Abstract: The preventive test of electric equipment can detect whether the equipment has defects, check whether the equipment is in good condition and provide scientific basis for safe and reliable operation of equipment in the electric system. As for electric companies, the preventive test is recommended for facilitating carrying out maintenance work and ensuring long-term operation of electric equipment. The paper takes 500kV No.2 main transformer in Tingzikou power station as an example to illustrate the test. When the preventive test is being conducted, it is inclined to pose a great risk for electric equipment and testers. Hence, risk and safety management should be enhanced in order to avoid accidents.
Key words: Power transformer, preventive test
The safety, a precondition for all electric work, is an important indicator in the electric industry. The preventive test requires strict safety measures. For instance, measuring equipment is reliably grounded; safety distance remains; effective rails are installed during the whole process of test. Different tests require different safety measures. With the continuous development of electric technologies, technologies of fault detection and elimination are becoming increasingly advanced, which can effectively guarantee normal operation of electric system and offer good electric resources for users.
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