Voltage transformer ground switch anti-misoperation device

Abstract

The invention discloses a voltage transformer ground switch anti-misoperation device and belongs to the technical field of electric power. Quite a few switching field transformation switches comprise double ground switches; a transformation side ground switch can switch on the ground switch when the switch is switched off, but multiple factors are needed to be considered at a bus side, for instance, whether a bus side ground switch can be switched on cannot be reliably determined by only checking the electricity through the bus. The invention discloses a voltage transformer ground switch anti-misoperation device, which consists of a mechanical transmission mechanism, a blocking mechanism and a control circuit, and is characterized in that: a voltage relay blocking contact 3 is connected in series in the control circuit; and a voltage relay 1 is mutually connected with a system bus voltage transformer. If voltage is present on the bus when the grounding and other faults occur in the system, the device disconnects a transformation side ground switch operating loop. Therefore, the operation on the transformation side ground switch is locked, and the ground switch with load is prevented from being switched on.

Description

technical field [0001] The invention relates to an anti-misoperation device for a voltage transformer grounding knife switch, which belongs to the field of electrical technology. Background technique [0002] With the increase of power load, the system is getting bigger and bigger, and the security situation is getting more and more severe. At present, the functions of the primary equipment normally configured are more and more comprehensive. For example, some switches have double ground switches. More factors need to be considered. For example, the voltage transformer switch in the switchyard has double ground switches. The ground switch on the pressure change side can be connected to the ground switch when the switch is in position. But on the bus side, many factors need to be considered. For example, only by The bus voltage test cannot reliably determine whether the bus side grounding knife can be closed, so other methods are needed to accurately determine the operation m...

AI Technical Summary

Problems solved by technology

[0002] With the increase of power load, the system is getting bigger and bigger, and the security situation is getting more and more severe. At present, the functions of the primary equipment normally configured are more and more comprehensive. For example, some switches have double-ground switch configurations. More factors need to be considered. For example, the voltage transformer switch in the switchyard has double ground switches. The ground switch on the pressure change side can be connected to the ground switch when the switch is in position. But on the bus side, many factors need to be considered. The bus power inspection cannot reliably determine whether the grounding knife on the bus side can be closed, so other methods are needed to accurately determine the operating mode

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