KR101734049B1 - Limit switch and circuit breaker using the same - Google Patents

Limit switch and circuit breaker using the same Download PDF

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Publication number
KR101734049B1
KR101734049B1 KR1020150062621A KR20150062621A KR101734049B1 KR 101734049 B1 KR101734049 B1 KR 101734049B1 KR 1020150062621 A KR1020150062621 A KR 1020150062621A KR 20150062621 A KR20150062621 A KR 20150062621A KR 101734049 B1 KR101734049 B1 KR 101734049B1
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KR
South Korea
Prior art keywords
electrode
fixed electrode
lever
fixed
contact
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Application number
KR1020150062621A
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Korean (ko)
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KR20160130903A (en
Inventor
조민진
Original Assignee
현대일렉트릭앤에너지시스템(주)
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Priority to KR1020150062621A priority Critical patent/KR101734049B1/en
Priority to CN201610250341.3A priority patent/CN106067395B/en
Publication of KR20160130903A publication Critical patent/KR20160130903A/en
Application granted granted Critical
Publication of KR101734049B1 publication Critical patent/KR101734049B1/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H31/00—Air-break switches for high tension without arc-extinguishing or arc-preventing means
    • H01H31/26—Air-break switches for high tension without arc-extinguishing or arc-preventing means with movable contact that remains electrically connected to one line in open position of switch
    • H01H31/28—Air-break switches for high tension without arc-extinguishing or arc-preventing means with movable contact that remains electrically connected to one line in open position of switch with angularly-movable contact
    • 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
    • H01H33/02—Details
    • H01H33/28—Power arrangements internal to the switch for operating the driving mechanism
    • 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
    • H01H33/02—Details
    • H01H33/42—Driving mechanisms

Abstract

The limit switch according to the present invention can stably maintain the contact pressure by using a plurality of springs, and the circuit breaker using the limit switch can stably grasp the state of whether the circuit is open or closed.

Figure R1020150062621

Description

LIMIT SWITCH AND CIRCUIT BREAKER USING THE SAME < RTI ID = 0.0 >

The present invention relates to a limit switch and a circuit breaker using the same.

Generally, circuit breaker is an industrial power device that automatically cuts off the line when a fault current such as an overcurrent or a short-circuit current is generated in a transmission line having a relatively low voltage and extinguishes an arc generated when the line is broken by using compressed air.

The circuit breaker largely performs a closing operation for closing the energizing circuit and a closing operation for opening the energizing circuit. The charging and discharging operations of the circuit breaker are generally performed automatically or according to the user's selection according to the state of the energizing circuit.

The circuit breaker is equipped with a plurality of limit switches in order to output a signal for inputting and interrupting to the display unit, the control unit, and the like when the input and the cutoff are made. The conventional limit switch uses a rotary lever, but it is difficult to maintain a stable contact pressure.

Korean Patent Registration No. 0972935

A limit switch capable of maintaining a stable contact pressure and a circuit breaker using the same are provided.

A limit switch according to an embodiment of the present invention includes a base including a guide portion; A lever connected to the guide portion and axially movable; A fixed electrode connected to the base; A movable electrode connected to the lever and detachable from the fixed electrode according to movement of the lever; And a contact pressure providing unit connected to the lever and providing pressure to allow the fixed electrode and the moving electrode to contact with each other.

The fixed electrode may include: a pair of first fixed electrodes connected to the base; And a pair of second fixed electrodes connected to the base and spaced apart from the first fixed electrode so as to face the first fixed electrode, the moving electrode being positioned between the first fixed electrode and the second fixed electrode, As the lever moves, it can contact one of the first fixed electrode and the second fixed electrode.

Further, the lever includes a lever body; And an elastic member provided in contact with the lever body and the base to provide an elastic force to the lever body in accordance with the position of the lever with respect to the base.

Further, the contact pressure providing portion may include: a first contact pressure providing member connecting the lever and the base; And a second contact pressure providing member connecting the lever and the moving electrode, wherein a pressure provided by the first contact pressure providing member and a pressure provided by the second contact pressure providing member are opposite to each other .

In addition, the first pressure providing member and the second pressure providing member may be composed of compression springs.

The first contact pressure providing member may provide a pressure to the moving electrode toward the first fixed electrode when the moving electrode and the first fixed electrode are in contact with each other, When the electrode and the second fixed electrode are in contact with each other, pressure can be applied to the movable electrode toward the second fixed electrode.

