HTTS 200KV/200KVA Tank type Test Transformer

Mode: HTTS 200KV/200KVA
Tank type                                                          Rated Voltage: excitation winding: 0.6kV
Single phase                                                    HV winding: 200kV
Frequency: 60Hz                                              Rated Current: excitation current: 333.3A
Rated Capacity: 200kVA                                 HV Current: 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%          Unload Current: IO<10%             Impedance voltage ≤10%
Voltage Ratio of Measurement Winding: 1000:1
Over Current Ability: Continuous working for 3 minutes under 150% rated current, then thermal damage or distortion of the winding shall not be occurred.
Over Voltage Ability: Over voltage at 110% UH (220kV) for 60s. Then it shall not happen any insulation damage for the testing transformer.
Insulation Level: 18kV/1min (low voltage terminal to earth)
Noise: ≤60dB                     PD Level: <10pC at rated voltage (200kV)
Dielectric loss: less than 0.5%.
Color: Test transformer and Capacitor is gray color.
Operating Time :( starting from environment temperature)
One hour on and one hour off at 100% rated current & voltage, 8cycle per day.
Continuous working allowed at 80% rated current & voltage; and temperature rise of transformer winding is less than 65K, temperature rise of oil surface is less than 55K.
Protection: The surge arrestors 3kV shall be installed among excitation winding of the transformer and transfer winding for protection purpose.
Injection and release valve for transformer oil are available.
Dimension:Dia. φ1050/φ95×1700                Weight: 1500kg

Transformer Oil: 
25# transformer oil is from Karamay Refinery. The oil indicator can reach the oil level for 500KV transformers. Factory test of test transformer should use new transformer oil supplying with transformers and perform oil inspection before or after factory test. Oil inspection report should be provided when the transformer delivered filled with oil. Quality of transformer oil should meet the requirements of SH0040-91, GB2536-90, GB7595-87, SD187-86, Class II A of IEC-296 standards. Components PCB are prohibited in the oil. When doing acceptance test on-site, the oil performance should satisfy the following requirements: DGA analysis of total hydrocarbons less than 10 mg/L, the breakdown voltage of the oil should not be less than 65kV/2.5mm, dielectric loss (90°C) is not more than 0.3%, water content is not more than 10mg/L, the gas content is not more than 1%.

Principle Diagram: