CN2099378U

CN2099378U - Single pole drop type fuse

Info

Publication number: CN2099378U
Application number: CN 91220841
Authority: CN
Inventors: 曾学军; 周小鸣
Original assignee: HIGH VOLTAGE SWITCH FACTORY
Current assignee: HIGH VOLTAGE SWITCH FACTORY
Priority date: 1991-09-11
Filing date: 1991-09-11
Publication date: 1992-03-18

Abstract

The utility model relates to a single pole drop type fuse, being composed of an insulator, a wire connecting clamp, an upper and a lower contact pieces, a voltage release cap, an upper and a lower contacts, a fuse tube, installation accessories, a diaphragm and a fuse wire. The utility model is characterized in that a single pole structure is used, and the upper terminal of the fuse tube is provided with a voltage release diaphragm and the voltage release cap; the fuse wire is a button fuse, the middle part of the fuse wire is a fuse body, both sides are copper strands, and one end of the copper strand is provided with a fuse wire button. The fuse has the advantages of reasonable design, novel structure, great protective range and reliable performance, and is suitable for protecting an electric power transformer in electric power circuits of 35KV and above.

Description

Single pole drop type fuse

The utility model relates to a kind of single-column fuse switch, and it is mainly used in 35KV and above power supply circuit, makes the usefulness of power trans-former protection.

Known 35KV fuse switch all adopts the queen post structure.Due to its structure, exist bulky, protection range is little, protection poor reliability various symptims and signs of deficiency part.

The purpose of this utility model is a kind of novel structure of design, reasonable, the dependable performance, safe in utilization of structure, and the single-column fuse switch that protection range is big to improve the cost performance of existing fuse, promotes the renewal of product.

Below in conjunction with accompanying drawing the utility model is elaborated:

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is the structural representation of pressure releasing cap in the utility model;

Fig. 3 is the structural representation of fusible link in the utility model.

Referring to accompanying drawing 1-3, the utility model is by insulator 1, binding clip 2,9, upper contact 3, pressure releasing cap 4, upper contact head 5, fusion tube 6, lower contact 7, lower contact 8, installation accessories 10, diaphragm 11, fuse 12 forms, the up and down two ends of described insulator 1 are fixed with upper and lower contact 3,8, and centre is fixed with installation accessories 10; The two ends of fusion tube 6 also are set with upper and lower contact 5,7, button fuse 12 is housed in it, and on the end port that upper contact head 5 is connected with fusion tube 6 release of pressure diaphragm 11 is housed, be installed with pressure releasing cap 4 at release of pressure diaphragm 11, being movable pegging graft between upper contact head 5 and the upper contact 3, is hinge between lower contact 7 and the lower contact 8; Fuse 12 is by fuse button 13, melt 14, copper hinge line 15,15 ' consist of, the two ends of its melt 14 be connected to respectively copper hinge line 15,15 ', the other end of copper hinge line 15 is also buckled 13 affixed with fuse.

Operation principle of the present utility model is described below:

One, when electric line just often, isolation fracture if desired can directly be pulled on the little ring of contact 5 with the insulated hook rod after the excision load, make it disconnection and form obvious isolation fracture.

Two, when electric line is short-circuited fault, melt 14 will fuse, at this moment, bigger as short circuit current, then the gas that its electric arc produced is also many, makes fusion tube 6 internal pressures very big, so that in fusion tube 6 lower port exhausts, also break through release of pressure diaphragm 11, form the two spray of upper and lower port exhaust, thereby reach the purpose of rapid arc extinguishing; When short circuit current hour, its gas production is also little, has only kept certain pressure in the fusion tube 6, by fusion tube 6 lower port exhausts, and can not break through release of pressure diaphragm 11, forms the single port exhaust, also can reach the purpose of rapid arc extinguishing.

In sum; the utility model has been because at the exhaust structure of fuse, technical measures have been taked in aspects such as fuse, thereby has that structure is tightly played, reasonable in design, characteristics such as protection range big, dependable performance; be suitable for 35KV and above power circuit and use, make the usefulness of power trans-former protection.

Claims

1, a kind of single-column fuse switch, it comprises insulator (1), binding clip (2), (9), last contact (3), upper contact head (5), fusion tube (6), following contact (7), following contact (8), installation accessories (10) fuse (12), it is characterized in that it also comprises pressure releasing cap (4), diaphragm (11), the two ends up and down of described insulator (1) are fixed with, following contact (3), (8), centre is fixed with installation accessories (10), the two ends of fusion tube (6) also are with contact (5) up and down, (7), a button silk fuse (12) is housed in it, and on upper contact head (5) and the end port that fusion tube (6) is connected release of pressure diaphragm (11) is housed, on release of pressure diaphragm (11), be installed with pressure releasing cap (4), being movable pegging graft between upper contact head (5) and the last contact (3), is hinged between following contact (7) and the following contact (8);

2, single-column fuse switch as claimed in claim 1, it is characterized in that fuse (12) is made of fuse button (13), melt (14), copper hinge silk (15), (15), the two ends of its melt (14) are connected with copper hinge line (15), (15) respectively, and the other end of copper hinge line (15) is also buckled (13) with fuse affixed.