KR102175332B1 - Busbar connecting apparatus - Google Patents

Abstract

According to an aspect of the present invention, provided is a bus bar coupling device which can prevent a current from being transmitted between a plurality of bus bars. The bus bar coupling device comprises: a circuit breaker blocking a current; a bus bar coupled to the circuit breaker and formed in a plurality; a current blocking member formed between the plurality of bus bars and blocking the current; a coupling hole formed in the plurality of bus bars and the current blocking member; and a fixing body inserted into the coupling hole and fixing the plurality of bus bars. The circuit breaker includes: a housing formed with a switch blocking the current; a slot formed in the housing and having the bus bar coupled thereto; and a coupling screw formed in the slot and fixing the bus bar. The bus bar includes: a main bus bar to which external power is applied; and a live wire bus bar fixed by the main bus bar and the fixing body and coupled to the circuit breaker.

Description

Busbar connecting apparatus

The present invention relates to a busbar fastening device, and more particularly, to a busbar fastening device capable of fastening a plurality of busbars connected to a circuit breaker formed in a distribution board.

In general, a circuit breaker for main wiring and a number of breakers for branch wiring are installed in the low-voltage part or distribution board of the switchgear.

The main wiring breaker and multiple branch wiring breakers are normally connected through busbars. These busbars, that is, the busbar connected to the main wiring breaker and the branch busbar connected to the branch wiring breaker, are connected by a separate binding device. Closely connected.

In the circuit breaker for main wiring, busbars of busbars for each R,S,T,N or R,S,T phase are arranged in a vertical direction with respect to the distribution panel or switchboard enclosure, and a number of branch busbars are arranged at regular intervals in the horizontal direction perpendicular to the busbars. It is placed in a maintained state.

These busbars and branch busbars are connected to each other by using rivet coupling, welding or brazing to supply current.

However, when the busbar and the branch busbar are connected to each other by rivets, welding, brazing, etc., the rivet has a problem in that the bonding strength decreases over time, and the result of welding, etc., varies depending on the skill of the operator, resulting in poor reliability.

The present invention was conceived to solve the above problems, and an object of the present invention is to provide a busbar fastening device capable of stacking a plurality of busbars by bending a busbar.

Another object of the present invention is to provide a busbar fastening device in which a fixture is formed in order to fasten a bent live busbar to a stacked busbar busbar.

Another object of the present invention is to provide a busbar fastening device capable of preventing current transfer between a plurality of busbars by inserting a guide body into the fastening hole.

A circuit breaker for blocking current according to an aspect of the present invention for achieving the above object, a bus bar coupled to the circuit breaker and formed in a plurality, and a current formed between the plurality of bus bars and blocking current A blocking member, a fastening hole formed in the plurality of busbars and the current blocking material, and a fixture inserted into the fastening hole and fixing a plurality of busbars, and the circuit breaker includes a housing in which a switch for blocking current is formed, A slot formed in the housing, a slot to which the bus bar is coupled, and a fastening screw formed in the slot to fix the bus bar, and the bus bar includes a bus bus bar to which external power is applied, the bus bus bar and the high It is fixed by the congestion and may include a live line bus bar coupled to the breaker.

A gap maintaining device for maintaining a gap between the plurality of stacked live bus bars, and a through hole formed in the gap maintaining device and passing through the live bus bar may be provided.

The live line busbar includes a coupling portion coupled to the circuit breaker, a first bent portion bent and extended from an end of the coupling portion, a second bent portion bent and extended from an end of the first bent portion, and the second bent It may be provided with a fastening portion extending horizontally from the end of the portion, the fastening hole is formed.

The current blocking material may include a plurality of friction protrusions for increasing the frictional force at a position in contact with the busbar, and may be formed of a synthetic resin or a rubber material to block the current.

The fixture may include a guide body that is inserted into the fastening hole and blocks current, and a fixing hardware that is inserted into the guide body and fixes the plurality of bus bars and the current blocking member.

The guide body is inserted into the fastening hole, a guide portion in which an insertion hole into which the fixing hardware is inserted is formed, a separation preventing portion formed at an end of the guide portion and preventing separation of the guide portion from the fastening hole, It is formed so as to surround the inside and the outside of the guide portion, and includes an insertion portion helically coupled to the fastening hole, the insertion portion may be formed of a rubber material that blocks current.

The fixing hardware is inserted into the insertion hole, a blocking portion formed of the same material as the insertion portion, and a fixing portion formed of a metal material to fix the busbar and the current blocking member, and formed in the blocking portion. Can be equipped.

The guide body is inserted at one end of the fastening hole, an insert having one end wider than the fastening hole, and a coupling body inserted from the other end of the fastening hole and coupled to the outside of the insert by force fitting. Can be equipped.

The insert includes a body having a receiving groove in which the fixing hardware is accommodated on an inner circumferential surface, and a guide groove that is cut in the longitudinal direction of the body and guides the diameter of the body to be widened as the fixing hardware is inserted, and the It is formed on the outer circumferential surface of the body, and includes a locking protrusion that prevents separation of the assembly, and as the diameter of the body is widened, friction between the assembly and the busbar and the current blocking member can be improved.

In the guide body, the insert is formed of synthetic resin, the assembly is formed of a rubber material, and the fixing hardware inserted into the insert is formed of a metal material, so that the current can be blocked by the combination of dissimilar materials. .

It is possible to bend the live line bus bar connected to the circuit breaker according to the present invention according to the length.

In addition, a fixture is inserted in a position where the bus bus bar and the live bus bar are in contact, so that a plurality of bus bars can be fixed.

In addition, a guide body, which is a foreign material, is formed to block current and prevent separation of the fixed hardware.

1 to 2 are perspective views showing a busbar fastening device installed in a circuit breaker according to an embodiment of the present invention.
Figure 3 is an exploded perspective view showing the busbar fastening device shown in Figure 2;
4 is a perspective view showing a bus bar according to an embodiment of the present invention.
5 is a cross-sectional view showing a bus bar according to an embodiment of the present invention.
6 is a cross-sectional view showing a busbar in which a fixture according to another embodiment of the present invention is installed.
7 to 8 are cross-sectional views showing a fixture according to another embodiment of the present invention.
9 to 10 are cross-sectional views showing a guide body according to another embodiment of the present invention.
11 is a flow chart showing a state in which the guide body shown in FIG. 10 is coupled.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, it goes without saying that the present invention is not limited to these embodiments and may be modified in various forms.

In the drawings, in order to clearly and briefly describe the present invention, the illustration of parts not related to the description is omitted, and the same reference numerals are used for identical or extremely similar parts throughout the specification. In addition, in the drawings, the thickness and width are enlarged or reduced in order to clarify the description. However, the thickness and width of the present invention are not limited to those shown in the drawings.

In addition, when a certain part "includes" another part throughout the specification, the other part is not excluded, and other parts may be further included unless specifically stated to the contrary.

Hereinafter, a busbar fastening device will be described in detail with reference to the accompanying drawings.

1 to 2 are perspective views showing a busbar fastening device installed in a circuit breaker according to an embodiment of the present invention.

1 to 2, the device for fastening the bus bar 200 according to an embodiment of the present invention includes a circuit breaker 100 for blocking current, and a booth coupled to the circuit breaker 100 and formed in plural. A current blocking material 300 formed between the bar 200 and the plurality of bus bars 200 to block current, and a fastening hole formed in the plurality of bus bars 200 and the current blocking material 300 It includes 400 and a fixture 500 that is inserted into the fastening hole 400 and fixes a plurality of busbars 200.

The bus bar 200 fastening device of the present invention is a method of stacking the four-pole live bus bars 220 arranged in a flat structure in layers and connecting branch circuits using the bus bars 200 on the left and right sides. Due to the characteristics of the stacked structure, there is an advantage of reducing the width of the enclosure when the distribution board is manufactured, but in order not to increase the depth, a limit value of the interlayer spacing of the busbar 200 exists. In order to solve this problem, the bus bar 200 is formed by bending into various shapes, and the bent bus bar 200 is coupled to the live line bus bar 220 to be stacked, respectively. At this time, since the bus bars 200 are formed so as not to contact each other, current does not flow with each other.

The circuit breaker 100 includes a main circuit breaker 100 and a plurality of branch circuit breakers 100 installed in the distribution board, and the main circuit breaker 100 and the branch circuit breaker 100 are connected to each other by a bus bar 200. In addition, the circuit breaker 100 has a housing 110 in which a switch 111 for blocking current is formed, and a plurality of slots 120 to which the bus bar 200 is coupled are formed in the housing 110. The slot 120 is disposed horizontally, and as it is formed into a predetermined screw groove, each busbar 200 is fastened to the slot 120 by a fastening screw.

3 to 4, the bus bar 200 (BUS BAR) is a conductor that transmits power and extends in the longitudinal direction, but the top and bottom surfaces are flatly formed to form a square plate as a whole. In addition, the bus bar 200 is formed of copper as a material, and may be formed in various standards according to the electric capacity to be transferred. Such a bus bar 200 is divided into a bus bus bar 210 and a live bus bar 220, and the live bus bar 220 is connected to the circuit breaker 100 and bent to be fastened to the bus bus bar 210. The live line bus bar 220 includes a coupling portion 221 coupled to the circuit breaker 100, a first bent portion 222 bent and extended from an end of the coupling portion 221, and the first bent portion ( A second bent portion 223 bent and extended at the end of 222, and a fastening portion 224 extending horizontally from the end of the second bent portion 223 and forming the fastening hole 400 do. In this case, the live bus bar 220 installed in the circuit breaker 100 may be formed in different positions and lengths to be bent so as to be connected to the stacked bus bus bar 210. The coupling part 221 is fastened to the slot 120 of the circuit breaker 100 by a fastening screw, and the first bent part 222 is bent upward at the coupling part 221. In this case, the length of the first bent portion 222 is formed in various ways according to the position of the bus bus bar 210 coupled to the stacked live bus bar 220.

Further, the second bent portion 223 is horizontally bent at an end of the first bent portion 222 and a fastening portion 224 that is bent horizontally so as to form a right angle at the end of the second bent portion 223 is formed. The fastening part 224 is formed to be in contact with the end of the bus bus bar 210, and the fastening part 224 is formed in a square shape so as to be formed in a predetermined shape with the bus bus bar 210. Further, the length of the fastening part 224 is variously formed according to the position of the live bus bar 220, and fastening holes 400 to which the fixture 500 is fixed are formed in the fastening part 224, respectively. In this way, the coupling portion 221, the first bent portion 222, the second bent portion 223, and the fastening portion 224 are integrally formed to prevent damage, and the induction of current can be smoothly performed.

The bus bus bar 210 to which the live bus bar 220 is fastened is formed at an interlayer interval of 15 mm, but may be formed to have a thickness of 7 mm depending on the thickness of the live bus bar 220. In addition, when the capacity of the breaker 100 increases, the thickness of the live bus bar 220 and the bus bus bar 210 increases, so that the gap may be narrowed. The bus bus bar 210 is formed to be stacked on each other, and a fastening hole 400 is formed at a position in contact with the live bus bar 220. At this time, when the bus bus bar 210 is stacked, a gap maintaining device 600 that maintains a gap so as not to contact each other is formed, and the gap maintaining device 600 has a through hole through which the bus bus bar 210 passes. do. The through holes are formed at regular intervals, and the bus bus bar 210 penetrating through the through holes is fixed at an accurate position.

5, a plurality of live bus bar 220 and bus bus bar 210 are fastening holes 400 formed at the same position, respectively, and fastening body 500 is inserted into the fastening hole 400 do. In general, the bus bar 210 and the live bus bar 220 are fastened by rivets, welding, and brazing, but this is difficult to apply variously depending on the thickness of the bus bar 200. Specifically, rivets have a problem that the separation between dissimilar metals occurs when the temperature rises and falls, so that the bonding force decreases significantly over time, and the brazing is less reliable because the work result varies depending on the skill of the worker. In addition, both methods have a disadvantage that the bonding strength is lower than when using a bolt-nut, and it is impossible to separate after bonding, so that if replacement or repair of some busbars is required, the whole must be changed.

Thus, the fixture 500 is inserted into the fastening hole 400 in order to couple a plurality of layers with a single bolt, and after the bus bus bar 210 and the live bus are combined, each booth is not in contact with each other. A current blocking material 300 is formed between the bars 200.

The current blocking material 300 is made of a synthetic resin and a rubber material, and prevents the busbar 200 from being damaged when the plurality of busbars 200 are fixed by the fixture 500. The current blocking material 300 is formed in a square shape in the same shape as the shape in which the live bus bar 220 and the bus bus bar 210 are in contact, and a fastening hole 400 is formed in the center so that the fixture 500 is a bus bar. Together with the 200, it is inserted through the current blocking member 300. In addition, the current blocking material 300 is formed with a friction protrusion 310 for increasing the friction force to prevent movement when in contact with the metal bus bar 200. The friction protrusions 310 are formed to protrude upward and downward, respectively, and a plurality of pores are formed in a position in contact with the bus bar 200 to increase bonding strength and to effectively prevent corrosion of the bus bar 200.

The fixing body 500 inserted into the fastening hole 400 of the plurality of busbars 200 and the current blocking material 300 is inserted into the guide body 510 to block current and the guide body 510, and a plurality of It includes a fixing hardware 550 for fixing the bus bar 200 and the current blocking material 300 of. The guide body 510 is inserted to be in contact with the fastening hole 400, and may be inserted by being helically coupled to a spiral groove formed on the inner circumferential surface of the fastening hole 400. The guide body 510 is formed of a rubber material and a synthetic resin to prevent the current between the plurality of busbars 200 from being connected by the fixing hardware 550. In addition, the insertion hole 512 is formed so that the inside is penetrated so that the fixing hardware 550 is inserted. At this time, a spiral groove is also formed on the inner circumferential surface of the guide body 510 so that the fixing hardware 550 may be spirally coupled.

The fixing hardware 550 is formed of bolts and nuts to fix the plurality of busbars 200 or is inserted into the guide body 510 by bolts formed of male and female as shown in FIG. 6 for another embodiment. Specifically, the bolt is formed with a male bolt 553 to be inserted into the guide body 510, and a female bolt 554 into which the male bolt 553 is inserted is formed. The arm bolt 554 has a spiral groove formed on the inner and outer circumferential surfaces, respectively, and the guide body 510 is spirally coupled to the outer circumferential surface. In this way, after the guide body 510 is inserted into the fastening hole 400, the arm bolt 554 is spirally coupled to the guide body 510. In addition, the male bolt 553 is spirally coupled to the female bolt 554 to effectively fix the plurality of bus bars 200 and the current blocking member 300.

In the following description of the busbar fastening device according to another embodiment of the present invention, the same reference numerals are used for the same configuration as the busbar fastening device according to the above-described embodiment, and detailed descriptions thereof will be omitted.

7 to 8 are cross-sectional views showing a fixture according to another embodiment of the present invention.

7 to 8, in the fixture 500 according to an embodiment of the present invention, the guide body 510 is inserted into the fastening hole 400, and the fixing hardware 550 is inserted. A guide portion 511 in which the insertion hole 512 is formed, and a separation preventing portion 513 formed at an end of the guide portion 511 and preventing separation of the guide portion 511 from the fastening hole 400 ), and an insertion portion 514 formed to surround the inside and outside of the guide portion 511 and helically coupled to the fastening hole 400.

