JP2732212B2 - Power supply cutoff system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power supply cutoff system for cutting off power supply when a current exceeding a contract current flows.

[0002]

2. Description of the Related Art For example, when a general household or the like receives power from a power company, a breaker having a current capacity specified by a contract with the power company is installed on a distribution board or the like in an indoor room. When a current exceeding the contract current flows, such as when a short circuit occurs due to equipment failure or when many electrical appliances are used at the same time, the breaker operates and automatically cuts off all power supply to the home. I have.

However, the amount of electricity used in ordinary households is
It always fluctuates, and it is very inconvenient if the power supply is interrupted each time due to a temporary excess of current. In order to avoid this, it is better to increase the contract current.However, the current electricity tariff system is such that the higher the contract current, the higher the basic charge. It is economical.

[0004] Further, some electrical appliances used in the home, such as refrigerators and lighting fixtures, are very inconvenient if the power supply is suddenly cut off by the operation of a breaker. If there is a device that can be stopped at any time during the process as described above, if the user can grasp the power currently used and determine in advance that the contract current is likely to be exceeded, limit the use of the device. It is also conceivable that the current of the entire appliance used does not exceed the contract current.

[0005]

However, in the current breaker-based cutoff system, the user cannot know in advance that the power consumption has exceeded, and when power consumption exceeds the contract current, the power supply is cut off. However, if the current exceeds the contract current, the breaker will be activated instantly without any notice, and all electrical appliances in the home will not be able to be used instantaneously, causing a great inconvenience to the user. Has been brought. In addition, since the power supply is repeatedly turned on and off by the operation of the breaker, a heavy load is imposed on some appliances, and the function of the OA appliance or the like is impaired or its life is shortened. Further, if the contract current is increased to prevent this, a high basic fee must be continuously paid to cope with a temporary increase in power consumption, which is uneconomical.

In order to solve such a problem, the applicant of the present application has disclosed in Japanese Patent Application No. 5-330686 that when a detected current exceeds a contracted current, a breaker is operated to turn on an adapter attached to a device. It proposes a system that cuts off the current and turns off the breaker if the detected current exceeds the contract current.

However, once the energization of the adapter is interrupted, restoring the energization of the individual adapter when the user intends to use the adapter after that is extremely troublesome when the number of adapters is large. Therefore, it is conceivable that the power is automatically restored by an instruction from a breaker or an adapter when a predetermined time has elapsed.However, a person does not directly operate the appliance, but is automatically operated by a breaker or the like. Initiating operation of the device is particularly dangerous for devices that generate heat and devices that generate power.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to shut off the adapter first when the total current of the appliance being used exceeds the contract current. An object of the present invention is to provide a power supply cutoff system capable of safely and easily restoring the power supply of an adapter that has been lowered and then cut off once.

[0009]

In order to achieve the above object, the present invention comprises a breaker and a plurality of adapters connected to respective outlets.
First current detecting means for detecting the total current flowing through the breaker, first transmitting means for transmitting a signal to the adapter, first breaking means for cutting off the current to the breaker itself, and contract current for returning A predetermined time, a power supply cutoff order of the adapter, and storage means for storing an identifier of the adapter, and when the detected current value exceeds the contract current, the first transmission means sends a corresponding adapter from the first transmission means in accordance with the power supply cutoff order. A shutoff signal is sent in order to cut off the current supply to the adapter, and when the current value exceeds the contract current even after the current supply to all the power cutoff adapters is cut off, the first cutoff means is operated. To stop the power supply, and restore the power supply to the adapter after the predetermined time has elapsed since the interruption,
Further, when the detection current of the first current detection means increases by the return operation, the adapter is shut off again.
Control means, wherein the adapter has a receiving means for receiving a signal from the breaker, a second cutoff means for cutting off the power supply to the adapter, a return means for restoring the cutoff state of the adapter, and a return means for the adapter. Storage means for storing an identifier; and second control means for activating the second interrupting means when receiving a shutoff signal from the breaker, and activating the return means when receiving the return signal. To construct a power supply cutoff system.

