Torsion spring bouncing-type circuit breaker insulated automatic protection device

Abstract

The invention discloses a torsion spring bouncing-type circuit breaker insulated automatic protection device, which belongs to the mechanical field. A lower support is arranged at a static contact end of a switch main body support; a front support is arranged on the lower support; a pilot rope upper fixed pulley and a pilot rope lower fixed pulley are arranged on the upper part and the lower part of the front support respectively; an upper supporting plate is arranged at the upper part of the front support; a protection sleeve rod is arranged at the upper end of the front support; the protection sleeve rod and the upper supporting plate are hinged as a whole via a hinge; the hinge is sleeved with a torsion spring; a static contact protection sleeve is arranged at the head end, corresponding to the static contact position, of the protection sleeve rod; a rope fixing ring is arranged on an operation handle rotation rod; and a rope is arranged, the head end of the rope is fixedly connected with the middle end of the protection sleeve rod, the rope sequentially passes through the pilot rope upper fixed pulley, the upper supporting plate, the pilot rope lower fixed pulley and the main body support, and the tail end of the rope is fixedly wound on the rope fixing ring. A step of removing the protection sleeve and closing the switch and a step of opening the switch and covering the protection sleeve are carried out for achieving automatic protection effects.

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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