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As a core equipment in the power system for receiving, distributing electrical energy, controlling and protecting high-voltage equipment, high-voltage switchgear is widely used in industrial production, power distribution, building power supply and other fields. Its safe and stable operation is directly related to the reliability of the power system and the safety of personnel and equipment. Combining on-site operation and maintenance practice, this article details common faults, root causes and scientific troubleshooting methods of high-voltage switchgear to provide comprehensive reference for operators.

In the context of global Industry 4.0, intelligent manufacturing is rapidly becoming the core driving force of the modern industrial system, and its energy demand has also increased significantly. Therefore, the issue of energy conservation and consumption reduction has become particularly critical. In this context, the importance of high-efficiency transformers as key energy-saving equipment in the field of smart manufacturing is self-evident.

High-voltage switchgear is a core complete set of power distribution equipment in the power transmission and distribution system. According to general power industry standards, it specifically refers to enclosed switchgear with a rated operating voltage greater than 36kV, which can realize the connection, disconnection, monitoring, protection and control of high-voltage power circuits. Different from ordinary low-voltage power distribution equipment, high-voltage switchgear is in a charged standby state for a long time, remains in the closed position for most of the time, and only performs opening and tripping operations during equipment maintenance, line faults and power grid dispatching, with extremely low equipment fault tolerance and extremely high reliability requirements.

Although oil leakage in oil-immersed transformers is a common defect, its potential risks should not be underestimated. By adopting a comprehensive management strategy of "prevention first, detection second, and timely handling," combined with scientific detection methods and standardized treatment processes, the risk of leakage can be effectively controlled, equipment lifespan can be extended, and strong support can be provided for the safe and stable operation of the power system.

High-Voltage Switchgear: A metal-enclosed armored complete set of power distribution switchgear with a rated voltage of 3.6kV～40.5kV, integrating circuit breakers, isolating switches, earthing switches, transformers, protection and secondary control components. It is the core primary complete set of equipment in medium and high-voltage power distribution systems.