The guide part 511 is inserted into the fastening hole 400 and is formed of a metal material. The guide part 511 is formed in a cylindrical shape, and a fixing hardware 550 is inserted therein. At this time, at the end of the guide portion 511, a departure preventing portion 513 having a wide diameter is formed to prevent the guide portion 511 from being separated by passing through the fastening hole 400. In addition, a plurality of protrusions and grooves are formed in the guide part 511 to form a separation preventing part 513 coupled to the outside of the guide part. The separation prevention unit 513 is formed with a groove inside the guide unit 511 is inserted, and is formed of a synthetic resin and rubber material that is a different material from the guide unit 511, and current is passed through the plurality of busbars 200. You can prevent them from being connected to each other. The separation prevention part 513 has an insertion hole 512 formed therein to insert the fixing hardware 550, and a spiral groove is formed on the inner circumferential surface of the insertion hole 512 so that the fixing bolts are helically coupled.

And the fixing hardware 550 coupled to the guide body 510 is inserted into the insertion hole 512, a blocking portion 551 formed of the same material as the insertion portion 514, and the blocking portion 551 And a fixing part 552 formed of a metal material to fix the bus bar 200 and the current blocking material 300. The fixing part 552 is formed of a metal material to improve structural performance to prevent the live bus bar 220 and the bus bus bar 210 from being separated from each other, and fix the bus bar 200 and the current blocking material 300 do. In addition, the blocking portion 551 is formed outside the fixing portion 552 and is formed of the same material as the insertion portion 514 to increase frictional force with the insertion portion 514. In addition, the blocking portion 551 is prevented from being separated by a plurality of fasteners formed outside the fixing portion 552. In addition, a helical protrusion is formed on the blocking part 551 and the outer circumferential surface, and is helically coupled to the helical groove of the insertion part 514.

9 to 10 are cross-sectional views showing a guide body according to another embodiment of the present invention, and FIG. 11 is a flow chart showing a state in which the guide body shown in FIG. 10 is coupled.

9 to 11, the guide body 510 according to an embodiment of the present invention is inserted from one end of the fastening hole 400, and has one end wider than the fastening hole 400. It includes a sieve 520 and an assembly 540 inserted from the other end of the fastening hole 400 and coupled to the outside of the insert 520 by force fitting.

The insert 520 and the assembly 540 are formed of different materials from each other, and are fixed to the fastening hole 400 by the fixing hardware 550. The insert 520 has a body 521 having a receiving groove 522 in which the fixing hardware 550 is accommodated on an inner circumferential surface, and is cut in the longitudinal direction of the body 521, and the fixing hardware 550 is An induction groove 523 for guiding the diameter of the body 521 to spread as it is inserted, and a locking protrusion 530 formed on the outer circumferential surface of the body 521 to prevent separation of the assembly 540 do.

The body 521 is formed of plastic, which is a synthetic resin, and is formed in the longitudinal direction of the fastening hole 400. The body 521 may be variously changed in diameter by the plurality of guide grooves 523, and a spiral groove is formed on the inner circumferential surface of the body 521. The body 521 is formed in a cylindrical shape, and the diameter of the fixing hardware 550 is changed by the fixing hardware 550 when the fixing hardware 550 is accommodated in the body 521 as one end is formed in an oblique line. Specifically, the body 521 is formed by bending each other inward by the guide groove 523 formed in the body 521, and accordingly, the diameter of the body 521 is narrowed. In addition, when the fixing hardware 550 made of a metal material is inserted into the body 521, the diameter of the body 521 is widened by the guide groove 523. In addition, the upper portion of the body 521 is formed in an oblique line so that when the fixing hardware 550 is helically coupled, the body 521 does not bend inward but opens outward.

Accordingly, the diameter of the body 521 is widened by the fixing hardware 550 to the coupling body 540 formed of a rubber material, and as pressure is applied, the coupling body 540 and the insert 520 are inserted in the fastening hole 400. You can prevent it from being deviated.

And the body 521 has a plurality of locking protrusions 530 formed on the outer circumferential surface, and the locking protrusion 530 is bent in the opposite direction into which the assembly 540 is inserted to prevent the inserted assembly 540 from being separated from the outside. do. The assembly 540 is formed of the same rubber material as the current blocking material 300, and is inserted into the fastening hole 400.

