KR20190001731U - Shooter mechanism for molded case circuit breaker - Google Patents

Abstract

The present invention provides a shoe device for a wiring breaker which can return a shoe to an initial position when a state of an opening / closing mechanism is initialized by interlocking with a manual operation handle of a wiring breaker. The shoe device of the wiring breaker according to the present invention, An operating portion rotatable in one direction for tripping the body portion and the wiring breaker, an initial position where the position is confined, and a restraining hook portion having a rotating position that frees and frees when the trip breaker of the wiring breaker trips, and a pair of hinge portions Shooter; A spring having one end contacting and pressing the shooter and the other end supported on the inter-phase insulating barrier of the circuit breaker; And a circuit breaker which is rotatably provided on a turning path of a manual operation handle of the circuit breaker so as to transmit the driving force of the manual operation handle to the shooter so that the shoe returns to the initial position when the manual operation handle is operated to the OFF position, And a lever.

Description

[0001] SHOOTER MECHANISM FOR MOLDED CASE CIRCUIT BREAKER [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wiring breaker, and more particularly, to a shoater mechanism (SHOOTER MECHANISM) for transmitting a turning force of a cross bar rotated by a trip mechanism (TRIP MECHANISM) will be.

(Patent Document 1) KR20-0218816 Y1

However, since the initialization means for returning the shooter to the initial position constrained by the cross bar can not be started, the state of the opening / closing mechanism is initialized by operating the manual operation handle of the circuit breaker after the trip operation to the off position There is a problem that the shooter can not return to the initial position.

Further, since the shooter device is installed on the inter-phase insulating barrier in the case of the trip mechanism (TRIP MECHANISM), since the spring for elastically pressing the shooter to the trip position is provided on the inter-phase insulating barrier, There is a high risk of failing by the spring.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a circuit breaker capable of returning a shoe to an initial position when initializing the state of an opening / closing mechanism in cooperation with a manual operation handle of a circuit breaker Thereby providing a shooter device.

Another object of the present invention is to provide a shield device for a wiring breaker with improved inter-phase insulation that can eliminate the possibility of insulation failure between phases due to a spring even if a shoe device is provided on an inter-phase insulating barrier in the enclosure of the trip mechanism.

One object of the present invention is to provide a shooter apparatus for a wiring breaker,

An operating portion which is formed to extend from the body portion to one side of the body portion and is capable of rotating in one direction for tripping the wiring breaker, an initial position where the position is restricted, and a pivoting position A shooter having a locking hook portion formed to extend from the body portion on the opposite side of the operation portion and a pair of hinge portions protruding from the body portion in both lateral directions to provide the rotation axis portion; A spring having one end for contacting and pressing the shooter so as to pressurize the shooter so as to rotate in the one direction, and the other end supported on the inter-phase insulating barrier of the circuit breaker; And a circuit breaker which is rotatably provided on a pivoting path of a manual operation handle of the wiring breaker so as to transmit the driving force of the manual operation handle to the shoe so that the shoe returns to the initial position when the manual operation handle is operated to the OFF position And a reset lever (RESET LEVER) which is provided in the circuit breaker.

Another object of the present invention is to provide a semiconductor device comprising: a spring supporting protrusion protruded upward on the inter-phase insulating partition wall to support the other end of the spring; And a spring insulation wall portion protruding upward on the interstage insulation partition wall to surround the spring support protrusion and formed of an electrically insulating material. .

According to a preferred aspect of the present invention, the shield device of a wiring breaker according to the present invention is provided with a spring support protrusion and a spring insulation wall, which provide a space in which the other end of the spring is provided, And a first channel portion provided between the first and second channels.

According to another preferred aspect of the present invention, the shield device of a wiring breaker according to the present invention further includes a second channel portion provided around the first channel portion to further increase the creepage insulation distance.

According to another preferred aspect of the present invention, the spring insulation wall portion includes an opening portion opened to the side opposite to the side on which the operation portion extends so that the spring can be easily attached and detached.

According to another preferred aspect of the present invention, the shooter is formed to extend from the body portion toward the rotation path side of the reset lever, and receives a drive force for returning the shooter to the initial position from the reset lever .

According to another preferred aspect of the present invention, the reset lever comprises: a pivot shaft; A first lever portion rotatable about the pivot shaft and extending to the manual operation handle side; And a second lever portion rotatable about the pivot shaft and extending toward the return power receiving portion.

According to another preferred aspect of the present invention, the reset lever includes a first lever portion extending from the first lever portion toward the pivotal path of the manual operation handle so as to be in contact with the manual operation handle, 1 power transmission part; And a second power transmitting portion formed to extend from the second lever portion toward the turning path of the return power receiving portion so as to contact the return power receiving portion and provide a driving force.

A shoe device of a wiring breaker according to the present invention is rotatably provided in a pivoting path of a manual operation handle of a shoe, a spring for elastically pressing the shoe to rotate in the one direction, and a wiring breaker, And a reset lever for transmitting the driving force of the manual operation handle to the shooter so that the shoe returns to the initial position when the manual operation handle is operated. Therefore, when the manual operation handle is turned to the off position, the driving force of the manual operation handle is transmitted to the shooter The effect of returning the shooter to the initial restraining position can be obtained.

The present invention also provides a shield device for a wiring breaker, which includes a spring insulating wall portion protruding upward from an inter-phase insulating barrier wall surrounding the spring supporting protrusion and formed of an electrically insulating material, It is possible to obtain an effect that the spring insulation wall portion can be cut off.

Since the shoe device of the wiring breaker according to the present invention further includes the first channel part provided between the spring supporting protrusion part and the spring insulating wall part, it is possible to provide a space in which the other end of the spring is provided, The effect can be obtained.

The shield device of the wiring breaker according to the present invention further includes a second channel portion provided in the periphery of the first channel portion, so that an effect of further increasing the creepage insulation distance can be obtained.

In the shielding device for a wiring breaker according to the present invention, the spring insulating wall portion includes an opening portion opened to the opposite side of the one side from which the action portion extends, so that a tool such as a driver can be inserted through the opening portion, Effect can be obtained.

In the shooter apparatus for a wiring breaker according to the present invention, the shooter further includes a return power receiving portion, so that the return power receiving portion can receive the driving force from the reset lever and return the shooter to the initial position (initial restraining position).

The reset lever includes a pivot shaft, a first lever portion extending to the manual operation handle side, and a second lever portion extending toward the return power reception portion, So that it can approach the manual operation handle side and approach the recovery power receiving side of the shooter through the second lever portion.

The reset lever includes a first power transmitting portion extending from the first lever portion toward a turning path of the manual operating handle, and a second power transmitting portion extending from the second lever portion to the return driving force, The second power transmitting portion is formed so as to extend toward the turning path of the receiving portion, so that the second power transmitting portion can receive a pressing force and contact with the manual operating handle through the first power transmitting portion, and comes into contact with the return power receiving portion through the second power transmitting portion It is possible to provide a driving force.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a longitudinal sectional view of a wiring breaker provided with a shoe apparatus according to a preferred embodiment of the present invention,
FIG. 2 is a view showing the state of the restraining part showing the initial restraint state of the shooter device according to the preferred embodiment of the present invention,
FIG. 3 is a view showing a state of a spindle operation after a shutter mechanism of a wiring breaker operates in a tripping operation according to a preferred embodiment of the present invention,
FIG. 4 is a perspective view of the shooter, viewed from an obliquely downward direction from a rear upper part of the shooter apparatus according to a preferred embodiment of the present invention,
FIG. 5 is a perspective view of the shooter, viewed from an obliquely downward direction from the upper front, of the shooter apparatus according to a preferred embodiment of the present invention,
6 is a perspective view of an enclosure of a trip mechanism showing a support portion of a spring and an enclosure of a trip mechanism provided with the support portion among the shooter devices according to a preferred embodiment of the present invention,
FIG. 7 is a partial vertical cross-sectional view showing a configuration of a spring supporting protrusion, a spring insulating wall, a first channel portion, and a second channel portion as a structure for inserting a spring among the shooter devices according to a preferred embodiment of the present invention,
FIG. 8 is an explanatory view showing a configuration for making a spring surface insulation (a surface insulation) of a spring and a surface movement relationship (a surface movement relationship) of a fault current among the shooter devices according to a preferred embodiment of the invention from the enlarged view of FIG.

The above and other objects and features of the present invention will become more apparent from the following description of the preferred embodiments of the present invention with reference to the accompanying drawings.

Will be described with reference to Figs. 1 to 3. Fig.

First, referring to Fig. 1, the construction of a circuit breaker to which a shooter device according to a preferred embodiment of the present invention is attached will be described.

The wiring breaker 1 is largely divided into fixed contacts SC1 and SC2 and a movable contact MC, opening and closing mechanisms 11, 12, 13, 14 and 19, a cross bar 18, a trip mechanism 20, And arc extinguishing mechanisms 30a and 30b.

The wiring breaker 1 may further include a shooter 15, a spring 16, and a reset lever 17 as a shooter device according to the present invention.

1, reference numeral 21b designates a terminal for connecting an external power circuit.

The fixed contacts SC1 and SC2 are configured to include a terminal portion, a conductor extension portion, and a contact portion, respectively, which can be connected to the power supply side and the load side of the power circuit, respectively.

The movable contact MC is a conductor capable of rotating from a closed position in contact with the fixed contacts SC1 and SC2 to an open position in which it is separated from the fixed contacts SC1 and SC2 and includes an arm portion and a contact portion .

The opening and closing mechanisms 11, 12, 13, 14 and 19 are mechanisms for driving the movable contact MC during a trip operation or a manual opening / closing operation of the movable contact MC. The opening and closing mechanisms 11, 12, 13, 14 and 19 include a manual operation handle 11 for providing the user with means for manually operating the movable contact MC to the open or closed position, A latch 12 for holding the elastic energy in a CHARGING state, a latch holder 13 for restraining or releasing the latch 12, a latch holder 13 for restraining or releasing the latch holder 13, (NAIL) 14 for releasing and a shaft 19 for supporting the movable contact MC. (Not shown) such as a trip spring for providing tripping power, upper and lower links for transmitting a tripping force of the trip spring to the shaft 19, a pair of drive pins for rotating the shaft 19 And it is a well-known configuration, so detailed illustration and description will be omitted.

The cross bar 18 is a constituent element, also called a TRIP BAR, that releases the shooter 15 according to the present invention by driving the trip mechanisms 21a, 22, 23, and 24, (15) by driving the shutter (17).

The cross bar 18 includes a hook portion 18a extending toward the shooter 15 to restrain the shooter 15. [

The trip mechanism 20 senses a fault current such as an overcurrent or a short-circuit current on the power circuit on which the circuit breaker 1 is installed, detects the abnormal current, drives the crossbar 18, Is a mechanism that triggers the opening / closing mechanisms 11, 12, 13, 14, 19 to trip.

The trip mechanism 20 includes a thermal trip mechanism 21a, 22 and an instantaneous trip mechanism 23, 24.

The thermal trip mechanisms 21a and 22 are provided with a heater 21a and a bimetal 21b as a mechanism for driving the cross bar 18 when detecting current conduction of about 120% of the rated current, (22).

The instantaneous trip mechanisms 23 and 24 are devices for driving the cross bar 18 in the case of high current supply such as a short circuit current on the power circuit requiring instantaneous interruption of several times to several tens times of the rated current, And includes an armature 24.

The ARC EXTINGUISHING MECHANISMs 30a and 30b are devices for rapidly ARC EXTINGUISHING an arc ARC generated between the movable contact MC and the fixed contacts SC1 and SC2 during a trip operation and formed as a ferromagnetic body And is a mechanism for laminating a plurality of grids (GRID) to induce and elongate an arc.

2 to 5, the configuration of a shooter apparatus according to a preferred embodiment of the present invention will be described in detail.

As described above, the shield device of the wiring breaker according to the preferred embodiment of the present invention includes the shooter 15, the spring 16, and the reset lever 17. [

4 or 5, the shooter 15 includes a body portion 15a, a working portion 15c, a locking hook portion 15b, and a pair of hinge portions 15d. .

4 or 5, the body portion 15a is the widest part of the center forming the body of the shooter 15. [

The operating portion 15c is formed to extend from the body portion 15a to one side (upper left in the drawing) and is rotatable in one direction (counterclockwise in the drawing) for tripping of the wiring breaker.

When returning to the initial restraining position, the operating portion 15c can be rotated clockwise.

2, when the operating portion 15c rotates in the clockwise direction, the spring 16 is moved by the shooter 15, in particular, the spring support protrusions 15f ), So that elastic energy can be CHARGING.

The restraining hook portion 15b has a portion formed to extend from the body portion 15a on the opposite side of the operating portion 15c and having an initial position where the position is constrained and a pivotal position where the restricting hook portion 15b is released when the circuit breaker 1 is tripped, , And the restraining hook portion 15b may have a hook-shaped portion bent upward at the end portion.

The restraint hook portion 15b is caught and held by the hook portion 18a of the cross bar 18 so that the shooter 15 is restrained to the initial restraining position (state) shown in Fig.

5, the pair of hinge portions 15d are formed to protrude laterally from the body portion 15a so as to provide a rotary shaft portion to the shooter 15. As shown in Fig.

The pair of hinge portions 15d can be supported by being fitted in the hinge support groove portions 25f on the both side wall rear portions forming the openings in the common insulating partition wall 25e described later in Fig.

4 or 5, the shooter 15 further includes a return power receiving portion 15e.

2 or 3, the return power reception portion 15e is formed to extend from the body portion 15a to the rotation path side of the reset lever 17 so that the shooter 15 is moved to the initial position Position) from the reset lever 17. The operation of the reset lever 17 will now be described.

2 or 3, the shooter 15 may further include a spring support protrusion 15f.

The spring support protrusion 15f is formed to extend downward from a lower side of one side of the body portion 15a of the shooter 15 and supports one end (an upper end) of the spring 16.

The spring 16 has one end (upper end) for contacting and pressing the shooter 15 so as to elastically press the shooter 15 to rotate in the one direction (counterclockwise in FIG. 2 or 3) (Lower end) supported on the inter-phase insulating partition walls 25a, 25b, and 25c of FIG.

According to a preferred embodiment, the spring 16 may be constituted by a compression spring that charges elastic energy when compressed and discharges elastic energy that has been stored while being tensioned.

The reset lever 17 is rotatably provided on the turning path of the manual operation handle 11 of the circuit breaker.

When the user operates the manual operation handle 11 to the OFF position, the reset lever 17 controls the drive force of the manual operation handle 11 so that the shooter 15 returns to the initial position (initial restraining position) To the shooter (15).

2 or 3, the reset lever 17 includes a pivot shaft 17a, a first lever portion 17b, and a second lever portion 17c.

2 or 3, the reset lever 17 may further include a first power transmission portion 17e and a second power transmission portion 17d.

The pivot shaft 17a is provided so as to provide a pivot point at which the reset lever 17 can pivot.

 The pivot shaft 17a can be supported by side plates that support the above-described open / close mechanism on both sides in accordance with an embodiment.

The first lever portion 17b is rotatable about a pivot shaft 17a and extends from the center of the reset lever 17 through which the pivot shaft 17a passes.

The second lever portion 17c is rotatable about the pivot shaft 17a and is provided to extend toward the return power receiving portion 15e of the shooter 15. [

The first power transmitting portion 17e is formed so as to extend from the first lever portion 17b toward the turning path of the manual operation handle 11 so as to be able to receive a pressing force against the manual operation handle 11. [

The second power transmitting portion 17d is formed to extend from the second lever portion 17c toward the turning path of the return power receiving portion 15e so as to contact the return power receiving portion 15e and provide a driving force.

According to a preferred aspect of the present invention, the shield device of the wiring breaker according to the embodiment of the present invention further includes an insulating component for isolating the spring 16 from the fault current.

The construction of such an insulating component will be described below with reference to Figs. 6 to 8. Fig.

Figure 6 shows the construction of an isolating component that isolates the spring 16 from an accidental current, but generally shows the enclosure of the trip mechanism, i.e., the trip mechanism case 25, where the isolating component is installed have.

According to a preferred embodiment of the present invention, a conductor portion for forming current conduction paths for each of the four AC poles, that is, the R pole (R phase), the S pole (S phase), the T pole (T phase), and the N pole (N phase) The trip mechanism case 25 shown in Fig. 6 can be formed by molding a synthetic resin material having electrical insulation property for inter-phase insulation of the trip mechanism including one terminal portion.

The trip mechanism case 25 includes one common insulating partition 25e and three interphase insulating walls 25a, 25b and 25c extending from the common insulating partition 25e to one side, a trip mechanism case 25 (Not shown) between any one of the pair of outer side walls 25d and the outer side wall 25d forming the both side wall portions of the upper and lower insulating walls 25a, 25b and 25c, And a bottom portion (not shown) between the insulating barrier ribs 25a, 25b and 25c.

Here, when the wiring breaker is for three-phase alternating current, only two of the three inter-phase insulating partitions may be provided.

In the trip mechanism case 25, the opposite side of the common insulating partition 25e, that is, the front portion in Fig. 6, is opened to allow entry for the installation of the phase trip mechanism.

6, RS designates the R phase trip mechanism accommodation space, SS designates the S phase trip mechanism accommodation space part, TS designates the T phase trip mechanism accommodation space part, NS designates the N phase trip mechanism accommodation space part Indicate. Here, when the wiring breaker is for three-phase alternating current, the N-phase trip mechanism accommodation space portion is not provided.

6, the shield device of the wiring breaker according to the preferred embodiment of the present invention includes a spring support protrusion 25b-2 and a spring insulation wall 25b-1 ).

The spring support protrusion 25b-2 protrudes upward on the insulating partition 25b so as to support the other end of the spring 16.

The spring insulating wall portion 25b-1 is provided so as to protrude upward from the central inter-phase insulating partition wall 25b among the three inter-phase insulating partition walls 25a, 25b and 25c so as to surround the spring supporting protrusion 25b-2 .

The spring insulating wall portion 25b-1 is formed of an electrical insulating material as a part of the trip mechanism case 25 as described above.

According to a preferred aspect of the present invention, the spring insulated wall portion 25b-1 is provided with an opening portion 25b-1 which is opened to the opposite side of the one side on which the operating portion 15c of the shooter 15 extends, (25b-3).

The purpose of forming the opening portion 25b-3 to be opened opposite to the side on which the operating portion 15c of the shooter 15 extends is that the one side on which the operating portion 15c of the shooter 15 extends is a circuit breaker So that the spring 16 can be shielded from the fault current or arc that may be introduced from the opening / closing mechanism side.

On the other hand, the construction of a further portion of the insulating component for isolating the spring 16 from the fault current will be described with reference to FIGS. 7 and 8. FIG.

7 or 8, according to a preferred aspect of the present invention, the shroud device of the circuit breaker according to the embodiment of the present invention is characterized in that the additional And may further include a first channel portion 25b-4 as a portion.

According to a preferred aspect of the present invention, the shield device of a wiring breaker according to an embodiment of the present invention further comprises a second channel portion 25b-5 as an additional portion of the isolation component isolating the spring 16 from the fault current .

The first channel portion 25b-4 has the spring supporting protrusion 25b-2 and the spring insulating wall portion 25b-4 so as to increase the surface insulation distance while providing a space for installing the other end of the spring. -1).

The second channel portion 25b-5 may be additionally provided in the periphery of the first channel portion to further increase the creepage insulation distance.

2 to 3, a trip operation and a return operation to the initial restraining position of the circuit breaker according to the preferred embodiment of the present invention will be described.

First, the operation from the initial restraint position (state) shown in Fig. 2 to the trip operation position (state) shown in Fig. 3 will be described.

When a fault current such as an overcurrent or a short-circuit current is generated on the power circuit to which the wiring breaker is connected, the cross bar 18 is driven by the above-mentioned trip mechanism 20 (not shown in FIG. 2 or 3) Lt; / RTI >

The hook portion 18a of the cross bar 18 is released from the restraining hook portion 15b of the shooter 15 and the shooter 15 is released.

The spring 16 which has been compressed in the initial restraining position (state) and stores the elastic energy is depressed, and the elastic energy of the spring 16 is released, and the resilient energy of the spring 16 rotates the shoe 15 in the counterclockwise direction .

The operating portion 15c of the shoe 15 rotating in the counterclockwise direction releases the latch holder 13 which has been restrained while the nail 14 is rotated in the clockwise direction by pressing the nail 14. [

The latch holder 13 is rotated in the clockwise direction to release the latch 12 which has been restrained.

The shaft (refer to reference numeral 19 in Fig. 1) is rotated through the link mechanism not shown by the elastic force of the trip spring (not shown) according to the release of the latch 12, and the movable contact SC1 and SC2 in Fig. 1).

Therefore, the automatic circuit breaking (trip) operation is accomplished by separating the power supply side and the load side of the power circuit connected to both fixed contacts (see SC1 and SC2 in Fig. 1).

Next, the operation from the trip operation position (state) shown in Fig. 3 to the initial restraint position (state) shown in Fig. 2 will be described as follows.

When the user operates the manual operation handle 11 to the off position in order to remove the cause of the occurrence of the fault current in the trip operation position (state) shown in Fig. 3 and initialize the circuit breaker, The first power transmitting portion 17e of the reset lever 17 is pushed downward while rotating further in the clockwise direction from the state shown in Fig.

Therefore, the reset lever 17 rotates in the counterclockwise direction about the pivot shaft 17a, and the second power transmission portion 17d is returned to the shoe 15 by the counterclockwise rotation of the reset lever 17. [ And pushes the power receiving portion 15e upward.

Then, the shooter 15 rotates in the clockwise direction, and the restraining hook portion 15b of the shooter 15 is caught by the hook portion 18a of the cross bar 18 and is stopped.

Thus, the return to the initial restraining position of the shooter 15 can be completed.

At this time, the initializing operation of the opening and closing mechanism is also performed in parallel, so that the latch 12 is restrained by the latch holder 13 and the latch holder 13 is returned to the initial position where it is restrained by the nail 14.

When the user operates the manual operation handle 11 to the ON position in order to reconnect (input) the power circuit in the state where the switch is returned to the initial position, the circuit breaker becomes the state shown in Fig.

Referring to FIG. 6, the effect of insulation effect of the spring in the shooter apparatus for a wiring breaker according to a preferred embodiment of the present invention will be described.

If a fault current such as an overcurrent or a short-circuit current is generated in the power circuit to which the circuit breaker is connected, a fault current that may flow through the upper central opening of the common insulating partition 25e for installing the shooter, With respect to the arc, the spring (refer to reference numeral 16 in Fig. 1 and the like) can be shielded and insulated by the spring insulation barrier rib portion 25b-1 according to the present invention.

Also, when a fault current such as an overcurrent or a short-circuit current occurs in the power circuit to which the wiring breaker is connected, the tripping mechanism provided in the S phase tripping mechanism accommodation space SS and the T phase tripping mechanism accommodation space TS, The spring (see reference numeral 16 in FIG. 1 and the like) is shielded and insulated by the spring insulating barrier rib portion 25b-1 according to the present invention with respect to the fault current that can flow through the surface of the insulating partition 25b have.

