HCTT-2×500kV/1000kVA AC Test Transformer

Mode: HCTT 2x500KV/1000KV
Cylinder Type                                                                  Single phase
Frequency: 50Hz
Rated capacitance 1000kVA
Rated capacitance :LV capacity:1000kVA                HV capacitance:1000kVA
Rated voltage:          LV voltage 2×3kV                       HV voltage: 1000kV
Rated current:          LV current 2×166.6A                HV current: 1A
(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.)
Cooling methods: ONAN                                                 Waveform deviation ≤3%
Impedance voltage ≤15%                                               Dielectric loss < 0.5%(20℃)
Noise level < 65dB(A)                                                    Voltage not uniformity≤±5%
PD Level: <5pC at 100%UH ,<2pC at 70%UH of complete test system
Running time and temperature raise: continuous running 1 hour at 100% UH and 100%IH; 1hour on, 1 hour off.everyday 8cycle.
Transformer winding temperature raise less than 65K, oil surface temperature raise less than 55K.
Over-current capability: withstand 300s at 120%(1.2A)IH, no damage to transformer winding.
Over-voltage capability: withstand 60s at 110%(1100kV)UH, no damage to transformer insulation.Waveform deviation ≤5%.
 

Upper Stage Transformer
Mode: HCTT-500KVA/500KV
Cylinder type                                  Single phase
Frequency: 50Hz
Rated Capacitance: LV :500kVA ;               HV :500kVA
Rated Voltage:          LV Voltage: 3kV ;       HV Voltage: 500kV
Rated Current:         LV current: 166.6A ; HV Current: 1A
Impedance Voltage ≤3%                               Waveform deviation ≤4.5%
Dielectric loss < 0.5% (20℃)                       Noise level ≤65dB (A)
Cooling: ONAN
Over-current capability: withstand 300s at 120%(1.2A)IH, no damage to transformer winding.
Over Voltage Ability: Continuous working for 60S minutes under 110% rated voltage (550kV), no damage to transformer ,Waveform deviation ≤5%。
PD Level: <5pC at 100%UH of complete test system; <2pC at 70%UH of complete test system;
Continuous running 1 hour at 100% UH and 100%IH;Transformer winding temperature raise less than 65K, oil surface temperature raise less than 55K.

Insulation of Winding to Earth:
>2500MΩ (HV winding to LV winding and earth);
>2500MΩ (LV winding to HV winding and earth);
Insulation Level: 5kV/1min (LV winding to HV winding and earth)
                            10kV/1min (LV winding to HV winding and earth)
Lower-Stage Transformer
Type: HCTT-500KVA/500KV
Single phase                                                     Cylinder Type
Frequency: 50Hz
Rated Capacity: LV capacitance: 1000kVA
HV Capacitance: 500kVA;                            Transfer capacitance: 500kVA
Rated Voltage: LV volt: 2x 3kV ;                 HV Volt.:500kV     Transfer volt: 3kV
Rated Current: LV Current: 2x166.6A ;    HV Current: 1A transfer
current: 166.6A                                                Impedance Voltage: ≤4.5%
Waveform deviation ≤3%                             Dielectric loss < 0.5%(20℃)
Noise level ≤65dB (A)                                    Cooling: ONAN
PD Level: <5pC at 100%UH of complete test system; <2pC at 70%UH of complete test system;
Over-current capability: withstand 300s at 120%(1.2A)IH, no damage to transformer winding.
Over Voltage: Continuous working for 60S minutes under 110% rated voltage (550kV), no damage to transformer ,Waveform deviation ≤5%
Insulation of Winding to Earth:
>2500MΩ (HV winding to LV winding and measurement winding to earth);
>2500MΩ (LV winding to HV and measurement winding to earth);
>2500MΩ (measurement winding to HV and LV winding to earth)

Insulation Level:
5kV/1min (HV winding to LV winding measuring winding and transformer shell)
10kV/1min (LV winding to HV winding and transformer shell)
5kV/1min (measurement winding to LV winding, HV winding and transformer shell)    

Principle Diagram: