KR101740940B1 - Knife type switch - Google Patents

Knife type switch Download PDF

Info

Publication number
KR101740940B1
KR101740940B1 KR1020150057027A KR20150057027A KR101740940B1 KR 101740940 B1 KR101740940 B1 KR 101740940B1 KR 1020150057027 A KR1020150057027 A KR 1020150057027A KR 20150057027 A KR20150057027 A KR 20150057027A KR 101740940 B1 KR101740940 B1 KR 101740940B1
Authority
KR
South Korea
Prior art keywords
knife
interlock
latch
frame
electrode plate
Prior art date
Application number
KR1020150057027A
Other languages
Korean (ko)
Other versions
KR20160126218A (en
Inventor
조승곤
Original Assignee
현대일렉트릭앤에너지시스템(주)
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 현대일렉트릭앤에너지시스템(주) filed Critical 현대일렉트릭앤에너지시스템(주)
Priority to KR1020150057027A priority Critical patent/KR101740940B1/en
Publication of KR20160126218A publication Critical patent/KR20160126218A/en
Application granted granted Critical
Publication of KR101740940B1 publication Critical patent/KR101740940B1/en

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H21/00—Switches operated by an operating part in the form of a pivotable member acted upon directly by a solid body, e.g. by a hand
    • H01H21/02—Details
    • H01H21/18—Movable parts; Contacts mounted thereon
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/36—Contacts characterised by the manner in which co-operating contacts engage by sliding
    • H01H1/42—Knife-and-clip contacts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H21/00—Switches operated by an operating part in the form of a pivotable member acted upon directly by a solid body, e.g. by a hand
    • H01H21/54—Lever switches with blade-type contact co-operating with one or two spring-clip contacts, e.g. knife switch
    • 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
    • H01H31/02—Details

Landscapes

  • Contacts (AREA)

Abstract

The knife switch according to the present invention includes a frame, a knife and a latch. With this configuration, the operation of the knife switch can be expected to be reliable, and the effect of preventing an arc between the electrode and the switch can be obtained.

Description

Knife switch {KNIFE TYPE SWITCH}

The present invention relates to a knife switch comprising a rotatable and energizable knife for controlling the flow of electric power in an electric circuit.

The knife switch includes a hinge and a knife. The knife is made of a metal material and can rotate through a hinge. When the knife touches the outer electrode plate, the circuit is closed. When the knife is separated from the outer electrode plate, the circuit is opened. Knife switches can also be used as ground switches in three-phase circuits. In this case, the electrode plate on which the knife switch contacts is a reference potential.

In the situation where the knife switch contacts the outer electrode plate, Lorentz's force, which is an electromagnetic force, acts, which can generate a repulsive force between the knife and the electrode plate. When repulsive force is generated in this way, the knife may fall off the electrode plate, which may cause problems in implementing the function of the circuit.

Patent Literature: Patent No. 0976538 B1

SUMMARY OF THE INVENTION It is an object of the present invention to provide a knife switch that is fixed to the electrode plate even when an electromagnetic force is generated in a situation where the knife switch contacts the external electrode plate.

According to an aspect of the present invention, there is provided a knife switch comprising: a frame; A knife that includes a fixing protrusion and is detachably attached to an outer fixed electrode plate connected to the frame; And a latch which is connected to the frame and is rotatable, wherein the fixing protrusion is in contact with the latch and moves to the fixing plate when the knife rotates in a direction approaching the electrode plate, As shown in Fig.

The knife switch according to an embodiment of the present invention may further include a latch elastic part connected to the frame and providing an elastic force such that the knife contacts the latch when the knife rotates in a direction approaching the electrode plate; . ≪ / RTI >

Further, the frame may include a rotation restricting projection, and the latch may be connected to the rotation restricting projection to form a rotation restricting portion that restricts the rotation radius of the ratchet.

The knife may include an induction protrusion. The protrusion may form a protrusion guide surface. When the knife rotates, the protrusion may contact the protrusion guide surface to rotate the rat.

