KR101768593B1 - Main Circuit Aeembly of Vacuum Circuit Breaker - Google Patents

Main Circuit Aeembly of Vacuum Circuit Breaker Download PDF

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Publication number
KR101768593B1
KR101768593B1 KR1020160007694A KR20160007694A KR101768593B1 KR 101768593 B1 KR101768593 B1 KR 101768593B1 KR 1020160007694 A KR1020160007694 A KR 1020160007694A KR 20160007694 A KR20160007694 A KR 20160007694A KR 101768593 B1 KR101768593 B1 KR 101768593B1
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KR
South Korea
Prior art keywords
terminal
main circuit
circuit breaker
cylindrical
bar
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Application number
KR1020160007694A
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Korean (ko)
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KR20170087743A (en
Inventor
서민규
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엘에스산전 주식회사
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Priority to KR1020160007694A priority Critical patent/KR101768593B1/en
Publication of KR20170087743A publication Critical patent/KR20170087743A/en
Application granted granted Critical
Publication of KR101768593B1 publication Critical patent/KR101768593B1/en

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    • 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
    • H01H1/00—Contacts
    • H01H1/58—Electric connections to or between contacts; Terminals
    • H01H1/5822—Flexible connections between movable contact and terminal
    • 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
    • H02B11/02—Details
    • H02B11/04—Isolating-contacts, e.g. mountings or shieldings

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Trip Switchboards (AREA)

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a main circuit portion of a vacuum circuit breaker, and more particularly, to a main circuit portion of a vacuum circuit breaker capable of adjusting an inter-pole distance and a pull-in distance.
The main circuit part of the vacuum circuit breaker according to an embodiment of the present invention is a main circuit part of a vacuum circuit breaker including a terminal connected to a power source side (load side) or a load side (power source side) ; A connection conductor coupled to a front surface of the bar type terminal and having an insertion portion formed at a lower portion thereof; And a cylindrical terminal coupled to the insertion portion.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vacuum circuit breaker,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a main circuit portion of a vacuum circuit breaker, and more particularly, to a main circuit portion of a vacuum circuit breaker capable of adjusting an inter-pole distance and a pull-in distance.

Generally, the vacuum circuit breaker is a vacuum interrupter (Vacuum Interrupter: VI) inside the circuit breaker by means of an external relay in case of abnormal current such as overcurrent, short circuit and ground fault of extra high voltage / high voltage power distribution line. It protects the load device.

1 to 3 show a vacuum breaker body according to the prior art. FIG. 1 is a perspective view of a vacuum circuit breaker body according to the related art, FIG. 2 is a perspective view of a main circuit part, and FIG. 3 is a perspective view of a main circuit part terminal.

The vacuum circuit breaker main body according to the related art includes a mechanical part 1 provided with an operating mechanism, a transfer part 2 capable of moving the vacuum circuit breaker main body in a cradle (not shown), a power source, And a main circuit unit 3.

The main circuit unit 3 is provided with an upper terminal 4 connected to a power source (load), a lower terminal 5 connected to a load (power source), and a lower terminal 5 provided between the upper terminal 4 and the lower terminal 5, And a vacuum interrupter 6 for performing energization and interruption. At this time, a distance between the upper terminal 4 and the lower terminal 5 is referred to as an inter-pole distance D (see FIG. 2). The distance from the enclosure of the main circuit part 3 to the terminal end of the upper terminal 4 or the lower terminal 5 (the length at which the terminals 4 and 5 are exposed in the main circuit part 3) ).

3, the upper terminal 4, which is one of the main circuit unit terminals, includes a bar terminal 4a and a cylindrical terminal 4b, The cylindrical terminal 4b is exposed to the outside of the main circuit part 3 and connected to a power source (load) or a cradle terminal (not shown). Here, a tulip contactor 4c may be provided on the outer circumferential surface of the cylindrical terminal 4b.

In the device industry, we will replace obsolete power products to maintain and improve power equipment. However, in such a replacement operation, there is a tendency to replace the circuit breaker only to replace the old line, thereby reducing the maintenance cost due to the replacement of the product. In order to replace only the vacuum circuit breaker, products of the same standard as the old model should be used. However, in the case of the old model, most models are discontinued. However, due to the changes in product specifications, the new models often differ in the distance between the gaps and the drawing distance, unlike the spherical model. Due to these differences, there is a difficulty in replacing the aged product by replacing only the breaker. That is, there is a problem that the distance between the gaps and the lead-in distance must be newly designed to match the spherical model and the product must be manufactured.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a main circuit part of a vacuum circuit breaker which is capable of changing a gap distance and a lead-in distance to improve compatibility between products.

The main circuit part of the vacuum circuit breaker according to an embodiment of the present invention is a main circuit part of a vacuum circuit breaker including a terminal connected to a power source side (load side) or a load side (power source side) ; A connection conductor coupled to a front surface of the bar type terminal and having an insertion portion formed at a lower portion thereof; And a cylindrical terminal coupled to the insertion portion.

The terminal may include an upper terminal disposed above the main circuit unit case and a lower terminal disposed below the main circuit unit case.

The connecting portion conductor may include a coupling portion coupled to the bar-shaped terminal, and an inclined portion extending from the coupling portion and having an inclination of a predetermined angle.

Further, the insertion portion is located at a position spaced apart from the main circuit case by a predetermined distance.

The first connection conductor of the upper terminal and the second connection conductor of the lower terminal are not the same in height and length.

The length between the first bar-shaped terminal of the upper terminal and the second bar-shaped terminal of the lower terminal is not the same as the length between the first cylindrical terminal of the upper terminal and the second cylindrical terminal of the lower terminal. do.

The coupling portion may be formed with a screw hole to be screwed into the bar-shaped terminal.

Further, the insertion portion is formed as a groove.

In addition, a plurality of vent holes are formed on the rear surface of the inserting portion, and a cylindrical vent hole communicating with the vent hole is formed in the cylindrical terminal.

The inclined portion is formed such that the lower portion has a narrower width than the upper portion.

According to the main circuit part of the vacuum circuit breaker according to the embodiment of the present invention, since the terminal part can be modified to change the distance between the gaps and the lead-in distance, it is easy to replace the old product and the compatibility between the products can be increased.

Further, the inter-electrode distance and the lead-in distance can be easily changed by replacing only the connecting portion conductor.

As a result, the replacement cost is reduced and compatibility between products is improved.

1 is a perspective view of a vacuum breaker body according to the related art.
2 is a perspective view of the main circuit portion in FIG.
3 is a perspective view of the main circuit unit terminal in Fig.
4 is a perspective view of a vacuum breaker body according to an embodiment of the present invention.
5 is a perspective view of the main circuit portion in FIG.
FIG. 6 is a perspective view showing a state in which the connecting portion conductor and the cylindrical terminal are removed in FIG.
7 is an exploded perspective view of the upper terminal in Fig.
Fig. 8 is a side view of Fig. 5. Fig.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings, which are intended to illustrate the present invention in a manner that allows a person skilled in the art to easily carry out the invention. And does not mean that the technical idea and scope of the invention are limited.

4 is a perspective view of a vacuum breaker body according to an embodiment of the present invention. 5 is a perspective view of the main circuit portion in FIG. FIG. 6 is a perspective view showing a state in which the connecting portion conductor and the cylindrical terminal are removed in FIG. Figure 7 is a perspective view of the connecting conductor and the cylindrical terminal in Figure 5; Fig. 8 is a side view of Fig. 5. Fig. The main circuit unit of the vacuum circuit breaker according to each embodiment of the present invention will be described in detail with reference to the drawings.

The main circuit part of the vacuum circuit breaker according to an embodiment of the present invention is a main circuit part of a vacuum circuit breaker including terminals 20 and 21 connected to a power source side (load side) or a load side (power source side) (25, 25a) provided on the main circuit unit case (14); Connection conductors 30 and 30a coupled to the front surfaces of the bar-shaped terminals 25 and 25a and having insertion portions 36 and 36a formed thereunder; And cylindrical terminals (40, 40a) coupled to the insertion portions (36, 36a).

