An isolating knife interlocking operating mechanism

Abstract

The invention relates the technical field of circuit breakers, and particularly relates to an isolation knife interlocked operation mechanism comprising a chassis. An operation shaft I for driving an isolation knife and an operation shaft II for driving a grounding knife are rotatably installed in the chassis. A limiting disc with a limiting slot is fixed on the operation shaft I. A vertical sliding pin shaft is arranged below the limiting disc. The operation shaft II is provided with a cam. When the grounding knife is closed, the pin shaft is abutted in the limiting slot by the cam, and the operation shaft I of the isolation knife cannot rotate so that the isolation knife is enabled to be in the disconnection state and mechanical interlocking is realized. The mechanical interlocking structure is simplified, low in cost and high in safety and particularly suitable for control and protection of the high voltage side of a prefabricated box type substation specialized for wind power and suitable for high altitude, grass land, desert and other operation environment and can be directly installed in a European transformer high voltage position so that interlocking is perfect and reliable and the performance completely meets the use requirements of a wind power plant.

Description

technical field [0001] The invention relates to the technical field of circuit breakers, in particular to a mechanical interlocking operating mechanism for isolating knives. Background technique [0002] Circuit breakers are electrical equipment often used in high-voltage power distribution systems. They usually include circuit breakers and isolation switches. The functions of circuit breakers are to close the circuit and open the circuit, and it is used The contacts of the circuit or the opening and disconnecting circuit are installed in the vacuum interrupter. When the contacts are closed or opened, arcs are not easy to occur, and the safety performance is very high. The function of the isolation knife switch is to establish a reliable insulation gap and separate the lines with an obvious disconnection point to ensure the safety of operators and equipment. When operating the vacuum circuit breaker to open, you need to operate the circuit breaker to open first, and then op...

AI Technical Summary

Problems solved by technology

[0003] When operating the circuit breaker to close, if the isolating switch is not fully closed, then when the circuit breaker is closed, an arc will be generated at the position where the isolating switch is not fully closed. These arcs will not only damage the equipment, but also cause extreme damage. big security risk

In reality, whether it is a defect in some high-voltage vacuum circuit breaker products or a worker's mistake in operation, it may cause the isolation switch to accidentally conduct the circuit, which will inevitably damage the equipment or cause danger.

Images