The effect of the surface insulation effect of the insulation component in a shield device of a wiring breaker according to a preferred embodiment of the present invention will be described with reference to FIG.

With respect to the fault current FC that can flow through the surface of the inter-phase insulating partition 25b from the trip mechanism provided in the S phase tripping mechanism accommodating space SS and the T phase tripping mechanism accommodating space TS, When the surface distance (creepage distance) is flat due to the spring insulation barrier rib portion 25b-1, the first channel portion 25b-4, and the second channel portion 25b-5, The surface insulation distance to the fault current FC can be increased.

1: Circuit breaker 11: Manual operation handle
12: latch 13: latch holder
14: Nail 15: Shooter
15a: Body portion 15b: Restraint hook portion
15c: working portion 15d: hinge portion
15e: return power receiving portion 15f: spring supporting protrusion
16: spring 17: reset lever
17a: Pivot shaft 17b: First lever part
17c: second lever portion 17d: second power transmission portion
17e: first power transmission portion 18: cross bar
18a: hook portion 19: shaft
20: trip mechanism 21a: heater
21b: terminal portion 22: bimetal
23: electromagnet part 24: amateur
SC1, SC2: fixed contact MC: movable contact
25: trip mechanism case 25a, 25b, 25c:
25b-1: spring insulated wall portion 25b-2: spring supporting protrusion
25b-3: open portion 25b-4: first channel portion
25b-5: second channel portion 25d: outer wall
25e: Common insulating partition 25f: Hinge support groove
RS: R phase trip mechanism accommodation space SS: S phase trip mechanism accommodation space
TS: T-phase trip mechanism accommodation space NS: N-phase trip mechanism accommodation space
30a and 30b:

Claims (7)

In a shoe device for a circuit breaker,
An operating portion which is formed to extend from the body portion to one side of the body portion and is capable of rotating in one direction for tripping the wiring breaker, an initial position where the position is restricted, and a pivoting position A locker hook portion formed to extend from the body portion on the opposite side of the operation portion and a pair of hinge portions protruding from the body portion in both lateral directions to provide the rotation axis portion;
A spring having one end for contacting and pressing the shooter so as to pressurize the shooter so as to rotate in the one direction, and the other end supported on the inter-phase insulating barrier of the circuit breaker;
A spring supporting protrusion protruded upward on the inter-phase insulating partition wall to support the other end of the spring;
A spring insulated wall portion protruding upward from the inter-phase insulating partition wall to surround the spring support protrusion and formed of an electrically insulating material; And
The driving force of the manual operation handle is transmitted to the shovel so that the shovel returns to the initial position when the manual operation handle is turned to the OFF position, And a reset lever (RESET LEVER). The method according to claim 1,
A first channel portion (FIRST CHANNEL PORTION) provided between the spring support protrusion and the spring insulation wall portion to provide a space for installing the other end of the spring and to increase a surface insulation distance Further comprising: a shunt device for a wiring breaker. 3. The method of claim 2,
Further comprising a second channel portion provided on the periphery of the first channel portion to further increase the creeping insulation distance. The method according to claim 1,
Wherein the spring insulation wall portion includes an opening portion that is opened to the opposite side of a side from which the operation portion extends so that the spring can be easily attached and detached. The method according to claim 1,
The shooter,
Further comprising a return power receiving portion formed to extend from the body portion toward the rotation path side of the reset lever and receiving a driving force for returning the shooter to the initial position from the reset lever. 6. The apparatus of claim 5, wherein the reset lever comprises:
Pivot axis;
A first lever portion rotatable about the pivot shaft and extending to the manual operation handle side; And
And a second lever portion rotatable about the pivot shaft and extending toward the returning power receiving portion. 7. The apparatus of claim 6, wherein the reset lever comprises:
A first power transmission part extending from the first lever part toward a turning path of the manual operation handle so as to be in contact with the manual operation handle and to receive a pressing force; And
Further comprising a second power transmitting portion extending from the second lever portion toward a turning path of the return power receiving portion so as to contact the return power receiving portion and provide a driving force, Shooter device.

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