The terminals 20 and 21 may include an upper terminal 20 disposed on the main circuit unit case 14 and a lower terminal 21 disposed on the lower side of the main circuit unit case 14. A first modifier is attached to the upper terminal 20 and a second modifier is attached to the lower terminal 21 in order to distinguish the components of the upper terminal 20 from the components of the lower terminal 21 . For example, the bar-shaped terminal of the upper terminal 20 is referred to as a first bar-shaped terminal 25, and the bar-shaped terminal of the lower terminal 21 is referred to as a second bar-shaped terminal 25a.

That is, the main circuit unit of the vacuum circuit breaker according to the embodiment of the present invention includes an upper terminal 20 connected to a power source side (load side) and a lower terminal 21 connected to a load side (power source side) corresponding to the upper terminal 20, The upper terminal (20) includes a first bar type terminal (25) installed on the upper side of the main circuit case (14); A first connection conductor 30 coupled to a front surface of the first bar type terminal 25 and having a first insertion portion 36 formed at a lower portion thereof; And a first cylindrical terminal 40 coupled to the first insertion portion 36. The lower terminal 21 includes a second bar type terminal 25a provided below the main circuit case 14, ; A second connecting portion conductor 30a coupled to a front surface of the second bar-shaped terminal 25a and having a second insertion portion 31a formed at a lower portion thereof; And a second cylindrical terminal 40a coupled to the second insertion portion 31a.

Fig. 4 shows the circuit breaker body 10 of the vacuum circuit breaker. The circuit breaker main body 10 mainly includes a mechanism part 11 in which an operation mechanism is installed, a transfer part 12 capable of moving the circuit breaker body 10 in a cradle (not shown), a current- And a main circuit portion 13 for disconnecting the connection.

Although the main circuit portion 13 is often provided in the circuit breaker body 10 in three phases (R phase, S phase, and T phase), three phases are formed and operated in the same manner, do.

4 to 6, an upper terminal 20 and a lower terminal 21 are protruded from the main circuit portion 13. Here, the upper terminal 20 may be connected to the power source side (or the load side), and the lower terminal 21 may be connected to the load side (or the power source side) correspondingly.

The upper terminal 20 and the lower terminal 21 may be provided with radiating fins 15 at the upper portion or the lower portion, respectively. The radiating fins (15) are constructed and installed so as to be able to effectively dissipate heat generated during energization of the main circuit in the terminals (20, 21).

A vacuum interrupter 16 is installed between the upper terminal 20 and the lower terminal 21. [ The vacuum interrupter 16 is provided with a fixed contact (not shown) and a movable contact (not shown). When the movable contact contacts the fixed contact, energization occurs from the power source side to the load side. The current flow is interrupted.

A flexible shunt 17 may be provided between the vacuum interrupter 16 and the lower terminal 21 to provide a supporting force and a clearance.

Below the lower terminal 21, an insulating rod 18 is provided to be connected to a movable contact (not shown) to linearly drive the movable contact.

Each phase of the main circuit portion 13 forms an outer wall and is surrounded by the main circuit portion case 14 so as to maintain insulation. At this time, the main circuit unit case 14 may be formed of a material having excellent insulation properties.

7, the upper terminal 20 may comprise a first bar-shaped terminal 25, a first connecting conductor 30 and a first cylindrical terminal 40. The first bar- The first bar-shaped terminal 25 is formed in a box shape and is coupled to the upper portion of the fixed electrode of the vacuum interrupter 41. A plurality of radiating fins 15 are attached to the top, bottom, and side surfaces of the first bar type terminal 25 in order to release heat generated during energization. The first bar type terminal 25 may have a plurality of first through holes 26 which can be coupled to the vacuum interrupter 16. In addition, a plurality of first fixing grooves 27 for fixing the radiating fins 15 may be formed on the first bar type terminal 25 in a vertical direction. On the other hand, a plurality of second fixing grooves 28, which can be fixed to the main circuit unit case 14, may be formed on the first bar type terminal 25. A screw 29 for fixing the first connection conductor 30 may be provided on the front portion of the first bar type terminal 25. [

The first connection conductor 30 may include a first coupling portion 31 and a first inclined portion 35. A plurality of first screw holes 32 are formed in the first coupling portion 31 so as to be coupled to the first bar type terminal 25. A plurality of first screw grooves 33 are formed on the upper surface of the first engaging part 31 so that the radiating fins 15 can be engaged with each other.

The first inclined portion 35 may be formed to extend at a lower portion of the first engaging portion 31 and have a predetermined angle of inclination. The first inclined portion 35 may be integrally formed with the first engaging portion 31, depending on the embodiment. A first inserting portion 36 is formed at a lower portion of the first inclined portion 35 so that the first cylindrical terminal 40 can be coupled. The first inserting portion 36 may be formed as a groove. A plurality of first ventilation holes 37 may be formed on the rear surface of the first inserting portion 36 to improve heat dissipation.

The first inclined portion 35 may be formed to have a lower width than the upper portion. Accordingly, the shape of the first inclined portion 35 can be smoothly formed, the weight can be reduced, and the supporting force against the first cylindrical terminal 40 can be enhanced.

8, the first inclined portion 35 is formed to have a predetermined angle with respect to the vertical plane. Accordingly, the first insertion portion 36 and the first cylindrical terminal 40 are positioned at a predetermined distance from the main circuit case 14.

The first cylindrical terminal 40 is formed in a cylindrical shape. The first cylindrical terminal 40 is coupled to the first insert 36 of the first connection conductor 30. The first cylindrical terminal 40 may be coupled to the first insert 36 by brazing or the like.

A plurality of first cylindrical ventilation holes 41 are formed in the first cylindrical terminal 40 so as to communicate with the first ventilation holes 37 and allow air to flow therethrough.

A first tulip-type contact 45 may be provided on the outer circumferential surface of the first cylindrical terminal 40. When the upper terminal 20 is connected to the power source side, the current flows from the power source through the first tulip type contact 45, the first cylindrical terminal 40, the first connecting conductor 30 and the first bar terminal 25 And flows to the vacuum interrupter 16.

And the lower terminal 21 is provided on the lower side of the main circuit case 14. The lower terminal 21 may be constituted by a second bar-shaped terminal 25a, a second connecting conductor 30a and a second cylindrical terminal 40a like the upper terminal 20. Here, the second bar-shaped terminal 25a and the second cylindrical terminal 40a may be formed in the same manner as the first bar-shaped terminal 25 and the first cylindrical-shaped terminal 40.

The second connection portion conductor 30a may be formed in a similar manner to the first connection portion conductor 30 and may include a second coupling portion 31a and a second inclination portion 35a. However, the second inclined portion 35a may be formed to be different from the first inclined portion 35 in size. Referring to FIG. 8, the height H2 and the length L2 of the second inclined portion 35a may be different from the height H1 and the length L1 of the first inclined portion 35, respectively. The distance between the first cylindrical terminal 40 and the second cylindrical terminal 40a (the inter-electrode distance in the present invention, D2) is smaller than the distance between the first bar-shaped terminal 25 and the second bar- (Inter-electrode distance D1 in the prior art). That is, the distance between the gaps varies due to the configuration of the first connection conductor 30 and the second connection conductor 30a. That is, it is possible to change the inter-pole distance. Further, the lead-in distance A can be changed by the configuration of the first connection conductor 30 and the second connection conductor 30a. That is, the distance from the main circuit case 14 to the terminal end of the cylindrical terminals 40, 40a depends on the length L1 of the first connection conductor 30 and the length L2 of the second connection conductor 30a can be changed. At this time, the length L1 of the first connection conductor 30 and the length L2 of the second connection conductor 30a may be set to be the same.

