HCTT 300kV/600kVA Test Transformer

Mode: HCTT 300KV/600KVA
Cylinder type, single modules                                     Rated Capacitance: 600kVA
Single phase                                                                   Rated Voltage: LV Voltage: 2*0.6kV; HV Voltage: 150kV / 300kV
Frequency: 50Hz                                                           Rated Current: LV Current: 2*500A HV Current: 2A

Low voltage winding can be serial connected or parallel connected:
When serial connected, the HV output voltage is 150kV 2A
When parallel connected, the HV output voltage is 300kV 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 ≤5%            Unload Current: IO<8%             Impedance voltage ≤8%
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 (330kV) for 300s., then it shall not happened any insulation damage for the testing transformer.
Noise: ≤65dB                                           PD Level: <150pC at 100%UH of complete test system;
Unevenness at 2 transformer in series: ≤±5%
Transformer Oil: 25# China made
Operating Time: (starting from environment temperature)
At 100%UH, 100%IH, working one hour;
At 240kV 1.6A: One hour on, one hour off, 8 cycle per day.
And temperature rise of transformer winding is less than 65K, temperature rise of oil surface is less than 55K.
Protection: The surge arrestors 0.6kV shall be installed among excitation winding of the transformer and transfer winding for protection purpose.

Injection and release valve for transformer oil are available.
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 (LV winding AC Voltage)
Insulation Level: 5kV/1min (HV terminal AC voltage)
Electric Strength of Transformer Oil:
- Breakdown Voltage>60kV/2.5mm Moisture<10ppm
- Dielectric Loss<0.3%(at 90°C)
- Without acetylene in oil; Solidifying point>40

Structure: 
Inside Structure:
① Use CRGO Steel Model 30Q130 to make iron core and cover with insulated painting as well as glass fibre glass cloth.
② isolated screens are mounted and grounded well among LV windings, iron core, measurement windings and HV windings.
Outside Structure:
① The casing is constructed to be insulated barrel and be flange connected on its both ends which has the features of low leakage current, low PD level and large strength. The surface color will be painted in red.
② The welding portion of the whole structure can bear Max. 20kP air pressure test and without oil leakage and structure damage.
③ The sealing rings will use a high quality rubber which is good to endure oil materials and high temperature conditions.
Dimension: Dia.1500* Height2800mm                       Weight: 6200kg

Principle Diagram: