Common Faults Of High Voltage Isolating Switches And Their Countermeasures

high voltage isolator is a main equipment used in conjunction with circuit breakers in substations and power transmission and distribution lines, and plays a relatively important role in operation. Isolating switches, also known as isolating knife switches, are mainly used to ensure the safety of high-voltage device maintenance work. Isolating switches are used to form a sufficiently large and visible air insulation interval between the equipment to be repaired and other live parts. Do you know the common faults and countermeasures of high voltage isolator switch? After reading this article, you will suddenly understand.

hv isolator Heating faults and countermeasures:
Check whether the hv isolator switch contact and the drainage clamp of the wire are in poor contact. For the structure of high voltage electrical isolator, mainly check whether the top cap contact points at both ends and the contacts or knife edges crimped by springs are overheated and whether the support insulators are deteriorated, causing the overall temperature to rise. After discovering the fault, report it to the dispatcher, immediately try to reduce or transfer the load, and strengthen monitoring.
If the isolating switch on one bus side is hot during double bus connection, the line can be switched to another bus section for operation. When the bus can be shut down, after transferring the load, the above-mentioned isolating switch heating problem can be checked by power outage after asking the dispatcher and the superior. If there is a bypass bus, the load can be transferred to the bypass bus.
If a bus side is hot during single bus connection, the bus cannot be shut down in a short time, the load must be reduced and monitoring must be strengthened. When the bus can be shut down, the hot isolating switch can be shut down for maintenance.
If the load side (line side) isolating switch is hot during operation, the treatment method is basically the same as that of single bus connection. For the heating of the isolating switch in the high-voltage room, in addition to reducing the load and monitoring it during the operation, ventilation and cooling measures should be taken. During the power outage for maintenance, the cause of the heating of isolator high voltage should also be checked and handled.