KR20170003126U

KR20170003126U - Motor control center

Info

Publication number: KR20170003126U
Application number: KR2020160001075U
Authority: KR
Inventors: 송봉준
Original assignee: 엘에스산전 주식회사
Priority date: 2016-02-26
Filing date: 2016-02-26
Publication date: 2017-09-05
Also published as: KR200484531Y1

Abstract

The apparatus includes a cabinet; A bus bar disposed within the cabinet; A barrier assembly disposed in front of the bus bar; And a MCC unit having a clip connected to the bus bar, wherein the barrier assembly comprises: a barrier body having a clip through hole through which the clip passes; A shutter rotatably installed on the barrier body and opening and closing the clip through hole; A locker disposed on the barrier body to slide to a first position for locking the shutter and a second position for unlocking the shutter; There is an advantage in that the shutter is operated with high reliability because the shutter is pushed by the MCC unit to open the clip through hole including the locker slider which is retracted by the MCC unit to slide the locker to the second position and the shutter and the barrier body together It can function as a finger probe that blocks the front of the bus bar and prevents the hand from penetrating into the bus bar, and has a high safety advantage.

Description

Motor control center

The present invention relates to a motor control center, and more particularly to a motor control center in which an MCC unit is connected to a bus.

The motor control center (MCC) is a system that safely protects the motor-related load devices installed in various industrial facilities.

The motor control center can distribute the low-voltage electricity supplied by the transformer to the motor, and has the function of monitoring and blocking the overcurrent flow.

The motor control center can accommodate a plurality of electric control devices (hereinafter, referred to as MCC units) in a cabinet (for example, a steel housing), and the MCC unit can be detachably installed in the cabinet for maintenance.

The motor control center can be equipped with a bus bar (bus bar) for supplying electricity to the inside, and the MCC unit can be moved to a drawer and connected to the bus bar.

The motor control center may expose the busbars when the MCC unit is pulled out of the cabinet, in which case there is a high possibility of electric shock. Further, there is a problem that foreign matter such as dust penetrates into the bus bar, which may lead to safety accidents such as fire.

The object of the present invention is to provide a motor control center which can prevent a safety accident and increase the opening / closing accuracy of the shutter.

According to an embodiment of the present invention, a motor control center includes a cabinet; A bus bar disposed inside the cabinet; A barrier assembly disposed in front of the bus bar; And an MCC unit having a clip connected to the busbar, wherein the barrier assembly includes a barrier body having a clip through hole through which the clip passes; A shutter rotatably installed on the barrier body and opening and closing the clip through hole; And a locker disposed in the barrier body to slide to a first position for locking the shutter and a second position for unlocking the shutter, wherein the MCC unit is retracted by the MCC unit to move the locker to the second position A rocker slider for sliding is disposed.

And a locker spring for elastically supporting the locker to the first position.

And a locker spring supporter mounted on the barrier body and supporting the locker spring.

The barrier body may be formed with a locker guide portion in which at least a portion of the locker is inserted and accommodated, and the locker is slidably guided.

The locker guide portion may be formed to protrude rearward at one side of the right and left sides of the clip through-hole.

The shutter may include a pair of shutters that divide and open the clip through-hole.

A first rotating shaft disposed on the barrier body and rotatably supporting any one of the pair of shutters; A first spring for elastically supporting the first rotation axis so that any one of the pair of shutters is rotated to a position where the clip through hole is blocked; A second rotation shaft which is disposed on the barrier body and rotatably supports the other one of the pair of shutters, and a second rotation shaft which rotates the second rotation shaft so that the other one of the pair of shutters is rotated to a position where the clip through- And a second spring for supporting the second spring.

A first rotary shaft support portion rotatably supported by the first rotary shaft and a second rotary shaft support portion rotatably supporting the second rotary shaft may be formed on a rear surface of the barrier body.

The locker may include a locker body having a slope at which a rear end of the rocker slider is slid.

