Mechanical interlocking device of dual-power switching load switch

Abstract

The invention relates to medium-voltage electrical switch equipment, and discloses a mechanical interlocking device of a dual-power switching load switch. An interlocking crank arm is pivoted to a plate surface, far away from an operation box, of a fixed plate, and a first induction crank arm and a second induction crank arm extend from two ends of the interlocking crank arm respectively; an interlocking baffle is pivoted to the plate surface, close to the fixed plate, of a mounting plate, and a first baffle and a second baffle extend from the two ends of the interlocking baffle and correspondto a first operation hole and a second operation hole respectively; and a first receding groove and a second receding groove are arranged below the first baffle and the second baffle correspondingly.According to the mechanical interlocking device of the dual-power switching load switch, besides mechanical interlocking between two load switch main shafts, the interlocking is also arranged on theoperation hole of the operation mechanism, and when one load switch operating mechanism is in a closed state, the operation hole of the operating mechanism of the other load switch is shielded and anoperating rod cannot be inserted into the operation hole so that the operating mechanism is prevented from being damaged during misoperation.

Description

Technical field [0001] The invention relates to a medium voltage electrical switchgear, in particular to a mechanical interlocking device for a dual power supply switching load switch. Background technique [0002] In the power network, there are many users who have high requirements for power supply reliability, such as coal mines and oil refineries. Once a power outage occurs in these units, it will cause major economic losses to the unit and even cause casualties. Therefore, the power supply in these units In the system, both main power supply and backup power supply are required. When the main power supply fails, the backup power supply must be immediately put in to restore power. In order to achieve the above purpose, it is necessary to switch between the main power source and the standby power source through a dual power source switching mechanism. [0003] The mechanical interlock of the traditional dual power switching mechanism (ie dual power switching load switch) gener...

AI Technical Summary

Problems solved by technology

[0003] The mechanical interlock of the traditional dual power switching mechanism (i.e. dual power switching load switch) generally adopts the mechanical interlock between the main shafts of the two load switches. When one load switch is in the closed state, the other load switch operating mechanism The operating rod cannot perform the closing operation

But at this time, if the operating rod is inserted into the operating hole forcibly for operation, the operating mechanism will be damaged, so there is still room for improvement

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