KR20060087344A - A modular terminal in a mould cased circuit breaker - Google Patents

Abstract

The present invention relates to a modular terminal structure of the circuit breaker, there is an advantage that the type of the circuit breaker can be easily switched by assembling and replacing the terminal module without a separate screw fastening when assembling the terminal portion of the circuit breaker. Here, the terminal module is composed of a terminal unit which is assembled to the circuit breaker and connected to a line on the power supply side or a load side, and a terminal block that supports the terminal part and is mounted on the rail of the circuit breaker.

Description

Modular terminal structure of circuit breaker for wiring {A MODULAR TERMINAL IN A MOULD CASED CIRCUIT BREAKER}

1 is a perspective view showing the terminal structure of a conventional circuit breaker

2 is a perspective view showing a circuit breaker of a conventional box-type terminal type

Figure 3 is a perspective view showing a circuit breaker for a conventional plug-in terminal type

4 is a perspective view showing a modular terminal structure according to an embodiment of the present invention of a circuit breaker for a bar type second terminal and a support block thereof;

5 is a perspective view showing a modular terminal structure of a circuit breaker according to another embodiment of the present invention of a circuit breaker constituted by a box-type second terminal and a supporting block thereof;

Figure 6 is a perspective view showing the modular terminal structure of the circuit breaker according to another embodiment of the present invention composed of a plug-type pin-type terminal and its supporting block

<Explanation of symbols for the main parts of the drawings>

11: circuit breaker 12: box type terminal

13 plug-in terminal 14 second terminal portion

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a circuit breaker, and in particular, in a circuit breaker, a second terminal portion for connecting a first terminal to an external power supply side or a load side line with respect to a fixed first terminal connected to an end of a fixed contact. The present invention relates to a modular terminal structure of a circuit breaker for providing a modular structure so as to easily and quickly switch to a standard type, box type, or plug-in type terminal part.

In general, a circuit breaker is an electrical device that protects a circuit and a load by automatically cutting off a circuit in the event of an electrical overload or a short circuit. The circuit breaker has a terminal part that can make a large connection between the power supply side and the load side, a switch unit which opens or closes a circuit between the power supply connected to the circuit breaker and the load by contacting or separating between the fixed contact point and the movable contact in the circuit breaker, and the power supply side. It consists of a trip part that detects the occurrence of over current or ground current and short circuit current and induces a trip that cuts off the power to the switching mechanism.

Therefore, the circuit breaker protects the load and the circuit by blocking the abnormal current such as over current, ground fault current and short circuit current between the power supply and the load.

Then, a conventional circuit breaker will be described with reference to the accompanying drawings.

1 is a perspective view showing a circuit breaker of a conventional standard terminal type, Figure 2 is a perspective view showing a circuit breaker of a conventional box-type terminal type, Figure 3 is a perspective view showing a circuit breaker of a conventional plug-in terminal type.

As shown in FIG. 1, the conventional circuit breaker includes a female screw portion 1a formed at a terminal portion connecting the power supply side and the load side. The terminal portion provided with the female screw portion 1a is connected to a fixed contact in the circuit breaker 1 and is also electrically connected.

As shown in FIG. 2, a conventional box-type terminal circuit breaker is connected to the terminal part connected to a fixed contact in the circuit breaker 1 and includes a box-type terminal 2 for connecting the terminal part to a power supply side or a load side wire. Doing. Here, the box terminal 2 electrically connects the electric wire and the terminal part by crimping the electric wire drawn into the terminal part using a screw 2a.

As shown in FIG. 3, the conventional plug-in terminal type circuit breaker includes a plug-in terminal 3 which is assembled to the terminal part and connected to the plug-in base.

2 and 3, a conventional circuit breaker constitutes a terminal portion for external line connection of a circuit breaker by skewing the box-shaped terminal 2 and the plug-in terminal 3 with the terminal portion.

This conventional technique is difficult to provide the user with the external line connection terminal part as a separate part because the product assembly time is increased due to the time to tighten the screw and not a module part. Therefore, when the user wants to switch the type of the terminal part for external line connection of the circuit breaker, there is a problem of purchasing a circuit breaker of a desired type.

Accordingly, the present invention has been made to solve the above problems, and an object of the present invention is to provide a modular structure for the external line connection terminal portion of the circuit breaker to switch the type of the external line connection terminal portion of the standard type, box type or plug-in type. It is to provide a modular terminal structure of a circuit breaker that can be easily and quickly, and shorten the assembly time.

In addition, another object of the present invention is to provide a user with a module of the terminal unit for connecting the external line that can be assembled to the fixed terminal connected to the fixed contact of the circuit breaker when the user wants to switch the terminal type of the circuit breaker terminal module The present invention provides a modular terminal structure of a circuit breaker that allows the user to easily switch the terminal type of the circuit breaker by purchasing and replacing only.

The object of the present invention is a circuit breaker,

A plurality of first terminals connected to the fixed contact of the circuit breaker and provided for each pole;

An insulating partition wall electrically insulating the first terminals from each other;

A rail provided at a pair of poles so as to extend from the first terminal in a height direction of the circuit breaker in a height direction and protrude from the insulating partition wall in a width direction of the circuit breaker to extend a predetermined length in the longitudinal direction of the circuit breaker;

A terminal module electrically connected to the first terminal in contact with the first terminal, wherein the terminal module includes a slide groove having a pair of rails for each pole, and a bar-shaped second terminal electrically connected to the first terminal in contact with the first terminal; And a first type terminal module having a terminal support portion for supporting the second terminal,

A second type terminal module having a box-type terminal in contact with the first terminal and electrically connected to the first terminal; a support portion detachably supporting the box-type terminal; and a slide groove portion sandwiching the pair of rails per pole and connected to the support portion. and,

A group of a third type terminal module having a pin-type plug-in terminal, a terminal portion in electrical contact with the first terminal, and a slide groove portion provided between the plug-in terminal and the terminal portion and sandwiching the pair of rails for each pole Any one of the terminal module;

It can be achieved by providing a modular terminal structure of the circuit breaker according to the invention characterized in that it comprises a.

Hereinafter, with reference to the accompanying drawings will be described in detail an embodiment of the present invention.

4 is a perspective view showing a modular terminal structure according to an embodiment of the present invention of a circuit breaker comprising a bar type second terminal and a support block thereof, and FIG. 5 is a box type second terminal and a support block thereof. Figure 6 is a perspective view showing a modular terminal structure of a circuit breaker according to another embodiment of the circuit breaker is configured, Figure 6 is a wiring according to another embodiment of the present invention consisting of a plug-type pin-type terminal and its supporting block A perspective view showing the modular terminal structure of a circuit breaker.

First, the modular terminal structure according to the embodiment of the present invention of the circuit breaker is connected to the fixed contact of the circuit breaker 11 in the circuit breaker 11, as shown in FIG. A first terminal 11-1 provided in the number corresponding to the &lt; RTI ID = 0.0 &gt;), &lt; / RTI &gt; An insulating partition wall 11-2 electrically insulating the first terminals 11-1 from each other; A predetermined interval is spaced from the first terminal 11-1 in the height direction of the circuit breaker 11 (see arrow display), and protrudes from the insulating partition 11-2 in the width direction of the circuit breaker (see arrow display). A rail 11-3 provided in pairs for each pole so as to extend by a predetermined length in the longitudinal direction (see arrow marks) of the circuit breaker 11; The terminal module is in contact with the first terminal (11-1) and electrically connected, wherein the terminal module is provided with a slide groove (S) to sandwich the pair of rails (11-3) for each pole, the first terminal ( 11-1), the bar type second terminal 14 electrically connected to each other, and the terminal support portions 15-1, 15-2, and 15-3 for supporting the second terminal 14 are provided. A terminal module of a first type having; It is configured to include.

Here, as shown in the drawing, the fixed contact is fixedly installed in the circuit breaker together with the movable contact and the switching mechanism, which are not shown, to be a contact for opening and closing the circuit between the power supply and the load. It has a terminal portion connected with.

The first type terminal module includes: a bar-shaped second terminal 14 which is in contact with the first terminal 11-1 and electrically connected thereto; And a first terminal support block for supporting the second terminal 14;

Wherein the first terminal support block, the body portion (15-1); A bottom plate portion 15-1 protruding in the horizontal direction from the body portion 15-1 to form the slide groove portion S; And a terminal support part 15-3 supporting the second terminal 14 and protruding horizontally from the body part 15-1 to form a slide groove part S together with the bottom plate part 15-1. do.

On the bottom plate portion 15-1, a protrusion P protruding upward is provided to reinforce the contact force with the rail 11-3.

Preferably, the height from the upper surface of the bottom plate portion 15-1 to the upper surface of the second terminal 14 provided in the terminal support portion 15-3 is equal to the height of the first terminal 11 from the lower portion of the rail 11-3. Produced in accordance with the predetermined distance and the distance to the lower surface of -1).

