JP6920095B2 - Electric circuit cutoff device storage box - Google Patents

Description

The present invention relates to an electric circuit cutoff device storage box that is arranged in a main electric circuit on the secondary side of a watt hour meter and houses an electric circuit cutoff device that monitors the electric circuit current and cuts off the electric circuit when a current exceeding the contract current flows.

There is an electric circuit configuration that branches the electric circuit from the watt-hour meter to the distribution board and separately supplies electric power to a specific load such as a charging device for an electric vehicle. For example, in Patent Document 1, a main switch (electric circuit cutoff device) is arranged in the main electric circuit on the secondary side of the watt hour meter, the secondary side is branched and one is connected to the charging device of an electric vehicle, and the other is a house. Connected to the distribution board.

Japanese Patent No. 6087864

With the configuration of Patent Document 1, it is no longer necessary to dispose the power supply line for charging the electric vehicle from the distribution board installed indoors, so that the wiring work can be reduced.
However, as a specific load that is installed outdoors and energized with a relatively large current, there is, for example, a household storage battery other than an electric vehicle, and the configuration of Patent Document 1 cannot cope with these. In addition, when the current used at home approaches or exceeds the contract current due to the energization of such a specific load, preferable control is not performed, so that the main switch may shut off.

Therefore, in view of such a problem, the present invention is installed in the main electric circuit on the secondary side of the watt-hour meter when supplying electric power to a specific load while energizing the distribution board. It is an object of the present invention to provide an electric circuit cutoff device storage box having a function of shutting off when an overcurrent flows in the main electric circuit and a function of controlling so that a current exceeding the contract current does not flow in the main electric circuit.

In order to solve the above problem, the invention of claim 1 is installed in the main electric circuit on the secondary side of the power meter, and has an overcurrent cutoff function that cuts off the main electric circuit when an overcurrent exceeding the contract current flows in the main electric circuit. It is an electric circuit breaker storage box for accommodating the electric circuit breaker equipped with the above. It has a storage unit and an electric circuit cutoff device storage unit at the bottom, and is equipped with an insertion hole for drawing a lead-in wire on the back surface between the two storage units. The electric circuit cutoff device measures the current value of the main electric circuit. After exceeding a certain amount smaller reference current value to the current value contract current, as well as have a current control unit for outputting a control signal for reducing the current supplied to a particular load, adjacent to the path blocking device accommodating portion A space is provided in the part to store the shutoff means for protecting the electric circuit leading to a specific load, and the secondary side terminal of the stored electric circuit cutoff device and the primary side terminal of the stored cutoff means can be connected with a copper bar. It is characterized by having done it .
According to this configuration, when the current flowing in the main circuit on the secondary side of the watt hour meter approaches the contract current value, a control signal for reducing the current is output to a specific load, so this control signal is used for identification. By reducing the load current, it is possible to control the main circuit current so that it does not exceed the contract current.
The electric circuit cutoff device can be protected from rainwater and dust, and can be stored in a space-saving manner by storing it together with the watt-hour meter. Further, since the wiring between the watt hour meter and the electric circuit cutoff device is not exposed, it is aesthetically pleasing.
Furthermore, the earth-leakage circuit breaker placed on the electric circuit to which the specific load is connected is also stored together in the box that houses the electric circuit breaker, so no separate installation space is required, and both are used by the secondary feed copper bar. Because it can be connected, there is no need to route the wiring for connection.
The specific load refers to a load having a relatively large energizing current, such as a charging device for charging an electric vehicle.

The invention of claim 2 is a charging device for an electric vehicle having a function of reducing a current energized by a specific load by an external control signal in the configuration according to claim 1, and the charging device is a charging device. It is characterized in that it receives a control signal output by the current control unit and performs control to reduce the charging current.
According to this configuration, when the current flowing through the main circuit on the secondary side of the watt-hour meter approaches the contract current value, the power supplied to a specific load can be reduced and controlled, and the situation where the entire household loses power can be prevented. Is possible.

According to the electric circuit breaker storage box of the present invention, when the current flowing in the main electric circuit on the secondary side of the watt hour meter approaches the contracted current value, a control signal for reducing the current is output to a specific load. By reducing the current of a specific load by using the signal, it is possible to control the current of the main circuit so as not to exceed the contract current.
In addition, the circuit breaker can be protected from rainwater and dust. Further, when it is stored together with the watt-hour meter, it can be stored in a small space, and the wiring between the watt-hour meter and the electric circuit cutoff device is not exposed, which is aesthetically pleasing.

It is a block diagram of the electric circuit cutoff device. It is explanatory drawing of the electric circuit cutoff device storage box. It is explanatory drawing which shows another example of the electric circuit cutoff device storage box.