A first pin inserted into a first pin insertion portion protruding from the locker body and formed in any one of the pair of shutters; And a second pin protruding from the locker body and inserted into a second pin insertion portion formed in the other one of the pair of shutters.

The barrier body may have a long cut-out groove on the rear surface thereof.

According to the embodiment of the present invention, the shutter is pushed by the MCC unit to open the clip through-hole, and the shutter is advantageously operated with high reliability.

Further, the shutter and the barrier body can function as finger protrusions that block the front of the bus bar and prevent the hand from being infiltrated by the bus bar, thus providing a high safety advantage.

In addition, the pair of shutters can be rotated while the clip through-holes are divided and opened, so that space utilization can be increased as compared with a case where one shutter having a large size is rotated to open and close the clip through- There is an advantage that the center can be made compact.

When the clip is pulled out to the front of the clip through hole, the pair of shutters is automatically returned to the position where the clip through hole is blocked by the first spring and the second spring, so that when at least one of the pair of shutters malfunctions There is an advantage that the foreign matter can be minimized.

In addition, since one locker can lock both of the pair of shutters, the number of parts can be minimized, and the structure is simple.

In addition, there is an advantage that the barrier body can be shared by the cut groove.

1 is a perspective view of a motor control center according to an embodiment of the present invention,
2 is a perspective view showing an MCC unit of a motor control center according to an embodiment of the present invention,
3 is an enlarged sectional view of a state where a clip installed on an MCC unit of a motor control center according to an embodiment of the present invention is connected to a bus line,
Fig. 4 is a front view of the barrier assembly shown in Fig. 1 when the shutter is locked;
FIG. 5 is a rear view of the barrier assembly shown in FIG. 1 when the shutter is locked;
6 is a front view of the barrier assembly shown in Fig. 1 when the shutter is unlocked by the motor control unit, Fig.
FIG. 7 is a rear view of the barrier assembly shown in FIG. 1 when the shutter is unlocked by the motor control unit;
8 is a perspective view when the shutter of the barrier assembly shown in Fig. 1 is unlocked by the motor control unit, Fig.
Fig. 9 is a perspective view of the locker shown in Fig. 8 in an enlarged scale,
10 is a sectional view of the barrier assembly shown in Fig. 1 when the shutter is locked, Fig.
Fig. 11 is a sectional view of the barrier assembly shown in Fig. 1 when the shutter is unlocked. Fig.

Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a side view showing the inside of a motor control center according to an embodiment of the present invention, FIG. 2 is a perspective view showing an MCC unit of a motor control center according to an embodiment of the present invention, and FIG. Fig. 5 is an enlarged cross-sectional view of a state in which a clip provided on the MCC unit of the motor control center according to the example is connected to the busbar.

The motor control center includes a cabinet 1, a bus bar 2, an MCC unit 3 and a barrier assembly 4.

The cabinet 1 can form the appearance of a motor control center. The cabinet 1 may have a space S in which a bus bar 2, an MCC unit 3 and a barrier assembly 4 can be accommodated. The cabinet 1 can be opened on one side. The MCC unit 3 can be moved in and out through an open side of the cabinet 1. [

The cabinet 1 includes a base 11, a pair of side bodies 12 and a rear body 13 disposed on the base 11, a pair of side bodies 12 and rear bodies 13 And a top cover 14 disposed on the top.

A door 15 for opening and closing the space S may be connected to the cabinet 1 in a rotatable manner. The door 15 may be provided by dividing the space S into a plurality of openings.

In the cabinet 1, a partition plate 16 for vertically partitioning the space S may be disposed. A plurality of partition plates 16 may be provided inside the cabinet 1 and a plurality of partition plates 16 may be vertically spaced in the space S. The rear end of the partition plate 16 may be spaced apart from the rear body 13 and a gap may be formed between the rear end of the partition plate 16 and the rear body 13. [ The partition plate 16 can be installed so that its rear end does not come in contact with the bus bar 2.

