JP2012074336A - Circuit breaker ct output signal leader line accommodation structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a circuit breaker CT output signal leader line accommodation structure which restrains the CT output signal leader line of a built-in current transformer (CT), which is led out from a branch breaker, from inadvertently touching connecting wires or other circuits on the load side, and also prevents it from hindering wiring connection or disconnection work as will be carried out during distribution switchboard installation, thus helping to increase the efficiency of wiring work.SOLUTION: A circuit breaker has disposed inside thereof a current transformer (CT) having a main circuit conductive unit which interconnects power supply side and load side terminals inserted in place, and has a CT output signal leader line for leading the output signal of the CT out from inside the equipment body disposed for the leader line to be led out from the load side terminal side of the equipment body to the outside thereof. When a plurality of such circuit breakers are arranged side by side, there is provided a CT output signal leader line accommodation unit for accommodating the CT output signal leader line to ensure that the CT output signal leader line will not protrude in the juxtaposed direction of circuit breakers.

Description

The present invention relates to a storage structure of a CT output signal lead line for transmitting an output signal from a current transformer (CT) of a circuit breaker incorporated in a distribution board to the outside, and more particularly, a branch disposed in the distribution board. The present invention relates to a storage structure for a CT output signal lead line of a circuit breaker.

In Patent Document 1, it is possible to measure the power consumed by home appliances connected to a branch breaker, the generated power from an auxiliary power source, etc., and to reliably grasp the usage status of electrical energy in the entire house. A distribution board with a measurement function is disclosed.

In this distribution board with measurement function, the main current transformer that detects the current that flows through the load side circuit of the main breaker, the branch current transformer that detects the current that flows through the load side circuit of the branch breaker, and the load of the auxiliary breaker Auxiliary current transformers that detect the current flowing through the side circuits, and the currents detected by these main current transformers, branch current transformers, and auxiliary current transformers, and the voltage of the main circuit, and buy and sell via the main circuit. A distribution board comprising measuring means for measuring bidirectional power, each power consumed in each branch circuit, and power generated by the auxiliary power supplied via the auxiliary power supply circuit It is.

In particular, in this distribution board, each branch breaker has a built-in branch current transformer so that the current flowing through the branch circuit can be detected by the branch current transformer. Power consumption can be measured. As shown in the connection diagram inside the distribution board of FIG. 3 in Patent Document 1, the wiring between the branch current transformer and the measuring means is connected to a lead wire 77 that is a detection signal line of the branch current transformer 75 and each of the wirings. Wiring is performed in an orderly manner by connecting the harness wires 79 to each other using the harness 78. Usually, such a lead wire 77 and each harness wire 79 are connected using the harness 78 between the case constituting the distribution board on the back side of the mounting plate on which the branch breaker is placed and the mounting plate. It is done using space.

JP 2001-103621 A

The distribution board in which the branch current transformer is built in each branch breaker can detect the current flowing through the branch circuit with the branch current transformer, and can detect the current through the detection signal line of the branch current transformer 75. While a certain lead wire 77 and each harness wire 79 can be arranged in an orderly and simple manner using the harness 78, when a large number of branch breakers are arranged in parallel, a load-side wire connected to the load-side terminal of the branch breaker As a result, the aforementioned lead wires, harnesses, etc. are loaded not only in the direction in which the branch breakers are arranged in parallel, but also in the direction from the front side to the back side facing the surface on which the handle of the branch breaker is provided. There was a risk that the wiring work would be difficult due to contact with the side electric wires or interference during wiring construction.

Also, if it is necessary to replace the branch breaker on the distribution board once wired, select the load side wires, lead wires and harnesses arranged in parallel, and load the branch breaker to be replaced. It is necessary to remove the corresponding branch breaker from the distribution board after selecting the side wires and lead wires. In addition, after installing a new branch breaker to the distribution board, it is necessary to connect the removed load-side wires, lead wires, and harness to their original positions. When force is applied and stress is applied, there is a possibility that a defect may occur in wiring connection.

The present invention has been made in view of the above problems, and the CT output signal lead wire of the built-in current transformer (CT) drawn from the branch breaker is mixed with the load-side connecting wire and the wires of other circuits. Provide a CT output signal lead-out line storage structure for circuit breakers that not only hinders work when connecting / separating wiring, such as during distribution board construction, but also improves wiring workability For the purpose.

The CT output signal lead wire storage structure of the circuit breaker according to the present invention is configured to solve the above-described problems, and the main circuit conductive portion that connects between the power supply side terminal and the load side terminal is inserted. A current transformer (CT) is disposed inside the body, and a CT output signal lead line for leading out the output signal of the CT to the outside of the body is provided to be pulled out from the load side terminal side of the body. In the circuit breaker provided, the CT output signal lead line housing the CT output signal lead line so that the CT output signal lead line does not protrude in the juxtaposition direction when the plurality of circuit breakers are juxtaposed. A housing structure for the CT output signal lead line of the circuit breaker may be configured.

According to such a configuration, when the circuit breakers are juxtaposed, the CT output signal lead-out line does not protrude in the juxtaposition direction, and the load side wires and other circuit breakers in other circuit breakers Since the CT output signal lead-out line in the instrument is not touched, it is difficult to disturb the work when connecting / separating the wiring such as when installing the distribution board, and the circuit breaker can improve the wiring workability It is possible to provide a storage structure for the CT output signal lead line of the device.

The CT output signal lead-out line has a side in which the circuit breaker body is arranged side by side, and the side of the circuit breaker body on which the handle for operating the circuit breaker is provided. When the front side, the side to be attached to the circuit breaker mounting plate is the bottom side, a recess for fitting the CT output signal lead wire is provided from the front side to the bottom side of the vessel side on the side of the vessel side. It is good to constitute the storage structure of the CT output signal lead line of the circuit breaker.

According to such a configuration, the CT output signal lead line can be accommodated by fitting the CT output signal lead line into the recess, and the CT output signal lead line is provided when the circuit breakers are arranged in parallel. It can be regulated so that it does not protrude in the direction of body alignment.

The CT output signal lead-out line storage section is provided with a passage portion through which a CT output signal lead-out line partially opened is provided in a lock lever for mounting and fixing the circuit breaker on the bottom of the distribution board. As a feature, a storage structure for the CT output signal lead line of the circuit breaker may be configured.

According to this configuration, by passing the CT output signal lead line through the lock lever, the CT output signal lead line swells in the direction in which the circuit breakers are juxtaposed when the circuit breaker is juxtaposed. Can be regulated so that it will not float or float.

The storage part of the CT output signal lead line is
A safety unit that is formed integrally with a lock lever for mounting and fixing the circuit breaker on the inner bottom of the distribution board, and includes an extending portion that extends from the lock lever on the front side of the device body. The device may be provided with a passage portion through which the CT output signal lead line passes from the front side to the bottom side, and the CT output signal lead line storage structure of the circuit breaker may be configured.

According to such a configuration, by passing the CT output signal lead line through the safety device, the amount of exposure of the CT output signal lead line to the outside of the body is reduced. It is possible to provide a storage structure for the CT output signal lead line of the circuit breaker that can be controlled so that the output signal lead line is not swelled or floated in the direction of juxtaposition of the device body, and has a good appearance.

As described above, according to the present invention, the CT output signal lead wire of the built-in current transformer (CT) drawn out from the branch breaker is restricted from coming into contact with the load-side connecting wire and other circuit wires, It is possible to provide a CT output signal lead-out line storage structure for a circuit breaker that is unlikely to hinder work when wiring is connected / separated, such as when installing a distribution board, and can improve wiring workability.

The external appearance block diagram of the circuit breaker which shows 1st embodiment of this invention is shown. The principal part enlarged view of 1st embodiment is shown. The external appearance block diagram of the attachment board of a circuit breaker is shown. The enlarged view of the bottom face side of a circuit breaker is shown. The external appearance block diagram of the circuit breaker which shows 2nd embodiment of this invention is shown. The principal part enlarged view of 2nd embodiment is shown. The external appearance block diagram of the circuit breaker which shows 3rd embodiment of this invention is shown. The principal part enlarged view of 3rd embodiment is shown. The figure of the state which mounted the circuit breaker in 3rd embodiment in the attachment board is shown.

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

(First embodiment)
FIG. 1 is an external perspective view of a circuit breaker 1 provided with a CT output signal lead wire accommodating portion according to the present invention. FIG. 2 is an enlarged view of a main part of the storage part of the CT output signal lead line of the circuit breaker 1. The circuit breaker 1 is formed by housings 101 and 102 whose body is divided in the longitudinal direction. At each end in the longitudinal direction of the vessel body, there are provided a power supply side terminal connected to the power supply and a load side terminal for supplying power to the load side circuit.

Inside the container, a main circuit conductive part connected to the power supply side terminal and the load side terminal, a contact opening / closing mechanism for contacting / separating contacts provided in the main circuit conductive part interposed in the main circuit conductive part, When an abnormal current flows through the main circuit conductive portion, an automatic shut-off mechanism that operates the contact switching mechanism to turn off the circuit and a current transformer (CT) through which the main circuit conductor portion is inserted are provided. In the CT, an induced current is generated in accordance with the magnitude of the current flowing in the main circuit conductor portion inserted in the CT. In order to transmit this induced current to the outside as an output signal of the CT, the CT output A CT output signal lead line 110 connected to the end is connected. The CT output signal lead-out line 110 is extended outside the container. Further, a connector 111 for connecting to an external electric wire is provided at the end of the CT output signal lead wire 110. An operation handle 103 for turning on and off the contact opening / closing mechanism from the outside of the housing is provided on the front side of the housing.

105 and 106 are electric wire insertion holes for inserting and connecting load side electric wires reaching the load side circuit to the load side terminals. The power supply side terminal is configured by using a plug-in type terminal, and the load side terminal is configured by using a lock connection terminal.

The direction in which the circuit breaker bodies are arranged side by side is the side surface, and the side of the circuit breaker body on which the operation handle 103 for operating the circuit breaker is provided is the front side, and the circuit breaker The side attached to the mounting plate for mounting and fixing is defined as the bottom side. Moreover, let the power supply side terminal side of the circuit breaker 1 be a front side, and let the load side terminal side be a back side.

FIG. 3 shows a mounting plate 2 for mounting and fixing the circuit breaker 1. The mounting plate 2 is used as the bottom of the distribution board, and is mounted with internal devices such as the circuit breaker 1 and buses 201, 202, and 203 for supplying power to the internal devices.

The mounting plate 2 operates as a circuit breaker when the circuit breaker 1 is mounted, and the first restricting portions 204 and 205 that interact with the circuit breaker and restrict the movement of the branch circuit breaker in the front side-bottom direction. A second restricting portion 206 that restricts the movement in the direction from the front side to the back side is provided.

The first restricting portion 204 is formed by cutting and raising a part of the mounting plate 2, and the end portion is an engagement piece. On the circuit breaker 1 side, as shown in FIG. 4, the concave portion 107 into which the first restricting portion is fitted on the bottom surface side of the circuit breaker 1 and the bottom surface side of the concave portion are provided to act on the engagement piece. Engaging engagement pieces 108 are provided. When the circuit breaker 1 is attached to the mounting plate 2, the engagement pieces engage with each other, thereby restricting the movement in the direction from the front side to the bottom side on the bottom side of the circuit breaker.

The first restricting portion 205 is formed to protrude from the mounting plate, and the first restricting portion 205 and the first restricting portion 205 formed on the front side of the circuit breaker 1 are fitted. For this reason, the movement in the direction from the front side to the back side is restricted on the front side of the circuit breaker. Since these restricting portions 204 and 205 restrict the movement in the front side-bottom side direction on both the front side and the back side of the circuit breaker, the circuit breaker can be more firmly fixed to the mounting plate.

