Interlocking device for draw-out switch

Abstract

The invention relates to an interlocking device for a draw-out switching device. The interlocking device comprises a manual driving device and an interlocking device linked with the manual driving device, wherein the interlocking device comprises a pinch plate and a locking plate arranged in the pinch plate; and the manual driving device drives the locking plate to respectively slide to the highest position, the middle position and the lowest position in the pinch plate, so that a turntable A and a turntable B cannot rotate at the same time, and a power supply A and a power supply B cannot be conducted at the same time, that is to say, the power supply A and the power supply B are interlocked mechanically. The interlocking device can be used for automatically retaining states of switching on and switching off the power supply A and the power supply B from the time when a switch body is drawn out from an in-place state to the time when the switch body is inserted in place again, that is to say, a memorizing function is realized; the switch body can be inserted in place again as long as the states of switching on and switching off the power supply A and the power supply B are the same as those of switching on and switching off the power supply A and the power supply B when the switch body is drawn out from the in-place state; therefore, the operation safety is improved greatly; and the risk brought by wrong operation is reduced.

Description

technical field [0001] The invention relates to a withdrawable switching device, more specifically, to an interlocking device for a switch body of a withdrawable switching device. Background technique [0002] In a power supply system with two power supplies (normal power supply and backup power supply, also called A power supply and B power supply), when the power supply is detected to be deviated (such as overvoltage, undervoltage or lack of voltage), the switching device can automatically Convert from one power source to another. When the normal power supply is detected to be back to normal, the switching device can also automatically return to the normal power supply for power supply. When the switching device needs to be inspected and maintained, the bypass switch can be operated to the closed state, and then the changeover switch of the body switch can be disconnected, and the body switch can be pulled out or inserted through a wrench and a handle. [0003] When the ...

AI Technical Summary

Problems solved by technology

[0003] When the switch of the body switches between the A power supply and the B power supply, the electrical safety interlock device electrically interlocks the A power supply and the B power supply so that they cannot be connected at the same time, but there is a risk of failure of the electrical safety interlock device, so It needs to be double interlocked

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