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Transformer oil testing kit

Insulating oil is a commonly used insulation, arc extinguishing and cooling medium for electrical equipment. In order to ensure its good performance during operation, it must be tested regularly, especially the withstand voltage test. The withstand voltage test of the insulating oil was carried out in a special breakdown voltage tester consisting of a porcelain or glass oil cup and two disk electrodes of 25 mm in diameter (smooth, no burn marks). During the test, the oil sample taken out was poured into the oil cup, and then placed in the electrode so that the two electrodes were separated by 2.5 mm. The test shall be carried out in a room at a temperature of 10 to 35 ° C and a relative humidity of not more than 75%.


Kingrun company developed a brand new full automatic Transformer oil testing kit, transformer oil breakdown voltage tester(JY6611)which is designed according to International Electrical Commission(IEC-156:1995). The tester’s electric system applies microcomputer control, mechanical-electrical integration and full automation,that will make sure high testing accuracy, which completely overcomes the problem of the similar product that is easy to be breakdown under high voltage.


Technical parameter(JY6611)

1. Output voltage: 0~80kV (optional).

2. Resolution: 0.1KV

3. Measuring accuracy:±(2%×reading+0.2kV)

4. Voltage boosting speed: 1.0, 2.0, 3.0kV/S (Optional)

5. Breakdown cutting time:≤1ms

6. Test times: 6 times (Optional from 1 to 6 times)

7. Capacity of oil cup  400ml   200 ml

8. Distance between electrodes 2.5mm (Clearance between electrodes is adjustable)

9. Working environment:

Ambient temperature: 0℃~+40℃    Relative humidity:≤80%RH,non-condensation

Voltage of power supply: AC 220V±10%

Frequency of power supply: 50HZ ±1HZ

10. Exterior size: 385×300×360(mm)

11. Weight: 22kg


The specific test steps are as follows:

(1) Mix the oil sample evenly so as not to cause bubbles. Place it indoors for a few hours to bring the oil temperature as close to room temperature as possible.

(2) The oil sample is connected to the test circuit and allowed to stand for 10 to 15 minutes to allow air bubbles in the oil to escape.

(3) When the power is turned on, it is pressurized at a speed of 3 kV per second, and when the oil sample is broken down (there is a significant spark discharge or the trip switch of the tester trips), the voltage value at that moment is recorded.

(4) After standing for 5 minutes, repeat the above test. Generally, each oil sample is tested 5 times, and the average voltage value is taken 5 times.

(5) If necessary, take two additional oil samples for the same test, and take the average voltage value of the three oil samples as the test result.

(6) If the voltage is added to the maximum value of the tester (such as 50 kV), the oil sample is still not broken down, and it can stay at the maximum voltage for 1 minute, and then no breakdown, the insulation oil is considered to have a good compressive strength.