The second restricting portion 206 is formed by bending a part of the mounting plate 2 into a concave shape to form a concave portion. On the back side of the circuit breaker 1, a lock lever 1041 is provided to project from the bottom surface of the circuit breaker 1 and to selectively select whether or not by the external knob 1042, and projects from the bottom surface of the circuit breaker 1. When the lock lever 1042 fits into the recess of the second restricting portion 206 and fits with each other, the movement of the circuit breaker in the direction from the front side to the back side is restricted.

When the circuit breaker 1 is attached to the mounting plate 2, the circuit breaker 1 is slid in the direction of the bus on the mounting plate 2, so that the bus is inserted into the power supply side terminal and the first The circuit breaker 1 is placed at an appropriate position on the mounting plate 2 by engaging the restricting portions 204 and 205 with the engaging piece 108 (not shown) of the circuit breaker 1. Then, by pressing down the external knob 1042 of the lock lever 1041 in the direction of the mounting plate 2, the lock lever 1041 protrudes from the bottom surface of the circuit breaker 1 and fits into the recess that is the second restricting portion 206 of the mounting plate 2. Installation is complete.

When removing the circuit breaker 1 from the mounting plate 2, the external knob 1042 of the lock lever 1041 is pulled up in the direction opposite to the mounting plate (the front side of the circuit breaker 1), and the lock lever 1042 does not protrude from the bottom surface. In this state, the circuit breaker 1 is moved so as to be pulled out to the rear side, so that the engagement between the first restricting portions 104 and 205 and the circuit breaker is released and at the same time the connection between the bus bar and the power supply side terminal is released. The removal is completed.

As shown in FIG. 2, in the body 101 of the circuit breaker 1, a recess 1021 into which the CT output signal lead wire 110 is fitted is formed on the side surface from the front side to the bottom side of the body. The size of the recess 1021 is formed to have a width in the front-rear direction and a depth in the side direction so that the CT output signal lead-out line 110 is fitted. In addition, protrusions 1021a are formed in the concave portion 1021 in places on the side surface side so that the fitted CT output signal lead-out line 110 does not easily float. It is possible to restrict the CT output signal lead wire 110 from being caught by these protrusions 1021a and being swelled in the juxtaposition direction or protruding.

(Second Embodiment)
FIG. 5 shows an external perspective view of the circuit breaker 1 having a storage portion for the CT output signal lead line in the present invention. FIG. 6 is an enlarged view of a main part of the storage part of the CT output signal lead line of the circuit breaker 1. In the second embodiment, instead of the concave portion provided on the side surface of the vessel body, a CT output signal lead wire storage portion is provided in the external knob 1042 portion of the lock lever 1041.

In this embodiment, the concave portion on the side surface of the body is not formed, and the CT output signal lead wire 110 that opens a part of the back side of the circuit breaker is passed through the external knob 1042 of the lock lever 1041. By forming the portion 10421, a storage portion for the CT output signal lead line is configured. The through-hole 10421 has a hole penetrating from the front side to the bottom side, and an opening 10422 is provided in a part on the back side so that the CT output signal lead wire 110 can be passed through the hole. It has a different shape. The opening 10422 is preferably configured to be substantially the same as or slightly narrower than the diameter of the CT output signal lead line so that the CT output signal lead line can be pushed into the hole.

When the CT output signal lead line 110 is passed through the through-hole 10421, the CT output signal lead line 110 is passed through the hole so as to be pushed from the opening 10422 toward the hole. Since the size of the hole portion is set to have a slight margin with respect to the diameter of the CT output signal lead wire 110, the lock lever 1041 is displaced in the direction of the front surface to the bottom surface by operating the lock lever 1041. However, the CT output signal lead line 110 is not affected.

In the case where the CT output signal lead wire 110 is grasped by the hole portion with the hole portion having a size substantially the same as the diameter of the CT output signal lead wire 110, the CT output signal lead wire 110 is preliminarily configured. It is preferable to provide a configuration with a margin of length corresponding to the amount of displacement of the lock lever 1041.

Further, when the connector 110 is connected after the CT output signal lead wire 110 is passed through the through portion, only the hole portion 10421 may be formed without providing the opening portion 10421.

Further, when the load-side electric wires are densely packed or when it is not desired to make contact with the load-side electric wires as much as possible, the first embodiment is provided as a mode in which the storage portion of the CT output signal lead wire can be selectively used. The circuit breaker 1 is configured by forming together a CT output signal lead-out line storage portion formed by a recess provided on the side surface and a CT output signal lead-out line storage portion provided through the lock lever portion of the present embodiment. May be.

(Third embodiment)
FIG. 7 shows an external perspective view of the circuit breaker 1 provided with the CT output signal lead wire storage portion in the present invention. FIG. 8 is an enlarged view of the main part of the storage part of the CT output signal lead line of the circuit breaker 1. In the third embodiment, instead of the through portion in the second embodiment, an extension portion that is formed integrally with the lock lever 1041 and extends from the lock lever is provided on the front side of the container body. In this configuration, a circuit breaker including the configured safety device 104 is provided with a through portion through which a CT output signal lead line passes.

The safety device 104 is formed integrally with the lock lever 1041 in a cylindrical shape. The safety device 104 includes an extension portion 1043 extending from the lock lever from the bottom surface side to the front surface side of the circuit breaker, and a display portion 1044 provided at an end portion of the extension portion. The display unit 1044 is interlocked according to the lever up / down operation, and the up / down state of the lock lever can be easily discriminated from the front side of the circuit breaker.

Further, a pressing portion 1045 is formed at the front side end portion of the display portion 1044. When the lock lever is lowered, the pressing operation can also be performed by pressing the pressing portion 1045.

A sliding portion 1048 is formed in the extending portion 1043 by digging a part of the meat of the extending portion. The sliding portion 1048 is supported by a safety device support portion 1021 formed on the housing side and a support portion 1011 on the housing 101 side provided to face the support portion 1021, and guide guides when the lock lever is raised and lowered. It plays a role.

The display unit 1044 is for easily seeing the up / down state of the lock lever 1041 from the front side of the circuit breaker. When the lock lever is lowered, the display portion 1044 has the same height as the support portion 1021 and is not visible from the front side. When the lock lever is raised, the display portion 1044 of FIG. As can be seen from the front side of the circuit breaker.

The storage section of the CT output signal lead wire provided in the safety device 104 is configured by providing a through portion 10431 through which the CT output signal lead wire passes from the front side to the bottom side of the circuit breaker. A part of the back side of the through portion 10431 is opened, and a CT output signal lead line is passed through the opening 10432 so as to be pushed into the through portion 10431. The opening 10432 may be configured to be substantially the same as or slightly narrower than the diameter of the CT output signal lead line so that the CT output signal lead line can be pushed into the hole.

Note that a slit-shaped notch 10433 is provided in a part of the passage portion 10431 on the front surface side of the extension portion 1043 and on the rear surface side of the circuit breaker, and the bottom surface of the slit when the safety device is lifted. And the front side of the circuit breaker 1 are provided so as to substantially coincide with each other. This serves as a guide when the CT output signal lead wire drawn out from the back side of the circuit breaker 1 is drawn into the through portion 10431 and can be easily drawn into the through portion. In this case, it is possible to prevent unnecessary stress from being applied to the CT output signal lead line by pulling the CT output signal lead line.

As a result, the CT output signal lead-out line is housed inside the safety device, so that the amount of exposure of the CT output signal lead-out line to the outside of the device is reduced, and the CT output when the circuit breaker 1 is juxtaposed with the device is arranged. It is possible to provide a storage structure for a CT output signal lead line that can be regulated so that the signal lead line does not float or swell in the direction in which the body is juxtaposed, and has a better appearance.

Similarly to the second embodiment, when the load-side electric wires are densely packed or when it is not desired to make contact with the load-side electric wires as much as possible, the CT output signal lead-out housing is selectively used. As a possible form, the CT output signal lead line storage part by the concave part provided in the side surface of the first embodiment and the CT output signal lead line storage part by the through part provided in the lock lever part of the present embodiment are combined. The circuit breaker 1 may be configured by forming.

FIG. 9 shows a diagram in which the circuit breaker 1 according to the third embodiment is placed side by side on the mounting plate. The CT output signal lead-out line 110 is passed through the passage part 10431 of the safety device 104 which is a storage part of the CT output signal lead-out line provided in the center part on the back side of the circuit breaker 1, and It is led to the back surface of the mounting plate 2 in an orderly manner without swelling or protruding to the side surface side. For this reason, it does not hinder the wiring of the load side electric wire (not shown), and the CT output signal lead line can be wired without being mixed with the load side electric wire, thereby improving the wiring workability.

The extension 1043 in the safety device 104 also has an action as an insulating wall for making it difficult for the load-side electric wires inserted into the electric wire insertion holes to come into contact with each other. There is an effect of preventing contact with the side electric wires.

In addition, this invention is not limited to the said embodiment, A various change is possible in the range which does not deviate from the summary of this invention.

For example, according to the arrangement position of the CT output signal lead line drawn out from the back side of the circuit breaker 1, the outer side of the front side of the vessel bodies 101 and 102 is dug up to the through portion provided in the safety device. A recess may be formed and a CT output signal lead line storage section may be provided also on the front side of the circuit breaker to reduce exposure of the CT output signal lead line on the front side of the circuit breaker.

Further, a hook for hooking a CT output signal lead wire is provided at the center of the front side and the back side of the body of the circuit breaker, and the CT output signal lead wire is hooked on the hook, so that it bulges or protrudes to the side surface side. You may comprise so that it may regulate. The effects similar to those of the embodiment can be obtained by these changes.

DESCRIPTION OF SYMBOLS 1 Circuit breaker 101 Case 102 Case 1021 Recess 1021a Protrusion part 1012 Support part 1022 Support part 103 Operation handle 104 Safety device 1041 Lock lever 1042 External knob 10421 Through part 10422 Opening part 10431 Extension part 10431 Through part 10432 Opening part 1044 Display portion 1045 Pressing portion 1048 Sliding portion 105 Electric wire insertion hole 106 Electric wire insertion hole 107 Recess 108 Engagement portion 2 Mounting plate 201 Bus bar 202 Bus bar 203 Bus bar 204 First regulating unit 205 First regulating unit 206 Second regulating unit

Claims (4)

A CT output signal in which a current transformer (CT) in which a main circuit conductive portion connecting between a power supply side terminal and a load side terminal is inserted is disposed inside the device body, and an output signal of the CT is extracted to the outside of the device body In the circuit breaker provided so that the lead wire is drawn out from the load side terminal side of the body to the outside of the body,
When arranging a plurality of the circuit breakers in parallel,
A CT output signal lead-out line for a circuit breaker comprising: a CT output signal lead-out line storing part for storing a CT output signal lead-out line so that the CT output signal lead-out line does not protrude in the direction of parallel arrangement of the body Construction. The storage part of the CT output signal lead line is
The direction in which the circuit breaker bodies are arranged side by side is the side surface, and the side of the circuit breaker body on which the handle for operating the circuit breaker is provided is attached to the front side and the circuit breaker mounting plate. When the side is the bottom side,
2. The storage of the CT output signal lead-out line of the circuit breaker according to claim 1, wherein a recess for fitting the CT output signal lead-out line is provided on the side face of the container from the front side to the bottom side of the container. Construction. The storage part of the CT output signal lead line is
2. The circuit breaker according to claim 1, wherein a passage portion through which a CT output signal lead wire, which is partially opened, passes is provided in a lock lever for mounting and fixing the circuit breaker on the inner bottom of the distribution board. CT output signal lead wire storage structure. The storage part of the CT output signal lead line is
A safety unit that is formed integrally with a lock lever for mounting and fixing the circuit breaker on the inner bottom of the distribution board, and includes an extending portion that extends from the lock lever on the front side of the device body. 2. A storage structure for a CT output signal lead line of a circuit breaker according to claim 1, wherein a passage portion through which a CT output signal lead line passes is provided in the apparatus from the front side to the bottom side.

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