No complete set of partial discharge testing equipment

The TQSW-10/100 non partial discharge complete testing equipment is mainly used for conducting power frequency withstand voltage, induced withstand voltage, partial discharge tests, and scientific research tests on some power products below 35kV voltage level, such as transformers, power transformers, high-voltage circuit breakers, cable accessories, etc.

1、 Scope of application

TQSW-10/100No complete set of partial discharge testing equipmentMainly used for power products with voltage levels below 35kV, such as transformers, power transformers, high-voltage circuit breakers, cable accessories, etc., to conduct power frequency withstand voltage, induced withstand voltage, partial discharge tests, and scientific research experiments.

II TQSW-10/100No complete set of partial discharge testing equipmentTerms of Use

Altitude: ≤ 1000m

Environmental temperature: -20 ℃ to+40 ℃

Relative humidity of air: ≤ 90% (25 ℃)

The waveform of the power supply voltage is an actual sine wave, with a waveform distortion rate of less than 3%

There is a reliable grounding point with a grounding resistance of less than 0.5 Ω

Installation location: Indoor

TQSW-10/100 Power Frequency Non Partial Discharge Test Transformer

Model: TQSW-10/100

Structural type: Insulated cylinder type

Number of phases: single-phase

Frequency: 50Hz

Rated capacity: 10kVA

Rated input voltage: 0.2kV

Rated input current: 50A

Rated output voltage: 100kV

Rated output current: 0.1A

Output waveform distortion rate: ≤ 3%

Power frequency withstand voltage level: 110kV/1min

Operating time: It can run continuously for 5 minutes at rated voltage and rated current; Continuous operation is allowed at 2/3 rated voltage and 2/3 rated current

Partial discharge capacity: ≤ 5pc at rated voltage, ≤ 3pc at 80% rated voltage

Cooling method: Oil immersed self cooling

Structural form: Insulation shell wrapped with epoxy glass fiber

Temperature rise:<45K

Impedance voltage:<7%

No load current:<5%

TQSW-10/100No complete set of partial discharge testing equipmentKey points of craftsmanship and processing

1. Due to the fact that high-voltage and low current transformers belong to high-voltage thick insulation structures, the heat generated by coil losses is not easily conducted out. Therefore, it is necessary to reduce the current density of the winding wires to<2.2/mm2 to achieve the goal of reducing the load loss of the transformer.

2. The high-voltage coil adopts a cylindrical pagoda structure to prevent loosening of the coil due to vacuum drying or ground discharge testing. Our company's special winding process is used, and the end adopts an oil passage compression structure to prevent sliding and movement of the coil.

3. To ensure minimal distortion of the transformer output waveform, the magnetic flux density of the transformer is designed below the inflection point of the silicon steel sheet, and the magnetic flux density of the iron core is less than 1.5T. The iron core is made of high-quality DQ130-30 grain oriented silicon steel sheet, stacked with 45 ° full oblique joints, and cut with longitudinal and transverse grid lines to ensure consistent rolling direction. After stacking, it is tightly wrapped and dried with epoxy cloth tape without looseness.

4. The overall structure is an insulated shell, and the insulation cylinder is wrapped with untwisted roving and pressure wound at a constant temperature, with high density, low leakage current, and low moisture absorption.

5. The main insulation adopts 25 # transformer oil insulation, and the sealing gasket adopts aviation technology to produce fluororubber, which is wear-resistant, temperature resistant, and pressure resistant. The hardness reaches 70, the tensile strength is 1Mpa>12, the elongation at break is ³ 200, the deformation under air compression is £ 35, and the deformation under immersion in 25 # transformer oil is £ 50.

6. The raw materials used for the coil are strictly controlled upon arrival at the factory to ensure that the DC resistance of each copper wire coil is equal. When winding, strict control must be exercised over the number of turns in the coil, wire diameter, wire conductivity, width, paper, and coil size.

4. Capacitive voltage divider (also serving as a coupling capacitor)

Model: TAWF-100/400

Rated frequency: 50Hz

Nominal capacitance: 400pF

Rated voltage: 100kV

Nominal voltage division ratio: 1000:1

Measurement error: including low-voltage arm, measurement cable, digital voltmeter ≤ 0.5%

Partial discharge level: 100% rated voltage ≤ 5pC, 80% rated voltage ≤ 3pC

Structural type: Insulated shell oil paper capacitor structure. Composed of top cover, capacitor body, mobile base, low-voltage arm, etc. The voltage divider can also serve as a coupling capacitor for partial discharge measurement.