HCTT-3x500KV/1500KVA AC Test Transformer

Mode: HCTT 3x500KV/1500KVA
Cylinder type                                       Single phase, 50Hz
Cooling Type: ONAN                            Rated capacity: 1500KVA
Rated input voltage: 2*10KV             Rated input current: 2*75A
Rated output voltage: 1500KV (LV winding parallel input)/750KV (LV winding serial input)
Rated output current: 1 A
Impedance voltage: ≤13% (three stages in serial connection)
Voltage unevenness when three stages in serial connection: ≤10% In the output waveform of test transformer under rated voltage, the valid value of resonant waveform is less than 5% of basic waveform. (Waveform distortion of the system is ≤3% if voltage is in the range of 10%-100% rated voltage)
Dielectric loss factor: tanδ≤0.4%
Over current ability: continuous working for 2 min under 130% rated current without damage and distortion to transformer winding;
Over voltage ability: withstand for 1 min under 110% rated voltage without any damage to transformer insulation and its waveform distortion is ≤5% at this moment;
Working time: working for 60 min under 100% rated voltage and rated current, and can continuous work at 2/3 rated voltage and rated current;
Temperature rising: continuous working at 100% rated current, temperature rising of winding is ≤60K, temperature rising of oil is ≤55K;
Among LV winding, measuring winding and HV winding should be grounding shield and earthed reliably.
Between lower exciter winding and upper exciter winding of test transformer installed 6 KV MOA.
Height: 15000mm                            Weight: 70000kg

 

Upper stage Test Transformer
HCTT 500KVA/500KV
Cylinder type
Single phase, 50Hz
Rated capacity: LV winding: 500KVA   HV winding: 500KVA
Rated voltage: LV winding: 10KV   HV winding: 500KV
Rated current: LV winding: 50A    HV winding: 1A
Short-circuit impedance: ≤4%
Over current ability: continuous working for 2 min under 130% rated current without damage and distortion to transformer winding;
Over voltage ability: withstand for 1 min at 110% rated voltage without damage to transformer insulation; the waveform distortion at this moment is ≤5%;

Working time: working for 60 min under 100% rated voltage and rated current; continuous working at 2/3 rated voltage and rated current
Temperature rising: working for 60 min at 100% rated current, temperature rising of winding is ≤60K, temperature rising of oil is ≤55K;
Winding to ground insulation:
HV winding to LV winding, measuring winding to ground: 2000MΩ
LV winding to HV winding, measuring winding to ground: 2000MΩ
Measuring winding to HV winding, LV winding to ground: 2000MΩ
Oil electric strength test: Breakdown voltage ≥65kV / 2.5mm, moisture <10ppm, dissipation factor ≤0.25% (25 ℃)
Low voltage winding insulation level:  outer construction frequency voltage 30kV / min
Noise level: 60db
Cooling: ONAN
Structure: Insulation shell is made up of epoxy fiberglass winding

Middle stage Test Transformer
HCTT 1000KVA/500KV
Cylinder type
Single phase, 50Hz
Rated capacity: LV winding: 500KVA   HV winding: 500KVA  Total winding: 500KVA
Rated voltage: LV winding: 10KV   HV winding: 500KV      Total winding: 10KV
Rated current: LV winding: 50A    HV winding: 1A        Total winding: 50A
Short-circuit impedance: ≤4%
Over current ability: continuous working for 2 min under 130% rated current without damage and distortion to transformer winding;
Over voltage ability: withstand for 1 min at 110% rated voltage without damage to transformer insulation; the waveform distortion at this moment is ≤5%;

Working time: working for 60 min under 100% rated voltage and rated current; continuous working at 2/3 rated voltage and rated current
Temperature rising: working for 60 min at 100% rated current, temperature rising of winding is ≤60K, temperature rising of oil is ≤55K;
Winding to ground insulation:
HV winding to LV winding, measuring winding to ground: 2000MΩ
LV winding to HV winding, measuring winding to ground: 2000MΩ
Measuring winding to HV winding, LV winding to ground: 2000MΩ
Oil electric strength test: Breakdown voltage ≥65kV / 2.5mm, moisture <10ppm, dissipation factor ≤0.25% (25 ℃)
Low voltage winding insulation level:  outer construction frequency voltage 30kV / min
Noise level: 60db
Cooling: ONAN
Structure: Insulation shell is made up of epoxy fiberglass winding

Lower stage Test Transformer
HCTT 1500KVA/500KV
Cylinder type
Single phase, 50Hz
Rated capacity: LV winding: 1500KVA   HV winding: 500KVA  Total winding: 1000KVA
Rated voltage: LV winding: 10*2KV   HV winding: 500KV      Total winding: 10KV
Rated current: LV winding: 75*2A    HV winding: 1A        Total winding: 100A
Short-circuit impedance: ≤4%
Over current ability: continuous working for 2 min under 130% rated current without damage and distortion to transformer winding;
Over voltage ability: withstand for 1 min at 110% rated voltage without damage to transformer insulation; the waveform distortion at this moment is ≤5%;

Working time: working for 60 min under 100% rated voltage and rated current; continuous working at 2/3 rated voltage and rated current
Temperature rising: working for 60 min at 100% rated current, temperature rising of winding is ≤60K, temperature rising of oil is ≤55K;
Winding to ground insulation:
HV winding to LV winding, measuring winding to ground: 2000MΩ
LV winding to HV winding, measuring winding to ground: 2000MΩ
Measuring winding to HV winding, LV winding to ground: 2000MΩ
Oil electric strength test: Breakdown voltage ≥65kV / 2.5mm, moisture <10ppm, dissipation factor ≤0.25% (25 ℃)
Low voltage winding insulation level:  outer construction frequency voltage 30kV / min
Noise level: 60db
Cooling: ONAN
Structure: Insulation shell is made up of epoxy fiberglass winding

Principle Diagram: