gis knife switch contact opening and closing condition monitoring system

Abstract

The invention relates to a GIS breaker contact opening and closing condition monitoring system. A closing switch and an opening switch are respectively arranged at the two sides of a connecting lever which is nearest to each breaker contact, the closing control part of a closing breaking device is in serial connection with the closing switch to control the breaking of a first closing normally open contact and a closing normally close contact, so that the operation of a closing indication device serially connected with the first closing normally open contact can be controlled, the opening control part of an opening breaking device is in serial connection with the opening switch to control the breaking of a first opening normally open contact and an opening normally close contact, so that the operation of an opening indication device serially connected with the first opening normally open contact can be controlled, and the closing control part and the opening control part control the operation of an open-phase indicating device in serial connection with the closing normally close contact and the opening normally close contact simultaneously. The GIS breaker contact opening and closing condition monitoring system can accurately reflect the opening and closing conditions of a breaker contact and improves the monitoring accuracy of the breaker contact positions.

Description

technical field [0001] The invention relates to the technical field of electrical equipment, in particular to a GIS knife switch contact opening and closing condition monitoring system. Background technique [0002] GIS (Gas Insulated Switchgear) is a metal-enclosed switchgear that uses gas in whole or in part instead of air under atmospheric pressure as the insulating medium. Corresponding to the three-phase line, each phase is equipped with a knife switch, and the knife switch contacts are completely sealed in the box, so the staff cannot judge the opening and closing of the knife switch contacts from the outside. [0003] In order to know the opening and closing status of the knife switch contact, the traditional technical means is to install an auxiliary switch inside the mechanism box, connect the knife switch and the auxiliary switch through the transmission mechanism, and use the switching of the auxiliary switch to represent the position of the knife switch contact. ...

AI Technical Summary

Problems solved by technology

However, when the transmission mechanism jams or the auxiliary switch fault light occurs, the contact of the knife switch is not really opened and closed, and the auxiliary switch has been switched at this time, or the switching of the auxiliary switch cannot keep up with the switch of the knife switch. The state transition of the head may easily cause the situation that the opening and closing conditions of the knife switch contacts displayed in the background do not match the actual conditions.

Therefore, the accuracy of the traditional solution to monitor the opening and closing of the GIS knife switch contact is low

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