The busbars 2 may be arranged vertically in the cabinet 1. The bus bar 2 can be disposed closer to the rear body 13 of the door 15 and the rear body 13. The bus bar 2 may be disposed to be located in the inner front of the cabinet 1 and the inner rear middle of the inner rear.

The bus bar 2 may be connected to the MCC unit 3. [ The bus bar 2 can be installed to be fixed to the cabinet 1 and the MCC unit 3 can be moved toward the bus bar 2 from the front of the bus bar 2 and connected to the bus bar 2. [ The bus bar 2 may be a vertical bus bar which is arranged long in the vertical direction in the space S. A plurality of bus bars (2) may be provided in the space (S). The plurality of bus bars 2 may be disposed in the cabinet 1 so as to be spaced apart from each other in the left-right direction. Each of the plurality of bus bars 2 can be connected to the MCC unit 3. [

The MCC unit 3 may be a motor control unit for controlling the rotation of the motor by selectively supplying power to the motor or switching the supply direction of the power.

The MCC unit 3 can be lifted up to the partition plate 16. The motor control center may be provided with a plurality of MCC units 3 in the cabinet 1.

A part of the plurality of MCC units 3 may be inserted and disposed between a pair of partition plates 16 positioned so as to be vertically spaced apart. The MCC unit located at the uppermost one of the plurality of MCC units 3 may be inserted between the partition plate 16 located at the uppermost one of the plurality of partition plates 16 and the top cover 14. [ The MCC unit located at the lowermost one of the plurality of MCC units 3 can be inserted and disposed between the base 11 and the partition plate 16 located at the lowest one of the plurality of partition plates 16. [

Hereinafter, for convenience of explanation, one MCC unit 3 will be described as an example.

The MCC unit 3 may include a breaker 31 for blocking an electric circuit and a drawer 32 for installing a breaker 31.

The circuit breaker 31 may be a molded case circuit breaker (MCCB).

The drawer 32 may have a shape in which a front surface, an upper surface and a rear surface are opened. The drawer 32 may have a shape in which the bottom surface and both the left and right side surfaces are clogged. The drawer 32 may include a lower plate 33 and a pair of side plates 34a and 34b mounted on the lower plate 33. [

The MCC unit 3 may include a front door 35 for opening and closing the front surface of the drawer 32. The front door 35 can be connected to be rotated around one side of the left and right sides of the drawer 32.

The MCC unit 3 may further include a display assembly 36 installed in the drawer 32. The display assembly 36 may include at least one lamp that displays operational information of the MCC unit 3.

The MCC unit 3 may include a clip 37 connected to the bus bar 2. [ The clip 37 may include a clip member 38 connected to the bus bar 2 and a clip case 39 surrounding the outer periphery of the clip member 38 as shown in Fig. The clip 37 may be installed so as to be located on the inner rear side of the drawer 32.

The MCC unit 3 is put on the partition plate 16 and moved in the direction in which the bus bar 2 faces so that the clip 37 can be connected to the bus bar 2. [ The MCC unit 3 can be connected to the bus bar 2 through the clip through hole formed in the barrier assembly 4 by the clip 37. [

The barrier assembly 4 may be installed in front of the bus bar 2. A plurality of barrier assemblies 4 may be provided in front of the bus bars 2. [ The barrier assembly 4 may be a finger protector that prevents the hand of the operator or the like from touching the bus bar 2. [

The barrier assembly 4 may be configured such that the MCC unit 3 can be connected to or disconnected from the bus bar 2. [ The barrier assembly 4 may be provided with a clip through hole 41 through which the clip provided in the MCC unit 3 passes through the barrier assembly 4. [ The barrier assembly 4 may include a shutter 50 (see FIG. 3) for opening and closing the clip through-hole 41.

