HTTS 50kVA/5kV Test Transformer

Mode: HTTS 5KV/50KVA
Tank type                                                              HV winding: 5kV
Single phase                                                        HV current: 10A
Frequency: 50Hz                                                  Cooling methods: ONAN
Rated Capacity: 50kVA                                        No-load current ≤10% No-load current ≤10%
Rated input voltage: 0.38Kv                               Impedance voltage ≤10%
Rated current: 131.6A                                         Waveform deviation ≤3%

Over-current capability: Working for 300s allowed at 120%In, without any damage to transformer winding and insulation.
Over-voltage capability: Working for 60s allowed at 110% rated current, without any damage to transformer insulation.
Insulation level: withstand 3kV/min (Low voltage input ending to ground)
Dielectric loss: <0.5%
Working time: working 60 minutes under 100% rated 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.
Protection: At the high voltage end we use ML-15/5 current transformer to make sure current protection, and to make sure safety of personnel and equipment;
Dimension: 440mm*350mm*420mm                          Weight: <65kg

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 ℃) is not more than 0.3%, water content is not more than 10mg / L, the gas content is not more than 1%.

Principle Diagram: