KR101415776B1

KR101415776B1 - Circuit breaker

Info

Publication number: KR101415776B1
Application number: KR1020100051344A
Authority: KR
Inventors: 박종덕
Original assignee: 엘에스산전 주식회사
Priority date: 2010-05-31
Filing date: 2010-05-31
Publication date: 2014-07-08
Also published as: KR20110131753A

Abstract

The present invention relates to a circuit breaker. According to the present invention, the first energizing portion of the cradle-side terminal provided in the cradle and the second energizing portion of the main body-side terminal provided in the breaker main body are configured to be detachable in the moving direction of the breaker main body, It is not necessary to provide a separate space for energizing or disconnecting the side terminal, so that the height of the circuit breaker can be reduced and the circuit breaker can be miniaturized.

Description

Circuit breaker {CIRCUIT BREAKER}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a circuit breaker, and more particularly, to a circuit breaker which is detachable in a pull-out direction of the breaker.

Generally, circuit breakers can be broadly divided into fixed type breakers and pull-out type breakers. The fixed breaker is a method in which the position of the fixed breaker is fixed in the panel of the switchboard only by the main body of the circuit breaker, and the pull-out circuit breaker has an enclosure called a CRADLE for easy maintenance of the circuit breaker.

The drawer-type breaker is housed in a cradle and housed in a switchboard for inserting and managing various electric devices including a breaker for operation of the power plant, substation, etc. or for operation of the electric motor or the like. The circuit breaker includes a circuit breaker body having a bus terminal and a load terminal connected to a bus terminal and a load terminal of the cradle and supplied with a voltage and a current, A test position in which the breaker is disconnected from the terminals of the cradle so as to test only the operation of the breaker and a disconnect position in which the control power connector of the breaker main body is separated from the control power plug of the switchboard to prepare for testing .

A cradle-side control terminal (hereinafter abbreviated as a cradle-side terminal) is provided on the cradle so that the breaker can be turned on / off at an operation position or a test position of the breaker main body. (Hereinafter referred to as " main body side terminal ") that can be connected to or disconnected from the terminal.

FIG. 1 is a perspective view of a conventional circuit breaker, and FIG. 2 is an enlarged perspective view of a control terminal connection device of the circuit breaker of FIG.

As shown in the drawings, the conventional circuit breaker has a structure in which the cradle-side terminal 10 is provided on the upper side of the cradle 1 so as to be movable in the direction perpendicular to the moving direction of the circuit breaker body 2, The main body side terminal 20 is fixedly coupled to the main body 2. A side surface of the cradle 1 is provided with a control terminal moving part (not shown) for automatically moving the cradle side terminal 10 up and down along the pull-out direction of the breaker main body 2.

The cradle side terminal 10 is provided with a first conductive part 111 and a second conductive part 11 on the lower surface thereof and the first conductive part 111 and the second conductive part 11 are inserted into the upper surface of the main body side terminal 20, And a second conductive portion 21 for electrically connecting the first conductive portion 21 and the second conductive portion 21 are provided upward.

In the conventional circuit breaker, when the breaker main body 2 is drawn into the test position or the operation position of the cradle 1 by the user, the control terminal moving unit operates to move the cradle side terminal 10 downward Side terminal 20 of the circuit breaker main body 2. As shown in Fig.

The first power transmission unit 111 of the cradle side terminal 10 is inserted into the second power transmission unit 21 of the main body side terminal 20 so that the cradle side terminal 10 and the main side terminal 20 are electrically connected.

When the breaker main body 2 is pulled out, the cradle side terminal 10 is moved upward by the control terminal moving part to be separated from the main body side terminal 20, 2 are electrically disconnected.

However, in the conventional circuit breaker, the cradle-side terminal 10 and the body-side terminal 20 are formed so as to be detachable in the vertical direction, that is, in a direction perpendicular to the moving direction of the circuit breaker body 2, The height of the cradle 1 must be increased so that the terminal 10 can be moved in the vertical direction. As a result, the size of the circuit breaker is increased and the cradle 1 can not be properly stored in the miniaturized switchboard.

It is an object of the present invention to provide a circuit breaker in which the cradle and the control terminal of the circuit breaker main body are laterally connected to make the circuit breaker compact.

In order to accomplish the object of the present invention, a cradle-side terminal provided in an enclosure cradle; And a main body side terminal provided on the breaker main body housed in the cradle and selectively attached to and detached from the cradle side terminal, wherein the cradle side terminal and the main body side terminal are detachably provided in a moving direction of the breaker main body do.

Here, the cradle-side terminal is provided with a first energizing portion electrically connected to the body-side terminal, the first energizing portion is provided on a surface corresponding to the moving direction of the breaker body, A second energizing portion selectively attached to and detached from the first energizing portion may be provided, and the second energizing portion may be provided on a surface facing the first energizing portion.

One of the first and second power supply units is configured to be movable in the direction of movement of the circuit breaker main body according to the position of the circuit breaker main body while the other is configured to be fixed .

The cradle-side terminal may include: a fixing plate fixedly coupled to the cradle; And a cradle-side housing coupled to the fixed plate and having the first energizing portion fixedly coupled to the moving direction of the circuit breaker body.

The main body side terminal includes: a terminal box fixedly coupled to the breaker body; A main body housing movably coupled to the terminal box and having the second energizing unit; An elastic member coupled at both ends to the terminal box and the main body side housing to elastically support the main body side housing with respect to the terminal box; And a terminal stopper rotatably coupled to the main body housing and supporting the main body housing to selectively move according to the position of the breaker main body.

Here, the terminal box may be formed with a stopper supporting portion having a predetermined height to support the terminal stopper.

The circuit breaker according to the present invention is configured such that the first power supply portion of the cradle side terminal provided in the cradle and the second power supply portion of the main body side terminal provided in the circuit breaker main body are detachable in the moving direction of the circuit breaker body, It is not necessary to provide a separate space for the cradle-side terminal and the main body-side terminal to be energized or disconnected, so that the height of the circuit breaker can be reduced and the circuit breaker can be miniaturized.

1 is a perspective view of a conventional circuit breaker,
FIG. 2 is an enlarged perspective view of a control terminal connection device of the circuit breaker according to FIG. 1;
FIG. 3 is a perspective view of a circuit breaker having a control terminal connection device according to the present invention,
4 and 5 are exploded perspective views of the control terminal connection device of FIG. 3,
FIG. 6 is a perspective view showing a terminal stopper in the control terminal connecting device according to FIG. 3,
FIG. 7 and FIG. 8 are longitudinal sectional views showing the test position and the operation position of the control terminal connection apparatus shown in FIG. 3;

Hereinafter, a circuit breaker according to the present invention will be described in detail with reference to an embodiment shown in the accompanying drawings.

FIG. 3 is a perspective view in which a circuit breaker having a control terminal connection device according to the present invention is exploded. FIGS. 4 and 5 are perspective views of the control terminal connection device shown in FIG. In which the terminal stopper is shown in the control terminal connecting device.

3 and 4, the circuit breaker according to the present invention includes a cradle 100 fixed to the switchboard, and a circuit breaker main body 200 accommodated in the cradle 100 so as to be movable back and forth.

The cradle 100 is provided with a cradle-side terminal 110 for supplying power so that the circuit breaker can be turned on and off according to the position of the breaker main body 200 A main body side terminal 210 to which the cradle side terminal 110 is selectively connected is provided.

3 to 5, the cradle-side terminal 110 and the body-side terminal 210 are connected to the first power supply unit 111 (described later) so that the cradle-side terminal 110 and the main body- And the second power supply unit 211 are provided so as to correspond to the moving direction of the circuit breaker body 200, respectively.

The cradle side terminal 110 includes a fixed plate 115 fixedly coupled to both sides of the cradle 100 and a cradle housing 110 coupled to the fixed plate 115, (116).

The cradle-side housing 216 and the cradle-side housing 116 are fixedly coupled to a central portion of the fixing plate 115 so that both ends of the fixing plate 115 are fixed to both sides of the cradle 100 .

The cradle-side housings 216 and 116 have a first conductive part 111 having a predetermined height on one side thereof, that is, on one side in the longitudinal direction corresponding to the moving direction of the circuit breaker body 200, I.e., in the forward and backward directions.

The first power transmission unit 111 may be formed with a locking protrusion 112 so that the first power transmission unit 111 is caught by the cradle side housings 216 and 116 to be restrained in the front and rear direction.

The terminals of the circuit breaker main body 200 are connected to the cradle-side housings 216 (116) on both sides in the front-rear direction, that is, on both sides of the first power- The pushing protrusion 113 for pressing the stopper 218 to release the constraint is formed. The pushing protrusion 113 is formed lower than the height of the first conductive part 111.

3 to 5, the main body side terminal 210 includes a terminal box 215 fixedly coupled to the breaker main body 200, a second terminal box 215 movably coupled within the terminal box 215, The terminal box 215 is connected to both ends of the main body housing 216 so that the main body housing 216 contacts the terminal box 215 with elasticity A terminal stopper 218 rotatably coupled to the main body housing 216 and supporting the main body housing 216 to selectively move according to the position of the breaker main body .

The terminal box 215 is formed in a box shape with one lateral side opened, and is fixedly coupled to the upper surface of the breaker main body 200. Inside the terminal box 215, the elastic members 217 are arranged on both sides in the vertical direction, and the first ends of the elastic members 217 are fixedly coupled. A stopper supporting portion 219 for supporting the terminal stopper 218 is formed in the terminal box 215 at a predetermined height.

The main body side housing 216 is formed in a box shape such that the same surface as the opening surface of the terminal box 215 is opened. The lateral height of the main body side housing 216 is set such that the main body side housing 216, Rear direction of the terminal box 215 so that the terminal box 215 can move in the forward and backward directions. The terminal stopper 218 is hinged to both sides of the main body housing 216 so as to be rotatable and the second end of the elastic member 217 is fixedly coupled to both upper and lower sides of the terminal stopper 218 . The second power feeder 211 is inserted and coupled to the opening surface of the main body side housing 216.

The elastic member 217 is composed of a tension coil spring which is fixedly coupled to both the terminal box 215 and the main body housing 216 to generate a tensile force. However, other elastic members such as tension springs having the same elastic force may be provided in addition to the tension coil spring.

6, the terminal stopper 218 is formed with a hinge portion 218a so as to be rotatably coupled to the main body housing 216. One end of the hinge portion 218a is connected to the second conductive portion 211 So that the other end of the hinge portion 218a, that is, the other end opposite to the pressing portion 218b, is selectively supported on the stopper supporting portion 219 of the terminal box 215 A support portion 218c is formed.

In the drawing, reference numeral 300 denotes an inlet / outlet handle for moving the breaker main body.

The above-described circuit breaker according to the present invention has the following operational effects.

7, the worker moves the breaker main body 200 to the cradle 100 using the handle 300 to allow the breaker main body 200 to reach the test position. The first conductive part 111 of the cradle side terminal 110 provided on the cradle 100 is electrically connected to the second conductive part 211 of the body side terminal 210 provided in the breaker main body 200, Is inserted to conduct a test operation. At this time, the terminal stopper 218 provided on the main body side terminal 210 maintains a state of being restrained by the stopper supporting portion 219 provided on the main body side terminal 210, so that the main body side housing 216 The first conduction unit 111 is inserted into the second conduction unit 211 and electrically connected to the terminal box 215 by preventing the first conduction unit 111 from moving.

8, when the worker moves the breaker main body 200 to the operation position by further rotating the pull-out handle 300, the pusher protrusion 113 provided on the cradle side terminal 110 The pushing portion 218b of the terminal stopper 218 provided on the main body side terminal 210 is pushed so that the support portion 218c of the terminal stopper 218 rotates about the hinge portion 218a, 219). The main body side housing 216 of the main body side terminal 210 slides relative to the terminal box 215 and can move to the rear side, that is, the inside of the terminal box 215, Position. At this time, the elastic member 217 provided on the main body side terminal 210 accumulates restoring force while being stretched.

When the worker completely disconnects the breaker main body 200 from the cradle 100, the first conductive part 211 provided on the main body side terminal 210 and the first conductive part 211 provided on the cradle side terminal 110, The conductive part 111 is drawn out. At the same time, as shown in FIG. 7, the main body side housing 216 slides on the terminal box 215 due to the restoring force of the elastic member 217 provided on the main body side terminal 210, The terminal stopper 218 rotates in the reverse direction and returns to the state where the terminal stopper 218 is restrained by the stopper supporting portion 219. In this case, when the detent protrusion 215a is formed on the front surface of the terminal box 215, it is possible to mechanically limit the return of the main body housing 216 in addition to the elastic force of the elastic member 217, The reliability can be enhanced.

Meanwhile, although not shown in the drawing, the first blocking portion may be provided so as to be movable in the front-rear direction, while the second blocking portion may be fixedly fixed in the front-rear direction. Also in this case, other members for allowing the first blocking portion and the second blocking portion to perform relative movement can be configured in the same manner as in the above-described embodiment.

The cradle-side terminal and the main body-side terminal provided in the breaker main body can be attached and detached in the moving direction of the breaker main body, There is no need to provide a separate space for the terminals to be energized or disconnected, so that the height of the circuit breaker can be reduced and the circuit breaker can be downsized.

100: Cradle 110: Cradle side terminal
111: first communicator 115: fixed plate
116: cradle-side housing 200: breaker body
210: main body side terminal 211: second current-
215: terminal box 216: housing on the main body
217: elastic member 218: terminal stopper
219: Stopper support

Claims

A cradle-side terminal provided on the cradle forming the enclosure; And
And a main body side terminal provided on the circuit breaker body accommodated in the cradle and selectively attached to and detached from the cradle side terminal,
Side terminal is provided with a first energizing part electrically connected to the main body side terminal on a surface corresponding to a moving direction of the breaker main body,
Wherein the main body side terminal is provided with a second energizing portion selectively attached to and detached from the first energizing portion on a surface facing the first energizing portion,
The cradle-
A fixed plate fixedly coupled to the cradle; And
And a cradle-side housing coupled to the fixed plate and having the first energizing portion fixedly coupled to the moving direction of the circuit breaker body.

delete

The connector according to claim 1,
A terminal box fixedly coupled to the breaker body;
A main body housing movably coupled to the terminal box and having the second energizing unit;
An elastic member coupled at both ends to the terminal box and the main body side housing to elastically support the main body side housing with respect to the terminal box;
And a terminal stopper rotatably coupled to the main body housing to support the main body housing to selectively move according to the position of the breaker main body.

6. The method of claim 5,
Wherein the terminal box is formed with a stopper supporting portion having a predetermined height so as to support the terminal stopper.