Tool and method for replacing closing holding latch of 3AV3 mechanism

Abstract

The invention relates to a replacement tool and a replacement method for a closing holding latch of a 3AV3 mechanism. The replacement tool comprises a fixed supporting rod and a rotary supporting rod which abut against two frame side plates respectively. The fixed supporting rod comprises a positioning block and a connecting sleeve fixedly connected to one end of the positioning block; the rotary supporting rod comprises an operating rod, a rotary supporting block coupled to one end of the operating rod and a screw rod fixedly connected to the other end of the operating rod, the operating rod is provided with at least two parallel operating surfaces, the screw rod is in threaded connection with the connecting sleeve, and the fixed supporting rod is further fixedly connected with an opening pressing plate pressed on the opening button. A limiting mechanism for limiting the rotation of the fixed supporting rod is arranged on the side plate of the frame; the operating rod is sleeved with the protective sleeve, the telescopic electromagnet drives the protective sleeve to avoid the operating rod, a power line of the telescopic electromagnet is connected with the energy storage state detection switch in series, and the switching-on holding latch replacement tool is simple in structure, convenient to operate, stable and reliable and is provided with a switching-off state and non-energy-storage state confirmation mechanism before operation.

Description

technical field [0001] The invention relates to the field of circuit breakers, in particular to the field of circuit breaker disassembly and assembly, in particular to a 3AV3 mechanism closing and holding catcher replacement tooling and replacement method. Background technique [0002] The circuit breaker equipped with the 3AV3 circuit breaker mechanism needs to be replaced due to the wear and tear of the mechanism components and the matching tolerance and other problems, which cause the closing detent to affect the normal opening and closing operation. In the traditional replacement method, the 3AV3 circuit breaker mechanism needs to be disassembled as a whole. And because the 3AV3 circuit breaker mechanism is located below the intermediate phase B-phase solid-sealed pole, the mechanism mounting screws are located at the bottom of the solid-sealed pole. Therefore, if you need to remove the 3AV3 circuit breaker mechanism, you must first remove the B-phase pole, and due to t...

AI Technical Summary

Problems solved by technology

Therefore, if you need to remove the 3AV3 circuit breaker mechanism, you must first remove the B-phase pole, and because the solid-sealed pole is large in size and high in weight, at least 2 people can complete the disassembly process of the solid-sealed pole at the same time

[0003] It is also possible to stretch out the two frame side plates of the circuit breaker, so as to directly take out the closing latch, but there is no special tool for stretching the frame side plates outward, and the circuit breaker must be It is in the open state and the non-energy storage state. There is no state confirmation mechanism when disassembling and assembling, which may easily lead to closing operation or energy storage state operation, resulting in safety accidents

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