HTTS 150KV/367.5KVA Tank type Test Transformer

Mode: HTTS 150KV/367.5KVA
Tank Type                                          Rated Capacity: 367.5kVA
Single phase                                       Rated voltage: 150kV
Frequency: 50Hz                              Rated Current: 2.45A
Input voltage: 0-800V

There are two winding inside the transformer, the winding can be serial connected or parallel connected:
When paralleled: output is 75kV 4.9A   ;   When serial connected: the output is 150kV 2.45A
Cooling methods: ONAN                   No-load current ≤10%
Waveform deviation ≤ 3%               Impedance voltage ≤10%
PD Level: <50pC at 100%UH of complete test system
Running time and temperature raise: 2hour on, 2hour off, 4cycle per day. Transformer winding temperature raise less than 65K, oil surface temperature raise less than 55K.
Over-current capability: withstand 300s at 125%IH, no damage to transformer winding.
Over-voltage capability: withstand 60s at 110%UH, no damage to transformer insulation.

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: