A torsion spring pop-open circuit breaker insulation automatic protection device

Abstract

The utility model relates to an insulation automatic protection device of a torsion spring pop-open type circuit breaker, which belongs to the mechanical field. It sets a lower bracket at the static contact end of the main bracket of the switch; a front bracket is set on the lower bracket; a guide cable upper and a lower fixed pulley are respectively arranged on the upper and lower parts of the front bracket, and an upper support plate is arranged on the upper part of the front bracket; A protective sleeve rod is arranged on the upper end of the front bracket, and the protective sleeve rod and the upper support plate are hinged as a whole through a hinge; a torsion spring is set on the hinge; Contact protection sleeve; a rope fixing ring is arranged on the operating handle rotating rod; a rope is arranged, the head end of the rope is fixedly connected with the middle end of the protection sleeve rod, and the rope passes through the upper fixed pulley, the upper support plate, and the guide rope in turn. Set the pulley and the main body support; the end of the rope is wound and fixed on the rope fixing ring. Use the steps of "withdrawing the protective cover, closing the switch" and "opening the switch, covering with the protective cover" to achieve the effect of automatic protection.

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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