CN2417546Y

CN2417546Y - Zero excitation tap changer

Info

Publication number: CN2417546Y
Application number: CN 00208290
Authority: CN
Inventors: 刘刚; 秦伟
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-04-22
Filing date: 2000-04-22
Publication date: 2001-01-31
Anticipated expiration: 2010-04-22

Abstract

The utility model relates to a zero excitation tap changer. The technical key points lie in that a current output structure of moving contacts of the utility model adopts a flexible connection way. The utility model has the advantages that the structure of the contacts is simple, the contact is reliable, the size of the utility model is further reduced, and the manufacture and maintenance are simple and convenient. The utility model is especially suitable for middle and low current switches.

Description

Off circuit tap changer

The utility model relates to a kind of off circuit tap changer that is used for oil-filled transformer, is the improvement to existing switch.

State-of-the-art in the market three-phase cage type end tap changer structure as shown in Figure 3, Figure 4, it realizes electric current output by two groups of axial arranged contacts, again with being fixedly connected 12, exporting 10 of contacts and will all get up with short circuit sheet 13 short circuits between two contacts.This structure makes that the switch axial dimension is bigger than normal, and contact point is many in the loop, poor reliability, and the switch cost is also higher relatively, and therefore supporting volume of transformer becomes big, and cost significantly improves.

The purpose of this utility model has been to avoid above-mentioned deficiency and provides a kind of features simple structure reliability high off circuit tap changer.

The purpose of this utility model is realized by following scheme: have switch transmission detent mechanism 1, upper flange plate 2, lower flange 3, in two ring flanges, be coated with the rotating shaft 5 that drives contact 4, be installed with the insulating bar 7 that fixed contact 6 is housed around the ring flange, by supporter 8 moving contact 4 is housed in the rotating shaft 5, its difference is to be installed with soft connection 11 at

supporter

8 and 10 of output wiring terminals, constitutes the output contact.

In the such scheme, soft connection 11 can constitute with soft copper pool or copper cable or copper litz wire, and this switch cage type body can vertical layout also can horizontally be arranged.

According to such scheme, primary structure of the present utility model is characterised in that to be installed with between supporter 8 and the binding post 10 and softly connects 11, constitutes electric current output contact.When switch needed pressure regulation, by operation transmission detent mechanism 1, rotating shaft 5 drove moving contact 4 and carries out the tap conversion, and with the moving contact motion, the other end then maintains static, and each tap position electric current is spread out of respectively within the specific limits in soft connection 11.When switching current is big, also can several groups of contact parallel connections realize.

Soft connection 11 adopts which kind of material and construction of switch and size of current, voltage just and size and deciding in the such scheme, guarantees soft connection campaign freely, and is unlikely soft and causes and the easy short circuit of other electrified body.This structure of contact terminal can be advantageously used on the various switch contact structures such as positive and negative accent, linear accents, scope accents, thickness accent, end accent, features simple structure, reliably, cost is low, be applicable on the various middle low current off circuit tap changers.

Below in conjunction with accompanying drawing an embodiment of the present utility model is described:

Fig. 1 is the front view of an embodiment of the vertical cage type of three-phase of the present utility model end tap changer.

Fig. 2 is that the A-A of Fig. 1 is to view

Fig. 3 is the front view of existing product

Fig. 4 is the B-B view of Fig. 3

Fig. 5 is the voltage-regulation principle figure (is example mutually with) of present embodiment

Embodiment of the present utility model is illustrated as the vertical cage type of First Five-Year Plan shelves three-phase end tap changer structure chart shown in Fig. 1,2,5.Has switch transmission detent mechanism 1, upper flange plate 2 and lower flange 3, in two ring flanges, be coated with the rotating shaft 5 that drives contact 4, be fixed with 6 insulating bars 7 around the ring flange, wherein fixed contact 6 is housed on 5, fixedly output wiring terminal 10 is housed on another root, supporter 8 is housed in the rotating shaft 5, compresses moving contact 4 by spring 9 on the supporter, dynamic and static contact is engaged,

supporter

8 and 10 of output wiring terminals are fixed with and softly connect 11, and its typical voltage-regulation principle figure as shown in Figure 5.

When the switch pressure regulation is rotated, moving contact 4 switches each fixed contact realizes the tap conversion, soft connection 11 is rotated then with moving contact electric current is exported, and it is a half dynamic and static contact than existing market product, and volume of switch is little, connecting terminal is few, reliability improves, and the switch axial dimension also reduces, and operational torque reduces, loop resistance reduces, and is economical and practical.

Claims

A kind of off circuit tap changer that is used for transformer, has switch transmission detent mechanism 1, upper flange plate 2, lower flange 3, in the middle of ring flange, be coated with the rotating shaft 5 that drives contact 4, the ring flange circumference is provided with the insulating bar 7 that fixed contact 6 is housed, and 4 of rotating shaft and moving contacts are provided with supporter 8, it is characterized in that being fixed with on supporter 8 and the output wiring terminal 10 soft connection 11.