FIG. 4 is a front view of the barrier assembly shown in FIG. 1 when the shutter is locked, FIG. 5 is a rear view of the barrier assembly shown in FIG. 1 when the shutter is locked, 7 is a rear view of the shutter of the barrier assembly shown in Fig. 1 when the shutter is unlocked by the motor control unit, Fig. 8 is a front view of the shutter of the assembly when the shutter of the assembly is unlocked by the motor control unit, Fig. 9 is a perspective view of the locker shown in Fig. 8 in an enlarged view. Fig. 9 is a perspective view of the locker shown in Fig. 8 when the shutter of the illustrated barrier assembly is unlocked by the motor control unit.

The barrier assembly 4 includes a barrier body 40, a shutter 50, and a locker 60.

The barrier body 40 may be a vertical barrier disposed vertically within the cabinet 1. [ The barrier body 40 may be arranged long in the lateral direction. The barrier body 40 can be seen through the space S in front of the motor control center when the door 15 is opened and the MCC unit 3 is taken out to the outside.

A through hole (41) through which the clip (37) passes may be formed in the barrier body (40). The clip through-hole 41 may be formed in a rectangular shape elongated in the left-right direction. The clip through hole 41 may be formed in the barrier body 40 so as to open in the front-rear direction.

The barrier body 40 may have a long cut-out groove 46 formed in the rear surface thereof. The cut grooves 46 may be elongated in the longitudinal direction of the barrier body 40. The cutting grooves 46 may be formed long in the lateral direction of the barrier body 40. The cutting groove 46 may be formed to be spaced apart from the clip through hole 41 of the barrier body 40. The cutting groove 46 may be formed on the upper side of the clip through hole 41 or on the lower side. The barrier body 40 can be commonly used irrespective of the size or model type of the motor control center and can be selectively installed by dividing the barrier body 40 into two by the cutting groove 46. [

The shutter 50 is rotatably installed in the barrier body 40 to open and close the clip through-hole 41. The shutter 50 may include a plurality of shutters that divide and open the clip through-hole 41. Each of the plurality of shutters may be rotatably installed in the barrier body 40. The shutter 50 may include a pair of shutters 52 and 53. It is preferable that the pair of shutters 52 and 53 are installed so as to rotate in opposite directions to each other. The pair of shutters 52 and 53 can be separated from each other and can open the clip through hole 41 and can close the clip through hole 41 while being close to each other.

One of the pair of shutters 52 and 53 may be an upper shutter 52 positioned on the upper side and the other one of the pair of shutters 52 and 53 may be a lower shutter 52 positioned on the lower side of the upper shutter 52. [ It may be a shutter 53.

The pair of shutters 52 and 53 may be a left shutter positioned on the left side and a right side shutter positioned on the right side of the left shutter.

The pair of shutters 52 and 53 are preferably configured to minimize the rotational locus thereof. When the clip through-hole 41 is formed long in the left-right direction, the pair of shutters 52 and 53 can minimize the rotation locus when the upper shutter 52 and the lower shutter 53 are constituted.

The locker 60 may be disposed on the barrier body 40 such that the locker 60 is slid to the first position P1 for locking the shutter 50 and the second position P2 for unlocking the shutter 50. [

The locker 60 may include a pin that is inserted into the shutter 50 to restrain the shutter 50 and separate from the shutter 50 to release the shutter 50. [

When the shutter 50 is one shutter, the locker 60 may include one pin for restraining and releasing one shutter.

When the shutter 50 is a plurality of shutters, the locker 60 may include a plurality of pins. If the number of shutters is N, the number of the pins may be N in one locker, and the number of the lockers, the number of the shutters, and the number of the pins may be 1: N: N.

The MCC unit 3 may be provided with a rocker slider 70 for sliding the rocker 60. The locker slider 70 can be retracted by the MCC unit 3 to slide the locker 60 to the second position P2.

The locker slider 70 can be arranged long in the front-rear direction. The rocker slide 70 can be disposed in the forward and backward direction in front of the locker 60 and can be moved backward together with the MCC unit 3 when the MCC unit 3 is moved in the rearward direction. The locker slider 70 may be disposed adjacent to the clip 37 and may be moved back and forth together with the clip 37.

The barrier assembly 4 may further include a locker spring 80 that elastically supports the locker 60 in the first position P1. The barrier assembly 4 may further include a rocker spring supporter 90 mounted on the barrier body 40 and supporting the locker spring 80. [

The barrier body 40 may be formed with a locker guide portion 42 in which at least a portion of the locker 60 is inserted and accommodated and the locker 60 is slidably guided. The locker guide portion 42 may be formed to protrude rearward on one side of the right and left sides of the clip through-hole 41.

Hereinafter, the pair of shutters 52 and 53 will be described as being composed of the upper shutter 52 and the lower shutter 53. [

The barrier assembly 4 may include a first rotation axis A1 and a first spring S1.

The first rotary shaft A1 is disposed on the barrier body 40 and can support any one of the pair of shutters 52 and 53 in a rotatable manner. The first rotation axis A1 can be inserted into the first rotation axis insertion portion 57 of the upper shutter 52, which will be described later. The first rotation axis A1 may be a long horizontal rotation axis in the horizontal direction.

The first spring S1 can elastically support the first rotation axis A1 so that any one of the pair of shutters 52 and 53 is rotated to the position where the clip through hole 41 is closed . The first spring S1 may be a torsion spring arranged to surround the first rotation axis A1.

The barrier assembly 4 may include a second rotation axis A2 and a second spring S2.

The second rotary shaft A2 is disposed on the barrier body 40 and rotatably supports the other one of the pair of shutters 52 and 53. [ The second rotation axis A2 can be inserted into the second rotation axis insertion portion 58 of the lower shutter 53, which will be described later. The second rotation axis A2 may be a long horizontal rotation axis in the horizontal direction.

The second spring S2 can elastically support the second rotation axis A2 so that the other one 53 of the pair of shutters is rotated to a position where the clip through hole 41 is closed. The second spring S2 may be a torsion spring disposed to surround the second rotation axis A2.

On the rear surface of the barrier body 40 is provided a first rotation axis support portion 43 rotatably supported by the first rotation axis A1 and a second rotation axis support portion 44 rotatably supporting the second rotation axis A1, Can be formed.

The upper shutter 52 may be formed with a first pin insertion portion 56 into which the first pin 63 is inserted. The upper shutter 52 may be formed with a first rotation axis inserting portion 57 into which the first rotation axis A1 is inserted.

The lower shutter 53 may be formed with a second pin insertion portion 58 into which the second pin 64 is inserted. The lower shutter 53 may be formed with a second rotary shaft inserting portion 59 into which the second rotary shaft A2 is inserted.

The first rotation axis A1 may be fixed to the first rotation axis insertion portion 57 and may be rotatably supported by the first rotation axis support portion 43. [

The first spring S1 can be engaged with a groove or a protrusion formed on one side of the first rotary shaft support portion 43 and the other side can be engaged with a groove formed on one of the first rotary shaft A1 and the first rotary shaft insertion portion 57 It can get caught in protrusion. The first spring S1 can be elastically deformed when the upper shutter 52 is rotated backward. The first spring S1 is elastically restored when an external force acting on the upper shutter 52 is removed so that the upper shutter 52 is rotated in the closing direction of the clip through hole 41 by the first rotation axis A1, (57).

The second rotation axis A2 can be fixed to the second rotation axis insertion portion 59 and can be rotatably supported on the second rotation axis support portion 44. [

The second spring S2 can be engaged with a groove or a projection formed on the second rotary shaft support portion 44 and the other side can be engaged with a groove portion formed in any one of the first rotary shaft A2 and the second rotary shaft insertion portion 59 It can get caught in protrusion. The second spring S2 can be elastically deformed when the lower shutter 53 is rotated backward. When the external force acting on the SMS lower shutter 53 is removed, the lower spring S2 is elastically restored and the lower shaft S2 is rotated in the direction of closing the clip through hole 41, (59) can be rotated.

The locker 60 may include a locker body 61. The locker body 61 may be provided with a sphere portion 62 through which the rear end of the rocker slider 70 slides.

The locker 60 includes a first pin 63 protruding from the locker body 61 and inserted into the first pin insertion portion 56 formed in one of the pair of shutters 52, and; And a second pin 64 protruding from the locker body 61 and inserted in a second pin insertion portion 58 formed in the other one of the pair of shutters 52 and 53 have.

The locker 60 can be positioned in the locker guide portion 42 and the portion other than the bulge portion 62 can be accommodated inside the locker guide portion 42. [

The first pin 63 and the second pin 64 may be arranged long in the left and right direction inside the locker guide portion 42. The first pin 63 and the second pin 64 can escape from the shutters 52 and 53 when the ball bearings 62 are pushed laterally by the rocker slide 70. [ The first pin 63 and the second pin 64 can be moved by the locker spring 80 in the direction opposite to the locker spring supporter 90 with the shutter 52 So that the shutters 52 and 53 can be locked.

The first pin 63 includes a first locking protrusion portion which is inserted and confined in the first pin insertion portion 56 of the upper shutter 52 and a second locking protrusion portion which protrudes in the locker body 61 in the direction opposite to the first locking protrusion portion And a first locker spring holder portion for preventing any deviation of the first rocker spring.

The second pin 64 has a second locking protrusion which is inserted and constrained in the second pin insertion portion 58 of the lower shutter 53 and a second locking protrusion which protrudes in the locker body 61 in the direction opposite to the second locking protrusion And a second locker spring holder portion for preventing any deviation of the second rocker spring.

The locker slider 70 may be provided to be positioned next to the clip 37, as shown in Fig. The locker slider 70 can be formed integrally with the clip 37. [ The locker slider 70 can be constituted by a member separate from the clip 37. [

The locker slide 70 may include a clip contact portion 71 that contacts the pressing portion 37a protruding from the side surface of the clip 37 and an operation protrusion 72 that protrudes backward from the clip contact portion 71 have.

The locker spring 80 may be in contact with the side surface of the locker body 61 at one end and the locker spring supporter 90 at the other end. The rocker spring (80) sideways? Coil spring. The locker spring 80 can be compressed when the locker body 61 is moved close to the rocker spring cephalic portal 90 and the locker body 61 can be compressed by the locker body 61 when the external force acting on the locker body 61 is removed, The locker body 61 can be pushed away from the spring supporter 90.

It is needless to say that a plurality of the locker springs 80 may be provided between the locker body 61 and the locker spring spider 90, or a plurality of the locker springs 80 may be provided. When a plurality of locker springs 80 are provided, the locker spring 80 includes a first locker spring surrounding a portion of the first pin 63 and a second locker spring surrounding a portion of the second pin 64 .

The first rocker spring can be disposed between the locker body 61 and the rocker spring supporter 90 so as to surround the first locker spring holder portion of the first pin 63 and can be compressed and tensioned therebetween. The second rocker spring can be disposed between the locker body 61 and the rocker spring supporter 90 so as to surround the second locker spring holder portion of the second pin 64 and can be compressed and tensioned therebetween .

The locker spring supporter 90 may be inserted into the locker guide portion 42 and installed therein. The hook 91 may be formed on one of the locker spring supporter 90 and the locker guide portion 42 and the hook hole 43a may be formed on the other of the locker spring supporter 90 and the locker guide portion 42,

The rocker spring supporter 90 may be disposed on the side of the clip through hole 41 so as to be spaced apart from the clip through hole 41 so that the locker spring 70 is elastically restored in the direction in which the clip through hole 41 is located And can support the rocker spring 70.

FIG. 10 is a cross-sectional view of the barrier assembly shown in FIG. 1 when the shutter is locked, and FIG. 11 is a sectional view of the barrier assembly shown in FIG. 1 when the shutter is unlocked.

The operation protrusion 72 of the locker slide 70 may be formed with a sharp rear end. The operation protrusions 72 may be formed in a triangular shape at the rear end.

The rear ends of the operation protrusions 72 may have a pair of gradient stages 73 and 74 which are bent in opposite directions to each other. Any one of the pair of gradient stages 73 and 74 can be brought into contact with the front surface of the bulge portion 62 of the locker 60 and can slide on the bulge portion 62 of the locker 60. [

Hereinafter, the operation of the present invention will be described.

First, when mounting the MCC unit 3 to the motor control center, the operator can lift the MCC unit 3 to the partition plate 16 and slide it toward the rear where the bus bar 2 is located.

The MCC unit 3 can be positioned such that the clip 37 can be positioned proximate to the bus bar 2 and retracted toward the bus bar 2 at the front of the bus bar 2, To the rocker 60 in the forward direction.

The rear end of the operating projection 72 of the locker slide 70 can be brought into contact with the bulge portion 62 of the locker 60 and the rear end portion of the locker 60 62 and can push the bulb portion 62 of the locker 60 in the direction away from the shutter through-hole 41. [ .

The locker 60 can be slid away from the shutter through hole 41 by the external force applied by the locker slide 70 as described above and guided by the locker guide portion 42 of the barrier body 40 And can be slid in the lateral direction.

When the locker 60 is moved as described above, the first pin 63 can escape from the first pin inserting portion 56 and the second pin 64 can escape from the second pin inserting portion 58 have. The upper shutter 52 can be unlocked in the locker 60 when the first pin 63 comes out of the first pin insertion portion 56. [ Then, when the second pin 64 comes out of the second pin insertion portion 58, the lower shutter 53 can be unlocked by the locker 60.

The upper shutter 52 can be rotated about the first rotation axis A1 and the lower shutter 53 can be rotated about the second rotation axis A2.

The rear end of the clip 37 can be brought into contact with the upper shutter 52 and the lower shutter 53 and the upper shutter 52 and the lower shutter 53 can be moved Can be moved toward the bus bar (2) while rotating the bus bar (53).

The upper shutter 52 and the lower shutter 53 can be rotated in the backward direction while being rotated in opposite directions when the clip 37 is moved as described above. When the upper shutter 52 and the lower shutter 53 are rotated as described above, the clip through hole 41 of the barrier body 40 can be opened, and the clip 37 can be separated from the upper shutter 52 and the lower shutter 53 to the bus bar 2 and connected to the bus bar 2. [

When the MCC unit 3 is mounted as described above, the rocker spring 80 can be supported by the rocker spring supporter 90 in a compressed state, and the first spring S1 is elastically deformed, And the second spring S2 can support the second rotation axis A2 in the elastically deformed state.

On the other hand, the MCC unit 3 can be detached from the motor control center for servicing for maintenance, in which an operator can pull the MCC unit 3 forward of the bus bar 2.

When the MCC unit 3 is pulled forward of the bus bar 2, the clip 37 can be separated from the bus bar 2 and passed through the clip through hole 41 to the front of the clip through hole 41 You can escape.

When the clip 37 is separated, the first spring S1 is elastically restored to rotate the first rotation axis A1 in a reverse direction, and the second spring S2 is elastically restored to the second rotation axis A2. Can be reversed.

The upper shutter 52 is rotated to a position where it closes the upper side area of the clip through hole 41 and the lower shutter 53 is rotated in the reverse direction of the first rotation axis A1 and the second rotation axis A2, And the upper shutter 52 and the lower shutter 53 can block the clip through hole 41 together. The first pin insertion portion 56 of the upper shutter 52 can be positioned next to the first pin 63 and the second pin insertion portion 58 of the lower shutter 53 can be positioned at the second pin 64). &Lt; / RTI >

The locker slide 70 can be moved forward together with the MCC unit 3 when the MCC unit 3 is pulled out as described above and the operation protrusion 72 is slid forwardly of the barrier body 40 Can come out.

