel connection or serial connection:
When serial connection: HV output is 300kV / 5A
When parallel connection: HV output is 600kV / 5A
(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 ≤12%
Unload Current: IO <10%                        Voltage Ratio of Measurement Windings: 1000:1

Over Current Ability: Continuous working for 300S under 120% rated current (6A), then thermal damage or distortion of the winding shall not be occurred.
Over Voltage Ability: Overvoltage at 110% UH (660kV) for 60s, then it shall not happened any insulation damage for the testing transformer.
Short-circuit Discharge Test: under 480kV short-circuit discharge three times via damping resistor, not cause any damage on the system.
Insulation Level: 20kV/1min (low voltage input terminal to earth); 5kV/1min (HV terminal to earth)

Winding Insulation level to earth:
HV winding to LV winding, and earth >1500MΩ
LV winding to HV winding, and earth >1500MΩ
Partial discharge level: ≤5pC, under 100% rate voltage; ≤3pC, under 80% rate voltage
Noise: ≤60dB                            Dielectric loss: <0.5%
Operating Time: Working for 30 minutes allowed at 100% rated current & voltage; and temperature rise of transformer windings is less than 65K.
Protection: Equip with 3kV surge arrestors.

Principle Diagram: