Insulation protection arc suppression type drop fuse switch

Abstract

The invention relates to an insulation protection arc-extinguishing drop-out fuse switch which comprises a drop-out fuse switch body (1) and a fuse tube (2). The upper end of the insulator (11) of the drop-out fuse switch body (1) is provided with a power-supply-side static contact insulation protection rack (14), and the lower end is provided with a load-side static contact insulation protection rack (19). The upper end of the insulation tube (21) of the fuse tube (2) is provided with a power-supply-side moving contact insulation protection rack (25), and the lower end is provided with a load-side moving contact insulation protection rack (26). The fixed insulator (27) of the load-side moving contact insulation protection rack (26) is fixedly mounted at the lower end of the insulation tube (21). A movable insulator (28) is hinged with the fixed insulator (27). The insulation protection arc-extinguishing drop-out fuse switch has advantages of high insulation protection performance, effective prevention for grounding and interphase shortcircuit or human electric shock accident, automatic fuse tube falling in fusing break of the fuse, effective prevention for fuse tube damage caused by continuous electric arc generation in the fuse tube, no electric charge of the fuse tube in detachment of the fuse tube, and low danger in operation.

Description

technical field

[0001] The invention relates to electrical equipment, in particular to a drop-out fuse switch. Background technique

[0002] As a commonly used electric device, the drop-out fuse switch has been used for 60 years. It has been widely used due to its advantages of simple operation and convenient replacement of fuses. However, the insulation protection of the traditional drop switch is not good. The exposed parts of the insulator and the upper and lower ends of the fuse tube are conductors. Urban high-altitude parabolic objects and urban garden trees may touch the conductor of the drop switch in windy and rainy weather, resulting in grounding and phase-to-phase short circuit. or personal electric shock accident. When the drop switch operator of the existing structure closes the switch, it is easy for the moving contact on the power supply side to be inaccurately aligned with the static contact on the power supply side, resulting in incomplete closing, which wil...

Examples

Embodiment Construction

[0007] Such as figure 1 As shown, it includes a drop switch body 1 and a fuse tube 2. The drop switch body 1 includes an insulator 11, a power side static contact 12 and a load side static contact 13. The fuse tube 2 includes an insulating tube 21, a fuse 22. The moving contact 23 on the power supply side and the moving contact 24 on the load side, the upper end of the insulator 11 is fixedly installed with the insulating protective frame 14 for the static contact on the power supply side made of insulating material, and the static contact 12 on the power supply side is installed on the static Inside the contact insulation protection frame 14, the static contact insulation protection frame 14 on the power supply side is provided with one end pressed against the back side of the mating surface of the power supply side static contact 12 and the power supply side moving contact 23, and the other end pressed against the power supply side static contact. The contact compression spr...

technical field

[0001] The invention relates to electrical equipment, in particular to a drop-out fuse switch. Background technique

[0002] As a commonly used electric device, the drop-out fuse switch has been used for 60 years. It has been widely used due to its advantages of simple operation and convenient replacement of fuses. However, the insulation protection of the traditional drop switch is not good. The exposed parts of the insulator and the upper and lower ends of the fuse tube are conductors. Urban high-altitude parabolic objects and urban garden trees may touch the conductor of the drop switch in windy and rainy weather, resulting in grounding and phase-to-phase short circuit. or personal electric shock accident. When the drop switch operator of the existing structure closes the switch, it is easy for the moving contact on the power supply side to be inaccurately aligned with the static contact on the power supply side, resulting in incomplete closing, which wil...

Examples

Embodiment Construction

[0007] Such as figure 1 As shown, it includes a drop switch body 1 and a fuse tube 2. The drop switch body 1 includes an insulator 11, a power side static contact 12 and a load side static contact 13. The fuse tube 2 includes an insulating tube 21, a fuse 22. The moving contact 23 on the power supply side and the moving contact 24 on the load side, the upper end of the insulator 11 is fixedly installed with the insulating protective frame 14 for the static contact on the power supply side made of insulating material, and the static contact 12 on the power supply side is installed on the static Inside the contact insulation protection frame 14, the static contact insulation protection frame 14 on the power supply side is provided with one end pressed against the back side of the mating surface of the power supply side static contact 12 and the power supply side moving contact 23, and the other end pressed against the power supply side static contact. The contact compression spr...

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