According to the main circuit unit of the vacuum circuit breaker according to the embodiment of the present invention, since the terminal portion can be modified to change the gap between the electrodes and the lead-in distance, the aged product can be easily replaced and the compatibility between the products can be increased.

Further, when the connecting portion conductor is replaced, there is an effect that the distance between the electrodes and the lead-in distance can be easily changed.

Accordingly, the replacement cost of the aged power line is reduced and compatibility between the breaker products is improved.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the scope of the present invention but to limit the scope of the technical idea of the present invention. That is, the scope of protection of the present invention should be construed according to the following claims, and all technical ideas which are within the scope of the same should be interpreted as being included in the scope of the present invention.

10 Circuit breaker main body 11 Mechanism part
12 Feeder part 13 Main circuit part
14 main circuit case 15 heat sink pin
16 vacuum interrupter 20 upper terminal
21 Lower Terminal 25 First Bar Terminal
25a Second bar type terminal 26 First through hole
27 first fixing groove 28 second fixing groove
29 Screw 30 1st connection conductor
30a second connection portion conductor 31 first connection portion
31a second coupling portion 32 first screw hole
33 first screw groove 35 first inclined portion
35a second inclined portion 36 first insertion portion
37 first vent hole 40 first cylindrical terminal
40a second cylindrical terminal 41 vacuum interrupter
41 first cylindrical portion ventilation hole 45 tulip-type contactor

Claims (10)

A main circuit part of a vacuum circuit breaker including a terminal connected to a power source side (load side) or a load side (power source side)
The terminal comprises:
A bar type terminal provided in the main circuit case;
A connection conductor coupled to a front surface of the bar type terminal and having an insertion portion formed at a lower portion thereof;
And a cylindrical terminal coupled to the insertion portion,
The terminal comprises an upper terminal provided on the upper side of the main circuit case and a lower terminal provided on the lower side of the main circuit case,
Wherein the first connecting conductor of the upper terminal and the second connecting conductor of the lower terminal are not the same in height and length. delete [2] The vacuum circuit breaker of claim 1, wherein the connection conductor includes a coupling portion coupled to the bar-shaped terminal and an inclined portion extending from the coupling portion and having an inclination of a predetermined angle. The main circuit unit of claim 3, wherein the inserter is located at a predetermined distance from the main circuit case. delete The method of claim 1, wherein the length between the first bar-shaped terminal of the upper terminal and the second bar-shaped terminal of the lower terminal is not equal to the length between the first cylindrical terminal of the upper terminal and the second cylindrical terminal of the lower terminal The main circuit part of the vacuum circuit breaker. [4] The vacuum circuit breaker of claim 3, wherein the coupling portion is formed with a screw hole to be screwed into the bar-shaped terminal. The vacuum circuit breaker of claim 1, wherein the inserting portion is formed as a groove. [2] The vacuum circuit breaker of claim 1, wherein a plurality of vent holes are formed in a rear surface of the insertion portion, and a cylindrical vent hole communicating with the vent hole is formed in the cylindrical terminal. The vacuum circuit breaker of claim 3, wherein the inclined portion is formed to have a lower width than that of the upper portion.


KR1020160007694A 2016-01-21 2016-01-21 Main Circuit Aeembly of Vacuum Circuit Breaker KR101768593B1 (en)

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KR1020160007694A KR101768593B1 (en) 2016-01-21 2016-01-21 Main Circuit Aeembly of Vacuum Circuit Breaker

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Application Number Priority Date Filing Date Title
KR1020160007694A KR101768593B1 (en) 2016-01-21 2016-01-21 Main Circuit Aeembly of Vacuum Circuit Breaker

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KR20170087743A KR20170087743A (en) 2017-07-31
KR101768593B1 true KR101768593B1 (en) 2017-08-17

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007059198A (en) * 2005-08-24 2007-03-08 Kawamura Electric Inc Terminal structure of circuit breaker

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007059198A (en) * 2005-08-24 2007-03-08 Kawamura Electric Inc Terminal structure of circuit breaker

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