KR20170002691U - Vacuum circuit breaker - Google Patents

Vacuum circuit breaker Download PDF

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Publication number
KR20170002691U
KR20170002691U KR2020160000308U KR20160000308U KR20170002691U KR 20170002691 U KR20170002691 U KR 20170002691U KR 2020160000308 U KR2020160000308 U KR 2020160000308U KR 20160000308 U KR20160000308 U KR 20160000308U KR 20170002691 U KR20170002691 U KR 20170002691U
Authority
KR
South Korea
Prior art keywords
spring
contact
circuit breaker
bus
contact pressure
Prior art date
Application number
KR2020160000308U
Other languages
Korean (ko)
Inventor
장민호
Original Assignee
엘에스산전 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 엘에스산전 주식회사 filed Critical 엘에스산전 주식회사
Priority to KR2020160000308U priority Critical patent/KR20170002691U/en
Publication of KR20170002691U publication Critical patent/KR20170002691U/en

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
    • H01H33/66—Vacuum switches
    • H01H33/6606—Terminal arrangements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
    • H01H33/66—Vacuum switches
    • H01H33/662—Housings or protective screens
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B11/00—Switchgear having carriage withdrawable for isolation
    • H02B11/12—Switchgear having carriage withdrawable for isolation with isolation by horizontal withdrawal
    • H02B11/127—Withdrawal mechanism
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
    • H02B13/02—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
    • H02B13/035—Gas-insulated switchgear
    • H02B13/0354—Gas-insulated switchgear comprising a vacuum switch

Abstract

The present invention has an effect that a spring portion is provided to provide a contact pressure to the upper and lower portions of a plurality of contacts, thereby increasing the contact pressure applied to the contactor and the bus terminal, so that it can be used in a large capacity vacuum breaker in addition to a small capacity.

Description

{VACUUM CIRCUIT BREAKER}

The present invention relates to a vacuum circuit breaker, and more particularly, to a vacuum circuit breaker having a bus connection part that can be used not only for a small-capacity circuit breaker but also for a large-capacity circuit breaker by increasing the contact pressure between the bus-line connecting part and the bus-

Generally, a breaker is an electric protective device that protects a load device and a line from a fault current in the event of a short circuit or a ground fault occurring in an electric circuit.

Such circuit breakers are classified into an inflow circuit breaker using oil as a soot medium according to the SOHO medium, a gas circuit breaker using inert gas (SF 6 ) gas, an air circuit breaker using air as a soot medium, And a vacuum circuit breaker using the dielectric strength of vacuum.

Currently, most electric power equipment products use arc heaters and sulfur hexafluoride gas, which are excellent in insulation performance, as insulating medium, but sulfur hexafluoride gas has 23,900 times the greenhouse effect of carbon dioxide and is being used worldwide .

In Korea, environmentally friendly electric power equipment products capable of replacing sulfur hexafluoride gas are being actively developed. Demand for vacuum interrupters is rapidly increasing as one of such environmentally friendly electric power equipment products.

Vacuum circuit breaker mainly plays a role of protection of electric power transportation control and power system. It has a large breaking capacity, high reliability and safety, and can be mounted in a small installation space. Thus, its application range from medium voltage to high voltage is expanded It is going.

At this time, the vacuum circuit breaker is installed together with the switchboard for inserting and managing various electric devices including the breaker for the operation and control of the power station and the substation, and the operation of the electric motor, and is housed in the cradle fixed to the switchboard.

2 is a side view showing a state where the breaker main body is seated on the cradle, and FIG. 3 is a side view showing a state where the breaker main body is seated on the cradle And FIG. 4 is a side view showing a state where the breaker main body is seated on the cradle and moved to the drawn-in position.

1 to 6, a breaker body 10 of a conventional vacuum circuit breaker is provided with a bus connection portion 11 and a bus terminal 31 and a load terminal 33 are provided on the cradle 30 When the breaker main body 10 moves inward from the inside of the cradle 30, the bus terminal 31 is fitted to the bus connection portion 11 so that the breaker main body 10 and the cradle 30 are electrically connected.

At this time, the bus-line connecting portion 11 includes a connecting body 11a, a contact 11b connected to the upper and lower surfaces of the connecting body 11a, and a bus terminal 31 interposed between the contact 11b and the contact 11b A contact spring 11c for providing a contact pressure and a washer 11d located between the contact spring 11c and the contact 11b.

However, in the case of the bus connection part 11 provided in the conventional vacuum circuit breaker, the contact pressure applied to the contactor 11b and the bus terminal 31 through the contact spring 11c is small and used only for the small- There is a problem that it can not be used for a large capacity circuit breaker such as 31.5KA to 40KA.

When a fault current is applied due to a small contact pressure, a space is generated between the contact 11b and the bus terminal 31. Due to this space, an arc is generated between the contact 11b and the bus terminal 31, There is a problem that a portion is broken or a malfunction occurs.

The object of the present invention is to provide a vacuum circuit breaker having a bus connection part that can be used not only for a small-capacity circuit breaker but also for a large-capacity circuit breaker, by increasing the contact pressure between the bus- have.

The main object of the present invention is to provide a vacuum circuit breaker in which a circuit breaker main body is moved inside the cradle and a bus terminal of the cradle is inserted into a bus line connecting portion of the breaker main body to be mutually energized, A connection body to be connected; A plurality of contacts connected to the upper and lower surfaces of the connecting portion main body to receive the bus terminal; And a spring portion which is located at least one of the upper and lower portions of the contactor and provides contact pressure upward or downward when the bus terminal is sandwiched between the contactors. do.

The spring unit may include an outer spring and an inner spring provided inside the outer spring to provide a contact pressure to the contact with the outer spring.

In addition, a bolt portion is provided on the bus connection portion so as to penetrate the spring portion and the contact portion in order, and a nut portion is connected to a lower end of the bolt portion to adjust the contact pressure of the spring portion.

Wherein the bolt portion is composed of a head portion and a body portion extending from the head portion, and the head portion is positioned so that the bolt portion is in close contact with the upper end of the spring portion positioned on the upper portion of the contact portion when the spring portion and the contactor penetrate, Wherein the contact portion is connected to the body portion in a state of being in tight contact with the spring portion located below the contactor and moves the position of the bolt according to the rotation so that the contact pressure of the spring portion is adjusted.

As described above, the vacuum breaker of the present invention has a plurality of spring portions for providing a contact pressure to the upper and lower portions of a plurality of contacts, thereby increasing the contact pressure applied to the contacts and the bus terminals. .

Further, the spring portion is formed of two springs, which has the effect of greatly increasing the contact pressure applied to the contactor and the bus terminal through the spring portion.

In addition, since the spring portion provides the contact pressure when the contact portion is vertically positioned, when the bus terminal is inserted between the contact portions, the contact pressure is uniformly provided, so that the connection between the bus connection portion and the bus terminal can be stably performed.

In addition, since the contact pressure is increased through the spring portion, the vacuum circuit breaker operates stably without malfunction.

Further, the spring portion is compressed or uncompressed according to the rotation of the nut portion, so that the contact pressure applied through the spring portion can be easily adjusted.

1 is a perspective view showing a circuit breaker main body of a conventional vacuum circuit breaker;
2 is a perspective view showing a cradle in which a breaker main body is drawn or drawn in a conventional vacuum circuit breaker;
3 is a side view showing a state where the breaker main body is seated on the cradle in the conventional vacuum circuit breaker.
4 is a side view showing a state in which a breaker main body of the conventional vacuum circuit breaker is moved to the inside of the cradle and a bus terminal is inserted into the bus line connecting portion.
5A is a perspective view showing a bus-line connecting portion provided in the breaker main body in a conventional vacuum circuit breaker;
FIG. 5B is a perspective view showing a state in which one contact is disconnected from a bus connection portion provided in the circuit breaker body of the conventional vacuum circuit breaker. FIG.
6 is a side view showing a state in which a bus terminal is inserted into a bus connection portion provided in a circuit breaker body of a conventional vacuum circuit breaker.
7 is a perspective view showing a bus connection portion provided in the breaker main body of the vacuum circuit breaker according to the present invention;
FIG. 8 is a perspective view showing a state in which a spring portion is disassembled from a bus connection portion provided in a circuit breaker body of a vacuum circuit breaker according to the present invention; FIG.
Fig. 9 is a side view showing a bus connecting portion provided in the circuit breaker body of the vacuum circuit breaker according to the present invention; Fig.
10 is a side view showing a state in which a bus terminal is inserted into a bus line connecting portion provided in the circuit breaker body of the vacuum circuit breaker according to the present invention;

Hereinafter, a vacuum circuit breaker according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 7 is a perspective view showing a bus connection part of a circuit breaker body of a vacuum circuit breaker according to the present invention, FIG. 8 is a perspective view showing a state where a spring part is disassembled from a bus connection part provided in a circuit breaker body of a vacuum circuit breaker according to the present invention, FIG. 9 is a side view showing a bus connection part of the breaker main body of the vacuum circuit breaker according to the present invention, and FIG. 10 is a side view showing a state in which a bus terminal is inserted into a bus connection part of the breaker main body of the vacuum circuit breaker according to the present invention.

7 and 9, in the vacuum breaker according to the present invention, a breaker body (not shown) provided with a bus connection part 100 moves inside a cradle (not shown) (300) are fitted into the bus connection part (100), thereby the mutual energized state.

The bus connection unit 100 includes a connection body 110, a plurality of contacts 130 connected to the upper and lower surfaces of the connection body 110, and a plurality of spring units 150 and 170.

The connection unit main body 110 is connected to the breaker main body 110 and applies a current flowing through the breaker main body 110.

A plurality of contacts 130 are disposed on the upper and lower surfaces of the connection body 110 so that the bus terminal 300 is sandwiched between the contacts 130 so that the current applied through the connection body 110 So that the circuit breaker main body and the cradle are electrically connected to each other.

The spring portion 150 of one of the plurality of spring portions 150 and 170 is positioned on the contactor 130 so that when the bus terminal 300 is sandwiched between the contactors 130, 130 and the bus terminal 300 are in close contact with each other to maintain a contact state.

The other spring part 170 of the plurality of spring parts 150 and 170 is positioned below the contactor 130 so that when the bus terminal 300 is sandwiched between the contactors 130, And the bus terminal 300 are in close contact with each other to maintain a contact state.

Therefore, when the bus terminal 300 is inserted between the contacts 130 because the plurality of spring portions 150 and 170 provide the upward and downward contact pressure in a state where the plurality of spring portions 150 and 170 are vertically positioned on the contactor 130, So that the connection between the bus connecting portion 100 and the bus terminal 300 can be stably performed.

8, the spring unit 150 located on the contactor 130 includes an outer spring 151 and an inner spring 153.

The external spring 151 is positioned above the contactor 130 and provides contact pressure downward when the bus terminal 300 is sandwiched between the contactors 130.

The inner spring 153 is located inside the outer spring 151 and provides a downward contact pressure together with the outer spring 151 when the bus terminal 300 is sandwiched between the contacts 130 .

The spring unit 170 located below the contactor 130 includes an external spring 171 and an internal spring 173 in the same manner as the spring unit 150 disposed on the contactor 130.

The external spring 171 is positioned below the contactor 130 and provides a contact pressure upward when the bus terminal 300 is sandwiched between the contactors 130.

The inner spring 173 is located inside the outer spring 171 and when the bus terminal 300 is inserted between the contacts 130, the inner spring 173 provides a contact pressure upward with the outer spring 171 .

10, when the bus terminal 300 is sandwiched between the contacts 130, the bus terminal 300 is provided with the increased contact pressure through the double spring portions 150 and 170.

The conventional bus connection part 11 can not be used for a large-capacity circuit breaker because the contact pressure applied by the contactor 11b and the bus terminal 31 to contact each other is low and the contactor 11b and the busbar An arc is generated between the contact 11b and the bus terminal 31 due to such a space, so that the contact portion is broken or a malfunction occurs.

However, in the present invention, the spring portions 150 and 170 are provided on the upper and lower portions of the contactor 130 to improve the joining force, and the spring portions 150 and 170 have a double spring structure, It can be used not only for large capacity circuit breaker such as 31.5KA ~ 40KA, but also operates normally even if fault current is applied.

The bus connection part 100 may further include a bolt part 190 for passing through the spring part 150 and the contact part 130 in order.

The bolt portion 190 includes a head portion 191 and a body portion 193 extending from the head portion 191.

The head part 191 is connected to the spring part 150 located at the upper part of the contactor 130 when the bolt part 190 passes through the spring parts 150 and 170 and the contactor 130, And the body portion 193 is positioned so as to pass through the respective spring portions 150 and 170 and the contactor 130.

At this time, a nut portion 250 is provided at a lower end of the body portion 193 to adjust the contact pressure of the spring portions 150 and 170.

Accordingly, when the nut portion 250 is rotated and moved in the direction of the head portion 191, the spring portions 150 and 170 are compressed and the contact pressure is increased, and the nut portion 250 is moved in the opposite direction The compression of the spring portions 150 and 170 is gradually released and the contact pressure is reduced, so that the contact pressure is regulated through the nut portion 250. Accordingly, .

In addition, washers 210 and 230 may be further provided between the head portion 191 and the nut portion 250 and between the spring portions 150 and 170. The washer 210, The head portion 191 and the spring portion 150 and the nut portion 250 and the spring portion 170 are prevented from being deformed by friction during rotation of the spring portion 250. [

In the present invention having the above configuration, the plurality of spring portions 150 and 150 are provided on the upper and lower portions of the plurality of contacts 130 to provide a contact pressure to the bus terminal 300 sandwiched between the contactor 130 and the contactor 130, 170 to increase the contact pressure applied thereto, so that the bus connector 100 can be used in a large-capacity vacuum circuit breaker in addition to a small capacity.

Also, the spring portions 150 and 170 are formed of two springs so that the contact pressure applied to the contactor 130 through the spring portions 150 and 170 is greatly improved, thereby stably operating the vacuum circuit breaker without malfunction.

Since the spring portions 150 and 170 are vertically positioned on the contactor 130 to provide the contact pressure, when the bus terminal 300 is inserted between the contacts 130, the contact pressure is uniformly provided, And the bus terminal 300 can be stably connected.

In addition, the spring portions 150 and 170 are compressed or uncompressed according to the rotation of the nut portion 250, so that the contact pressure applied through the spring portions 150 and 170 can be easily adjusted.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not for the purpose of limitation. Therefore, the above description does not limit the scope of the present invention, which is defined by the limitations of the following claims.

10: breaker main body 11, 100: bus connection
11a, 110: connecting body 11b, 130: contact
11c: Contact spring 11d: Washer
30: cradle 31: bus terminal
33: load terminal 150, 170: spring portion
151, 171: outer spring 153, 173: inner spring
190: bolt portion 191: head portion
193: body portion 210, 230: washer
250: nut part 300: bus terminal

Claims (4)

The breaker main body moves inside the cradle and the bus terminal of the cradle is inserted into the bus line connecting portion of the breaker main body,
The bus-
A connecting body connected to the breaker main body;
A plurality of contacts connected to the upper and lower surfaces of the connecting portion main body to receive the bus terminal; And
A spring portion which is located at least one of an upper portion and a lower portion of the contactor and provides contact pressure upward or downward when the bus terminal is sandwiched between the contactors;
And a vacuum circuit breaker. The method according to claim 1,
The spring portion,
And an inner spring provided inside the outer spring to provide a contact pressure to the contact with the outer spring. The method according to claim 1,
Wherein the bolt connecting portion is provided with a bolt portion for passing through the spring portion and the contact portion,
And a nut portion is connected to the lower end of the bolt portion to adjust the contact pressure of the spring portion. The method of claim 3,
Wherein the bolt portion includes a head portion and a body portion extending from the head portion,
Wherein the head portion is positioned so that the bolt portion is in close contact with the upper end of the spring portion located at the upper portion of the contact portion when the spring portion and the contactor pass through,
Wherein the nut portion is connected to the body portion in a state of being in tight contact with the spring portion located at a lower portion of the contactor, and moves the position of the bolt portion according to the rotation so as to adjust the contact pressure of the spring portion.
KR2020160000308U 2016-01-19 2016-01-19 Vacuum circuit breaker KR20170002691U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR2020160000308U KR20170002691U (en) 2016-01-19 2016-01-19 Vacuum circuit breaker

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR2020160000308U KR20170002691U (en) 2016-01-19 2016-01-19 Vacuum circuit breaker

Publications (1)

Publication Number Publication Date
KR20170002691U true KR20170002691U (en) 2017-07-27

Family

ID=59399732

Family Applications (1)

Application Number Title Priority Date Filing Date
KR2020160000308U KR20170002691U (en) 2016-01-19 2016-01-19 Vacuum circuit breaker

Country Status (1)

Country Link
KR (1) KR20170002691U (en)

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