Hereinafter, embodiments embodying the present invention will be described in detail with reference to the drawings. FIG. 1 is a block diagram of the electric circuit blocking device according to the present invention, and also shows connected devices. 1 is a watt-hour meter, 2 is an electric circuit cutoff device, 3 is a charging device (EV charger) for charging an electric vehicle (EV vehicle) 4 which is a specific load, and 5 is a protection device for the electric circuit to the EV charger 3. It is a leakage breaker as a breaking means.

The lead-in line L1 from the commercial power system (commercial power supply) is connected to the primary side of the watt hour meter 1, and the main electric circuit L2 on the secondary side is connected to the primary side terminal 2a of the electric circuit cutoff device 2.
In the electric circuit blocking device 2, the primary side terminal 2a to which the main electric circuit L2 of the watt hour meter 1 is connected and the secondary side terminal to which the first electric circuit L3 leading to the residential distribution board (distribution board) (not shown) is connected. 2b, the communication terminal 2c to which the communication line S1 for communicating with the EV charger 3 is connected is provided. A plurality of relatively low-power electric devices are connected to a residential distribution board, and the power is supplied to the distribution board.

Further, the EV charger 3 is connected to the secondary side of the electric circuit cutoff device 2 via the second electric circuit L4 branched from the first electric circuit L3 immediately after the secondary side terminal 2b of the electric circuit cutoff device 2. .. The EV car 4 is charged by connecting the charging cable L5 to the EV charger 3.

The configuration of the electric circuit blocking device 2 is as follows. As shown in FIG. 1, in addition to an opening / closing contact 21 as an opening / closing means arranged on the main electric circuit L2 and a mechanism for opening / closing the opening / closing contact 21, an opening / closing equipped with a plunger or an electric motor for shutting / returning the opening / closing contact 21. Mechanism unit 22, current sensor 23 including, for example, a current transformer that detects the current of the main electric circuit L2, control unit 24 that controls the entire electric circuit cutoff device 2, power supply unit 25 that supplies power to individual circuits, EV charger 3 It is equipped with a communication IF26 or the like for communicating with.

The control unit 24 has a built-in CPU, stores a contract current value, and controls the opening / closing mechanism unit 22 to open the opening / closing contact 21 when a current exceeding the contract current flows in the main electric circuit L2. Further, a reference current value that is a certain amount smaller than the contract current is stored, and when a current exceeding this reference current value is detected, a predetermined control signal is transmitted from the communication IF 26 to the EV charger 3 via the communication line S1. do.

The EV charger 3 has a built-in charging current control circuit 3a for controlling the charging current of the EV vehicle 4 and a communication unit 3b for communicating with an external device, and receives a control signal from the electric circuit cutoff device 2 which is an external signal to charge the charging current. It has a function to control the reduction of electric current.

The operation of the electric circuit blocking device configured as described above is as follows. The control unit 24 measures the electric circuit current of the main electric circuit L2, and when a current exceeding the contract current continuously flows for a predetermined time, operates the opening / closing mechanism unit 22 to perform an overcurrent cutoff for opening the opening / closing contact 21. .. As a result, the main electric circuit L2 is cut off, the energization of the EV charger 3 and the energization of the residential distribution board are stopped, and the entire household is cut off.
Further, communication is performed with the EV charger 3 via the communication IF 26, and charging current information is obtained from the EV charger 3. Then, when the EV car 4 is connected to the EV charger 3 and is being charged, if the current of the main electric circuit L2 exceeds the reference current value, a control signal for reducing the charging current is output, and the EV charger 3 is charged. Send to. In the EV charger 3 that receives this control signal, the charging current control circuit 3a reduces the charging current by a certain amount and continues charging.

When the EV charger 3 is connected to the EV charger 3 and charging is started, the EV charger 3 transmits a charging start signal from the communication unit 3b to the communication IF 26 of the electric circuit blocking device 2 via the communication line S1. Then, the communication IF 26 notifies the control unit 24 of the start of charging. When charging is completed, a charging end signal is transmitted to the communication IF, and the communication IF 26 notifies the control unit 24 of the end of charging.

In this way, when the current flowing in the main electric circuit L2 on the secondary side of the watt-hour meter 1 approaches the contract current value, a control signal for reducing the current is output to the EV charger 3 as a specific load. The EV charger 3 reduces and controls the charging current by the signal. Therefore, the current of the main electric circuit L2 can be controlled so as not to exceed the contract current, and a situation in which the entire household loses power can be prevented.

FIG. 2 is an explanatory diagram of an electric circuit blocking device storage box (hereinafter, simply referred to as a “storage box”) for accommodating the electric circuit blocking device 2, and shows a state in which the electric circuit blocking device 2 is housed. Since the electric circuit blocking device 2 is installed outdoors like the watt-hour meter 1, it is stored in a storage box for protecting it from rainwater and the like.
The storage box 10 has a main body 10a having an open front surface and a door panel (not shown) that closes the front surface, and is configured to be hermetically sealed. Then, as shown in FIG. 2, the storage box 10 is configured to be housed together with the watt-hour meter 1, the watt-hour meter 1 is housed in the upper part, and the electric circuit blocking device 2 is housed in the lower part. Further, on the back surface of the main body 10a between the two, insertion holes 11 (11a, 11b) for drawing the lead-in wire L1 from the back and pulling out the first electric circuit L3 arranged in the residential distribution board are formed. ing. The storage box 10 is attached to the wall surface of a house or the like.

