CN202473563U

CN202473563U - Overcurrent self-protecting transformer

Info

Publication number: CN202473563U
Application number: CN2012200770258U
Authority: CN
Inventors: 叶银升; 付德志
Original assignee: CHHG GROUP (ANHUI) ELECTRIC Co Ltd
Current assignee: CHHG GROUP (ANHUI) ELECTRIC Co Ltd
Priority date: 2012-02-22
Filing date: 2012-02-22
Publication date: 2012-10-03
Anticipated expiration: 2022-02-22

Abstract

The utility model relates to an overcurrent self-protecting transformer, which overcomes the defect in the existing transformer protecting technology that the transformer has no self-protecting ability. The utility model adopts the technical scheme that the self-protecting transformer comprises a transformer box body, a coil and a high-voltage binding post. The self-protecting transformer is characterized in that a current limiting fuse is arranged on the high-voltage winding terminal of the transformer coil, and is composed of an insulating tube, a fusing tube, an upper contact head binding post and a lower contact head binding post. The current limiting fuse is fixed on the transformer box body in an embedding mode. The upper contact head binding post and the lower contact head binding post are respectively connected with the high-voltage binding post of the transformer and the high-voltage winding of the coil. The self-protecting transformer has the beneficial effects as follow: when the coil overcurrent is caused by the overload and the short circuit of electric appliances due to the low-voltage winding of the transformer, lightning stroke and the like, the fusing tube of the current limiting fuse in the transformer can be quickly broken off, thereby effectively preventing the transformer coil from being damaged due to the overcurrent failure of the transformer body.

Description

The overcurrent self-protected transformer

Technical field

The utility model belongs to the transformer technology field, is specifically related to a kind of overcurrent self-protected transformer.

Background technology

Power transformer is in running, because most of necessary security safeguard measure that lacks, and often because of low-pressure side electrical appliance overload, short circuit, and the generation of situation such as thunderbolt and cause the coil overcurrent, cause transformer self to damage.Thereby, in this field, be badly in need of a kind of power transformer that runs into overcurrent can self-shield.And prior art mostly is beyond transformer, to use automatic protector; Have DC circuit, carry out switch, door switch, delayer, trigger, current controller and current monitor; Automatically cut off the electricity supply turn-on power again after fault is got rid of when realizing overload, short circuit, thunderbolt through these devices.But this protective device complicated circuit, cost is high, and only can protect the device that links to each other with transformer, and can't realize transformer itself is carried out effective self-shield.

Summary of the invention

The purpose of the utility model is to overcome in the existing tranformer protection technology, and transformer itself does not have the deficiency of self-protection function, provides a kind of ability self to prevent the overcurrent self-protected transformer of coil because of overcurrent damage.

For achieving the above object, the technical scheme of the utility model comprises transformer-cabinet, coil and high tension terminal; It is characterized in that: the high pressure winding terminal at transformer coil is provided with current limiting fuse, and current limiting fuse is made up of insulated tube, fuse tube, following contact binding post and upper contact head binding post; Following contact binding post and upper contact head binding post are separately positioned on the bottom and the top of insulated tube; The fuse tube device is in insulated tube, and the upper contact head of fuse tube is connected with following contact binding post with the upper contact head binding post respectively with following contact; Current limiting fuse is inserted in the transformer-cabinet and is fixed on the transformer-cabinet; The upper contact head binding post is connected with the high tension terminal of transformer and the high pressure winding of coil respectively with following contact binding post.

The beneficial effect of the utility model is: when electrical appliance overload, short circuit occur because of the transformer low voltage winding; And situation such as thunderbolt is when causing the coil overcurrent; The fuse tube of the current limiting fuse that transformer is inner will break off rapidly, effectively prevent the transformer coil damage that transformer body overcurrent fault causes.

Description of drawings

Fig. 1 is the main pseudosection of the utility model;

Fig. 2 is the main pseudosection of current limiting fuse among Fig. 1;

Current limiting fuse winding diagram when Fig. 3 is the high pressure winding star connection of coil;

Current limiting fuse winding diagram when Fig. 4 is the high pressure winding delta connection of coil.

In the accompanying drawing: 1. transformer-cabinet, 2. coil, 3. high tension terminal, 4. current limiting fuse, 5. insulated tube, 6. fuse tube 7. descends the contact binding post, 8. the upper contact head binding post.

Embodiment

As shown in Figure 2, current limiting fuse 4 is made up of insulated tube 5, fuse tube 6, following contact binding post 7 and upper contact head binding post 8.Following contact binding post 7 and upper contact head binding post 8 are separately positioned on the bottom and the top of insulated tube 5; Fuse tube 6 devices are in insulated tube 5, and the upper contact head of fuse tube 6 is connected with following contact binding post 7 with upper contact head binding post 8 respectively with following contact.

As shown in Figure 1, current limiting fuse 4 is inserted in the transformer-cabinet 1 and is fixed on the transformer-cabinet 1; Upper contact head binding post 8 is connected with the high tension terminal 3 of transformer and the high pressure winding of coil 2 respectively with following contact binding post 7.

As shown in Figure 3, when the high pressure winding of transformer coil 2 was star connection, the three-phase high-voltage circuit through high tension terminal 3 introducing transformers was connected with the three-phase high-voltage windings in series of coil 2 respectively through current limiting fuse 4.

As shown in Figure 4, when the high pressure winding of transformer coil 2 is delta connection,, connect with three-phase high-voltage winding per two contact mutually of coil 2 respectively through current limiting fuse 4 through the three-phase high-voltage circuit of high tension terminal 3 introducing transformers.

Claims

1. the overcurrent self-protected transformer comprises transformer-cabinet (1), coil (2) and high tension terminal (3); It is characterized in that: the high pressure winding terminal at transformer coil (2) is provided with current limiting fuse (4); Current limiting fuse (4) is inserted in the transformer-cabinet (1) and is fixed on the transformer-cabinet (1); Upper contact head binding post (8) is connected with the high tension terminal (3) of transformer and the high pressure winding of coil (2) respectively with following contact binding post (7).

2. overcurrent self-protected transformer according to claim 1 is characterized in that: current limiting fuse (4) is made up of insulated tube (5), fuse tube (6), following contact binding post (7) and upper contact head binding post (8); Following contact binding post (7) and upper contact head binding post (8) are separately positioned on the bottom and the top of insulated tube (5); Fuse tube (6) device is in insulated tube (5), and the upper contact head of fuse tube (6) is connected with following contact binding post (7) with upper contact head binding post (8) respectively with following contact.