HCTT-2x500KV/200KVA AC Test Transformer

Mode: HCTT 2x250KV/200KVA
Cylinder type                 Single phase
Frequency:50Hz           Rated Capacity:200kVA                                   
Rated Voltage:excitation winding: 2*0.6kV;        HV winding: 1000kV
Rated Current: excitation current :2*166.7A       HV Current:0.2A
(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 150% rated current, then thermal damage or distortion of the winding shall not be occurred.
Over Voltage Ability: Over voltage at 110% UH (1100kV) for 60s., then it shall not happened any insulation damage for the testing transformer.
Insulation Level: 5kV/1min(low voltage terminal to earth)
Noise:≤60dB
PD Level:<5pC at 100%UH of complete test system, <3pC at 80%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 0.6kV surge arrestors 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: φ1450/φ2900×9200mm
Weight: <17500KG
 

Upper Stage Transformer
Mode :HCTT 100KVA/500KV 
Cylinder type
Single phase
Frequency:50Hz
Rated exciting capacity:100kVA
HV capacitance: 100kVA                       
Rated exciting voltage:0.6kV        
HV Voltage: 500kV
Rated exciting current:166.7A      
HV Current: 0.2A
No-load current <10%
Impedance Voltage ≤5%
Waveform deviation ≤3%
Noise level ≤60dB (Measure in 4 meters distance)
Over Current Ability: Continuous working for 300S under 150% rated current, then thermal damage or distortion of the winding shall not be occurred.
Over Voltage Ability: Over voltage at 110% UH (1100kV) for 60s., then it shall not happened any insulation damage for the testing transformer.
Dimension: φ1290/φ1410x3560mm
Weight:7000kg

Lower Stage Transformer
Type: HCTT 200KVA/500KV
Single phase
Type: Insulated cylinder, fixed structure
Frequency:50Hz                           
Rated Capacity: Exiting capacity: 200kVA,HV Capacity:100kVA,Transfer capacity: 100kVA
Rated Voltage: Exciting volt.:2*0.6kV  ,HV Volt.:500kV,Transfer volt.:0.6kV
Rated Current: Exciting current:2*166.7A  ,HV Current:0.2A,Transfer current:166.7A
No-load current <10%
Waveform deviation ≤3%
Dividing Ratio of Measurement Winding:1000:1
Over Current Ability: Continuous working for 300S under 150% rated current, then thermal damage or distortion of the winding shall not be occurred.
Over Voltage Ability: Over voltage at 110% UH (1100kV) for 60s., then it shall not happened any insulation damage for the testing transformer.    

Principle Diagram: