100kV ~ 400kV Range
HCTT 300kV/300kVA Test Transformer
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HCTT 300kV/300kVA Test Transformer

Lead time: 60 days

Mode: HCTT 300KV/300KVA
Cylinder Type                                                                     Cooling methods: ONAN
Single phase                                                                        No-load current ≤10%
Frequency: 50Hz                                                                 Waveform deviation ≤3%
Rated Capacity: 300kVA                                                     Impedance voltage ≤8%
Rated voltage: 0.6kV  300kV                                              Noise level < 60dB (Full load at 4 meter distance)
Rated Current: 500A    1A                                                  Measuring winding voltage ratio: 1000/1
PD Level: <10pC at 100%UH

Running time and temperature raise: continuous running 1 hour at 100% UH and 100%IH;  Transformer winding temperature raise less than 65K, oil surface temperature raise less than 55K.
Over-current capability: withstand 60s at 120%(1.2A)IH, no damage to transformer winding.
Over-voltage capability: withstand 60s at 110%(330kV)UH, no damage to transformer insulation.
Insulation Level: 5kV/1min (measurement winding to earth; HV terminal to earth; LV winding to earth)

HCTT 300kV/300kVA  Test Transformer HCTT 300kV/300kVA  Test Transformer

HCTT 300kV/300kVA  Test Transformer HCTT 300kV/300kVA  Test Transformer
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: 

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