In addition, the knife switch according to an embodiment of the present invention is connected to the frame and is movable so that the knife is not rotated in a direction away from the electrode plate in a state where the fixing protrusion is fitted in the fixing groove, And an interlock which can be brought into contact with the interlock.

Further, the knife switch according to an embodiment of the present invention includes a bar-shaped interlock which is movable in the longitudinal direction in contact with the interlock, and the interlock is connected to the frame to provide an elastic force Wherein when the interlock is moved in one direction, the interlock is moved by the interlock bar, and when the interlock bar is moved in the other direction, the interlock is provided with an elastic force from the interlock elastic portion Can be moved.

According to another aspect of the present invention, there is provided a knife switch including: a drive shaft connected to the frame to provide rotational force; And a link connecting the drive shaft and the knife to transmit the rotational force from the drive shaft to the knife.

Further, the knife switch according to an embodiment of the present invention includes a handle connected to the interlock bar, and the interlock bar and the drive shaft are disposed such that the longitudinal direction of the interlock bar and the axial direction of the drive shaft are aligned And when the handle is moved in one direction, the interlock can be moved by the interlocking bar which receives the driving force from the handle.

The knife switch according to an embodiment of the present invention has the effect of being fixed to the electrode plate even when an electromagnetic force is generated in a situation where the knife switch contacts the external electrode plate.

1 is a side view of a knife switch according to an embodiment of the present invention.
FIGS. 2A, 2B, 2C, and 2D are views sequentially showing the operation of the knife switch according to an embodiment of the present invention.
3 is a view showing a latch and a latch elastic part according to an embodiment of the present invention.
4 is a perspective view showing a drive shaft and a link according to an embodiment of the present invention.
5A and 5B are diagrams illustrating the operation of the handle and interlock according to one embodiment of the present invention.
Figures 6a and b are diagrams illustrating the operation of interlocks and interlocks in accordance with one embodiment of the present invention.

Hereinafter, 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 side view of a knife switch according to an embodiment of the present invention, and FIGS. 2a, 2b, 2c, and 2d are views sequentially illustrating operations of the knife switch according to an embodiment of the present invention. FIG. 3 is a view showing a latch and a latch elastic part according to an embodiment of the present invention, and FIG. 4 is a perspective view showing a drive shaft and a link according to an embodiment of the present invention. 5A and 5B illustrate operation of a handle and an interlock according to an embodiment of the present invention, and Figs. 6A and 6B illustrate operations of an interlock and an interlock according to an embodiment of the present invention.

An embodiment of the present invention will be described with reference to Fig. The knife switch 10 according to an embodiment of the present invention may include a frame 100, a knife 200, and a latch 300. The frame 100 may include a knife hinge portion 110 and a latching portion 120. Accordingly, the knife 200 can be connected to the knife hinge 110 and rotated, and the latch 300 can be connected to the latch 120 to rotate. The link 600 and the drive shaft 500 are sequentially connected to the knife 200 so that the driving force can be transmitted from the drive shaft 500 to the knife 200. The knife elastic supporter 250 may connect the frame 100 and the knife 200 to provide an elastic force to the knife 200.

The knife 200 connected to the knife hinge 110 and rotating may be in contact with the electrode plate 1 fixed to the outside. The knife 200 may include a metal material, so that the knife 200 may be connected to the electrode plate 1 to be energized.

When the knife 200 is connected to the electrode plate 1 and is energized, a Lorentz force, which is an electromagnetic force, may act between the knife 200 and the electrode plate 1. That is, a force pushing each other acts between the knife 200 and the electrode plate 1, so that the knife 200 can be separated from the electrode plate 1. When the knife 200 is separated from the electrode plate 1, the knife switch 10 according to the embodiment of the present invention can not function as a switch.

In order to prevent this, a latch 300 connected to the frame 100 may perform a function of fixing the knife 200. For this, the knife 200 may include a fixing protrusion 210, and the latch 300 may include a fixing groove 310. When the knife 200 rotates in a direction approaching the electrode plate 1, the knife 200 can rotate while being in contact with the latch 300, and the fixing protrusion 210 can be rotated in the fixing groove 310 so that the knot 200 can be fixed by the latch 300.

