High-voltage electrical equipment or safety appliances for live working have their own insulation structures. These devices and appliances will be subjected to internal and external overvoltage, which is much higher than the normal rated working voltage, which may make the insulation structure defective and become a potential failure.
On the other hand, with the operation process, under natural conditions, insulation itself will be reduced due to thermal aging. Preventive test is a set of systematic means and methods to diagnose and test the insulation performance of electrical equipment in operation for these problems and possibilities.
Professional electrical testing: AC withstand voltage test, DC withstand voltage test, DC resistance test, ratio test, loop resistance test, switch test, dielectric loss angle test, insulation test, grounding resistance test, cable and wire insulation diameter test, load test (current) air conditioning wind speed, pressure, temperature, humidity, noise test, lighting brightness test.
During the operation of electrical equipment, due to the influence of electric field force, operating temperature, air humidity, corrosive gas and other factors, the insulation condition will continue to deteriorate, which is a normal decline phenomenon. As long as the operating conditions specified by the equipment manufacturer are met, the safe service life can be achieved.
However, due to the influence of some specific unfavorable factors in the operation process, the normal operation life of electrical equipment may not be achieved, so it is necessary to conduct regular tests and inspections on the insulation status of the equipment on time.
Through analysis, it can be identified whether the insulation aging degree of electrical equipment can meet the requirements of actual operation. According to the inspection and test results, take corresponding maintenance measures and operating procedures to maintain and ensure the normal working level of equipment and ensure safe, economical and reliable operation.
Respondent: Sanxin Electric Power.