CN202258840U

CN202258840U - Single-break on-load capacitance-regulating switch

Info

Publication number: CN202258840U
Application number: CN2011202854249U
Authority: CN
Inventors: 邹鹏; 贾继莹; 栾大利; 赵悦欣
Original assignee: LIAONING JINLI ELECTRIC POWER EQUIPMENT CO Ltd
Current assignee: LIAONING JINLI ELECTRIC POWER EQUIPMENT CO Ltd
Priority date: 2011-08-08
Filing date: 2011-08-08
Publication date: 2012-05-30
Anticipated expiration: 2021-08-08

Abstract

The utility model provides a single-break on-load capacitance-regulating switch. In order to accomplish a switching task of windings of a transformer when the transformer is on-load, the technical problem that an arc cannot be reliably extinguished by a high-voltage-side contact during star-delta switching is required to be solved. The single-break on-load capacitance-regulating switch is characterized by comprising two main contact connecting lines, a transition contact connecting line and a driving device, wherein a transition resistor is arranged on the transition contact connecting line and connected with a second vacuum arc extinguish chamber in series; the two main contact connecting lines comprise a delta main contact connecting line with a first vacuum arc extinguish chamber and a star main contact connecting line with a third vacuum arc extinguish chamber; and the driving device drives all vacuum arc extinguish chambers. The single-break on-load capacitance-regulating switch has the advantage that: with only one break, the arc can be reliably extinguished.

Description

The loaded capacity-regulated switch of single break

Technical field

The utility model relates to the loaded capacity-regulated switch that uses on a kind of transformer.

Background technology

The method of at present under the situation of not cutting off transformer frequency response, transformer being implemented variable star angle is, earlier will original star connects or corner connection is broken off, and behind the breath arc that waits for a period of time (duration of a few tens of milliseconds), the process switch is connected into corner connection to transformer or star connects again.In such operating process, that breaks off transformer can produce switching overvoltage in a flash, and can produce impact when inserting transformer once more.The period of waiting for arc extinguishing simultaneously also can be caused the time-out of power supply.Transformer has the task switching that will accomplish Transformer Winding when carrying, and technical difficult points is: can realize blow-out reliably when the high-pressure side contact switches at the star angle.For this reason, CN101692393A has proposed the technical scheme of series connection multi-break, and this scheme can realize blow-out reliably.

Summary of the invention

Equally, blow-out reliably when switching for realization star angle, the purpose of the utility model is to provide a kind of loaded capacity-regulated switch of single break.

The purpose of the utility model is achieved in that it comprises main contact line and transition contact line, is characterized in that: have transition resistance to connect with second vacuum interrupter on the said transition contact line; Said main contact line has two, and one is the corner connection main contact line that has first vacuum interrupter, and one is the star main contact line that has the 3rd vacuum interrupter; It drives the drive unit of all vacuum interrupter Push And Releases in addition.

During corner connection, drive unit makes the disconnection of the second and the 3rd vacuum interrupter, first vacuum interrupter closure, and promptly corner connection main contact line is connected, and all the other two lines break off, and this moment, transformer was the corner connection state.In the time of need corner connection being become star and connects, drive unit successively will:

First and second vacuum interrupters are closed, and the 3rd vacuum interrupter breaks off;

Second vacuum interrupter is closed, and the first and the 3rd vacuum interrupter breaks off;

The second and the 3rd vacuum interrupter is closed, and first vacuum interrupter breaks off;

The 3rd vacuum interrupter is closed, and first and second vacuum interrupters break off.Become star and connect this moment.

Step was opposite when the star angle connect.

When the utility model switched at the star angle, fracture was realized blow-out reliably in vacuum interrupter.

Compared with prior art, the beneficial effect of the utility model is: only establish a fracture, just can realize blow-out reliably.

Description of drawings

Further specify the utility model below in conjunction with accompanying drawing.

Fig. 1 is the electrical schematic diagram of the utility model corner connection when being applied on the transformer.

Fig. 2 is the structural representation of the utility model when Fig. 1 state.

To be Fig. 1 take over the electrical schematic diagram of state (to call transition state in the following text) I when crossing to star to Fig. 3.