A latch elastic portion 350 is connected to the latch 300 to allow the latch 300 to be inserted into the latch groove 300 when the knife 200 is rotated. An elastic force can be provided. When the knife 200 rotates in a direction in contact with the electrode plate 1 in a state where the latch 300 is provided with an elastic force, the fixing protrusion 210 moves while riding the latch 300, The latch 300 is rotated by the fixing protrusion 210. When the knob 200 rotates and contacts the electrode plate 1 while the fixing protrusion 210 and the latch 300 contact with each other, the fixing protrusion 210 is inserted into the fixing groove 310 can do. The interlock 400 is rotated in a state where the interlock 400 is not in contact with the latch 300 during the rotation of the latch 300 until the fixing protrusion 210 is fitted into the fixing groove 310, (300) can be rotated.

Meanwhile, the latch 300 may be provided with an elastic force by the latch elastic portion 350, so that it may be necessary to restrict the rotation of the latch 300. FIG. The frame 100 may include a rotation limiting protrusion 130 and the latch 300 may be connected to the rotation limiting protrusion 130 to limit a rotation radius of the latch 300, 320). For example, the rotation restricting part 320 may be formed in a shape of a hole having a longitudinal direction in the latch 300. It can be seen from FIG.

Meanwhile, the knife switch 10 according to an embodiment of the present invention may include an interlock 400 as shown in FIGS. 5A and 5B. Even if a repulsive force is generated between the knife 200 and the electrode plate 1 while the interlock 400 and the fixing protrusion 210 are fitted in the fixing hole 310, The knife 200 can be fixed by restricting the rotation of the latch 300. Meanwhile, when the knife 200 is rotated in a direction away from the electrode plate 1, the interlock 400 may not be in contact with the latch 300 so that the latch 300 can be rotated have. The operation of the interlock 400 and the latch 300 will be described later.

An embodiment of the present invention will be described with reference to Figs. 2A, 2B, 2C and 2D. 2a, 2b, 2c and 2d, the knife 200 contacts the latch 300 while the knife 200 rotates in a direction tangential to the electrode plate 1, and finally the fixing protrusions 210 ) Is inserted into the fixing groove 310. As shown in FIG. The fixing protrusion 210 may contact the latch 300 when the knife 200 rotates in a direction tangential to the electrode plate 1 and the knife 200 may contact the latch protrusion 220 So that the guide protrusion 220 can be brought into contact with the latch 300. Further, the latch 300 may form a protrusion guide surface 330 as a contact surface of the knife 200 when the knife 200 rotates.

The knife 200 may be coupled to the frame 100 to rotate and the knife elastic support 250 may be connected to the knife 200 to provide an elastic force to the knife 200. When the knife 200 is in contact with the electrode plate 1, the knife 200 is not only fixed by the latch 300, but also by using the elastic force provided by the knife elasticizer 250, It is possible to expect an effect of suppressing falling off from the electrode plate 1.

2A shows a state in which the knife 200 is not yet operated. The knife 200 is not yet in contact with the latch 300 and the latch 300 receives an elastic force by the latch elastic portion 350 and the rotation of the latch 300 is restricted by the rotation restricting portion 320 Maintain a constant position.

2B shows a state in which the knife 200 is operated. The guide protrusion 220 transmits the rotational force of the knife 200 to the latch 300 while contacting the protrusion guide surface 330. Therefore, if the rotational force transmitted from the knife 200 is designed to be greater than the elastic force of the latch elastic portion 350, the latch 300 can rotate in the same direction as the knife 200 rotates . As the knife 200 rotates, the fixing protrusions 210 and the fixing grooves 310 move toward each other while moving.

