Interlocking device for earthing switch operation of switch cabinet

Abstract

The invention relates to an interlocking device, in particular to an interlocking device for earthing switch operation of a switch cabinet; the technical proposal provided by the invention is that: the interlocking device for earthing switch operation of the switch cabinet comprises an earthing switch operation shaft, an interlocking piece is arranged on the earthing switch operation shaft, an interlocking plate is arranged on a door body of the switch cabinet, and the earthing switch operation shaft is rotated to opening and earthing positions to form clamping and separation of the interlocking piece and the interlocking plate respectively, an interlocking shaft which is parallel to the earthing switch operation shaft, is abutted intermittently with the door body of the switch cabinet and does reciprocating slippage movement along the switch cabinet body is arranged at one side of the earthing switch operation shaft, a baffle block which is extended to the earthing switch operation shaft and forms circumferential shifting when the earthing switch operation shaft is rotated to the earthing position is arranged on the interlocking shaft. By adopting the technical proposal, the interlocking device for earthing switch operation of the switch cabinet, which has compact structure and accurate location of the earthing switch operation shaft, can prevent the earthing switch operationshaft from shifting owning to excessive operating force and improve the safety performance, is provided.

Description

technical field [0001] The invention relates to an interlocking device, in particular to an operation interlocking device for a grounding switch of a switch cabinet. Background technique [0002] The switch cabinet is used to connect, disconnect and protect the power supply line, and cooperate with the relay protection to realize the equipment to cut off the faulty line. The switch cabinet is usually equipped with a grounding switch. When the power supply line or equipment fails and normal maintenance, the grounding switch must be grounded to protect human safety. In power supply lines, it is considered safe only when the grounding switch is grounded. [0003] Because the switchgear is full of high-voltage circuits, it is very dangerous for the operator to open the door of the switchgear when the operating shaft of the grounding switch inside the switchgear is in the off state (the switchgear is powered on). In order to eliminate such safety hazards, Those skilled in the a...

AI Technical Summary

Problems solved by technology

[0005] In the above technical solution, if the driving motor or the manual actuator controlling the operating shaft of the earthing switch is overpowered, it will cause the interlocking part at the operating end of the operating shaft of the earthing switch and the door body of the switch cabinet or on the bracket extending on the door body. The slot or hole is detached or damaged; and the precision of the interlocking part, the operating shaft of the grounding switch and the bracket is high. When the interlocking part falls into the slot or hole on the bracket, its position may be slightly shifted. As a result, the interlocking piece is completely locked after entering the slot or hole on the bracket, and the interlocking piece cannot be disengaged from the slot or hole, making it impossible to open the switchgear door when it needs to be opened

Images