Fig. 4 is the sketch map of the utility model when Fig. 3 state.

Fig. 5 is the electrical schematic diagram of Fig. 1 when the transition state II.

Fig. 6 is the structural representation of the utility model when Fig. 5 state.

Fig. 7 is Fig. 1 electrical schematic diagram when the transition state III.

Fig. 8 is the structural representation of the utility model when Fig. 7 state.

Fig. 9 is Fig. 1 electrical schematic diagram when star connects.

Figure 10 is the structural representation of the utility model when Fig. 9 state.

Embodiment

Referring to Fig. 1 and 2; With one is example mutually; The star that it comprises transition contact line 2, have the corner connection main contact line 1 of first vacuum interrupter 11 and have the 3rd vacuum interrupter 31 connects main contact line 3, has transition resistance 22 to connect with second vacuum interrupter 21 on the transition contact line.

At the product of the utility model, first to the

3rd vacuum interrupter

11,21,31 is by on the bucket wall that is fixed on insulation bucket 4 clockwise successively; Insulating rod 51-53 of the switch terminals band of each vacuum interrupter.

Said drive unit is, cam 6 is fixed in the rotating shaft 7 of switch, and rotating shaft is positioned at the center of circle of insulation bucket; The edge of cam is annular, and the outer end of each insulating rod is enclosed within on the annular of cam, when the cam protuberance faces toward insulating rod; The insulating rod withdrawal, this moment, vacuum interrupter was closed; When the cam recess faced toward insulating rod, insulating rod was drawn out, and this moment, vacuum interrupter broke off.The width of cam protuberance exceeds can push up adjacent two insulating rods simultaneously.

When the central authorities of cam protuberance withstand on first vacuum interrupter and insulating rod thereof (following omission narration insulating rod); First vacuum interrupter is closed; Other two vacuum interrupters are drawn back by the recess of cam and are off-state, and this moment is for the corner connection state, referring to Fig. 1 and 2.

When rotating shaft and cam turn clockwise, when the protuberance of cam withstood on first and second vacuum interrupters simultaneously, first and second vacuum interrupters were closed, and the 3rd vacuum interrupter breaks off.Referring to Fig. 3 and 4.

When rotating shaft and cam continue to turn clockwise, when the central authorities of the protuberance of cam withstood on second vacuum interrupter, second vacuum interrupter was closed, the disconnection of the first and the 3rd vacuum interrupter.Referring to Fig. 5 and 6.

When rotating shaft and the rotation of cam up time continuation pin, when the protuberance of cam withstood on the second and the 3rd vacuum interrupter simultaneously, the 3rd and second vacuum interrupter was closed, and first vacuum interrupter breaks off.Referring to Fig. 7 and 8.

When rotating shaft and cam continue rotation clockwise, when the central authorities of cam protuberance withstood on the 3rd vacuum interrupter, first and second vacuum interrupters broke off, and the 3rd vacuum interrupter is closed.Referring to Fig. 9 and 10.Connect state for star this moment.

Step was opposite when the star angle connect.

Claims

1. the loaded capacity-regulated switch of a single break, it comprises main contact line and transition contact line, it is characterized in that: have transition resistance to connect with second vacuum interrupter on the said transition contact line; Said main contact line has two, and one is the corner connection main contact line that has first vacuum interrupter, and one is the star main contact line that has the 3rd vacuum interrupter; It drives the drive unit of all vacuum interrupter Push And Releases in addition.

2. according to the loaded capacity-regulated switch of the described single break of claim 1, it is characterized in that: first to the 3rd vacuum interrupter is by on the bucket wall that is fixed on the insulation bucket clockwise successively; Insulating rod of the switch terminals band of each vacuum interrupter; The drive unit of said all vacuum interrupters of driving is; Cam is fixed in the rotating shaft of switch; Rotating shaft is positioned at the center of circle of insulation bucket; The edge of cam is annular, and the outer end of each insulating rod is enclosed within on the annular of cam, and the width of cam protuberance exceeds can push up adjacent two insulating rods simultaneously.