There Is A Problem With The High Voltage Disconnect Switch

high voltage isolator is the most widely used and applied high-voltage electrical equipment in the power system. However, since the main function of high voltage isolator switch is isolation, it does not open or close load current and fault current, and is in the closed state for a long time and is rarely operated, and its structure is relatively simple and easy to manufacture, the isolating switch is the electrical equipment least valued by the manufacturing and use departments. Manufacturers often produce hv isolator as an additional product to match the circuit breaker, and put the design, material selection, processing technology, assembly and commissioning, and quality control of the product in a secondary position. Therefore, compared with the circuit breaker, its performance and quality are difficult to guarantee; the operation department also ignores the management of hv isolator switch in the professional management of high-voltage switches, especially the maintenance management. The maintenance is in a free state, there is no unified and legal maintenance regulations, and there is a widespread phenomenon of long-term disrepair, especially the busbar isolating switch is basically not maintained. In operation, the high-voltage disconnector is actually in a state of "not repaired unless it is broken, repaired only when it is broken, and broken again after repair". Since both the manufacturer and the user put the high-voltage disconnector in a secondary position, high-voltage disconnectors have been failing frequently for a long time without being fundamentally solved.