JP2020188667A - Electric wire connection apparatus - Google Patents

Abstract

To provide an electric wire connection apparatus that functions even as a switch by storing an electric conductor for connection and a relay compactly in a limited space of a case of the electric wire connection apparatus.SOLUTION: First and second relays 13, 15 are arranged side by side in an insulation case body 3 on a second conductor 7 for connection in a direction in which the second conductor 7 for connection extends orthogonally a width direction. Further, structures of first and third conductors 5A, 5B and 9A, 9B for connection, widths of main body parts of first and second relays 13, 15, and fitting positions of pairs of first and second terminals 13B, 13C and 15B, 15C for connection are so defined that while the pair of first terminals 13B, 13C for connection are connected to the first conductors 5A, 5B for connection and the pair of second terminals 15B, 15C for connection are connected to the third conductors 9A, 9B, the first relay 13 is supported by the first conductors 5A, 5B for connection, and the second relay 15 is supported by the third conductors 9A, 9B for connection.SELECTED DRAWING: Figure 2

Description

The present invention relates to an electric wire connection device installed in place of a current limiter in a distribution board.

Generally, smart meters have a built-in current limiting function. Therefore, when replacing the conventional watt-hour meter with a smart meter, it is also necessary to remove the current limiter (also called "ampere breaker" or "service breaker") installed in the distribution board. It has been. However, even after removing the current limiter, it is necessary to connect the electric wire connected to the current limiter. Therefore, conventionally, the "breaker space connecting device" (hereinafter, "electric wire connecting device") described in Non-Patent Document 1 has been installed to electrically connect the electric wires (Non-Patent Document 1).

Toho Electric Co., Ltd. "Breaker Space Connection Equipment" [Searched on February 20, 2019] Internet <URL: http://www.tohodenki.co.jp/item/1.html>

Since the purpose of the electric wire connecting device described in Non-Patent Document 1 is only to electrically connect the electric wires after removing the current limiter, no member other than the conductor connecting the electric wires is housed.

An object of the present invention is to provide an electric wire connecting device that compactly stores a connecting conductor and a relay in a limited space of a case of an electric wire connecting device that can be stored in a distribution board and also functions as a switch. That is.

Another object of the present invention is to provide an electric wire connecting device having an additional function such as a seismic sensing function.

The present invention is installed at the position where the current limiter was installed in the single-phase three-wire distribution board, and has three primary electric wires including a neutral wire and three secondary electric wires including a neutral wire. The target of improvement is an electric wire connecting device provided with first to third connecting conductors for connecting side electric wires to each other.

The electric current connection device of the present invention has a one-sided opening-like insulation in which the first to third connecting conductors are housed in a state where the second connecting conductor to which the neutral wire is connected is in the center and the first to third connecting conductors are arranged in the width direction. A first relay that includes a case body and a pair of first connection terminals extending from the body, is connected in the middle of the first connection conductor, and cuts off the current flowing through the first connection conductor. A second relay, which is provided with a pair of second connection terminals extending from the main body, is connected in the middle of the third connection conductor, and cuts off the current flowing through the third connection conductor, and the first And a control board provided with a control circuit for controlling the opening and closing of the second relay, the first and second relays are placed on the second connecting conductor at the second orthogonal to the width direction. The connecting conductors are arranged side by side in the extending direction.

Then, the structure of the first connecting conductor, the structure of the third connecting conductor, the width dimension of the main body of the first and second relays, the mounting position of the pair of first connecting terminals, and the pair of second relays. The mounting position of the connection terminal is such that the pair of first connection terminals is connected to the first connection conductor and the pair of second connection terminals are connected to the third connection conductor. It is defined that the first relay is supported by the first connecting conductor and the second relay is supported by the third connecting conductor.

Because of this configuration, the first to third connecting conductors, the first and second relays, and the control board can be compactly stored in the limited space of the insulating case body, and the wires can be connected. The device can function as a switch.

The first relay and the second relay preferably have the same shape. In this way, it is possible to reduce the types of relays used and reduce costs. In this case, if the pair of first connection terminals of the first relay and the pair of second connection terminals of the second relay are arranged side by side so as to extend in opposite directions, the insulation is more compact. It can be stored inside the case body.

An intermediate guide member formed of an electrically insulating material and forming an insulating wall portion between the control board and the first relay and the second relay is further arranged on the first relay and the second relay. The control board may be held on the intermediate guide member. If such an intermediate guide member is provided, the control board can be electrically insulated from the first and second relays, and the control board can be electrically protected. In addition, the intermediate guide member can also position the first and second relays.

In the event of a short-circuit accident or the like, a large current that temporarily exceeds the allowable current of the relay may flow through the distribution board. During this time, when the first and second relays are operated to cut off the current, the contacts are melted by the arc generated at the moment when the contacts in the first and second relays are opened, and the first and second relays are melted. There is a risk that the relay will break down. Therefore, in the present invention, a first magnetic core having a conductor through hole through which the first connecting conductor or the first connecting terminal penetrates in the central portion, and a change in the magnetic current flowing through the first magnetic core. A first current sensor including a first magnetic sensor element that measures the current flowing through the first connecting conductor based on the amount, and a third connecting conductor or a second connecting terminal penetrate through the center. It is provided with a second magnetic core having a conductor through hole to be formed, and a second magnetic sensor element for measuring a current flowing through a third connecting conductor based on a change in magnetic flux flowing through the second magnetic core. It is also preferable to further include a second current sensor so that the current flowing through the connecting conductor can be monitored. In this case, it is preferable that the intermediate guide member is integrally formed with the first and second magnetic core holding portions that hold the first magnetic core and the second magnetic core. In this way, the positioning of the first and second magnetic cores becomes easy by using the intermediate guide member.

When the first magnetic material core and the second magnetic material core each have a gap in a part of the magnetic path and the magnetic sensor element is arranged between them, the intermediate guide member has a first The first and second insertion holes facing the gap between the first magnetic core and the second magnetic core held in the second magnetic core holding portion are formed, and the first magnetic sensor is formed. The element and the second magnetic sensor element have first and second insertion holes in a state where the first magnetic core and the second magnetic core are held by the first and second magnetic core holding portions. It is preferably mounted on the control board so that it is located in the gap through. In this way, the intermediate guide member facilitates the positioning of the first and second magnetic sensor elements.

When the first and second current sensors are provided in this way, the control circuit is provided with the first and second current sensors only when the current detected by the first and second current sensors is equal to or less than a predetermined value. It is preferable that the control signal for opening the second relay can be output.

Various controls can be considered for opening and closing the first and second relays by the control circuit. For example, a vibration sensor for detecting vibration applied to the main body of the insulating case is provided, and the control circuit outputs a control signal for opening the first and second relays when the vibration sensor detects vibration of a predetermined value or more. You may try to do it. In this way, when vibration is detected due to an earthquake or the like, the first and second relays can be operated to cut off the current. Further, for example, a temperature sensor or a humidity sensor may be provided to output a control signal when a predetermined temperature or humidity is reached. In addition, a communication function may be added so that a control signal can be output remotely as needed.

The connection method between the primary side electric wire and the secondary side electric wire and the first to third connection conductors is arbitrary, but if they can be connected by the same connection method as the current limiter originally installed in the distribution board, the connection can be made. It's easy. Therefore, it is preferable that each end of the first to third connecting conductors of the electric wire connecting device of the present invention is provided with a tubular connecting terminal of the same type as the current limiter using a set screw. In this way, the primary side electric wire and the secondary side electric wire can be inserted into the tubular connection terminal and tightened with a set screw to be electrically connected to the first to third connecting conductors.

The present invention is the first and the first which is installed at the position where the current limiter was installed in the single-phase two-wire type distribution board and connects two primary side electric wires and two secondary side electric wires to each other. It can also be applied to electric wire connection equipment provided with a second connecting conductor. In this case, the electric wire connecting device of the present invention includes a one-sided opening-shaped insulating case main body in which the first and second connecting conductors are housed in a state of being arranged in the width direction, and a pair of first one extending from the main body portion. A first relay having a connection terminal, which is connected in the middle of the first connection conductor and cuts off the current flowing through the first connection conductor, and a pair of second connection terminals extending from the main body. A second relay that is connected in the middle of the second connecting conductor and cuts off the current flowing through the second connecting conductor, and a control circuit that controls the opening and closing of the first and second relays. The first and second relays are arranged side by side in the direction in which the first and second connecting conductors extend between the first and second connecting conductors, and the first and second relays are arranged side by side. The structure of the connecting conductor, the structure of the second connecting conductor, the width dimension of the main body of the first and second relays, the mounting position of the pair of first connecting terminals, and the pair of second connecting terminals. The mounting position is such that the pair of first connection terminals is connected to the first connection conductor and the pair of second connection terminals are connected to the second connection conductor, and the first relay is It is defined to be supported by a first connecting conductor and a second relay supported by a second connecting conductor.

Even in this case, it is needless to say that the other features described above for the electric wire connection device for the single-phase three-wire distribution board may be provided.

It is a schematic diagram which showed the process of installing the electric wire connection device of this invention in a single-phase three-wire type distribution board. It is an exploded perspective view of the electric wire connection device 1. It is a figure which shows the state which the connection conductor and a relay are housed in the insulation case body. It is a partially enlarged view which shows the magnetic core holding part formed in the intermediate guide member. It is a partially enlarged sectional view which shows the fitting state of an intermediate guide member and a magnetic core. It is a partially enlarged sectional view which shows the arrangement state of a magnetic sensor element. It is a flowchart which shows an example of the control by the control circuit of a control board.

Hereinafter, embodiments of the electric wire connection device of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a schematic diagram for explaining a process in which the electric wire connecting device 1 according to the embodiment of the present invention is installed in a single-phase three-wire distribution board DB. A current limiter AB, a main switch MS, and a branch switch BS are mainly arranged in the distribution board DB. As explained in the background technology, when the integrated watt-hour meter is replaced with a smart meter, the primary side electric wires PC1 to PC3 and the secondary side electric wires SC1 to are connected to the current limiter AB installed in the distribution board DB. The SC3 is removed and the current limiter AB is removed ((1) in FIG. 1). After that, the electric wire connection device 1 of the present embodiment is installed at the position where the current limiter AB is installed ((2) in FIG. 1), and the primary side electric wires PC1 to PC3 and the secondary side electric wires SC1 to SC3 are connected. Connecting.

FIG. 2 is an exploded perspective view of the electric wire connecting device 1 of the present embodiment, and FIG. 3 is a diagram showing a state in which the connecting conductors 5, 7, and 9 and the relays 13 and 15 are housed in the insulating case main body 3. is there. In FIG. 3, the insulating case main body 3, the first to third connecting conductors 5, 7, 9, the first relay 13, the second relay 15, the first magnetic core 17, the second magnetic material. The members other than the core 19 are not shown. Further, FIG. 4 is a partially enlarged view showing a magnetic core holding portion (35, 37) formed on the intermediate guide member 21, and FIG. 5 is a partially enlarged view of the intermediate guide member 21 and the magnetic core (17, 19). It is a partially enlarged cross-sectional view which shows the fitting state of, and FIG. 6 is a partially enlarged sectional view which shows the arrangement state of the magnetic sensor element (31, 33). In FIG. 6, elements mounted on the control board 23 and the like are omitted except for the magnetic sensor element.

The electric wire connecting device 1 of the present embodiment is an electric wire connecting device 1 having a vibration sensor and having a seismic function. The electric wire connection device 1 mainly includes an insulating case main body 3, first to third connection conductors 5 (5A and 5B), 7, 9 (9A and 9B), and a terminal ring (tubular connection terminal) 11 (). 11A to 11F), the first relay 13, the second relay 15, the first magnetic core 17, the second magnetic core 19, the intermediate guide member 21, the control board 23, and the feeling. It is composed of a seismic substrate 25 and cover members 27, 29 (29A and 29B).

[Insulation case body]
As shown in FIGS. 2 and 3, the insulating case body 3 integrally molded with the insulating resin has a one-sided opening shape, and the copper second connecting conductor 7 to which the neutral wire (not shown) is connected is in the center. The first connecting conductors 5 (5A and 5B) are arranged on the left side, and the third connecting conductors 9 (9A and 9B) are arranged on the right side in the width direction. Terminal rings 11A to 11F provided with set screws for fixing the electric wire are provided at both ends of the first to third connecting conductors 5, 7, and 9. The terminal rings 11A to 11F are of the same type as those used for the current limiter AB. The first connecting conductor 5 is composed of a copper connecting conductor piece 5A and a connecting conductor piece 5B, and the third connecting conductor 9 is a copper connecting conductor piece. It is composed of two parts, 9A and a connecting conductor piece 9B.

The pair of side wall portions 31 and 32 facing in the longitudinal direction of the insulating case main body 3 are formed with electric wire insertion holes 3A to 3F at positions consistent with the openings of the inserted terminal rings 11A to 11F. Three secondary side electric wires SC1 to SC3 are inserted into the electric wire insertion holes 3A to 3C, and three primary side electric wires PC1 to PC3 are inserted into the electric wire insertion holes 3D to 3F, and terminal rings 11A to 11F. It is fixed by tightening with the set screw. Further, in the bottom wall portion 34 of the insulating case main body 3, screws 4A and 4B for fixing the cover member 27 integrally molded with the insulating resin are formed through holes 3G and 3H extending from the outside of the bottom wall portion 34. Screw holes 3J and 3K are formed in which screws 30A and 30B for fixing the cover members 29A and 29B integrally molded by the insulating resin are screwed. Further, the bottom wall portion 34 is formed with terminal fitting portions 34A to 34F to which the terminal rings 11A to 11F are fitted together at both ends of the insulating case 3 in the longitudinal direction.

[relay]
The first relay 13 includes a pair of first connection terminals 13B and 13C extending from the relay main body 13A, is connected to the first connection conductor pieces 5A and 5B, and is connected to the first connection conductor pieces 5A and 5B. Shut off the current flowing through. The pair of first connection terminals 13B, 13C are provided integrally with the pair of parallel portions 13B1, 13C1 extending in parallel and the pair of parallel portions 13B1, 13C1, and are orthogonal to the parallel portions 13B1, 13C1 in opposite directions. It is composed of orthogonal portions 13B2 and 13C2 extending to. The pair of first connection terminals 13B, 13C orthogonal portions 13B2, 13C2 and the first connection conductor pieces 5A, 5B have protrusions provided on the connection conductors 5A, 5B on the connection terminals 13B, 13C. It is connected by inserting it into the provided hole and crushing and caulking the protrusions of the connecting conductors 5A and 5B. The second relay 15 includes a pair of second connection terminals 15B and 15C extending from the relay main body 15A, and is connected to the third connection conductors 9A and 9B to connect the third connection conductor 9. Cut off the flowing current. The pair of second connection terminals 15B, 15C are provided integrally with the pair of parallel portions 15B1, 15C1 extending in parallel and the pair of parallel portions 15B1, 15C1 and are orthogonal to the parallel portions 15B1, 15C1 in opposite directions. It is composed of orthogonal portions 15B2 and 15C2 extending to. The orthogonal portions 15B2 and 15C2 of the pair of second connection terminals 15B and 15C and the third connection conductors 9A and 9B are provided with protrusions provided on the connection conductors 9A and 9B at the connection terminals 15B and 15C. It is connected by inserting it into the hole and crushing and crimping the protrusions of the connecting conductors 9A and 9B.

A notch recess 13D for fitting the first magnetic core 17 is formed in the orthogonal portion 13B2 of the first connection terminal 13B, and the orthogonal portion 15B2 of the second connection terminal 15B is formed. , A notch recess 15D for fitting the second magnetic core 19 is formed.

In the present embodiment, the first relay 13 and the second relay 15, and the first connecting conductors 5 (5A and 5B) and the third connecting conductor 9 (9A and 9B) have the same shape. I am using something. Then, the first relay 13 and the second relay 15 are arranged in the insulating case main body 3 in the direction in which the second connecting conductor 7 extends on the second connecting conductor 7 at right angles to the width direction. It is arranged in. Further, the structure of the first connecting conductor pieces 5A and 5B, the structure of the third connecting conductor pieces 9A and 9B, the width dimensions of the main bodies 13A and 15A of the first and second relays 13 and 15, and a pair. The mounting positions of the first connection terminals 13B and 13C and the mounting positions of the pair of second connection terminals 15B and 15C are such that the pair of first connection terminals 13B and 13C are the first connection conductor pieces 5A. The first relay 13 is connected to the first connecting conductor pieces 5A and 5B while being connected to 5B and the pair of second connecting terminals 15B and 15C are connected to the third connecting conductor pieces 9A and 9B. The second relay 15 is defined to be supported by the third connecting conductor pieces 9A, 9B. The pair of first connection terminals 13B and 13C of the first relay 13 and the pair of second connection terminals 15B and 15C of the second relay 15 are arranged side by side so as to extend in opposite directions. There is.

The first relay 13 and the second relay 15 are connected to the control board 23 by a lead wire (not shown) to obtain the electric power and the control signal required for operation.

[Magnetic core]
As shown in FIGS. 2, 5 and 6, the U-shaped first magnetic core 17 has a connecting portion 17c that connects a pair of columnar portions 17a and 17b and one ends of the pair of columnar portions 17a and 17b. A conductor through hole 17A through which the orthogonal portion 13B2 of the first connection terminal 13B penetrates is provided in the central portion, and a gap 17B is provided between the free ends of the pair of columnar portions 17a and 17b. The U-shaped second magnetic core 19 is composed of a pair of columnar portions 19a and 19b and a connecting portion 19c that connects one ends of the pair of columnar portions 19a and 19b, and has a second connection terminal at the center. It has a conductor through hole 19A through which the orthogonal portion 15B2 of 15B penetrates, and has a gap 19B between the free ends of the pair of columnar portions 19a and 19b. As will be described later, the first magnetic core 17 and the second magnetic core 19 are positioned by the intermediate guide member 21.

[Control board]
The control board 23 includes a control circuit that controls the opening and closing of the first and second relays 13 and 15. Further, in the present embodiment, the first magnetic sensor element 31 and the second magnetic sensor element 33 constituting the current sensor for monitoring the current flowing through the conductor are arranged on the back surface side of the control board 23. The terminals of the magnetic sensor element 31 of 1 and the terminals of the second magnetic sensor element 33 penetrate the control board 23 and are connected to the control circuit. The control board 23 is connected to the connection terminal 13C of the first relay 13 and the second connection conductor 7 (neutral wire) or the connection terminal 15C of the second relay 15 and the second connection by a lead wire (not shown). It is connected to the conductor 7 (neutral wire) and obtains the power required for operation.

[Intermediate guide member]
The intermediate guide member 21 is made of an electrically insulating material (for example, an insulating resin) and is arranged on the first relay 13 and the second relay 15. A control board 23 is held on the intermediate guide member 21, and an insulating wall portion is formed between the control board 23 and the first relay 13 and the second relay 15 by the intermediate guide member 21. .. A pair of columnar portions 17a and 17b of the first and second magnetic cores 17 and 19 and tip portions of 19a and 19b are fitted and held in the intermediate guide member 21, first and second magnetic materials. The core holding portions 35 and 37 and the first and second insertion holes 39 and 41 into which the first and second magnetic sensor elements 31 and 33 are inserted are formed.

As shown in FIG. 4, the first magnetic core holding portion 35 has a shape in which the first magnetic core 17 is inserted from the back surface side of the intermediate guide member 21, and is formed from the back surface side of the intermediate guide member 21. It is formed between a pair of facing wall portions 35A and 35B extending in the longitudinal direction of the insulating case body 3 and a pair of facing wall portions 35A and 35B, and is arranged in the gap 17B of the first magnetic core 17. It is provided with an intermediate wall portion 35C. The facing wall portion 35A has a pair of contact portions forming a top portion with which the tips of the pair of columnar portions 17a and 17b of the first magnetic core 17 inserted into the first magnetic core holding portion 35 abut. 35A1 and 35A2 are formed, and a pair of claw-shaped portions 35B1 and 35B2 that push the side portions of the pair of columnar portions 17a and 17b of the first magnetic core 17 are formed on the facing wall portion 35B. .. The first insertion hole 39 is a bottomed hole formed in the intermediate wall portion 35C.

As shown in FIG. 5, the first magnetic core 17 is positioned by inserting the first magnetic core 17 into the first magnetic core holding portion 35 from the back surface side of the intermediate guide member 21. Further, as shown in FIG. 6, by fixing the control board 23 to the intermediate guide member 21, the first magnetic sensor element 31 is inserted into the first insertion hole 39, and the first magnetic core 17 is inserted. It is positioned so that it is located within the gap 17B. The second magnetic core holding portion 37 is configured in the same manner as the first magnetic core holding portion 35, and the second magnetic core 19 and the second magnetic sensor element 33 are also positioned in the same manner. Therefore, reference numerals are given in parentheses in the drawings of FIGS. 4 to 6 to omit the description.

Fixing holes 21A and 21B are formed in the intermediate guide member 21 at positions consistent with the through holes 3G and 3H of the insulating case body 3, and the intermediate guide member 21 is provided with the cover member 27 together with the insulating case by the screws 4A and 4B. It is fixed to the main body 3.

[Current sensor]
As described above, the first magnetic sensor element 17 and the first magnetic sensor element 31 are arranged to form the first current sensor. The first current sensor measures the current flowing through the first connecting conductor based on the amount of change in the magnetic flux flowing through the first magnetic core 17. Similarly, the second magnetic sensor element 19 and the second magnetic sensor element 33 are arranged to form the second current sensor. The second current sensor measures the current flowing through the third connecting conductor based on the amount of change in the magnetic flux flowing through the second magnetic core 19.

[Seismic board]
The seismic sensor board 25 is fixed on a spacer 24 arranged on the control board 23, and includes a vibration sensor that detects vibration applied to the insulating case main body 3. The seismic sensor board 25 is electrically connected to the control board 23, and the control circuit outputs a control signal for opening the first and second relays 13 and 15 when the vibration sensor detects vibration of a predetermined value or more. It is designed to do.

[Cover member]
The cover members 27, 29A, and 29B are cover members of the insulating case main body 3. The cover member 27 is covered from the seismic substrate 25 and fixed to the insulating case body 3 with screws 4A and 4B through which through holes 3G and 3H are passed from the outside of the bottom of the insulating case body 3. The cover member 29A is fixed to the screw hole 3J with a screw 30A. Similarly, the cover member 29B is fixed to the screw hole 3K with a screw 30B.

<Control flow>
The control circuit of the control board 23 operates according to the flowchart of FIG.

