HCTT 70KV/70KVA Test Transformer

Mode: HCTT 70KV/70KVA
Cylinder type                                     
No-load current ≤10%
Single phase                                      
Waveform deviation ≤3%
Frequency: 50Hz                                
Impedance voltage ≤5%
Rated Capacity: 70kVA                      
Dielectric loss <0.5%
Rated output voltage: 70kV              
Noise level: <60dB
Rated output current: 1A                  
PD Level: <5pC at 100%UH of complete test system
Input voltage: 0~400V  (Can be customized according to User's feeding power)      
Working for 60 minutes allowed at 100% rated current & voltage;
Cooling methods: ONAN                   
Withstand voltage: 110% rated voltage 1min

Over-current capability: 120%In 3min, no damage to transformer winding.
Temperature rise of transformer windings is less than 65K, temperature rise of oil surface is less than 55K.
Transformer Oil: 25# China made
Dimension:Dia. Φ700mm×1000mm
Basement dimension : Φ800×1000mm
Weight: 725kg

 
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: