JP2013246996A - Two-pole circuit breaker - Google Patents

Abstract

Provided is a two-pole circuit breaker that can easily pull out an output signal lead line of a CT of a circuit breaker and can be securely fixed at a predetermined position.
A current transformer (CT) mounted on a main circuit conductor, a CT output signal lead line for transmitting an output signal of the CT to the outside of the body, and the main circuit conductor are connected to another main circuit conductor. A two-pole circuit breaker comprising an inter-electrode insulating wall that insulates from an electrode conductor, and a body provided with a CT output signal lead wire outlet, wherein a CT output signal lead wire is wound around the inter-electrode insulating wall. A bald portion is integrally formed from the CT output signal lead wire to be held.
[Selection] Figure 1

Description

The present invention relates to a structure for fixing a CT output signal lead line for transmitting an output signal from the CT to the outside in a circuit breaker incorporating a current transformer (CT) incorporated in a distribution board.

In recent years, systems that manage and control electrical energy used in houses, buildings, and the like using sensors and information communication technology are becoming widespread. In order to measure the electric energy used, various distribution boards having a function of measuring current are disclosed in the distribution board that plays a role of receiving electricity and distributing power to each load circuit. .

Patent Document 1 discloses a distribution board provided with a current transformer outside each circuit breaker in order to detect a current flowing through a main circuit breaker and a branch circuit breaker arranged in the distribution board. Has been. In this patent document 1, the electric current connected to a circuit breaker is made to penetrate a current transformer, a current detection element (CT) is installed, and the form by which the signal wire | line from a current detection element is derived | led-out in a distribution board is the form. It has been taken.

In such a configuration, a large number of branch circuit breakers (11b) are arranged in the distribution board, and a large number of signal lines (13) are connected to each branch circuit breaker (11b) in the distribution board. To be derived. For this reason, since many signal lines (13) float over a distribution board, the subject that it becomes easy to produce the miswiring of the signal lines to an external monitor etc. is indicated. In particular, in the distribution board, the lead-in wires and the wires (C) to each load side are floating and congested, and miswiring with these and the thin signal wires to other parts A distribution board (1) excellent in workability capable of easily and reliably connecting a signal line (13) is provided for a problem in which pinching or the like easily occurs and wiring connection work is difficult. . Specifically, the distribution board (1) includes a terminal block (14) for connecting the output end of the signal line from which the output end is led out from the current detection element (11b). (Fig. 9)
On the other hand, since the position of the current detection element (CT) is penetrated through the electric wire connected to the circuit breaker, the degree of freedom occurs within the range of the length of the signal line. When the signal line is pulled, the CT position moves within the range of this degree of freedom.

Patent Document 2 discloses an example in which CT is arranged not inside the circuit breaker but inside the circuit breaker. This is an in-home electrical energy measurement system that can measure and display the electrical energy of the entire house. In this patent document 2, a branch current transformer (75) for detecting a current flowing through a branch circuit is provided in each branch breaker (7), and the detection signal of the branch current transformer (75) It is drawn out to the outside of the breaker via the outlet (76) and is led to a lead wire (77) and a harness (78) provided at the tip thereof. (Fig. 10)

In such a configuration, when the CT is built inside the circuit breaker body, the CT lead wire provided with the connector is pulled out from the hole provided on the side of the circuit breaker case. When the CT lead wire is pulled from the outside, a configuration is required in which stress is not applied carelessly to the portion where the lead wire is connected.

Conventionally, the lead wire itself has a larger knot than the lead-out port in the vicinity of the lead-out port inside the body of the lead wire, so that no further lead wire is drawn out to the outside. In addition, the lead wire is bundled with a binding band in the vicinity of the outlet inside the container, so that the binding portion of the binding band does not come out of the outlet and the lead wire is not further drawn out.

JP 2010-57238 A (FIG. 1) JP 2001-103622 A (FIG. 6)

However, it is difficult to position a knot with a lead wire itself at a predetermined position inside the container or to bind the lead wire with a binding band, and the number of work steps increases. Further, since separate parts such as a binding band are required, the manufacturing cost increases, and there is a problem that an unnecessary portion of the binding band needs to be cut and discarded. Also, the movement in the direction of pushing, not the direction of pulling out the electric wire, cannot be suppressed, and inadvertent pushing may cause pressure on internal parts or cause unnecessary stress to be applied to the lead wire connection part. It was.

In view of the above problems, an object of the present invention is to provide a two-pole circuit breaker that is easy to pull out an output signal lead line of a CT of a circuit breaker and can be securely fixed to a predetermined position. .

The circuit breaker according to the present invention is configured to solve the above-described problem, and the two-pole circuit breaker according to claim 1 includes a current transformer (CT) mounted on a main circuit conductor, and the current breaker (CT). A CT output signal lead wire for transmitting the CT output signal to the outside of the device body, an inter-electrode insulating wall that insulates the main circuit conductor from other pole conductors, and a device body provided with a CT output signal lead wire lead-out port A two-pole circuit breaker provided with a CT output signal lead wire that wraps and holds the CT output signal lead wire around the inter-electrode insulating wall and is integrally formed.

According to such a configuration, the CT output signal lead wire is integrally formed on the inter-electrode insulating wall arranged inside the container, and therefore, at the time of assembly, the CT output signal lead wire is tied to the barb portion. The work is completed and the position of the curled portion relative to the internal parts is relatively fixed. Therefore, the CT output signal lead line can be wired to a predetermined length of pullout, ensuring good workability and reliability. Can be fixed. In addition, since a separate part such as a binding band is not required, a two-pole circuit breaker can be provided while suppressing an increase in cost.

According to a second aspect of the present invention, the CT output signal lead-out line is formed on the inter-electrode insulating wall via an elastic part.

According to the second aspect of the present invention, even when the CT output signal lead wire tangled to the curled portion is pulled, the elastic portion bends to relax the pulling force, and the CT output signal is more than necessary. No stress is applied to the connecting part of the lead wire.

According to a third aspect of the present invention, the CT output signal lead-out line is provided near the CT output signal lead-out part, while the CT output signal lead-out line is pulled from outside the body. In some cases, an abutting portion that abuts on the inner wall of the container near the CT output signal lead-out portion is provided.

According to the third aspect of the present invention, when the CT output signal lead line is pulled, the curled portion bends. However, when a predetermined force is applied, the bent curled portion is connected to the inner wall of the body. Abuts and no longer bends.
Inside the container, unnecessary stress is not applied to the connection portion of the CT output signal lead line tangled to the lash portion, and the connected state can be maintained reliably.

According to the present invention, it is possible to provide a two-pole circuit breaker that is easy to pull out the output signal lead line of the CT of the circuit breaker and can be reliably fixed at a predetermined position.

The perspective view from the load terminal side of the circuit breaker which shows 1st Embodiment is shown. The perspective view of the state which pulled out CT output signal lead line concerning the embodiment is shown. The perspective view of the state which decomposed | disassembled the case of the container which concerns on the embodiment is shown. The perspective view of the state which decomposed | disassembled the case of the container which concerns on the embodiment is shown. The perspective view of the state which decomposed | disassembled the case of the container which concerns on the embodiment is shown. The perspective view of the state which decomposed | disassembled the electrode insulation wall is shown. The perspective view of the inter-electrode insulation wall concerning other embodiments is shown. The perspective view of the inter-electrode insulation wall concerning the embodiment is shown. The circuit breaker in a prior art example is shown. The circuit breaker in a prior art example is shown.

Next, an embodiment of a circuit breaker according to the present invention will be described in detail with reference to FIGS.

(First embodiment)
(External configuration of circuit breaker)
A first embodiment will be described with reference to FIGS. The two-pole circuit breaker 1 of the present invention is a circuit breaker used as a branch circuit breaker of a distribution board. When the direction connecting the power supply side and the load side is the longitudinal direction, the circuit breaker 1 overlaps the first case 101 and the second case 102 divided in the longitudinal direction from both sides in the width direction. The outer shell, that is, the container is constructed. Each component constituting the circuit breaker 1 is housed so as to be sandwiched between the divided first case 101 and second case 102.

Hereinafter, in the longitudinal direction, the side provided with the wire insertion holes 105 and 106 in the figure is referred to as a load side, and in the longitudinal direction, the opposite side of the wire insertion holes 105 and 106 is referred to as a power source side. The side where the operation handle 103 to be operated is provided is the front side, the side attached to the mounting plate for mounting and fixing the circuit breaker is the bottom side, and the direction connecting the left and right wire insertion holes 105 and 106 is the width direction. Do.

(Internal configuration of circuit breaker)
Inside the body of the circuit breaker 1, there are a power supply side terminal 107 provided on the power supply side, a load side terminal provided on the load side, a main circuit conductive portion 109 connected to these terminals, and the main circuit conductive portion 109. A contact switching mechanism that contacts / separates the contacts provided on the main circuit conductive portion 109, and when an abnormal current such as an overcurrent flows through the main circuit conductive portion 109, the contact switching mechanism acts on the contact switching mechanism. An automatic shut-off mechanism to be operated, a current transformer (CT) 108 through which the main circuit conductor 109 is inserted, etc. are provided. The contact opening / closing mechanism is operated by the operation handle 103 in addition to the operation by the automatic shut-off mechanism. It can be manually turned on and off.

(CT output signal lead line)
In the CT 108, an induced current is generated according to the magnitude of the current flowing through the main circuit conductor 109 inserted in the CT. In order to transmit this induced current to the outside as an output signal of the CT, A CT output signal lead line 110 connected to the output terminal is connected. The CT output signal lead-out line 110 is provided so as to extend to the front side, and after being entangled by a curl portion to be described later, the CT output signal lead-out line 1021 is provided outside the body from a CT output signal lead-out portion 1021 provided in the body. Pulled out.

A connector 111 for connecting to an external electric wire is provided at the end of the CT output signal lead wire 110 outside the container.

The CT output signal lead wire 110 drawn out of the body is stored in a CT output signal lead wire storage portion 1021 formed on the side wall surface of the second case 102. The CT output signal lead line storage part 11021 is formed continuously from the CT output signal lead line lead part 1021 toward the bottom side and the load side, and guides the lead direction of the CT output signal lead line 110 in a predetermined direction. .

(CT output signal lead-out section)
The CT output signal lead-out portion 1021 is formed in the second case 102 in this embodiment. The CT output signal lead-out portion 1021 is configured by forming, in the second case 102, a slit 1023 that reaches 1021A from the overlapping surface side 1020A to the side wall surface side. The slit 1023 is formed with a taper so as to gradually spread from the side wall surface side 1021A to the overlapping surface side 1020A in the width direction. This makes it easier to guide the CT output signal lead-out line 110 into the slit 1023.

The first case 101 is provided with a protrusion 1011A that fits with the slit 1023 when overlapped with the second case 102. The fitting portion 1011A is formed at an angle corresponding to the tapered shape of the slit 1023 on the front surface side-bottom surface side, and the length in the width direction is the side of the slit 1023 when the case is overlapped. A gap corresponding to the thickness of the CT output signal lead line 110 is provided from the wall surface side. When the cases are overlapped, the CT output signal lead-out portion 1021 is located at the body corner of the second case 102.

The fitting portion 1011A serves as a guide for placing the CT output signal lead wire 110 on the side wall surface side of the slit 1023. The difference (Δh) between the side surface 1021A and the overlapping surface side 1020A of the slit 1023 formed in the tapered shape on the front surface side-bottom surface direction is the same as the thickness (φ) of the CT output signal lead line 110. When the cases are overlapped, the CT output signal lead line 110 is gradually led to the back side of the slit, and the CT output signal lead line 110 is not sandwiched. Cases can be overlapped.

(Insulation wall between electrodes)
The inside of the circuit breaker 1 is insulated from each other by an inter-electrode insulating wall 104. The inter-electrode insulating wall 104 is disposed in the container in a substantially flat shape in the longitudinal direction of the circuit breaker from the power supply side terminal portion 107 to the load side, and insulates the inter-electrode. The inter-electrode insulating wall 104 is integrally formed with a CT output signal lead-out line 1041 that connects the CT output signal lead-out line on the load side.