Referring to the assembly method of the modular terminal structure of the circuit breaker according to an embodiment of the present invention configured as described above are as follows.

As shown in the right dotted circle in FIG. 4, the assembled second terminal 14 and the first terminal are assembled with the second terminal 14 inserted into the terminal support portion 15-3 of the first terminal support block. The assembly of the terminal support block is slide-in between the first terminal 11-1 and the rail 11-3 with the left side in the drawing forward. At this time, the electric wires on the power supply side and the load side are mechanically and electrically connected to the second terminal 14. Then, the first terminal 11-1 is inserted between both rail portions (unsigned) of the terminal support portion 15-3 facing each other while the first terminal 11-1 contacts the second terminal 14. At the same time, the rail 11-3 is inserted into the slide groove portion S so that the assembly of the second terminal 14 and the first terminal support block is completed to the terminal portion of the circuit breaker 11.

Therefore, electrical connection is made between the load-side wire and the power-side wire and the second terminal 14 and the first terminal 11-1, which are electrical conductors, and when the movable contact in the circuit breaker 11 is in contact with the fixed contact, A load-closed circuit is configured to allow current to flow, and when the movable contact in the circuit breaker 11 is disconnected from the fixed contact, the circuit between the power supply and the load is cut off.

On the other hand, the modular terminal structure according to another embodiment of the circuit breaker according to the present invention, as shown in Figure 5, in the circuit breaker 21, is connected to the fixed contact of the circuit breaker 21, the pole of the circuit (upper) The first terminals 21-1 provided in the number corresponding to the number of terminals 1), and three in this embodiment; An insulating partition wall 21-2 electrically insulating the first terminals 21-1 from each other; From the first terminal 21-1, the wiring breaker 21 protrudes from the insulating partition 11-2 in the width direction (see arrow display) at a height in a height direction (see arrow display). A rail 21-3 provided in pairs for each pole so as to extend by a predetermined length in the longitudinal direction (see arrow display) of the circuit breaker 11; A terminal module that is electrically connected in contact with the first terminal 21-1, wherein the terminal module is a box type terminal 12 that is electrically connected in contact with the first terminal 21-1, and The terminal module of the second type having a support portion 16 detachably supporting the box-shaped terminal 12 and a slide groove portion S which sandwiches the pair of rails 21-3 for each pole and is connected to the support portion 16. and; It is configured to include.

Here, a fixed contact not shown is fixedly installed inside the wiring breaker together with a movable contact and a switching mechanism not shown as described above, and become a contact for opening and closing a circuit between a power supply and a load. It has a terminal portion connected to the electric wire.

The box-shaped terminal 12 is a rectangular box-type terminal having an open front and rear surface, and includes a binding plate of an electrically conductive material that can be lifted to bind the wires and the terminal, and a female thread formed on the upper portion of the box-shaped terminal to lift the binding plate. It has a screw portion which is screwed with the screw hole and can be lifted and connected with the binding plate. Typically, such a box-shaped terminal 12 is used for a stable connection of a wire having a ring-shaped connection terminal, the terminal connected to the fixed contact of the circuit breaker between the binding plate and the bottom of the box-shaped terminal 12 and the power or load-side wire In the inserted state, the screw plate is tightened to lower the binding plate so as to stably electrically connect the terminal and the power supply side or the load side wire.

The second type terminal module includes: a box-shaped second terminal 12 that is electrically connected to the first terminal 21-1; And a second terminal support block detachable from or coupled to the box-shaped second terminal 12 and detachably supporting the box-shaped second terminal 12, wherein the second terminal support block includes:

A body portion 16-2; An under plate portion 16-1 integrally provided at a lower portion of the body portion 16-2 and protruding in a horizontal direction from the body portion 16-2 to form a slide groove portion S; A lower wall portion protruding from the body portion 16-2 so as to form a slide groove portion S together with the bottom plate portion, a side wall portion erected from both ends of the lower wall portion, and an upper wall portion connecting both upper ends of the side wall portion. And a box-type terminal support part 16 supporting the box-type second terminal.

On the bottom plate portion 16-1, a protrusion P protruding upward is provided to reinforce the contact force with the rail 21-3.

Here, reference numeral 16-3 denotes an inner space formed by the box-type terminal support part 16 and detachably coupled to the box-type second terminal 12.