FIG. 2C shows a state in which the knife 200 approaches the electrode plate 1. FIG. The fixing protrusion 210 is in a state of being close to the fixing groove 310. FIG. 2D shows a state where the knife 200 is in contact with the electrode plate 1, and the fixing protrusion 210 is inserted into the fixing groove 310 at this time. When the knife 200 is rotated in a direction away from the electrode plate 1 even though the fixing protrusion 210 is inserted into the fixing groove 310, The latch 300 can be rotated in a direction opposite to the rotation direction of the knife 200 so that the fixing protrusion 210 can escape from the fixing groove 310. Therefore, when the fixing protrusion 210 is fitted in the fixing groove 310, the interlock 400 contacts the latch 300, and rotation of the latch 300 can be suppressed. That is, with respect to the direction in which the knife 200 contacts the electrode plate 1, the interlock 400 can suppress the rotation of the latch 300, and in the opposite direction, (320). 6A shows the interlock 400 that restrains the rotation of the latch 300 in contact with the latch 300. FIG.

When the knife 200 is brought into contact with the electrode plate 1, the knife 200 is fixed by the latch 300 so that electromagnetic waves are generated between the knife 200 and the electrode plate 1, The knife 200 can be held in contact with the electrode plate 1 even if a repulsive force is generated.

The process of moving the knife 200 away from the electrode plate 1 will be described. Before the driving force is transmitted to the knife 200, the latch 300 must be released from the interlock 400. Therefore, the interlock 400 may not contact the latch 300 before the knife 200 rotates in a direction away from the electrode plate 1. This process is illustrated in Figures 6a and b.

2d to FIG. 2c, as the knife 200 rotates in a direction away from the electrode plate 1, the guide protrusion 220 transmits a rotational force to the protrusion guide surface 330 If the rotational force transmitted to the latch 300 is designed to be larger than the elastic force of the latch elastic part 350, the latch 300 is rotated so that the locking protrusion 210 is removed from the fixing groove 310 .

An embodiment of the present invention will be described with reference to FIG. 3 is a view showing a latch and a latch elastic part according to an embodiment of the present invention. The latch 300 may include the fixing groove 310, the rotation restricting portion 320, and the protrusion guide surface 330. The fixing protrusion 210 is fitted into the fixing groove 310 to fix the knife 200. The rotation limiting portion 320 may limit the rotation of the latch 300. [ Here, the rotation restricting part 320 may be formed in a shape of a groove so as to limit a rotation angle. As the knife 200 rotates, the rotational force of the knife 200 can be transmitted to the latch 300 through the protrusion guide surface 330. The latch 300 may be coupled to the latch elastic portion 350 to provide an elastic force to the latch 300.

An embodiment of the present invention will be described with reference to Fig. The knife switch 10 according to an embodiment of the present invention may include the drive shaft 500 and the link 600. [ The drive shaft 500 may be coupled to the frame 100 and the link 600 connects the drive shaft 500 and the knife 200 so that the knife 200 is rotated from the drive shaft 500. [ As shown in Fig. The link 600 connects the drive shaft 500 and the knife 200 so that both ends of the link 600 are connected to the pins provided by the drive shaft 500 and the knife 200, So that it can rotate.

An embodiment of the present invention will be described with reference to Figs. 5A and 5B. The knife switch 10 according to an embodiment of the present invention may include a handle 700 and a handle connection 800 and may include an interlock 450. The interlock 450 may be rod-shaped and movable in the longitudinal direction in contact with the interlock 400. The interlock 450 and the drive shaft 500 may be disposed such that the longitudinal direction of the interlock 450 and the axial direction of the drive shaft are parallel to each other. 5A shows a state in which the handle 800 is not moved and a restriction is applied to the rotation of the latch 300 by the interlock 400. FIG. 5B shows a state in which the handle 800 is moved The interlock 400 is pushed by the interlock 450 so that the interlock 400 is separated from the rotation path of the latch 300. FIG.

5B, the handle connecting portion 800 may have an elastic force and may be connected to one side of the driving shaft 500 and the handle 700. When the handle 700 moves in one direction, that is, when the handle 700 advances toward the frame 100, the interlock 450 contacting the handle 700 can also advance. Since the interlock 400 may be connected to one side of the interlock 450, the interlock 400 may move. As the interlock 400 moves, there is no restriction on the rotation of the latch 300, so that the latch 300 can rotate. When the handle 700 is retracted again, the interlock bars 450 are also retracted. The interlock 400 is connected to the frame 100 so as to allow the interlock 400 to move in the opposite direction when the interlock 450 is retracted, . ≪ / RTI > Although not shown in the drawing, a sliding device may be mounted at a connecting portion between the interlock 450 and the interlock 400, in addition to the interlock elastic portion 410, so that when the interlock 450 is advanced or retracted So that the interlock 400 can be interlocked and moved.

An embodiment of the present invention will be described with reference to Figs. 6A and 6B. 6A and 6B may correspond to Figs. 5A and 5B, respectively. 6A shows the relationship between the interlock 450 and the interlock 400 in the state of FIG. 5A. Since the interlock 400 is not in a state of being subjected to the force by the interlock 450, The rotation of the latch 300 can be restricted by the elastic force of the interlock elastic part 450 and the interlock 400 is positioned on the rotation path of the latch 300. [ 6B, when the interlock 450 is moved forward to move the interlock 400, the interlock 400 is released on the rotation path of the latch 300, 300 may not be restricted.

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. It is to be understood that various changes and modifications may be made without departing from the scope of the appended claims.

1: electrode plate 10: knife switch
100: frame 110: knife hinge
120: latching part 130: rotation restricting projection
200: Knife 210: Fixing projection
220: guide protrusion 250: knife elasticizer
300: Latch 310: Fixing groove
320: rotation restricting portion 330: protrusion guiding surface
350: Latch elastic part 400: Interlock
410: Interlock elastic part 450: Interlock
500: drive shaft 600: link
700: handle 800: handle connection

Claims (8)

frame;
A knife which includes a fixing protrusion and is rotatably connected to the frame in one direction and the other and is detachably attached to an electrode plate fixed to the outside;
A latch including a fixing groove and rotatably connected to the frame in one direction and the other; And
And an induction projection provided on the knife and pressing the rattle according to the rotation of the knife to rotate the rattle,
Wherein when the latch is rotated in one direction, the fixing groove is disposed in the rotation locus of the fixing protrusion and the fixing groove is deviated from the rotation locus of the fixing protrusion when the latch is rotated to the other,
Wherein when the knife is rotated to the other side and connected to the electrode plate, the fixing protrusion is fitted into the fixing groove so that the rattle suppresses one-way rotation of the knife.
The method according to claim 1,
And a latch elastic portion connected between the frame and the latch to provide an elastic restoring force to the latch in the direction of the guiding projection.
3. The method of claim 2,
Wherein the frame includes a rotation restricting projection,
Wherein the latch is formed with a rotation restricting portion connected to the rotation restricting projection to limit a rotation radius of the ratchet.
The method of claim 3,
The lattice forming a projection-inducing surface,
And when said knife rotates, said guide projection comes into contact with said projection guide surface to rotate said rattle.
5. The method according to any one of claims 1 to 4,
And an interlock connected to the frame and capable of contacting the latch so that the knob is not rotated in a direction away from the electrode plate when the fixing protrusion is fitted in the fixing groove.
6. The method of claim 5,
And a bar-shaped interlocker movable in the longitudinal direction in contact with the interlock,
Wherein the interlock includes an interlock elastic portion connected to the frame to provide an elastic force,
Wherein when the interlock is moved in one direction, the interlock is moved by the interlock bar, and when the interlock bar is moved in another direction, the interlock is moved by receiving elastic force from the interlock elastic portion.
The method according to claim 6,
A drive shaft connected to the frame to provide a rotational force; And
And a link connecting the drive shaft and the knife to transmit a rotational force from the drive shaft to the knife.
8. The method of claim 7,
And a handle coupled to the interlock bar,
The interlock bar and the drive shaft are disposed such that the longitudinal direction of the interlock bar and the axial direction of the drive shaft are parallel to each other,
And the interlock is moved by an interlock bar which is moved by receiving a driving force from the handle when the handle moves in one direction.
KR1020150057027A 2015-04-23 2015-04-23 Knife type switch KR101740940B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020150057027A KR101740940B1 (en) 2015-04-23 2015-04-23 Knife type switch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020150057027A KR101740940B1 (en) 2015-04-23 2015-04-23 Knife type switch

