Secondary circuit of 220KV breaker hydraulic mechanism

Abstract

The invention discloses a secondary circuit of a 220KV breaker hydraulic mechanism. When the secondary circuit is used, as the type, the number and the installation position of a pressure mechanism micro switch are selected, a proper pressure value is selected and a relay reflecting the pressure change of a hydraulic mechanism is reasonably selected, operation practice proves that the instrument has the advantages of good operation effect and stable performance, and each performance index conforms to the Chinese standard requirement. After the breaker and the secondary circuit are reformed, hidden equipment dangers in the breaker are eliminated, and the breaker and a relay protection device are correctly matched, thereby causing electrical equipment to safely operate, and ensuring that relay protection work is safely operated. Therefore, breakers of the type are uniformly reformed to ensure a power grid system to operate safely, stably and economically operated.

Description

technical field [0001] The invention belongs to the technical field of application and maintenance of high-voltage circuit breakers, and in particular relates to a secondary circuit of a hydraulic mechanism of a 220KV circuit breaker. Background technique [0002] With the rapid development of the economy, the social economy and people's life demand for electricity is getting higher and higher. It is very important to ensure safe and reliable power supply. The safe and stable operation of the power grid depends to a large extent on the circuit breaker and the secondary system. Reliable performance. For the high-voltage circuit breaker, its function is to turn on and off the load current during normal operation; to cut off the short-circuit current and cut off the faulty equipment when there is a fault. In actual operation, most of the 220KV high-voltage circuit breakers use sulfur hexafluoride switches, equipped with hydraulic operating mechanisms for opening, closing and a...

AI Technical Summary

Problems solved by technology

The circuit breakers in many substations have been used for more than ten or even twenty years since they were installed. Although overhauls have been carried out during this period, the problem of equipment aging is still serious. Among them, the problem of the hydraulic mechanism is prominent, and leakage occurs during operation, which is easy If the circuit breaker cannot correctly feed back the pressure change to the protection device, it will cause the protection device to malfunction in the event of a fault. device cannot perform its function normally

The reason for this phenomenon is that there are certain defects in the original pressure locking circuit of the circuit breaker, which cannot completely and correctly reflect the pressure of the hydraulic mechanism of the circuit breaker.