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Dropping type fuse

A drop-type fuse, fuse-carrying technology, applied in electrical components, protection switch operation/release mechanisms, circuits, etc., can solve problems such as large operating force, increase contact pressure, increase arc extinguishing effect, and reasonable structure. Effect

Inactive Publication Date: 2011-01-05
浙江赛菲特电气有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The upper contact seat of the drop-out fuse in the prior art generally can only move up and down, and a large operating force is required when the fuse-carrying parts are closed and opened.

Method used

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Examples

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Embodiment Construction

[0050] The technical solution of the present invention is described below by specific embodiments in conjunction with the accompanying drawings:

[0051] see figure 1 , The conventional drop-out fuse includes a fuse-carrying part 1, a lever mechanism 2, upper and lower contact seats 3, 4, an opening and closing mechanism 5, an insulator 6, upper and lower terminals 7, 8 and upper and lower inserts 9, 10, wherein the opening and closing mechanism 5 is connected to the upper insert 9, and the upper contact seat 3 is connected to the upper terminal 7.

[0052] see again figure 2 , the linkage structure of the upper contact seat and the opening and closing mechanism used in the drop-out fuse of the present invention, the upper contact seat 3 is movably connected with the opening and closing mechanism through a linkage pin 23 .

[0053] The upper contact seat 3 includes an upper bracket 31, a spring seat 32, a guide rod 33, an upper contact seat body 34 and a stage clip 35, wher...

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Abstract

The invention discloses a dropping type fuse, comprising a fuse holder, an upper contact seat, a lower contact seat, a switching on / off mechanism, an isolator, an upper wiring terminal, a lower wiring terminal, an upper insert and a lower insert. The upper end of the fuse holder is in opening / closing connection with the upper contact seat, the lower end of the same is rotatably connected with the lower contact seat, the fuse holder comprises a fuse pipe, a lever mechanism arranged on the upper part of the fuse pipe, an upper contact arranged on the upper end of the lever mechanism, a lower connection sleeve sleeved on the lower part of the fuse pipe and a lower contact connected on the lower connection sleeve, the upper contact seat is connected with the upper wiring terminal, the switching on / off mechanism is connected with the upper insert, the upper contact seat is movably connected with the switching on / off mechanism through a linkage pin, the upper contact comprises an upper bracket, a spring seat, a guide rod, an upper contact seat body, and a pressure spring, and the switching on / off mechanism comprises a tripping device, a locking device, a resetting device and a guiding structure. The invention ensures that the switching on / off operations is more labor-saving through the measures of changing the motion mode of the upper contact seat, additionally arranging the switching on / off mechanism and the like.

Description

technical field [0001] The invention relates to a dropout fuse. Background technique [0002] Drop-out fuse is the most commonly used short-circuit protection switch for branch lines of 10kV distribution lines and distribution transformers. It is economical, easy to operate, and adaptable to outdoor environments. It is widely used in 10kV distribution lines and power distribution The primary side of the transformer is used for protection and equipment switching and switching operations. Its working principle is: put the fuse wire into the fuse tube, tighten both ends, and make the fuse located above the middle of the fuse tube, and the upper moving contact will tilt up perpendicular to the fuse tube due to the tension of the fuse. , use the insulating pull rod to push the upper contact into the upper contact seat, into a closed state (closing state) and maintain this state. When the protected line fails and the fault current blows the fuse, an arc is formed, and the arc su...

Claims

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Application Information

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IPC IPC(8): H01H71/20H01H85/54
Inventor 陆敏强
Owner 浙江赛菲特电气有限公司
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