HCTT-2x400KV/1600KVA AC Test Transformer

Mode: HCTT 2x400KV/1600KVA
Cylinder type                                          Single phase
Frequency:50Hz                                    Rated Capacity:1600kVA                                  
Rated Voltage:excitation winding: 2*3kV;           HV winding: 2*400kV
Rated Current: excitation current: 2*266.7A      HV Current:2A
(HV terminal of the transformer will be earthed through a current transformer 5/5 so as to check the current value of HV side and ensure safety of the operators and equipment.)
Waveform deviation ≤3%                     Unload Current: IO<10%
Impedance voltage ≤15%                    Voltage Ratio of Measurement Winding:2000:1
Over Current Ability: Continuous working for 300S  under 110% rated current, then thermal damage or distortion of the winding shall not be occurred.
Over Voltage Ability: Over voltage at 110% UH (880kV) for 60s., then it shall not happened any insulation damage for the testing transformer.
Insulation Level:18kV/1min(low voltage terminal to earth)
Noise:≤60dB
PD Level:<2pC at 100%UH of complete test system
Unevenness at 2 transformer in series:≤±5%
Operating Time:(starting from environment temperature)
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.
Protection: The surge arrestors 3kV shall be installed among excitation winding of the transformer and transfer winding for protection purpose.
Injection and release valve for transformer oil are available.
Dimension:Dia. 2200* Height 7600mm (grading ring dia. 3080mm)
Weight: 30000kg

Upper Stage Transformer
Mode :HCTT-800KVA/400KV
Cylinder type             Cylinder Type
Single phase              Frequency: 50Hz
Rated Capacity: 800kVA                       
Rated Voltage: Exciting voltage:3kV, HV Voltage: 400kV
Rated Current: Exciting current: 266.7A  ,HV Current: 2A   
Impedance Voltage ≤5%    Waveform deviation ≤3%
Dividing Ratio of Measurement Winding:1000:1
Noise level ≤60dB (Measure in 4 meters distance)
Cooling: ONAN
Over Voltage Ability: Continuous working for 60S minutes under 110% rated voltage (440kV), then thermal damage or distortion of the winding shall not be occurred.
PD Level:<2pC at 100%UH

Insulation of Winding to Earth:
>1500MΩ(HV winding to LV winding and measurement winding to earth);
>1500MΩ(LV winding to HV and measurement winding to earth);
>1500MΩ(measurement winding to HV and LV winding to earth)
Insulation Level:18kV/1min (LV winding to HV winding and transformer housing)
Insulation Level:5kV/1min (measurement winding to LV winding, HV winding and transformer housing)

Electric Strength of Transformer Oil: 
- Breakdown Voltage>60kV/2.5mm   Moisture<10ppm
- Dielectric Loss<0.5%(at 90℃)
- Without acetylene in oil; Solidifying point>40
Dimension: Dia. 2200* Height 3200mm
Weight:12600kg

Lower Stage Transformer
Type:HCTT-1600KVA/400KV
Single phase           Cylinder Type
Frequency:50Hz                           
Rated Capacity: Exiting capacity: 1600kVA , HV Capacity:1600kVA,Transfer capacity:800kVA
Rated Voltage: Exciting volt.:2*3kV  ,HV Volt.:400kV,Transfer volt.:3kV
Rated Current: Exciting current:2*266.7A  , HV Current:4A,Transfer current:266.7A
Impedance Voltage:≤5%    Waveform deviation ≤3%
Dividing Ratio of Measurement Winding:1000:1
Noise level ≤60dB (Measure in 4 meter distance)
Cooling:ONAN
PD Level:<2pC at 100% UH

Over Voltage:Continuous working for 60S minutes under 110% rated voltage (440kV), then thermal damage or distortion of the winding shall not be occurred.

Insulation of Winding to Earth:>1500MΩ(HV winding to LV, measurement and earth);
>1500MΩ(LV winding to HV, measurement and earth);
>1500MΩ(measurement winding to HV, LV and earth)
Insulation Level:18kV/1min (LV winding to HV winding and transformer housing)
Insulation Level:5kV/1min (measurement winding to LV winding, HV winding and transformer housing)

Electric Strength of Transformer Oil: 
- Breakdown Voltage>60kV/2.5mm   Moisture<10ppm
- Dielectric Loss<0.5%(at 90℃)
- Without acetylene in oil; Solidifying point>40

Principle Diagram: