HCTT-2x250kV/1000kVA AC Test Transformer

Mode: HCTT 2x250KV/1000KVA
Cylinder type,  Single phase
Working frequency: 50Hz, 60Hz, 100Hz, 120Hz
Rated capacitance: 1000kVA
Rated Voltage:  LV Voltage: 4 x 3kV,   HV Voltage: 500kV
Rated Current:  LV Current: 4 x 83.3A  HV Current: 2A
Low Voltage Winding can be serial connected or parallel connected:
When four winding serial connected, HV output is 125kV 2A
When two serial and two parallel connected, HV output is 250kV 2A
When four winding parallel connected, HV output is 500kV 2A
(Test transformer high voltage end earth via 5/5 current transformer, the HV end current can be supervised when testing, making sure the safety of operator.)
 

Insulation characteristic:
Winding to ground insulation:
HV Winding to LV winding, measuring winding and ground >1500MΩ
 LV Winding to HV winding, measuring winding and ground >1500MΩ
 Measuring Winding to LV winding, HV winding and ground >1500MΩ
Insulation level: test transformer LV input winding to ground withstanding level: 10kV/1min; Test transformer measuring winding to LV, HV winding and shell withstanding level: 5kV
Partial discharge level:  <3pC under 100% rated voltage,
Output voltage waveform deviation: ≤3%
No-load current: <10%,    Impedance voltage ≤8%
Dielectric loss <0.4%

Working time and temperature: Continuous working 24hours under 60% of rated voltage and 50% of rated current.
Winding temperature raise not surpass 65K, oil temperature raise less than 55K
Noise level: ≤60dB (measured in 5 meter distance)
Insulation level: 1 min under 110% rated voltage
Measuring system accuracy: 1grade
Protection function: equip 3kV arrester on the transformer two modules Low Voltage winding.

Principle Diagram: