JP2012043806A - Bipolar circuit breaker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bipolar circuit breaker capable of securely preventing incorrect line connection at low cost, with a function of enabling prevention of the incorrect line connection easily, and capable of reducing work man-hours for line connection when line connection is newly required.SOLUTION: In a bipolar circuit breaker 10 disposed on a power distribution board to switch a load side circuit on and off, a device body 1 includes: a load side terminal 4 having a wire insertion hole 41 to insert an electric wire toward a quick-connection terminal for connecting the inserted electric wire; a voltage detection hole 5; and a wire connection indication hole 8. There is mounted wire connection prevention means 7 including an insertion portion, formed at one end, to be inserted into the wire insertion hole 41, and a protrusion to be fitted into the wire connection indication hole 8 continuously formed by extending from the insertion portion so as to cover the voltage detection hole 5 from the outside of the device body.

Description

The present invention relates to a two-pole circuit breaker, and more particularly, to a two-pole provided with a wire connection preventing means for preventing a wire from being connected to a load-side terminal of the two-pole circuit breaker in a state of being arranged on a distribution board. It relates to a circuit breaker.

In general, in the distribution board, various types are provided according to the number of branch circuits required. When there is a possibility of increasing the number of branch circuits in the future, a distribution board provided with a spare circuit in advance is often installed in the distribution board in advance.

In order to provide a spare circuit, a branch breaker is provided at a predetermined position in the distribution board in advance, and a dummy breaker is provided at a predetermined position in the distribution board as disclosed in Patent Document 1. May be provided.

As the branch switch provided in the distribution board, in JIS C 8370, a circuit breaker for a distribution board for a house, which is defined as a circuit breaker used mainly in the vicinity of a service entrance of a house, a branch circuit, etc. , JIS C 8371 uses a safety circuit breaker type circuit breaker such as a leakage breaker for a residential distribution board, which is defined mainly as a leakage breaker used in the vicinity of a service entrance, etc., for a branch circuit, etc. There are many cases.

Japanese Patent Laid-Open No. 2003-189423 FIG.

When a branch switch is provided as a spare circuit at a predetermined position in the distribution board in advance, the branch switch as the spare circuit is usually provided at the end of the branch switch arrangement. During installation work, it is often the case that the distribution panel is installed while many wires are exposed, and it may be difficult for the installer to determine which branch switch is a spare circuit. There is a problem that an electric wire is connected to a branch switch provided as a spare circuit by mistake.

In addition, when connecting wires to branch switches other than the branch switch provided as a spare circuit, there may be cases where the wires are temporarily not connected to a specific branch switch in terms of work procedure, but the branch is not connected to the wires. It was difficult to distinguish between switches, and there was a problem that wires were accidentally connected.

Therefore, the present invention has been made in view of such problems,
Although it is low-cost, it has a function that can reliably prevent erroneous connection of wires, and can easily prevent incorrect connection of wires. An object of the present invention is to provide a two-pole circuit breaker that can reduce the number of work steps.

In order to achieve the above object, according to the first aspect of the present invention, there is provided a two-pole circuit breaker arranged on a distribution board for turning on / off a load side circuit, and a device constituting an outer shell of the two-pole circuit breaker The body is provided with a quick connection terminal composed of a terminal plate and a chain spring that is crimped and held in the container and connected to the electric wire, and the electric wire is inserted toward the quick connection terminal. A load-side terminal portion provided with a wire insertion hole, a voltage detection hole in which a part of the load-side terminal portion is exposed at the back of the hole and insulation of the load-side wiring is measured from the outside of the device body, An electric wire connection display hole for confirming that an electric wire is connected to the load side terminal portion from the outside, and an insertion portion to be inserted into the electric wire insertion hole is formed at one end, and the electric voltage detection from the outside of the body The wire connection is formed continuously from the insertion portion so as to cover the hole for use. Is obtained by providing a two-pole circuit breaker is characterized in that the wire connection preventing means is constituted by providing the other end a projection to be fitted in 示孔 mounted.

According to such a configuration, when the distribution board is installed or wired, it is possible to prevent erroneous connection of the wires to the branch switch provided as a spare circuit, and the branch switch that does not temporarily connect the wires. It is possible to provide a two-pole circuit breaker that can reliably prevent an erroneous connection of an electric wire to the cable.

Further, the electric wire connection preventing means may be provided at any one of the poles of the two-pole circuit breaker.

As a result, the operator can recognize that the electric wire is not connected to the branch switch provided with the electric wire connection prevention means by identifying the electric wire connection prevention means provided at any of the poles, and the It is possible to prevent connection.

Even if the operator is unaware of the presence of the wire connection prevention means and accidentally connects the wire, the wire connection prevention means is provided so as to close the load side terminal portion. It is possible to provide a two-pole circuit breaker that cannot be connected and that can prevent erroneous connection of electric wires more effectively.

By providing the wire connection prevention means so as to block all the charging parts that can be contacted from the outside of the body of the bipolar circuit breaker in the arrangement state on the distribution board, it is possible to prevent erroneous connection of the wires reliably. In addition, it is possible to provide a two-pole circuit breaker that can prevent an electric shock accident due to inadvertent contact with a charged part.

When using a spare circuit in the future, the wire connection prevention means is detachably provided, so that the wire connection prevention means can be easily removed when connecting the wire to the branch switch. The work man-hour concerning can be reduced. Moreover, even when it comes to connecting an electric wire to the branch switch which does not connect an electric wire temporarily, an electric wire connection work man-hour can be reduced.

According to the present invention, it is possible to reliably prevent erroneous connection of electric wires at a low cost, and to easily prevent erroneous connection of electric wires, and further, when connection of electric wires is required again. Can provide a two-pole circuit breaker that can reduce the man-hours for connecting the wires.

Hereinafter, a two-pole circuit breaker according to an embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a perspective view of the two-pole circuit breaker according to the first embodiment of the present invention as viewed from the load side terminal portion of the two-pole circuit breaker. The outer shape of the two-pole circuit breaker in the present embodiment is substantially the same as that of a thin circuit breaker in which the dimension in the parallel arrangement direction of the circuit breaker is approximately half the width of a conventional safety breaker. Is formed. The thin circuit breaker has been developed to prevent an increase in the size of the distribution board with an increase in the number of branch circuits in all-electric homes, and is currently being replaced with a conventional safety breaker. .

In the figure, 10 is a two-pole circuit breaker of the present invention, 1 is a container constituting the outline of the two-pole circuit breaker, 2 is rotatably supported inside the container 1 and outside the container 3 is a power supply side terminal portion, 4 is a load side terminal portion, 5 is a detection hole provided for inspecting insulation from the outside of the body 1, and 6 is a power distribution An attachment member for attaching the circuit breaker body to the panel, 7 is an electric wire connection preventing means, and 8 is an electric wire connection display hole provided for confirming that an electric wire is connected from the outside of the vessel body 1.

Next, each component will be described.

The container 1 is configured to be divided in the parallel arrangement direction of the two-pole circuit breaker 10 of the present invention, and includes a power supply side terminal and a load side terminal, and the power supply side terminal and the load side terminal. A contact device comprising a fixed contact and a movable contact that are electrically connected; an open / close mechanism that opens and closes the contact device; an operation member 2 that manually operates the open / close mechanism; and the open / close mechanism when an abnormal current occurs. A tripping mechanism that acts on the tripper and performs a tripping operation, a wire connection display device that visually displays that the wire is connected to the load side terminal portion 4 and the like are provided in predetermined positions.

The power supply side terminal portion 3 is provided with a plug-in type receiving blade connected to a branch line that distributes power from a bus bar arranged on the distribution board to each branch switch, and through the receiving blade, a load side is provided. Power is supplied to the circuit.

The load side terminal portion 4 is constituted by a quick connection terminal structure including a terminal plate and a chain spring, and the wire inserted from the wire insertion hole 41 into which the wire provided in the container 1 is inserted is the chain shape. It is held by being crimped to the terminal plate by a spring.

The detection hole 5 is a measurement hole provided in the body 1 so that insulation measurement can be performed from the outside of the body 1 in order to check the insulation of the wiring on the load side. A part of the terminal board is exposed.

The attachment member 6 is for attaching the two-pole circuit breaker 10 to a predetermined position of the distribution board, and is provided so as to be slidable in a direction connecting the operation member 2 of the two-pole circuit breaker 10 and the attachment surface. When the two-pole circuit breaker 10 is attached to the distribution board, the attachment member 6 is pushed down in the direction of the attachment surface, and is engaged and fixed at the corresponding attachment position on the distribution board side.

The electric wire connection preventing means 7 prevents the electric wire from being connected to the electric wire insertion hole, and is configured by forming an insertion portion to be used by being inserted into the electric wire insertion hole.

The electric wire connection display hole 8 is a confirmation hole provided so that an electric wire connection display device for confirming that an electric wire is connected to the quick connection terminal from the outside of the container 1 can be visually recognized.

FIG. 2 is a perspective view of the two-pole circuit breaker according to the second embodiment of the present invention from the direction of the load side terminal portion of the two-pole circuit breaker. Compared with the two-pole circuit breaker of the first embodiment described above, the configuration of the wire connection preventing means is different.

The wire connection preventing means 71 in FIG. 2 is formed in a stepped shape so as to cover the voltage detection hole 5 while being formed with an insertion portion to be inserted into the wire insertion hole, and is fitted into the wire connection display hole 8. Provided with a protruding portion.

FIG. 3: is the perspective view which faced from the direction of the load side terminal part of this 2 pole circuit breaker for demonstrating the 2 pole circuit breaker of 3rd embodiment of this invention. Compared with the two-pole circuit breaker of the first and second embodiments described above, the configuration of the wire connection preventing means is different.

The wire connection preventing means 72 in FIG. 3 is formed by forming an insertion portion that is used by being inserted into the wire insertion hole. In the first embodiment, the wire connection prevention means 72 is provided by being inserted into both the two-pole wire insertion holes. In contrast, it is used by inserting it into a single-pole wire insertion hole.

FIG. 4: is the perspective view which faced from the direction of the load side terminal part of this 2 pole circuit breaker for demonstrating the 2 pole circuit breaker of 4th embodiment of this invention. Compared with the two-pole circuit breaker of the first, second, and third embodiments described above, the configuration of the wire connection preventing means is different.

The wire connection preventing means 72 in FIG. 4 is formed in a stepped shape so as to cover the voltage detection hole 5 while being formed with an insertion portion to be inserted into the wire insertion hole, and is fitted into the wire connection display hole 8. In the second embodiment, it is inserted into both two-pole electric wire insertion holes, covers both two-pole electric detection holes 5, and both two-pole electric wire connection display holes 8. In contrast to the protrusions that are fitted into the electrode, the protrusions that are inserted into the one-pole electric wire insertion holes, cover the one-pole electric detection holes 5, and are fitted into the one-pole electric wire connection display holes 8. Provided and configured in a staircase shape

Compared with the case where the wire connection preventing means is provided for both of the two poles, the material cost of the wire connection preventing means can be reduced to about half, so that the cost can be further reduced. In addition, at the time of wiring construction, when the wire connection prevention means is provided on either pole, the operator can recognize that the branch switch is a branch switch for a spare circuit. The possibility of erroneous connection of the wires is reduced as much as possible.

In FIG. 5, the figure which removed the electric wire connection prevention means 73 in the two-pole circuit breaker 10 of this invention is shown. Since the wire connection preventing means 73 is used by inserting the insertion portion into the wire insertion hole and fitting the protrusion into the wire connection display hole 8, the attachment and removal can be performed.

For this reason, even when the branch switch provided as a spare circuit in the distribution board is actually used, wiring can be easily performed by removing the wire connection preventing means. In addition, even when the wires are not temporarily connected at the time of construction, if the wires need to be connected again, the wires can be easily connected, the work can be performed efficiently, and the work man-hours can be reduced. Is.

As described above, the two-pole circuit breaker according to the present invention is provided with the wire connection preventing means for preventing the connection of the wires. For example, the spare circuit breaker is prepared for the future increase in the number of branch circuits. There is a possibility that it can be used not as a circuit but as a branch switch for preliminarily placing in the distribution board for replacement when the branch switch arranged in the distribution board fails. .

Further, as defined in JIS C 8370, the two-pole of the present invention is used as a one-pole type electric circuit breaker circuit breaker circuit breaker used as a breaker for a branch circuit of a lamp distribution board. There is a possibility that the circuit breaker can be used as a one-pole circuit breaker without using one pole. In this case, as in the third and fourth embodiments of the embodiments, the wire connection prevention means can be applied to the pole on one side to connect the wire only to one load side terminal portion. Thus, there is a possibility that it can be used as a one-pole circuit breaker or a neutral switch.

That is, when the 2-pole circuit breaker is composed of 2 poles and 2 elements, it can be used as a 1-pole circuit breaker with a tripping element, even if a wire connection prevention means is provided at the load side terminal of any pole. When it is composed of 2 poles and 1 element, it can be used as a neutral switch without a tripping element when an electric wire connection prevention means is provided at the load side terminal portion where the element is provided. When a wire connection prevention means is provided at the load side terminal portion that is not provided, it can be used as a one-pole circuit breaker with a tripping element, and there are two types of circuit breakers depending on the pole where the wire connection prevention means is provided / It can be used as a neutral switch.

It is the external view which showed the circuit breaker of 1st embodiment of this invention. It is the external view which showed the circuit breaker of 2nd embodiment of this invention. It is the external view which showed the circuit breaker of 3rd embodiment of this invention. It is the external view which showed the circuit breaker of 4th embodiment of this invention. It is the figure which removed the electric wire connection prevention means. It is a figure explaining background art.

DESCRIPTION OF SYMBOLS 10 2 pole circuit breaker 2 Operation member 3 Power supply side terminal part 4 Load side terminal part 41 Electric wire insertion hole 5 Electric detection hole 6 Attachment member 7 Electric wire connection prevention means 8 Electric wire connection display hole

Claims (2)

In a two-pole circuit breaker that is placed on a distribution board and turns on and off the load side circuit
In the body constituting the outline of the two-pole circuit breaker,
An electric wire insertion hole for inserting and inserting an electric wire toward the quick connection terminal, including a quick connection terminal including a terminal plate connected to the electric wire and a chain spring that is crimped and held in the container. A load-side terminal provided with
A part of the load side terminal part is exposed in the back of the hole, and a hole for voltage detection for measuring insulation of the load side wiring from the outside of the vessel body,
A wire connection display hole for confirming that the wire is connected to the load side terminal portion from the outside of the container body, and
An insertion part to be inserted into the wire insertion hole is formed at one end,
An electric wire connection prevention that is formed by providing a protrusion at the other end that extends continuously from the insertion portion and fits into the electric wire connection display hole so as to cover the electric detection hole from the outside of the body. A two-pole circuit breaker characterized by comprising means.
2. The two-pole circuit breaker according to claim 1, wherein the electric wire connection preventing means is provided at one of the poles of the two-pole circuit breaker.

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