In an SF₆ circuit breaker, the SF₆ gas can decompose into toxic and corrosive gases and water in a high-temperature environment, which can damage the insulating layer. To prevent this situation, while effectively strengthening the protection of electrical components, the insulation level should also be improved. In addition, faults should be analyzed, and corresponding measures should be taken for treatment.1 Case AnalysisA 110 kV switch in a substation was struck by lightning, causing a reclosi

High - voltage SF₆ circuit breakers are three - phase AC 50Hz outdoor high - voltage electrical equipment. They adopt a self - energy arc - extinguishing chamber structure and are equipped with spring operating mechanisms. These circuit breakers feature a simple structure, convenient operation, and high safety and reliability. Therefore, they are widely used for the control and protection of transmission and distribution lines and can also serve as tie - type circuit breakers.The 110kV system of

The GIS (Gas Insulated Switchgear) utilizes SF₆ gas as both the insulating and arc-extinguishing medium. It boasts several advantages, such as a small footprint, high reliability, excellent safety, and convenient maintenance. The SF₆ circuit breaker, being an integral part of the GIS equipment, holds a dominant position in voltage levels of 110 kV and above.This article details a fault that occurred during the power generation and synchronization process of Unit 1 in a certain power plant. Speci

In the substation system, high - voltage circuit breakers are power - interrupting devices, among which SF₆ circuit breakers are the most common. Such circuit breakers use SF₆ gas as the main insulating medium. Based on the action of arc energy, SF₆ compressed gas is formed to instantly extinguish the arc, thus achieving the interruption of rated current and fault current, protecting power - cutting lines and electrical equipment from damage. The system is equipped with a complete operating syst

1 OverviewCircuit breakers can connect and disconnect circuits according to the operating mode under normal conditions. They can also quickly cut off faulty equipment based on secondary protection signals when a fault occurs, or connect the circuit to restore power supply after a transient fault is eliminated. Thus, they have the dual functions of control and protection . Currently, there are more than a hundred substations in the Pingdingshan area. In each substation, circuit breakers are requi

With the rapid development of the power industry and the continuous expansion of the power grid, high-voltage electrical equipment has become increasingly important in the power system. As a key device in the power system, high-voltage SF₆ circuit breakers play a crucial role in cutting off and closing circuits, as well as quickly interrupting fault currents during system failures. Thanks to their high reliability, excellent insulation performance, and arc-extinguishing capabilities, SF₆ circuit

1 Basic Structure and Working Principle of High - voltage SF₆ Circuit BreakersHigh - voltage SF₆ circuit breakers, as indispensable key equipment in the power system, their structure and working principle are the cornerstones ensuring the safe and stable operation of the power grid. It is composed of multiple precision components, including but not limited to insulators, conductive parts, arc - extinguishing chambers, operating mechanisms, and control circuits. Insulators usually adopt high - st

Due to its excellent electrical insulation properties and arc - extinguishing capabilities, sulfur hexafluoride (SF₆) gas has been widely used in high - voltage and extra - high - voltage power systems. Compared with traditional circuit breakers, SF₆ circuit breakers are more reliable and have a longer service life. However, as the usage time and load increase, the faults of SF₆ circuit breakers gradually emerge, especially the breakdown faults, which have become a hidden danger to the safe oper

1. Faults in the Installation and Debugging of Substation Electrical Equipment1.1 Transformer FaultsDuring the installation and debugging of substation electrical equipment, as a core device, the installation and debugging of the transformer are of utmost importance. The following are specific problems that may be encountered during the installation and debugging of the transformer.1.1.1 Installation ProblemsPosition and Fixing: The installation position of the transformer needs to meet the desi

I. IntroductionThe abnormal operation status of the secondary circuit of the relay protection in a substation has a significant impact on the overall power system. On one hand, the secondary circuit of the relay protection is a crucial component of the power system, and its main function is to ensure the stable operation of the power system. When the operation status of the secondary circuit is abnormal, it may lead to a decrease in the stability of the power system and increase the likelihood o