Publications (2)

Publication Number Publication Date
KR20160126218A KR20160126218A (en) 2016-11-02
KR101740940B1 true KR101740940B1 (en) 2017-05-31

Family

ID=57518626

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020150057027A KR101740940B1 (en) 2015-04-23 2015-04-23 Knife type switch

Country Status (1)

Country Link
KR (1) KR101740940B1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102437643B1 (en) 2022-02-28 2022-08-29 주식회사 누리라인 Knife Switch for AC and DC for Railway Vehicles
KR102437644B1 (en) 2022-02-28 2022-08-29 주식회사 누리라인 High Voltage Knife Switch for Railway Vehicles

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4591678A (en) 1984-10-26 1986-05-27 Square D Company High power switching apparatus
KR200231573Y1 (en) * 2001-02-16 2001-07-19 현대중공업 주식회사 Making-proof type earthing switch
JP2004071241A (en) 2002-08-02 2004-03-04 Fuji Electric Holdings Co Ltd Circuit breaker

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4591678A (en) 1984-10-26 1986-05-27 Square D Company High power switching apparatus
KR200231573Y1 (en) * 2001-02-16 2001-07-19 현대중공업 주식회사 Making-proof type earthing switch
JP2004071241A (en) 2002-08-02 2004-03-04 Fuji Electric Holdings Co Ltd Circuit breaker

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102437643B1 (en) 2022-02-28 2022-08-29 주식회사 누리라인 Knife Switch for AC and DC for Railway Vehicles
KR102437644B1 (en) 2022-02-28 2022-08-29 주식회사 누리라인 High Voltage Knife Switch for Railway Vehicles

Also Published As

Publication number Publication date
KR20160126218A (en) 2016-11-02

Similar Documents

Publication Publication Date Title
KR101740940B1 (en) Knife type switch
JP2011108648A (en) Lock device of circuit breaker
US10811209B2 (en) Switching mechanism of circuit breaker
KR100957493B1 (en) Device for locking case door of vacuum circuit breaker board
EP3389075B1 (en) Movable contact assembly for circuit breaker
KR200482658Y1 (en) Interlock Device of Switch of Ring Main Unit
KR101508501B1 (en) Connecter assembly
KR200479581Y1 (en) Connecter assembly
KR101692787B1 (en) Air circuit breaker
JP2009289484A (en) Interlock breaking mechanism for circuit breaker
JP2010251160A (en) Interlocking device of switch
EP2736064B1 (en) Trip device and circuit breaker for electric wiring having same
KR101667636B1 (en) Mechanical Interlock of Circuit Breaker
KR101015276B1 (en) Elastic pressing unit and molded case circuit breaker having the same
KR102018870B1 (en) Draw-in and draw-out device of circuit braker
JP6319837B2 (en) Power circuit breaker
KR20120027729A (en) Lever type circuit swiching device for power supply
KR101775376B1 (en) Closing spring charging device of circuit breaker
KR102226948B1 (en) Apparatus For Instant Trip Current
JP6896172B2 (en) Circuit breaker
KR200477245Y1 (en) Circuit breaker with qucik making mechanism
KR101702537B1 (en) Switch driving device
KR20180020488A (en) Circuit breaker
KR100499330B1 (en) Key lock device for circuit breaker
KR101413859B1 (en) Multi pole circuit breaker

Legal Events

Date Code Title Description
A201 Request for examination
E902 Notification of reason for refusal
E701 Decision to grant or registration of patent right
GRNT Written decision to grant