An insulating cap for a high-current high-voltage circuit breaker

Abstract

The invention discloses an insulating cap of a large-current high-voltage circuit breaker. The insulating cap is formed by a solid epoxy resin material, which is heated to a liquid state, injected into a mold; the insulating cap is a hollow square cap; an inner wall of the hollow cap is provided with an insulating layer; a lower side in the hollow cap is provided with a limiting step; the hollow cap above the limiting step is provided with an opening; a clamping groove is arranged opposite to the limiting step; the thickness of the insulating layer is 1 to 3mm; a tilt angle between the top surface and the horizontal plane of the insulating layer is 15 DEG to 20 DEG; and the clamping groove a semicircular structure which sinks to inside of the hollow cap and has a gap, wherein the diameter of the semicircular structure is consistent with that of a target insulating cylinder. The beneficial effects of the invention are that: the insulating cap is made of the epoxy resin and has the good insulation property; after the circuit breaker is integrally assembled, the insulating cap is buckled with the three-phase insulating cylinder of the circuit breaker, so that the arcing distance of the conductive element to the movable door can be effectively increased; and accordingly, the insulation effect is improved.

Description

technical field [0001] The invention relates to a high-voltage circuit breaker, in particular to an insulating cap of a large-current high-voltage circuit breaker. Background technique [0002] High-voltage circuit breaker, also known as high-voltage switch, is a circuit protection device installed on high-voltage electrical appliances, so it is one of the important electrical components. It can not only cut off or close the no-load current and load current in the high-voltage circuit, but also cut off the overload current and short-circuit current through the function of the relay protection device when the system fails. When high-current high-voltage circuit breakers are applied to high-altitude areas or users have high requirements for insulation, the insulation distance (a+b) between the upper end of the insulation cylinder and the switch cabinet valve is often not enough, resulting in low insulation capacity and unable to meet the use requirements. Contents of the inv...

AI Technical Summary

Problems solved by technology

When high-current high-voltage circuit breakers are applied to high-altitude areas or users have high requirements for insulation, the insulation distance (a+b) between the upper end of the insulation cylinder and the switch cabinet valve is often not enough, resulting in low insulation capacity and unable to meet the use requirements.

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