In addition, as the body 521 is formed so that both ends are open, the ends of the fixing hardware 550 are formed to pass through, so that the body 521 may be fixed by a nut.

As the assembly 540 formed of a rubber material, the insert 520 formed of a synthetic resin, and the fixed hardware 550 formed of a metal material are combined with each other, current can be effectively blocked by friction between dissimilar materials.

In this guide body 510, the insert 520 is inserted into the fastening hole 400, and after the insert 520 is inserted, the fastening hole 400 so that the coupling body 540 is inserted outside the insert 520. ) The assembly 540 is inserted. And as the fixing hardware 550 is inserted into the insert 520, as the diameter of the body 521 of the insert 520 increases, the guide body 510 can be fixed by applying pressure to the assembly 540. have.

In the above, a busbar fastening device according to an embodiment of the present invention has been described, but the spirit of the present invention is not limited to the embodiment presented herein. And, those skilled in the art who understand the spirit of the present invention will be able to easily propose other embodiments by adding, changing, deleting, or adding components within the scope of the same idea, but this is also within the scope of the present invention. I would say it costs.

100: circuit breaker 110: housing
111: switch 120: slot
200: bus bar 210: bus bar
220: live bus bar 221: coupling portion
222: first bend 223: second bend
224: fastening part 300: current blocking material
310: friction protrusion 400: fastening hole
500: fixture 510: guide body
511: guide part 512: insertion hole
513: departure prevention part 514: insertion part
520: insert 521: body
522: receiving groove 523: guide groove
530: stopping protrusion 540: combination
550: fixed hardware 551: blocking portion
552: fixing part 553: male bolt
554: arm bolt 600: gap holding device

Claims (10)

A circuit breaker that cuts off current,
A busbar coupled to the circuit breaker and formed in plural,
A current blocking material formed between the plurality of busbars and blocking current,
Fastening holes formed in the plurality of bus bars and the current blocking material,
It is inserted into the fastening hole and has a fixture for fixing a plurality of busbars,
The circuit breaker includes a housing in which a switch for blocking current is formed,
A slot formed in the housing and to which the busbar is coupled,
It is formed in the slot and has a fastening screw for fixing the busbar,
The bus bar is a bus bar to which external power is applied,
It is fixed by the bus bus bar and the fixture, and includes a live bus bar coupled to the circuit breaker,
The fixture is inserted into the fastening hole, and a guide body that blocks current,
It is inserted into the guide body and includes a fixing hardware for fixing the plurality of bus bars and the current blocking member,
The guide body is inserted at one end of the fastening hole, and an insert having one end wider than the fastening hole,
It is inserted from the other end of the fastening hole, and includes a coupling body that is forcibly fitted to the outside of the insert,
The insert includes a body having a receiving groove in which the fixing hardware is accommodated on an inner circumferential surface,
A guide groove which is cut in the longitudinal direction of the body and guides the diameter of the body to be widened as the fixing hardware is inserted,
It is formed on the outer circumferential surface of the body, and has a locking protrusion preventing the separation of the assembly,
As the diameter of the body is widened, friction between the combination body and the busbar and the current blocking material is improved,
In the guide body, the insert is formed of a synthetic resin, the assembly is formed of a rubber material, and the fixing hardware inserted into the insert is formed of a metal material. Busbar fastening device characterized by.
The method of claim 1,
A gap maintaining device that maintains a gap between the live bus bars stacked in plurality;
A busbar fastening device formed in the space maintaining device and having a through hole through which the live busbar passes.
The method of claim 1,
The live line bus bar has a coupling portion coupled to the circuit breaker,
A first bent portion bent and extended at an end of the coupling portion;
A second bent portion bent and extended at an end of the first bent portion,
A busbar fastening device, comprising: a fastening part extending horizontally from an end of the second bent part and forming the fastening hole.
The method of claim 3,
The current blocking member has a plurality of friction protrusions for increasing the friction force at a position in contact with the bus bar,
Busbar fastening device, characterized in that formed of a selected one of synthetic resin and rubber material to block the current.
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