Further, as shown in FIG. 2, the primary side terminal 2a of the electric circuit breaker 2 is provided on the upper left side of the housing 20 of the electric circuit breaker 2, and the secondary side terminal 2b is arranged on the upper right side of the housing 20. A space for accommodating the earth-leakage circuit breaker (ECLB) 5 is provided on the right side adjacent to the electric circuit breaker accommodating portion.
As a result, the housed earth-leakage circuit breaker 5 can be connected to the housed earth-leakage circuit breaker 5 via the copper bar (secondary feed copper bar) 12. The primary terminal of 5 is connected.
In this way, the lead-in line L1 is pulled in from the back surface of the storage box 10, while the first electric circuit L3 arranged on the residential distribution board is sent out from the back surface. Further, the second electric line L4 and the communication line S1 are pulled out from the lower surface of the storage box 10.

In this way, since the electric circuit blocking device 2 is stored in the storage box 10, it can be protected from rainwater and dust, and can be stored together with the watt-hour meter 1 in a space-saving manner. Further, since the watt hour meter 1 and the electric circuit cutoff device 2 are housed integrally, the wiring between them is not exposed, which is aesthetically pleasing.
Further, the earth-leakage circuit breaker 5 arranged on the second electric circuit L4 to which the EV charger 3 is connected is also housed together in the storage box 10 for accommodating the electric circuit breaker 2, so that a separate installation space is not required. However, since both can be connected by the copper bar 12, there is no need to route the wiring for connection.

FIG. 3 shows another form of the storage box 10 and shows a form of storing the watt-hour meter 1 in a storage box 15 independent of the box body for storing the watt-hour meter 1. The storage box 15 has a main body 15a and a lid plate (not shown) that closes the front surface of the main body 15a, and is configured to be hermetically sealed.
Further, in the storage box 15, an installation space for an earth-leakage circuit breaker 5 for protecting the second electric circuit L4 to the EV charger 3 is provided as in the form of FIG. 2, and the electric circuit breaker 2 and the earth-leakage circuit breaker are provided. The vessel 5 is configured so that it can be easily connected using the copper bar 12.

In this way, the electric circuit blocking device 2 may be stored alone, can be protected from rainwater and dust, and is also stored together with the blocking means, which is aesthetically pleasing. Further, the electric energy meter 1 can use a conventional storage box.

In the above embodiment, the storage boxes 10 and 15 are provided with a space for accommodating the earth leakage breaker 5, but this space may not be provided. Further, although the control unit 24 determines the overcurrent and controls the opening / closing mechanism unit 22 to perform a shutoff operation, the opening / closing mechanism unit 22 detects the occurrence of the overcurrent by thermal electromagnetic or complete electromagnetic without relying on electronic control. May be operated.

1 ... Electricity meter, 2 ... Electric circuit breaker, 2a ... Primary side terminal, 2b ... Secondary side terminal, 3 ... EV charger (charging device, specific load), 5 ... Earth-leakage circuit breaker (Blocking means), 10 ... Electric circuit breaker storage box, 11 ... Insertion hole, 12 ... Copper bar, 15 ... Electric circuit breaker storage box, 21 ... Opening / closing contact (opening / closing means), 24 ... Control unit (Current control unit), 26 ... Communication IF.

Claims (2)

A circuit breaker storage that is installed in the main circuit on the secondary side of the watt-hour meter and houses an electric circuit cutoff device having an overcurrent cutoff function that cuts off the main electric circuit when an overcurrent exceeding the contract current flows through the main electric circuit. It's a box
A specific load and a distribution board to which a plurality of electric devices are connected are branched and connected to the main electric line.
It has a watt-hour meter storage section at the top and a circuit cutoff device storage section at the bottom, and has an insertion hole on the back between the two storage sections for drawing a lead-in wire.
The electric circuit breaker measures a current value of the main electric circuit, and when the current value exceeds a reference current value which is a certain amount smaller than the contracted current, a control signal for reducing the current energizing the specific load. while have a current control unit that outputs,
A space adjacent to the electric circuit blocking device accommodating portion is provided with a space for accommodating the interrupting means for protecting the electric path leading to the specific load, and the secondary terminal of the accommodating electric circuit blocking device and the accommodating blocking means are provided. An electric circuit breaker storage box characterized in that it can be connected to the primary terminal with a copper bar. The specific load is a charging device for an electric vehicle having a function of reducing the current applied to itself by a control signal from the outside.
The electric circuit cutoff device storage box according to claim 1, wherein the charging device receives the control signal output by the current control unit and performs control to reduce the charging current.

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