Referring to the assembly method of the modular terminal structure of the circuit breaker according to another embodiment of the present invention configured as described above are as follows.

As shown in the upper dashed circle in FIG. 5, the box-shaped second terminal 12 and the second assembled box-shaped terminal 12 and the second terminal block 12 are inserted into the terminal support 16 of the second terminal support block. Slide the assembly of the terminal support block to the left side in the drawing in the direction of the arrow in the state in which the rail 21-3 is fitted in the slide groove (S) slide slide. Then, a first terminal 21-1 is inserted between the binding plate and the bottom of the box-shaped terminal 12, and in this state, a wire on the power supply side or a load side between the first terminal 21-1 and the binding plate. Insert and insert the binding plate to tighten the screw to complete the electrical connection between the first terminal 21-1 and the wire.

Therefore, the electrical connection is made between the load-side wire and the power-side wire and the first terminal 21-1 and the box-shaped terminal 12, which are electrical conductors, and when the movable contact in the circuit breaker 11 is in contact with the fixed contact, a power supply and a load An inter-closed circuit is configured to allow current to flow, and when the movable contact in the circuit breaker 11 is separated from the fixed contact, the circuit between the power supply and the load is interrupted.

On the other hand, the modular terminal structure according to another embodiment of the circuit breaker in the wiring breaker 31, as shown in Figure 6, is connected to the fixed contact of the circuit breaker 31, the pole of the circuit ( First terminals (see 11-1 of FIG. 4 or 21-1 of FIG. 5) provided in the number corresponding to the upper phase), and three in this embodiment; An insulating partition wall 31-2 electrically insulating the first terminals 21-1 from each other; The wiring breaker protrudes from the first terminal in the height direction of the wiring breaker 31 in the height direction (see arrow display), and protrudes from the insulating partition 31-2 in the width direction of the wiring breaker 31 (see arrow display). A rail 31-3 provided in pairs for each pole so as to extend by a predetermined length in the longitudinal direction (see arrow marks) of the 31; A terminal module electrically connected in contact with a first terminal, wherein the terminal module includes a pin-type plug-in terminal 13, a terminal portion electrically connected to the first terminal, and a plug-in terminal ( A third type terminal module provided between the 13) and the terminal portion 17-3 and having a slide groove portion S for holding the pair of rails 31-3 for each pole; It is configured to include.

Here, a fixed contact not shown is fixedly installed inside the wiring breaker together with a movable contact and a switching mechanism not shown as described above, and become a contact for opening and closing a circuit between a power supply and a load, and the fixed contact is a power supply side and a load side wire. It has a terminal portion connected with.

The third type terminal module,

A second terminal portion (17-3) in contact with the first terminal and electrically connected thereto; A third terminal support block for supporting the second terminal portion 17-3; A plug-in terminal 13 extending downward from the third terminal support block and connected to an external plug-in base (not shown), wherein the third terminal support block includes:

A body portion 17-2; A bottom plate portion 17-1a protruding from the body portion 17-2 in the horizontal direction to form the slide groove portion S; And a terminal support portion 17-1b that supports the second terminal portion 17-3 and protrudes from the body portion 17-2 to form the slide groove portion S together with the bottom plate portion 17-1a. .

In the second terminal portion 17-3, insertion grooves into which the first terminal is inserted are provided at both upper sides thereof.

Referring to the assembly method of the modular terminal structure of the circuit breaker according to another embodiment of the present invention configured as described above are as follows.

In the state where the plug-in terminal and the terminal block are integrally formed as shown in the upper dashed circle in FIG. 6, the rail 31-3 slides the slide groove portion S with the plug-in terminal and the terminal block facing the left side in the drawing. Slide it into the Then, the first terminal is inserted into the insertion groove on the second terminal portion 17-3 to complete the mechanical connection and the electrical connection between the first terminal and the third type terminal module. In this state, the plug-in terminal 13 is inserted into a corresponding electrical connector on the plug-in base to make electrical connection between the circuit breaker and the plug-in base.

Therefore, the electrical connection is made between the plug-in base, the plug-in terminal 13, and the first terminal. When the movable contact in the circuit breaker 31 comes into contact with the fixed contact, a closed circuit between the power supply and the load is formed to flow a current. When the movable contact in the breaker 31 is separated from the fixed contact, the circuit between the power supply and the load in the plug-in base is cut off.

As such, the terminal block for connecting the fixed terminal connected to the fixed contact of the circuit breaker according to the present invention to the power supply side or the load side line has a modular structure, so that a bar type second terminal 14 is used as shown in FIG. 4. In the case of the terminal block of the standard type, the assembly of the second terminal 14 and the supporting block supporting the same is slide-inserted so that the rail 11-3 of the circuit breaker 11 is inserted into the slide groove portion S so that the circuit breaker 11 is inserted. ) To assemble.

And, if the user wants to use a box-shaped terminal as shown in Figure 5 to connect the power supply side and load-side wire having a ring-shaped terminal to the wiring breaker, the assembly of the standard terminal block assembly of the box-type terminal 12 and the box-type support block It can be switched to box type terminal type circuit breaker by replacing with

In the same manner, as shown in FIG. 6, the plug-in terminal 13 may be replaced with the plug-in terminal block 17 in which the plug-in terminal 13 is mounted.

The present invention is not limited to the above-described embodiments, but can be variously modified and changed by those skilled in the art, which should be regarded as included in the spirit and scope of the present invention as defined in the appended claims. something to do.

As described above, according to the modular terminal structure of the circuit breaker according to the present invention, the terminal module of the standard type, box type, plug-in type by modularizing the connection terminal of the power supply side or the load side line connected to the terminal connected to the fixed contact of the wiring breaker. It can switch easily and quickly, and it can reduce the assembly time.

In addition, by providing the user with the module parts assembled in the terminal of the circuit breaker, when the user wants to switch the type of the circuit breaker, only the module parts can be purchased and replaced, so that the type of the circuit breaker can be easily switched and the cost can be reduced It can be effective.

Claims (5)

In circuit breaker, A plurality of first terminals connected to the fixed contact of the circuit breaker and provided for each pole; An insulating partition wall electrically insulating the first terminals from each other; A rail provided at a pair of poles extending from the first terminal in a height direction of the circuit breaker in a height direction and protruding from the insulating partition wall in a width direction of the circuit breaker so as to extend a predetermined length in the longitudinal direction of the circuit breaker; And A terminal module electrically connected to the first terminal in contact with the first terminal, wherein the terminal module includes a slide groove having a pair of rails for each pole, and a bar-shaped second terminal electrically connected to the first terminal in contact with the first terminal; And a first type terminal module having a terminal support portion for supporting the second terminal, A second type terminal module having a box-type terminal in contact with the first terminal and electrically connected to the first terminal; a support portion detachably supporting the box-type terminal; and a slide groove portion sandwiching the pair of rails per pole and connected to the support portion. and, A group of a third type terminal module having a pin-type plug-in terminal, a terminal portion in electrical contact with the first terminal, and a slide groove portion provided between the plug-in terminal and the terminal portion and sandwiching the pair of rails for each pole Any one of the terminal module; Modular terminal structure of the circuit breaker, characterized in that comprising a. The method of claim 1, wherein the first type of terminal module, A bar-shaped second terminal in electrical contact with the first terminal; And a first terminal support block supporting the second terminal, wherein the first terminal support block comprises: A body portion; A bottom plate portion protruding from the body portion to form the slide groove portion; And a terminal support portion protruding from the body portion to support the second terminal and to form the slide groove portion together with the bottom plate portion. The method of claim 1, wherein the second type of terminal module, A box-shaped second terminal in contact with the first terminal and electrically connected to the first terminal; A second terminal support block coupled to or detachable from the box-shaped second terminal, the second terminal support block supporting the box-shaped second terminal, wherein the second terminal support block includes: A body portion; A bottom plate portion protruding from the body portion to form the slide groove portion; The box-shaped second terminal includes a lower wall portion protruding from the body portion to form the slide groove portion together with the bottom plate portion, a side wall portion formed from both ends of the lower wall portion, and an upper wall portion connecting both upper ends of the side wall portion. Modular terminal structure of a circuit breaker, characterized in that consisting of; The method of claim 1, wherein the third type terminal module, A second terminal portion in electrical contact with the first terminal; A third terminal support block for supporting the second terminal portion; A plug-in terminal extending downward from the third terminal support block and connected to an external plug-in base, wherein the third terminal support block is A body portion; A bottom plate portion protruding from the body portion to form the slide groove portion; And a terminal support portion protruding from the body portion to support the second terminal portion and to form the slide groove portion together with the bottom plate portion. 5. The modular terminal structure of a circuit breaker according to claim 2, further comprising a protrusion projecting upward on the bottom plate to enhance contact force with the rail.

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