CN2363379Y

CN2363379Y - Drop type fuse

Info

Publication number: CN2363379Y
Application number: CN 98251794
Authority: CN
Inventors: 张立平
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-12-31
Filing date: 1998-12-31
Publication date: 2000-02-09
Anticipated expiration: 2008-12-31

Abstract

The utility model relates to an outdoor high voltage falling type fuse, which improves the traditional structure and adopts a conducting contact head with step hole grooves, and the hole groove with a large caliber of the fuse can be tightly screwed and connected with a standard fuse, and the hole groove with a small caliber can be assembled to fasten an ordinary fuse, and therefore, the compatibility of products is improved. On the other hand, the utility model adopts the superposition vertical down pressing contact of a pressure spring, the conducting contact head and a centerline of an arc-extinguishing tube, so the contact pressure of conducting parts is enhanced, and the rated operating current is enhanced, and meanwhile, the rapidity and the reliability of disjunction are ensured.

Description

Fuse switch

The utility model relates to the short circuit and the overload protection arrangement of Allocation transformer system, particularly a kind of outdoor high-voltage drop type fuse.

At present, fuse switch mainly is made of porcelain insulator and arc-extinguishing tube, tripping mechanism etc., and when Allocation transformer system operate as normal, fuse makes arc-extinguishing tube and tripping mechanism locking, and conductive contact is in "on" position; In case the Allocation transformer system breaks down, fuse failure, tripping mechanism discharges, and arc-extinguishing tube utilizes the gravity of self and the pressure of fixed contact to fall, and makes the disconnection of Allocation transformer system, separating brake.But traditional conductive contact or only be fit to the installation of standard fusible link, or only be applicable to the connection of common traditional fusible link, the structure of conductive contact is incompatible for another kind of fusible link, this brings inconvenience for installing and using of user.On the other hand, the clamping structure of conductive contact and fixed contact is unreasonable, causes the clamping pressure of fixed contact not make rated operational current restricted greater than the deadweight of arc-extinguishing tube, and clamping force arrange unreasonable, often cause arc-extinguishing tube to come off voluntarily easily or tripping mechanism is failure to actuate.

The purpose of this utility model is for overcoming above-mentioned the deficiencies in the prior art part, provides a kind of to the fusible link compatibility is good, conductive capability is strong, breaking capacity is strong fuse switch.

The purpose of this utility model is achieved by the following technical solution: fuse switch includes porcelain insulator, a part, tripping mechanism, arc-extinguishing tube, conductive contact and conductive pressing plate etc., special feature is to have the ladder hole slot in the conductive contact, and bigbore hole slot can screw with arc-extinguishing tube and standard fusible link and be connected; Small-bore hole slot then can hold common fusible link, and securing member can be fastenedly connected common fusible link by the radially installing hole on the small-bore hole slot.Further, on the part stage clip is housed, conductive pressing plate closely is connected with conductive contact under the elastic force effect of stage clip, and the central lines of the center line of stage clip and conductive contact, arc-extinguishing tube.

Below in conjunction with drawings and Examples structure of the present utility model and advantage are elaborated.

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

Fig. 2 is the schematic diagram of conductive contact installation code fusible link;

Fig. 3 is the schematic diagram that conductive contact is installed common fusible link.

Referring to Fig. 1, Fig. 2, present embodiment is by porcelain insulator 1, tripping mechanism 3, arc-extinguishing tube 4, standard fusible link 8, be loaded on the conductive contact 5 of arc-extinguishing tube 4 upper ends, prop up part 2, be fixed in formations such as conductive pressing plate 11 on the part 2 and stainless steel stage clip 12, have ladder hole slot 6 in the conductive contact 5, bigbore hole slot forms with arc-extinguishing tube 4 and is threaded, and the standard fusible link 8 in the arc-extinguishing tube 4 can be compressed connection (as shown in Figure 2) after screwing, and standard fusible link 8 is fastening with tripping mechanism 3 below arc-extinguishing tube 4, make tripping mechanism 3 be in locking state, and arc-extinguishing tube 4 is vertically erected.On the other hand, conductive contact 5 closely contacts with conductive pressing plate 11 under the effect of stainless steel stage clip 12, because the force direction of stage clip 12 and the central lines of arc-extinguishing tube 4, the elastic force that stage clip 12 produces is big more, conductive contact 5 is just big more with the contact pressure of conductive pressing plate 11, conductive capability is also strong more, in case fusible link 8 blows, when tripping mechanism 3 discharges, the disjunction power of arc-extinguishing tube 4 is also big more.Therefore, as long as the holding capacity of fusible link 8 allows, can form very big contact pressure between conductive contact 5 and the conductive pressing plate 11, the rated operational current of present embodiment fuse improves more than 50% than traditional product, reaches more than the 300A.

Referring to Fig. 1 and Fig. 3, except that the foregoing description adopts the standard fusible link, the utlity model has compatibility preferably, promptly under the situation that does not have the standard fusible link, can also assemble common fusible link 7.Can just hold common fusible link 7 in the small-bore hole slot design in the conductive contact 5.And the footpath of small-bore hole slot upwards has an installing hole 10, after common fusible link 7 inserts small-bore hole slot through arc-extinguishing tube 4, securing member 9 can screw in and common fusible link 7 is compressed connection (as shown in Figure 3), make fuse simultaneous adaptation assemble the fusible link of various criterion, install and use very convenient.

In sum, the utlity model has obvious advantage:

1, Products Compatibility is good, both can install and use the standard fusible link, also can assemble common molten Fracture of wire;

2, stage clip adopts vertical press-down type to contact with conductive pressing plate, conductive contact, strengthens contact Pressure, improved rated operational current;

3, contact pressure is big more, and the disjunction power that produces when tripping mechanism is discharged is also big more, when having guaranteed disjunction rapidly, reliable;

4, strutting piece of the present utility model, standard component adopt stainless steel material, and conductive component is also done the surface and handled, and reduces contact resistance greatly, has improved useful life.

Claims

1, fuse switch, include porcelain insulator (1), a part (2), tripping mechanism (3), arc-extinguishing tube (4), conductive contact (5) and conductive pressing plate (11) etc., it is characterized in that: have ladder hole slot (6) in the conductive contact (5), bigbore hole slot can screw with arc-extinguishing tube (4) and standard fusible link (8) and be connected; Small-bore hole slot then can hold common fusible link (7), and securing member (9) can be fastenedly connected common fusible link (7) by the radially installing hole (10) on the small-bore hole slot.

2, fuse switch according to claim 1, it is characterized in that on the part (2) stage clip (12) being housed, conductive pressing plate (11) closely is connected with conductive contact (5) under the elastic force effect of stage clip (12), and the central lines of the center line of stage clip (12) and conductive contact (5), arc-extinguishing tube (4).