The CT output signal lead-out line 1041 is located in the vicinity of the CT output signal lead-out part 1021 inside the container. Further, it is located in front of the CT 108.

First, the CT output signal lead-out line 1041 is integrally formed via an elastic portion 1042 formed by providing a U-shaped bent portion 1041b on the interelectrode insulating wall 104, and is formed in the width direction. The structure is easy to bend.

(Structure of the CT output signal lead-out line)
The CT output signal lead-out line 1041 is configured to extend the CT output signal lead-out line 110 and extends in the direction of the CT 108 and is formed in the width direction of the vessel body. The CT output signal lead-out line introduction part a (1041a) for connecting the lines and the CT output signal lead-out line from the second case 102 side are arranged and the first case 101 side is pulled out. A bent portion a (1041b), a curled portion c (1041c) for curling the CT output signal lead line from the first case 101 side to the second case 102 side, and curled CT A CT output signal lead having a slit narrower than the thickness of the CT output signal lead line in order to pull out and hold the output signal lead line toward the second case 102. It includes a out line nip fixing unit d (1041d), the.

(Wiring form)
The CT output signal lead-out line 110 is wired as follows. The CT output signal lead line 110 extending forward from the CT 108 is first disposed on the bottom surface side of the CT output signal lead line introduction part a (1041a), and the first case 101 side from the second case 102 side. The bent portion b (1041b) is drawn toward the front side. Then, the curled portion c (1041c) is curled from the first case 101 side to the second case 102 side, pulled out to the second case 102 side, and fixed to the CT output signal lead line. It arrange | positions so that it may be inserted | pinched between part d (1041d), and it pulls a CT output-signal lead wire to the bottom face side, and pinches and fixes.

Since the path length from the CT output signal lead-out line connecting portion of the CT 108 to the CT output signal lead-out pin sandwiching and fixing portion d is constant, the CT output signal lead-out line 110 is always tangled by these configurations. A predetermined position of the output signal lead line is fixed. That is, the length of the CT output signal lead-out line 110 drawn out of the body is kept constant.

On the other hand, the CT output signal lead-out portion 1041 is easily bent in the width direction. In order to suppress this width-direction bend within a specified range, the CT output signal lead-out portion 1041 is bent. Have contact portions 1041A1 and 1041A2 that are formed in a ridge shape in the width direction and abut against the side walls formed between the inner walls of the first case 101 and the second case 102 inside the vessel body, respectively. Is formed.

When an external force is applied from the CT output signal lead wire to the bald portion, the CT output signal lead wire bald portion 1041 bends in the width direction by the size of the gap, thereby reducing the external force within a specified range. If an external force is still applied after contacting the inner wall, the position change in the width direction no longer occurs by contacting the inner wall, so an unnecessary external force is applied to the connection portion of the CT output signal lead line. There is nothing. That is, when the CT output signal lead-out line is pulled, the CT output signal lead-out line 1041 bends toward the second case, and when the CT output signal lead-out line is pushed in, the first output However, it is suppressed to be bent within a specified range, and unnecessary external force is not applied to the connection portion of the CT output signal lead line.

(Second Embodiment)
A second embodiment will be described with reference to FIGS. In the present embodiment, the shape of the bald portion c (1041c) of the bald portion 1041B of the CT output signal lead-out line is different from the shape of the first embodiment.

In this embodiment, the shape of the bald portion Bc (1041Bc) of the CT output signal lead-out line 1041B is changed from the front side to the bottom side from the first case 101 side to the second case 102 side. A taper shape is formed so that the curled portion Bc becomes thinner as it moves.

(Structure of the CT output signal lead-out line)
The configuration of the CT output signal lead-out line is substantially the same as that of the first embodiment, and the CT output signal lead-out part 1041B is configured to strip the CT output signal lead-out line 110. From the side of the second case 102, a CT output signal lead line introduction portion Ba (1041Ba) that extends in the direction of the CT 108 and is formed across the width direction of the vessel body to connect the CT output signal lead line. The CT output signal lead-out line is arranged, and the bent portion Bb (1041Bb) to be opened toward the first case 101 side, and the CT output signal from the first case 101 side to the second case 102 side. A bald portion Bc (1041Bc) for pulling and pulling the lead wire and the CT output signal lead wire bent are pulled out to the second case 102 side and held and fixed. And a, and width to form the narrow slit CT output signal lead wire nip fixing unit Bd (1041Bd) than the thickness of the CT output signal lead lines for.

(Wiring form)
The CT output signal lead-out line 110 is wired as follows. The CT output signal lead-out line 110 extending forward from the CT 108 is first arranged on the bottom side of the CT output signal lead-out line introduction portion Ba (1041Ba), and from the second case 102 side to the first case 101 side. The bent portion Ba (1041Bb) is drawn toward the front side. Then, the curled portion Bc (1041Bc) is curled from the first case 101 side to the second case 102 side, pulled out to the second case 102 side, and fixed to the CT output signal lead line. It arrange | positions so that it may pinch | interpose in part Bd (1041Bd), and pulls a CT output-signal lead-out line to the bottom face side, and pinches and fixes it.

In the present embodiment, as the shape of the curled portion Bc (1041Bc) is shifted from the front surface side to the bottom surface side from the first case 101 side to the second case 102 side, the curled portion Bc becomes thinner. Since the taper-shaped part (1041Bc1) is formed in the CT output signal lead line 110, the CT output signal lead line 110 is disposed so as to be sandwiched between the CT output signal lead line sandwiching fixing parts Bd (1041Bd), and the CT output signal lead line is pulled to the bottom side. Sometimes, the CT output signal lead-out line 110 bites into the tapered portion (1041Bc1), and positioning and fixing can be performed more firmly.

By fixing the CT output signal lead line in this manner, the CT output signal lead line 110 connected to the CT 108 is arranged in a predetermined path, and the wiring is completed simply by pulling it to the bottom surface side.
It is possible to provide a two-pole circuit breaker that is easy to pull out the output signal lead line of the CT of the circuit breaker and can be securely fixed at a predetermined position.

DESCRIPTION OF SYMBOLS 1 Circuit breaker 101 1st case 1011A Fitting part 102 2nd case 1020A Overlapping surface 1021 CT output signal lead-out part 1021A Side wall side 1022 CT output signal lead-out storage part 1023 Slit 103 Operation handle 104 Between electrodes Insulating wall 1041 CT output signal lead-out line bent part 1041a CT output signal lead-out line introduction part a
1041b Bent part 1041c Bald part 1041d CT output signal lead line clamping part 1041B CT output signal lead line bald part B
1041Ba CT output signal lead line introduction part Ba
1041Bb Bent part B
1041Bc Tease B
1041Bd CT output signal lead wire sandwiching part B
1042 Elastic part 1043 Contact part 1043A1 Contact part A1
1043A2 contact part A2
105 Electric wire insertion hole 106 Electric wire insertion hole 107 Power supply side terminal 108 Current transformer (CT)
109 Main circuit conductor portion 110 CT output signal lead wire 111 Connector 112 Interelectrode insulating member 1121A Fitting portion

Claims (3)

A current transformer (CT) mounted on the main circuit conductor;
A CT output signal lead line for transmitting the CT output signal to the outside of the vessel;
An inter-electrode insulating wall that insulates the main circuit conductor from other pole conductors;
A two-pole circuit breaker comprising a body provided with a CT output signal lead wire outlet,
A two-pole circuit breaker characterized in that a bald portion is integrally formed from a CT output signal lead wire for winding and holding a CT output signal lead wire around the inter-electrode insulating wall. The CT output signal lead-out line is connected to
The two-pole circuit breaker according to claim 1, wherein the two-pole circuit breaker is formed on the inter-electrode insulating wall via an elastic portion. The CT output signal lead-out line is connected to
While provided in the vicinity of the CT output signal lead line lead portion,
3. The bipolar circuit according to claim 2, further comprising an abutting portion that abuts on the inner wall of the body in the vicinity of the CT output signal lead-out portion when the CT output signal lead-out wire is pulled from outside the device. Circuit breaker.

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