“Flashover” may be mentioned in different applications, such as the flashover protection of circuit breakers? Insulating oil flashover protection? Flashover refers to the phenomenon of discharge along the surface of the solid insulator when the gas or liquid dielectric around the solid insulator is broken down. The flashover fault is that the fault point does not form a resistance channel, only the discharge gap or the flashover surface fault. In practical applications, there are many See flashover protection caused by breakdown, flashover protection has this concept in general high-voltage test equipment.

GDTF series substation frequency conversion series resonance test system

Frequency conversion series resonance flashover protection.

The frequency conversion series resonance withstand voltage test device is used to measure the insulation performance of high-voltage electrical equipment. It uses power frequency high voltage output and the voltage is 6~1000kV. It can be used for preventive tests of power cables, GIS, power transformers and busbars. Frequency conversion series resonance The flashover protection is when the high-voltage output occurs, if the test object discharges to the ground or other metal objects, the main control power supply will be shut down for protection.

What measures should be taken after flashover protection occurs?

After the flashover protection occurs, it is recommended not to measure continuously, but to stop the machine for inspection. If you can see the specific location where the flashover occurred, adjust the safety distance and measure the insulation resistance again to see if it is qualified. If the resistance value is not qualified, then the cable may have flashover. network breakdown fault, if the insulation resistance is qualified, the test can be continued.

What is the phenomenon of flashover protection?

Flashover is the phenomenon of discharge, there is no special difference, the measured safety distance does not meet the specifications, or the flashover protection caused by voltage creepage as the voltage rises, the location of flashover protection is generally concentrated in the cable Both ends of the head and tail, the lead part of the transformer.