Circuit breaker interlocking device

Abstract

The invention discloses a circuit breaker interlocking device, relates to an interlocking device of an electric switch, in particular relates to interlocking between a circuit breaker and an isolating switch, and aims to provide the circuit breaker interlocking device, which is simple in structure, and easy to process and assemble. The circuit breaker interlocking device comprises a supporting seat (1), a pressing rod (2), an interlocked circuit breaker switch-on locking connecting rod (21), a pressing rod top plate (22), a supporting frame (3), a square connecting rod (4), a baffle (41), an isolating switch operating shaft sleeve (5), a flange plate (51) and a connecting rod (6), wherein the connecting rod is rotatably inserted into at least two supporting bending plates (7); a first crank arm plate (61) is fixedly arranged on the connecting rod; a first crank arm plate movable groove (11) is formed in the rear end surface of the supporting seat; an elongated circular hole is formed in the first crank arm plate; the lower end of the square connecting rod is connected to the elongated circular hole through a pin shaft; a second crank arm plate (62) is fixedly arranged at the right end of the connecting rod; and an interlocked circuit breaker spindle crank arm connecting rod (9) is connected to the second crank arm plate.

Description

technical field [0001] The invention relates to an interlocking device for an electric switch, in particular to an interlocking device for a circuit breaker and a disconnector. Background technique [0002] XGN15-12 unit type SF6 ring network cabinet is suitable for AC 50HZ, 12KV power system, widely used in industrial and civil cable ring network and power supply terminal, especially suitable for the following places: power distribution in urban residential areas, small secondary substations, Switchgear, industrial and mining enterprises, shopping malls, airports, subways, wind power, hospitals, stadiums, railways, tunnels, etc. [0003] At present, the main power supply scheme of the traditional XGN15-12 ring network cabinet is SF6 load switch or SF6 load switch fuse combination appliance. The load switch cannot break the fault current. Although the load switch fuse combination can break the short-circuit fault and ground fault, its rated current is limited by the capacit...

AI Technical Summary

Problems solved by technology

The load switch cannot break the fault current. Although the load switch fuse combination can break the short-circuit fault and ground fault, its rated current is limited by the capacity of the fuse, and the rated current can only be 125A.

This means that transformers with a capacity above 1250KVA will not be able to protect

The traditional fixed circuit breaker cabinet is bulky and occupies a large area, which is not suitable for use in pre-installed switchgear such as box-type substations and box-type switching stations.

Although there are circuit breaker solutions derived from the XGN15-12 cabinet type on the market, the interlock mechanism and the circuit breaker need to be specially made, and the research and development costs and production costs are high

The current circuit breaker interlocking mechanism has a complex structure and is not easy to produce, process and assemble

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