A compression spring return circuit breaker insulation automatic protection device

Abstract

The invention provides an automatic insulation protecting device for a compression spring resetting type breaker and belongs to the field of machines. A lower support is arranged at the static contact end of a switch body support. A front support is arranged on the lower support. Fixed pulleys are arranged at the front side of the front support. A wire guide plate is arranged on the upper portion of the front support. A protecting sleeve rod is arranged at the upper end of the front support. The upper end of the protecting sleeve rod and the upper end of the front support are hinged into one through a hinge. A static contact protecting sleeve is arranged at the position, corresponding to the static contact position, of the head end of the protecting sleeve rod. A rope fixing ring is arranged on an operation handle rotating rod. A rope is arranged, and the head end of the rope is fixedly connected with the tail end of the protecting sleeve rod. The rope sequentially penetrates through the fixed pulleys of the rope guide plate, the front support and the body support. The tail end of the rope is fixedly connected to the rope fixing ring in a winding mode. The portion, between the tail end of the protecting sleeve rod and the front support, of the rope is sleeved with a spring. The automatic insulation protecting device is capable of acting in harmony with on / off operation of a switch is arranged, and therefore the technical effect of breaker protection is achieved.

Description

technical field [0001] The invention belongs to the field of machinery, and in particular relates to a protection device for a static contact of a high-voltage AC vacuum circuit breaker. Background technique [0002] The ZW32E-12 circuit breaker is an intelligent outdoor post-mounted high-voltage AC vacuum circuit breaker developed by the applicant. [0003] This type of circuit breaker adopts a three-phase solid-sealed pole structure. The vacuum interrupter adopts longitudinal magnetic field arc extinguishing technology, uses silicone rubber / epoxy resin solid insulation, and uses a combination of spring operating mechanism and permanent magnet mechanism to make it have a large volume. The advantages of small size and light weight can not only be opened and closed remotely by the controller, but also can be opened and closed manually in an emergency on the spot or when the controller is out of power. Its permanent magnet mechanism adopts a linear transmission method, which ...

AI Technical Summary

Problems solved by technology

Since the static contact is exposed outdoors upwards, it is easy to accumulate rainwater or dust particles in the air, forming stains and eroding the static contact, increasing its surface contact resistance and affecting its contact effect. When the operating current of the transmission line is large, the heat generation will increase sharply due to the increase of the contact resistance and the deterioration of the contact effect. In severe cases, melting and adhesion will occur due to the high temperature rise between the static and moving contacts , affecting the normal operation of the entire switch or even equipment accidents, resulting in the interruption of normal power supply, affecting the normal operation of the power transmission circuit or transmission line

[0008] The static contacts of the existing isolating switches need to be cleaned and anti-oxidized regularly. On the one hand, the daily maintenance workload of the power supply equipment is increased. The constant erosion will also increase the contact resistance between the dynamic and static contacts, which will bring hidden dangers to the safe operation of the equipment

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