The control circuit monitors the vibration detected by the vibration sensor (step ST1). When the vibration sensor detects vibration of a predetermined value or more (for example, equivalent to a seismic intensity of 5 or higher), the control circuit confirms the current values of the first and second current sensors (step ST2). Only when the current value is a predetermined value (for example, 90A) or less, a control signal for opening the relay is output to the first and second relays 13 and 15 (step ST3). As a result, in the event of an earthquake, the current can be safely cut off without breaking the relay.

The above-described embodiment is described as an example, and the present invention is not limited to the present embodiment as long as it does not deviate from the gist thereof. For example, in the above example, the seismic sensor board is provided, but in addition to or instead of this, a temperature sensor and a humidity sensor are provided, and when the temperature and humidity reach a predetermined level, The control signal may be output. In addition, a communication function may be added and a control signal may be output remotely if necessary.

Further, in the above example, the case for a single-phase three-wire distribution board is taken as an example, but it is installed at the position where the current limiter was installed in the single-phase two-wire distribution board, and two primary wires are installed. It is also applicable to electric wire connection equipment provided with first and second connecting conductors for connecting the side electric wire and the two secondary side electric wires to each other. In this case, the configuration is such that the second connecting conductor 7 connected to the neutral wire is excluded.

According to the present invention, there is provided an electric wire connecting device that compactly stores a connecting conductor and a relay in a limited space of a case of an electric wire connecting device that can be stored in a distribution board and also functions as a switch. be able to. Further, according to the present invention, it is possible to provide an electric wire connecting device having an additional function such as a seismic sensing function.

1 Wire connection device 3 Insulation case body 3A to 3F Wire insertion hole 3G, 3H Through hole 3J, 3K Screw hole 31, 32 Side wall part 34 Bottom wall part 34A to 34F Terminal fitting part 4A, 4B Screw 5 For the first connection Conductors 5A, 5B 1st connection conductor piece 7 2nd connection conductor 9 3rd connection conductor 9A, 9B 3rd connection conductor piece 11 (11A to 11F) Terminal ring (tubular connection terminal)
13 First relay 13A Relay body 13B, 13C Pair of first connection terminals 13D Notch recess 15 Second relay 15A Relay body 15B, 15C Pair of second connection terminals 15D Notch recess 17 First 1 magnetic core 17A conductor through hole 17B gap 19 second magnetic core 19A conductor through hole 19B gap 21 intermediate guide members 21A, 21B fixing hole 35 first magnetic core holding part 37 second magnetic core holding Part 39 First insertion hole 41 Second insertion hole 23 Control board 31 First magnetic sensor element 33 Second magnetic sensor element 24 Spacer 25 Seismic device 27 Cover member 29A, 29B Cover member 30A, 30B Screw

Claims (9)

It is installed at the position where the current limiter was installed in the single-phase three-wire distribution board, and the three primary side wires including the neutral wire and the three secondary side wires including the neutral wire are mutually connected. An electric wire connecting device provided with first to third connecting conductors to be connected to.
A one-sided opening-shaped insulating case body in which the first to third connecting conductors are housed in a state in which the first to third connecting conductors are arranged in the width direction with the second connecting conductor to which the neutral wire is connected is in the center.
A first relay having a pair of first connection terminals extending from the main body, connected in the middle of the first connection conductor, and blocking a current flowing through the first connection conductor.
A second relay having a pair of second connection terminals extending from the main body, connected in the middle of the third connection conductor, and blocking the current flowing through the third connection conductor,
A control board provided with a control circuit for controlling the opening and closing of the first and second relays is provided.
The first and second relays are arranged on the second connecting conductor side by side in a direction in which the second connecting conductor extends orthogonal to the width direction.
The structure of the first connecting conductor, the structure of the third connecting conductor, the width dimension of the main body of the first and second relays, the mounting position of the pair of first connecting terminals, and the above. As for the mounting positions of the pair of second connection terminals, the pair of first connection terminals are connected to the first connection conductor, and the pair of second connection terminals are for the third connection. It is defined that the first relay is supported by the first connecting conductor and the second relay is supported by the third connecting conductor in a state of being connected to the conductor. Characterized wire connection equipment. The first relay and the second relay have the same shape and have the same shape.
1. Claim 1 in which the pair of first connection terminals of the first relay and the pair of second connection terminals of the second relay are arranged side by side so as to extend in opposite directions. Wire connection equipment described in. An intermediate guide formed of an electrically insulating material on the first relay and the second relay to form an insulating wall portion between the control board and the first relay and the second relay. The members are further arranged,
The electric wire connection device according to claim 2, wherein the control board is held on the intermediate guide member. Based on the first magnetic core having a conductor through hole through which the first connecting conductor or the first connecting terminal penetrates in the central portion, and the amount of change in the magnetic flux flowing through the first magnetic core. A first current sensor including a first magnetic sensor element for measuring the current flowing through the first connecting conductor, and a first current sensor.
Based on a second magnetic core having a conductor through hole through which the third connecting conductor or the second connecting terminal penetrates in the central portion, and the amount of change in magnetic flux flowing through the second magnetic core. Further including a second current sensor including a second magnetic sensor element for measuring the current flowing through the third connecting conductor.
The intermediate guide member is characterized in that a first magnetic core and a first and second magnetic core holding portions for holding the second magnetic core are integrally formed in the intermediate guide member. The electric wire connection device according to 3. The first magnetic core and the second magnetic core each have a gap in a part of the magnetic path.
The intermediate guide member includes the first and second magnetic cores held by the first and second magnetic core holding portions and the first and second magnetic cores facing the gaps of the second magnetic core. An insertion hole is formed
The first magnetic sensor element and the second magnetic sensor element are in a state in which the first magnetic core and the second magnetic core are held by the first and second magnetic core holding portions. The electric wire connection device according to claim 4, which is mounted on the control board so as to be located in the gap through the first and second insertion holes. The control circuit is configured to be able to output the control signal for opening the first and second relays only when the current detected by the first and second current sensors is equal to or less than a predetermined value. The electric wire connection device according to claim 4. It is further equipped with a vibration sensor that detects the vibration applied to the insulating case body.
The electric wire according to any one of claims 1 to 6, wherein the control circuit outputs the control signal that opens the first and second relays when the vibration sensor detects vibration of a predetermined value or more. Connected device. Each end of the first to third connecting conductors is provided with a tubular connection terminal of the same type as the current limiter with a set screw.
The first aspect of claim 1, wherein the primary side electric wire and the secondary side electric wire are inserted into the tubular connection terminal and tightened with the set screw to be electrically connected to the first to third connection conductors. Described wire connection equipment. First and second connections that are installed at the position where the current limiter was installed in the single-phase two-wire distribution board and connect the two primary and two secondary wires to each other. It is an electric wire connection device equipped with a conductor for
A one-sided opening-shaped insulating case body in which the first and second connecting conductors are housed side by side in the width direction, and
A first relay having a pair of first connection terminals extending from the main body, connected in the middle of the first connection conductor, and blocking a current flowing through the first connection conductor.
A second relay having a pair of second connection terminals extending from the main body, connected in the middle of the second connection conductor, and blocking the current flowing through the second connection conductor,
A control board provided with a control circuit for controlling the opening and closing of the first and second relays is provided.
The first and second relays are arranged side by side between the first and second connecting conductors in the direction in which the first and second connecting conductors extend.
The structure of the first connecting conductor, the structure of the second connecting conductor, the width dimension of the main body of the first and second relays, the mounting position of the pair of first connecting terminals, and the above. The mounting positions of the pair of second connection terminals are such that the pair of first connection terminals are connected to the first connection conductor and the pair of second connection terminals are for the second connection. It is defined that the first relay is supported by the first connecting conductor and the second relay is supported by the second connecting conductor in a state of being connected to the conductor. Characterized wire connection equipment.