According to another aspect of the present invention, there is provided a circuit breaker comprising: a connection member driving unit connected to a connection member and having a rotation axis portion rotated in conjunction with closing and closing of an electrode bar of a connection member; A switch unit fixed to the cradle body so as to be spaced apart from the connection member driving unit, the switch unit comprising a plurality of the limit switches; And a switch operation unit which is driven in conjunction with the rotary shaft unit to temporarily operate or stop the plurality of switches when the electrode bar of the connection member is closed or closed.

The switch operating unit may include a rotary member fixed to the rotary shaft and rotated in conjunction with the rotary shaft, And a switch operating member that is rotated by the rotating member to rotate or stop the plurality of limit switches when the rotating member rotates.

It has a structure including a plurality of springs and has an effect that the contact pressure can be stably maintained.

1 is a front sectional view showing a limit switch according to an embodiment of the present invention.
2 is an exploded view of a limit switch according to an embodiment of the present invention.
3 is a diagram illustrating a state in which no pressure is externally applied to the limit switch according to an embodiment of the present invention.
4 is a view showing a state where a pressure is externally applied to a limit switch according to an embodiment of the present invention.
5 is a perspective view of a circuit breaker in accordance with an embodiment of the present invention.
FIG. 6 is a view showing a rotation axis portion, a limit switch, and a switch operation unit of a circuit breaker according to an embodiment of the present invention.
7 is an explanatory view for explaining the operation of a circuit breaker according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. However, the embodiments of the present invention can be modified into various other forms, and the scope of the present invention is not limited to the embodiments described below. Further, the embodiments of the present invention are provided to more fully explain the present invention to those skilled in the art. The shape and size of elements in the drawings may be exaggerated for clarity.

FIG. 1 is a front sectional view showing a limit switch according to an embodiment of the present invention, and FIG. 2 is an exploded view of a limit switch according to an embodiment of the present invention. FIG. 3 is a view showing a state in which no external pressure is applied to the limit switch according to an embodiment of the present invention, and FIG. 4 is a view showing a state where a pressure is externally applied to the limit switch according to an embodiment of the present invention. FIG. FIG. 5 is a perspective view of a circuit breaker according to an embodiment of the present invention, FIG. 6 is a view showing a rotation axis portion, a limit switch, and a switch operation unit of a circuit breaker according to an embodiment of the present invention, Fig. 3 is an explanatory view for explaining the operation of the circuit breaker according to one embodiment of the present invention.

An embodiment of the present invention will be described with reference to Figs. 1 and 2. Fig. 1, a limit switch 51 according to an embodiment of the present invention includes a base 100, a lever 200, a fixed electrode 300, a movable electrode 400, and a contact pressure providing unit 500, . ≪ / RTI > The guide unit 110 may be formed on the base 100 to allow the lever 200 to be connected thereto. The movable electrode 400 may be connected to the lever 200 and the movable electrode 400 may contact or drop from the fixed electrode 300 as the lever 200 moves.

The lever 200 may include a lever body 210 and an elastic support member 220. The elastic support member 220 connects the lever body 210 and the base 100, (Not shown). The movable electrode 400 and the fixed electrode 300 can be in contact with each other as shown in FIG. 1 if there is no pressure exerted on the lever 200 due to the elastic force provided by the lever body 210 have.

The fixed electrode 300 includes a pair of first fixed electrodes 310 connected to the base 100 and a pair of second fixed electrodes 310 spaced apart from each other to face the first fixed electrode 310, The second fixed electrode 320 may be formed on the second fixed electrode 320. The movable electrode 400 may be positioned between the first fixed electrode 310 and the second fixed electrode 320 and may be disposed on the first fixed electrode 310 as the lever 200 moves Or may contact the second fixed electrode 320.

A closed electric circuit may be formed by contacting the movable electrode 400 with the fixed electrode 300. The movable electrode 400 is not fixed to the first fixed electrode 310 and is not fixed to the second fixed electrode 320 so that the movable electrode 400 stably contacts the fixed electrode 300 There is a possibility that the closed circuit formed by contacting the movable electrode 400 with the fixed electrode 300 may become unstable.

Since the fixed electrode 300 may include the first fixed electrode 310 and the second fixed electrode 320, two electric circuits are possible by the movement of the movable electrode 400 . However, since the movable electrode 400 can not contact the first fixed electrode 310 and the second fixed electrode 320 at the same time, the two circuits can not be closed circuits.

It may be necessary to stably maintain the pressure between the moving electrode 400 and the fixed electrode 300 in order to stably maintain the closed loop formed by the movement of the moving electrode 400. The contact pressure providing unit 500 may provide a pressure to the moving electrode 400 so that a pressure that is closely attached between the moving electrode 400 and the fixed electrode 300 can be stably maintained.

Since the fixed electrode 300 may include the first fixed electrode 310 and the second fixed electrode 320, the contact pressure providing unit 500 may include the first contact pressure providing member 510 and the second fixed electrode 320, And a two-piece pressure providing member 520. The first contact pressure providing member 510 may provide pressure to the moving electrode 400 toward the first fixed electrode 310 by connecting the lever 200 and the base 100 . The second contact pressure providing member 520 may connect the lever 200 and the moving electrode 400 to provide a pressure to the moving electrode 400 toward the second fixed electrode 320 have. An electrode guide 330 may be provided between the first fixed electrode 310 and the second fixed electrode 320. The electrode guide 330 may be disposed between the first fixed electrode 310 and the second fixed electrode 320 can be stably moved.

The first pressure providing member 510 may provide pressure to the lever 200 in a direction to push the lever 200 outward as shown in FIG. 1, And may be connected to the lever 200 through the second pressure providing member 520. Accordingly, the first pressure providing member 510 can provide pressure to the moving electrode 400 through the lever 200 and the second pressure providing member 520. [

An embodiment of the present invention will be described with reference to Figs. 3 and 4. Fig. When the lever 200 is not sufficiently pressurized from the outside, the moving electrode 400 may contact the first fixed electrode 310 as shown in FIG. At this time, the first contact pressure providing member 510 may provide pressure in a direction to push the lever 200 out of the base 100, and the second contact pressure providing member And may provide pressure to the moving electrode 400 connected to the lever 200.

The first contact pressure providing member 510 may be composed of a spring having an elastic force to provide a pressure to the moving electrode 400. When the movable electrode 400 contacts the first fixed electrode 310, one closed circuit may be formed. This circuit may be referred to as a first circuit 610. 3, the first circuit 610 forms a closed circuit so that the user can determine whether the lever 200 is under pressure or not, have.

The second contact pressure providing member 510 may be composed of a spring that can have an elastic force to provide a pressure to the moving electrode 400. When the movable electrode 400 contacts the second fixed electrode 320, one closed circuit may be formed, and this circuit may be referred to as a second circuit 620. That is, when pressure is applied to the lever 200 from the outside, the lever 200 moves toward the inside of the base 100 as shown in FIG. 4, and the moving electrode The second circuit 620 forms a closed circuit so that the user can check whether or not the lever 200 is pressurized by the second fixed electrode 320. [ It can be judged.

The movable electrode 400 may be positioned between the first fixed electrode 310 and the second fixed electrode 310 so that the first circuit 610 may be closed or the second circuit 620 may be closed due to the position of the movable electrode 400, It is possible to prevent the first circuit 610 and the second circuit 620 from being closed at the same time because the first and second fixed electrodes 320 and 320 can not be contacted simultaneously. If the first circuit 610 and the second circuit 620 are closed at the same time, it is difficult for the user to determine whether or not the lever 200 is supplied with an external pressure.

An embodiment of the present invention will be described with reference to Figs. 5 to 7. Fig. The circuit breaker 1 according to an embodiment of the present invention may include a connection member driving portion 30, a switch portion 50, and a switch operation unit 40. [

The connection member driving unit 30, the switch unit 50 and the switch operation unit 40 are installed in the cradle main body 110 and are disposed in an inner space of an enclosure (not shown) of the circuit breaker 1 .

The connection member driving unit 30 may include a rotation axis portion 31 connected to a connection member (not shown) and rotated in conjunction with insertion and disconnection of the connection member to an electrode bar (not shown). That is, the connection member driving unit 30 may include a structure having a power transmission structure, and may transmit a driving force for closing the connection member from the electrode bar when the connection member is inserted into the electrode bar or an accident current is generated.

The switch unit 50 may be fixed to the cradle body 10 so as to be spaced apart from the connection member driving unit 30 and may include a plurality of the limit switches 51. That is, the switch unit 50 may be installed in the switch mounting member 20 of the cradle body 10, and the plurality of limit switches 51 may be installed side by side in a row. Meanwhile, the lever 200 (see FIG. 1) of the limit switch 51 may be disposed toward the inside of the cradle body 110.

The switch operation unit 40 is driven in conjunction with the rotary shaft 31 so that the plurality of limit switches 51 can be actuated or stopped at a time when the electrode bar of the connection member is closed or closed. To this end, the switch operation unit 40 may include a rotary member 41 and a switch operation member 42. [

The rotary member 41 is fixed to the rotary shaft portion 31 and can rotate in conjunction with the rotary shaft portion 31. That is, the switch operating member 42 can be rotated in accordance with the rotation of the rotary shaft portion 31.

The switch operating member 42 may be installed on a mounting base 60 provided on the cradle body 110.

When the rotary shaft portion 122 is rotated so that the contact member is moved from the closed state to the closed state, the switch operating portion 144c is operated by the restoring force applied to the button 132a from the inside to the outside of the switch 132, ). ≪ / RTI >

The switch actuating member 42 is disposed apart from the limit switch 51 of the switch unit 50 when the rotary shaft 31 is positioned in the cutoff state of the contact member. Thereafter, when the rotary shaft portion 31 is rotated to insert the contact member, the rotary member 41 may be rotated in conjunction with the rotary shaft portion 31. When the rotary member 41 rotates, the rotary member 41 may apply pressure to the limit switch 51 while rotating the switch actuating member 42.

The switch actuating member 42 is capable of operating or stopping the plurality of limit switches 51 of the switch unit 50 at a time according to the rotation of the rotary shaft 31 rotated in conjunction with the contact member have.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It will be obvious to those of ordinary skill in the art.

1: circuit breaker 10: cradle body
20: switch mounting member 30:
31: rotating shaft part 40: switch operating unit
41: rotating member 42: switch operating member 42:
50: Switch part 51: Limit switch
60: mounting base 100: base
110: guide portion 200: lever
210: lever body 220:
300: fixed electrode 310: first fixed electrode
320: second fixed electrode 330: electrode guide
400: moving electrode 500: contact pressure supply
510: first contact pressure providing member 520: second contact pressure providing member
610: first circuit 620: second circuit

Claims (8)

A base including a guide portion;
A lever body connected to the guide portion and capable of moving in an axial direction and an elastic force providing portion for providing an elastic force to the lever body in accordance with a position of the lever body in contact with the base in contact with the lever body;
A fixed electrode having a pair of first fixed electrodes connected to the base and a pair of second fixed electrodes spaced apart from each other so as to face the first fixed electrode;
A movable electrode connected to the lever and detachable from the fixed electrode according to movement of the lever; And
And a contact pressure providing unit having a first contact pressure providing member for connecting the lever and the base, and a second contact pressure providing member for connecting the lever and the moving electrode,
Wherein the first pressure providing member and the second pressure providing member are constituted by compression springs,
Wherein the movable electrode is positioned between the first fixed electrode and the second fixed electrode and contacts one of the first fixed electrode and the second fixed electrode as the lever moves,
Wherein the pressure provided by the first pressure providing member and the pressure provided by the second pressure providing member are opposite in direction,
Wherein the first contact pressure providing member provides pressure to the moving electrode toward the first fixed electrode when the moving electrode and the first fixed electrode are in contact with each other,
Wherein the second contact pressure providing member provides pressure to the movable electrode toward the second fixed electrode when the movable electrode and the second fixed electrode are in contact with each other.
delete delete delete delete delete A connection member driving unit connected to the connection member and having a rotation axis portion rotated in conjunction with insertion and blocking of the electrode bar of the connection member;
A switch unit fixed to the cradle body so as to be spaced apart from the connection member driving unit and comprising a plurality of the limit switches of the first aspect; And
And a switch operating unit that is driven in conjunction with the rotary shaft portion to temporarily operate or stop the plurality of switches when the electrode bar of the connection member is closed or closed.
8. The apparatus according to claim 7, wherein the switch operation unit
A rotary member fixed to the rotary shaft and rotated in conjunction with the rotary shaft; And
And a switch operating member which is rotated by the rotating member when the rotating member rotates to operate or stop the plurality of limit switches.
KR1020150062621A 2015-04-21 2015-05-04 Limit switch and circuit breaker using the same KR101734049B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
KR1020150062621A KR101734049B1 (en) 2015-05-04 2015-05-04 Limit switch and circuit breaker using the same
CN201610250341.3A CN106067395B (en) 2015-04-21 2016-04-21 Limit switch and breaker

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020150062621A KR101734049B1 (en) 2015-05-04 2015-05-04 Limit switch and circuit breaker using the same

Publications (2)

Publication Number Publication Date
KR20160130903A KR20160130903A (en) 2016-11-15
KR101734049B1 true KR101734049B1 (en) 2017-05-25

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Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100972935B1 (en) 2008-03-20 2010-07-28 엘에스산전 주식회사 Apparatus for indicating on/off state of air circuit breaker

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