When the locker slide 70 is moved, the locker spring 80 can be resiliently restored in a compressed state to push out the locker 60, and the locker 60 can be retracted in the direction of approaching the clip through- Can be slid.

The first pin 63 of the locker 60 can be inserted into the first pin insertion portion 56 of the upper shutter 52 to restrain the upper shutter 52 and the second pin 64 Can be inserted into the second pin insertion portion 58 of the lower shutter 53 to restrain the lower shutter 53.

The upper shutter 52 and the lower shutter 53 can be restrained by a single locker 60 and the upper shutter 52 and the lower shutter 53 are in a state in which any rotation thereof is restricted.

The description above is merely illustrative of the technical idea of the present invention, and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention.

Therefore, the embodiments disclosed in this specification are intended to illustrate rather than limit the technical idea of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments.

The scope of protection of the present invention should be construed according to the following claims, and all technical ideas which are within the scope of the same should be interpreted as being included in the scope of the present invention.

1: Cabinet 2: Mothership
3: MCC unit 4: barrier assembly
40: Barrier body 41: Clip through hole
46: Cutting groove 42: Locker guide section
50: Shutter 52: Upper shutter
53: Lower shutter 60: Rocker
62: first pin 64: second pin
70: rocker slider 80: rocker spring
90: Rocker spring supporter A1: First rotary shaft
S1: first spring A2: second rotation axis
S2: second spring P1: first position
P2: 2nd position

Claims

A cabinet;
A bus bar disposed inside the cabinet;
A barrier assembly disposed in front of the bus bar;
And an MCC unit having a clip connected to said busbar,
The barrier assembly
A barrier body having a clip through hole through which the clip passes;
A shutter rotatably installed on the barrier body and opening and closing the clip through hole;
And a locker disposed on the barrier body to slide to a first position for locking the shutter and a second position for unlocking the shutter,
The MCC unit having a rocker slider retracted by the MCC unit to slide the rocker to a second position.

The method according to claim 1,
And a locker spring for elastically supporting the locker to the first position.

3. The method of claim 2,
And a rocker spring supporter mounted on the barrier body and supporting the rocker spring.

The method according to claim 1,
Wherein the barrier body has a locker guide portion in which at least a portion of the locker is inserted and accommodated, and the locker is slidably guided.

5. The method of claim 4,
Wherein the locker guide portion protrudes rearward on one side of the right and left sides of the clip through-hole.

The method according to claim 1,
And the shutter includes a pair of shutters that divide and open the clip through-hole.

The method according to claim 6,
A first rotation shaft disposed on the barrier body and rotatably supporting any one of the pair of shutters,
A first spring for elastically supporting the first rotation axis so that any one of the pair of shutters is rotated to a position where the clip through hole is blocked;
A second rotating shaft disposed on the barrier body and rotatably supporting the other one of the pair of shutters,
And a second spring elastically supporting the second rotation shaft so that the other one of the pair of shutters is rotated to a position where the clip through-hole is blocked.

8. The method of claim 7,
On the rear surface of the barrier body
A first rotating shaft support portion rotatably supported by the first rotation shaft,
And a second rotation shaft support portion for rotatably supporting the second rotation shaft.

The method according to claim 6,
Wherein the rocker includes a rocker body having a gradient portion on which a rear end of the rocker slider is slid.

10. The method of claim 9,
A first pin inserted into a first pin insertion portion protruding from the locker body and formed in any one of the pair of shutters;
And a second pin protruding from the locker body and inserted into a second pin insertion portion formed in the other one of the pair of shutters.

The method according to claim 1,
Wherein the barrier body is formed with a long cutting groove on the rear surface thereof.