A protective cover and shell structure for increasing the insulation performance of a contactor

Abstract

A protective cover for increasing the insulating property of a contactor, and a contactor shell structure comprising the protective cover, which are used for preventing operating staff from coming into contact with energized conductors on a housing (1) by mistake. The protective cover comprises walls (21) for wiring protection, which are located at the side facing outwards of each phase of the energized conductor, and a plurality of phase-to-phase insulation walls (22) which are arranged in the walls for wiring protection and form a first encircling structure therewith, wherein the plurality of phase-to-phase insulation walls are uniformly arranged and inserted in a gap between the energized conductor and an insulating blocking wall (11) of the housing to form a shortest electric leakage path starting from the outermost edge position of the energized conductor, rectilinearly creeping along the surface of each of the phase-to-phase insulation walls, and then turning to the upward direction to creep to the innermost edge position of the housing closest to the energized conductor on the housing. On the basis of not increasing the volume of the contactor, the contactor shell structure prolongs the shortest electric leakage distance, and enhances the insulating property of the contactor.

Description

technical field [0001] The invention relates to a contactor, in particular to a protective cover for increasing the insulation performance of the contactor and a shell structure of the contactor with the protective cover, belonging to the technical field of low-voltage electrical appliances. Background technique [0002] A contactor is a non-manually operated mechanical switching device that can carry and frequently switch on and off normal circuit current. With the rapid development of the field of low-voltage electrical appliances, the market has put forward higher requirements for the miniaturization, personalization and insulation performance of contactor products. [0003] A contactor that is widely used at present, such as Figure 1-3 As shown, it includes a shell structure composed of a shell 1 and a protective cover 2, and a number of phase live conductors composed of a tile-shaped terminal screw 3, a contact plate 4, and a wire 5 arranged in the shell structure, whi...

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Problems solved by technology

[0005] For this reason, the technical problem to be solved by the present invention is that in order to enhance the insulation performance of the contactor in the prior art, the size of the shell must be increased, which is not conducive to the problem of miniaturization design. On the basis of the body size, the insulation performance of the contactor is enhanced, which is beneficial to the miniaturization design of the contactor product.

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