Disconnecting switch

Abstract

The invention relates to a disconnecting switch. A push rod is arranged in a disconnecting switch body, the push rod is divided into an upper section and a lower section which are connected to be a whole by an insulating rod. By means of the disconnecting switch, electric current in the push rod can be effectively prevented from flowing when the disconnecting switch normally operates, accelerating fatigue and aging of a pressure spring and a reset spring due to current effect and heating of the push rod is avoided, and problems that switching on of a contact of the disconnecting switch is not in place due to fatigue of the pressure spring and the reset spring or the contact of the disconnecting switch is heated due to insufficient pressing force are radically solved. The reliable operating characteristic of the disconnecting switch is greatly improved, and the service life of the disconnecting switch is prolonged.

Description

technical field [0001] The invention belongs to a power management system, and in particular relates to an isolating switch. Background technique [0002] The rapid development of the national economy relies on electricity. The society has higher and higher requirements for the quality of electric energy and the reliability of power supply. The isolating switch plays a pivotal role in the power grid. equipment. [0003] The isolating switch used in the current power grid is generally LW1617-252 type. This kind of isolating switch has the following disadvantages during normal operation: although the ejector rod in the switch is not a conductive part of the conductive circuit, there is also current flowing through it. Heating of the rod leads to accelerated fatigue and aging of the compression spring and return spring. Poor contact and heating of the isolating switch contacts caused by the fatigue of the compression spring and the return spring caused by the contact gap of ...

AI Technical Summary

Problems solved by technology

[0003] The isolating switch used in the current power grid is generally LW1617-252 type. This kind of isolating switch has the following disadvantages during normal operation: although the ejector rod in the switch is not a conductive part of the conductive circuit, there is also current flowing through it. Rod heat causes compression spring and return spring to accelerate fatigue aging

Poor contact and heat generation of the isolating switch contacts caused by the fatigue of the compression spring and the return spring due to the lack of contact between the contacts of the isolating switch or insufficient pressing force

Due to the large heat energy generated by the poor contact of the contact, it is transmitted to the ejector rod, the compression spring and the return spring again, which makes the temperature of the compression spring and the return spring rise higher, making them tired and aging faster. This vicious circle It destroys the electrical performance of the isolating switch and shortens the service life of the isolating switch

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