HCTT 150KV/75KVA Test Transformer

Mode: HCTT 150KV/75KVA
Cylinder type                                               Rated output current: 0.5A
Two modules can be serial or parallel connection;
When serial connection, output is 150kV 0.5A,
When parallel connection, output is 75kV 1A.
Single phase                                                 Cooling methods: ONAN
Frequency: 60Hz                                         No-load current ≤10%
Rated Capacity: 75kVA                               Waveform deviation ≤5%
Rated input voltage: 0.4kV                        Impedance voltage ≤10%
Rated output voltage: 2x75kV                  PD Level: <2pC at 100%UH of complete test system
Working for 60 minutes allowed at 100% rated current & voltage;

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.

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: