HCTT 50kV/50kVA Test Transformer

Mode: HCTT 50KV/50KVA
Cylinder type                                                                              
Rated output current: 1A
Single phase                                                                                
Cooling methods: ONAN
Frequency: 50Hz                                                                        
No-load current ≤10%
Rated Capacity: 50kVA                                                              
Waveform deviation ≤3%
Rated input voltage: 0.4kV (Can be customized according to user's feeding power.)                                                 
Noise level: <65dB
Rated output voltage: 50kV                                                    
Working for 60 minutes allowed at 100% rated current & voltage;

Continuous working one hour allowed at 100% rated current & voltage; and temperature rise of transformer winding is less than 65K, temperature rise of oil surface is less than 55K.
Insulation level: LV input terminal to ground withstand voltage: 3kV/1min
Over current capability: withstand 300S at 120%IH (0.12A), no thermal damage to transformer winding or winding transformation.
Over voltage capability: withstand 60S at 110%UH (55kV), no damage to transformer insulation, and now waveform deviation <5%.
Protection: equip 0.38kV Zinc Oxide Arrester at transformer exciter winding.

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: