HCTT-4x400KV/1600KVA AC Test Transformer

Mode: HCTT 4x400KV/1600KVA
Cylinder type                                                      Single phase, 50Hz
Rated voltage: Low voltage: 3 KV                   High voltage: 1600KV
Rated current: LV current: 2*266.7A              HV current: 1A
Rated capacity: 1600KVA
Voltage ratio of measuring winding: 3000:1
Waveform distortion: ≤3%
Impedance voltage of three staged in serial connection: ≤25%
Dielectric loss factor: tanδ≤0.3%
PD level: ≤8pC under 100% rated voltage; ≤5pC under 80% rated voltage
Insulation level: self-inducted withstand for 1 min under 110% rated voltage
Voltage unevenness of three stages in serial connection: <±5%
Working time: 1 hour on and 1 hour off under rated voltage and rated current; no more than 8 times per day;
Over current ability: continuous working for 5 min under 120% rated current without any damage and distortion to transformer winding;
Over voltage ability: withstand for 1 min under 110% rated voltage without any damage to transformer insulation; the waveform distortion at this moment is ≤5%;
Among lower winding, transmission winding and upper winding installed 1KV capacitor parallel with protection MOA;
Dimension: 6500mm*2000mm*1700mm
Weight: <61000kg
 

Lowest stage Test Transformer
HCTT 1600KVA/1200KVA/400KVA/400KV
Cylinder typeSingle phase, 50Hz
Rated capacity: LV winding: 1600KVA   HV winding: 400KVA  Total winding: 1200KVA
Rated voltage: LV winding: 2*3KV     HV winding: 400KV   Total winding: 3KV
Rated current: LV winding: 2*266.7A   HV winding: 1 A     Total winding: 400A
Short-circuit impedance: <5%
Voltage ratio of measuring winding: 1000:1
Waveform distortion: ≤3%
Cooling: ONAN
Dielectric loss factor: tanδ≤0.3%
PD level: ≤5pC under 100% rated voltage; ≤3pC under 80% rated voltage
Winding to ground insulation:
HV winding to LV winding, measuring winding to ground: >2500MΩ
LV winding to HV winding, measuring winding to ground: >2500MΩ
Measuring winding to HV winding, LV winding to ground: >2500MΩ

Insulation level:
LV winding to measuring winding, HV winding to ground withstand: 5KV/MIN
Measuring winding to LV winding, HV winding to ground withstand: 5KV/MIN
HV winding to measuring winding, LV winding to ground withstand: 5KV/MIN
Working time: 1 hour on and 1 hour off under rated voltage and rated current; no more than 8 times per day;
Over current ability: continuous working for 5 min under 120% rated current without any damage and distortion to transformer winding;
Over voltage ability: withstand for 1 min under 120% rated voltage without any damage to transformer insulation; the waveform distortion at this moment is ≤5%;
Between exciter winding and transmission winding installed 3KV capacitor parallel with protection MOA;

Middle/Lower stage Test Transformer
HCTT 1200KVA/800KVA/400KVA/400KV
Cylinder type
Single phase, 50Hz
Rated capacity: LV winding: 800KVA   HV winding: 400KVA  Total winding: 400KVA
Rated voltage: LV winding: 3KV     HV winding: 400KV   Total winding: 3KV
Rated current: LV winding: 266.7A   HV winding: 1 A     Total winding: 133.3A
Short-circuit impedance: <5%
Waveform distortion: ≤3%
Cooling: ONAN
Dielectric loss factor: tanδ≤0.3%
PD level: ≤5pC under 100% rated voltage; ≤3pC under 80% rated voltage
Winding to ground insulation:
HV winding to LV winding, measuring winding to ground: >2500MΩ
LV winding to HV winding, measuring winding to ground: >2500MΩ
Measuring winding to HV winding, LV winding to ground: >2500MΩ

Insulation level:
LV winding to measuring winding, HV winding to ground withstand: 5KV/MIN
Measuring winding to LV winding, HV winding to ground withstand: 5KV/MIN
HV winding to measuring winding, LV winding to ground withstand: 5KV/MIN
Working time: 1 hour on and 1 hour off under rated voltage and rated current; no more than 8 times per day;
Over current ability: continuous working for 5 min under 120% rated current without any damage and distortion to transformer winding;
Over voltage ability: withstand for 1 min under 120% rated voltage without any damage to transformer insulation; the waveform distortion at this moment is ≤5%;
Between exciter winding and transmission winding installed 3KV capacitor parallel with protection MOA;

Middle / Upper stage Test Transformer
HCTT 800KVA/400KVA/400KVA/400KV
Cylinder type
Single phase, 50Hz
Rated capacity: LV winding: 1200KVA   HV winding: 400KVA  Total winding: 800KVA
Rated voltage: LV winding: 3KV        HV winding: 400KV   Total winding: 3KV
Rated current: LV winding: 400A       HV winding: 1 A     Total winding: 266.7A
Short-circuit impedance: <5%
Waveform distortion: ≤3%
Cooling: ONAN
Dielectric loss factor: tanδ≤0.3%
PD level: ≤5pC under 100% rated voltage; ≤3pC under 80% rated voltage

Winding to ground insulation:
HV winding to LV winding, measuring winding to ground: >2500MΩ
LV winding to HV winding, measuring winding to ground: >2500MΩ
Measuring winding to HV winding, LV winding to ground: >2500MΩ

Insulation level:
LV winding to measuring winding, HV winding to ground withstand: 5KV/MIN
Measuring winding to LV winding, HV winding to ground withstand: 5KV/MIN
HV winding to measuring winding, LV winding to ground withstand: 5KV/MIN
Working time: 1 hour on and 1 hour off under rated voltage and rated current; no more than 8 times per day;
Over current ability: continuous working for 5 min under 120% rated current without any damage and distortion to transformer winding;
Over voltage ability: withstand for 1 min under 120% rated voltage without any damage to transformer insulation; the waveform distortion at this moment is ≤5%;
Between exciter winding and transmission winding installed 3KV capacitor parallel with protection MOA;

Uppest stage Test Transformer
HCTT 400KV/400KVA
Cylinder type
Single phase, 50Hz
Rated capacity: LV winding: 400KVA   HV winding: 400KVA 
Rated voltage: LV winding: 3KV       HV winding: 400KV  
Rated current: LV winding: 133.3A    HV winding: 1 A   
Short-circuit impedance: <5%
Waveform distortion: ≤3%
Cooling: ONAN
Dielectric loss factor: tanδ≤0.3%
PD level: ≤5pC under 100% rated voltage; ≤3pC under 80% rated voltage
Winding to ground insulation:
HV winding to LV winding, measuring winding to ground: >2500MΩ
LV winding to HV winding, measuring winding to ground: >2500MΩ
Measuring winding to HV winding, LV winding to ground: >2500MΩ

Insulation level:
LV winding to measuring winding, HV winding to ground withstand: 5KV/MIN
Measuring winding to LV winding, HV winding to ground withstand: 5KV/MIN
HV winding to measuring winding, LV winding to ground withstand: 5KV/MIN
Working time: 1 hour on and 1 hour off under rated voltage and rated current; no more than 8 times per day;
Over current ability: continuous working for 5 min under 120% rated current without any damage and distortion to transformer winding;
Over voltage ability: withstand for 1 min under 120% rated voltage without any damage to transformer insulation; the waveform distortion at this moment is ≤5%;
Between exciter winding and transmission winding installed 3KV capacitor parallel with protection MOA;