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Transformer SF6 Gas With Excess Water Treatment
Mar 27, 2018

In operation sf6, when the moisture content of the transformer exceeds the standard, dehydration should be performed. The method is as follows:

    (1) Prepare a container of dry SF6 gas and recovered gas.

    (2) Connect the gas recovery processing device to the self-sealing gas filling connector on the transformer body and recover the sf6 gas in the transformer.

    (3) A gas recovery treatment device is started, and the recovered sf6 gas is treated until the water content and other indicators are qualified and ready to be reused.

    (4) Clean the residual gas inside the transformer, connect the vacuum pump to the self-sealing inflatable joint on the transformer body, vacuum to the residual pressure of 133Pa for 0.5h, then rinse with dry nitrogen several times, residual gas should pass through the adsorbent Handle the tongue to a place that does not affect the safety of the person.

    (5) Remove the adsorbent from the transformer and send it to a drying oven for drying. Dry it for 2 hours or more at a temperature of 450 to 550°C. To prevent moisture absorption, put the dried adsorbent into the human body as soon as possible within 15 minutes. Inside the device.

    (6) Perform vacuum leak detection on the transformer, vacuum the residual pressure to about 133Pa, immediately close the gas inlet valve, and then measure the transformer residual voltage for 4h. The difference between the initial pressure and the final pressure shall not exceed 133Pa. If it does not meet the requirements, there is a leakage in the transformer and it should be dealt with.

    (7) Fill the transformer with SF6 gas, gradually open the valve of the gas recovery treatment device, slowly fill in the qualified Sf6, the gas to the transformer, because sF6 gas in the recycling process has gas loss, should be reused The new sf6 gas, which meets the requirements of the standard, is added to the transformer until it reaches the rated pressure. The actual pressure at the current temperature can be found by the sF6 pressure-temperature characteristic label on the transformer. The sf6 gas moisture content was measured after standing for 4 h. If it fails to meet the standard requirements, the treatment process should be checked and then recycled until it is qualified.


Add: No.38 South Taoyuan Road, Yaozhuang Town,Jiashan County, Jiaxing City, Zhejiang Province, China
Contact person: Elva Zhuang&Sunny Ni
Tel:+86-573-84775555
Fax:+86-573-84776699
Phone:+86-13732570078
E-mail:
sales9@great-relay.com
       sunny.ni@great-relay.com