Also, a function of determining whether or not to perform a return operation is provided in the adapter, and a return prohibition signal for not performing the return operation is transmitted from the adapter to the breaker.

[0011]

When the total current is equal to or less than the contract current, both the electric device via the adapter and the device directly connected to the outlet are energized. When the current value detected by the first detection means of the breaker exceeds the contract current, a cutoff signal is transmitted according to the power cutoff order, and the power supply to the adapter is sequentially cut off.
The breaker shuts off the breaker itself when the detected current value exceeds the contract current even after the adapter is shut down, but if the breaker itself does not shut off, the shut-off adapters are sequentially restored after a predetermined time has elapsed. Let it. And
If the current value rises when the adapter is restored,
The adapter is shut off again. As a result, the shut-down adapter can be automatically restored, and the device can be prevented from automatically starting operation.

[0012]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a diagram showing an entire power supply cutoff system according to the present invention. The breaker 1 is installed at an appropriate place indoors, and a service line 5 from the outside is connected.
An indoor wiring 4 laid indoors extends from the breaker 1, and outlets 3 are attached to respective ends of the indoor wiring 4, to which electric appliances 6a to 6e are connected. In FIG. 1, the plug (not shown) of the refrigerator 6a and the water purifier 6b that the user always wants to be supplied with power is directly connected to the outlet 3, but even if the power supply is suddenly cut off. The air conditioner 6c, hair dryer 6d and microwave oven 6e, which do not cause much trouble, are connected to the outlet 3
The adapter 2 is attached to the plug, and each plug is connected via the adapter 2.

Next, the structure of the breaker 1 will be described with reference to FIG.

The breaker 1 has a power receiving terminal 11 connected to the outdoor service line 5 and a power transmitting terminal 12 connected to the indoor wiring 4.
A shutoff device 13, a current detector 14, and a transmission device 15 are provided therebetween, and a CPU 1 that controls them is provided.
6. A ROM 17, a RAM 18, a clock 19, and an input device 21 as storage means are attached.

The cutoff device 13 cuts off current supply between the power receiving terminal 11 and the power transmitting terminal 12, and includes a current detector 14.
Is a detecting means for detecting a value of a current flowing therebetween.

In the transmitting device 15, as shown in FIG. 4, the wiring connected to the power supply side is branched into two circuits A and B, the circuit A is connected to the output terminal 22 via the CMOS 15a, and the circuit B is connected to the CMOS 15b. It is connected to the output terminal 22 via the connected transformer 19. This transformer 15c has a turns ratio of 90 on the secondary side to 100 on the primary side, and 90 V is obtained at the output terminal. Furthermore, CMOS1
5a and the CMOS 15b are connected to the CPU 16 via the buffer IC 15d, and a voltage of about 5 V is applied based on a control signal from the CPU 16 so that the buffer I
Switching between circuit A and circuit B is performed by C15d, and a cutoff signal and a return signal are generated.

The cutoff signal has a waveform as shown in FIG.
When a signal having the same waveform as the cutoff signal is sent from the CPU 16 to the buffer IC 15d shown in FIG.
The MOS 15b is switched according to the signal from the CPU 16. The switching timing is about 100 msec. As a result, if the CMOS 15a is turned on, 100V is directly connected to the output terminal 22 and 100V is output to the output terminal 22, and if the CMOS 15b is turned on, a voltage of 90V stepped down by the transformer 15c is output. , 100 V and 90 V are generated in accordance with the waveform of the signal from the CPU 16 and transmitted from the power transmission terminal 12 to which the output terminals 22 of the circuits A and B are connected.
The same applies to the transmission of the return signal.

The ROM 17 stores the contract current of the breaker 1,
The identification number of each adapter, the power supply cutoff order of each adapter, a predetermined time for return, and a cutoff signal and a return signal to be transmitted to the adapter 2 are stored. The CPU 16 compares the current value detected by the current detector 14 with the contract current stored in the ROM 17 and, if the detected current value exceeds the contract current, issues an instruction to cut off the energization of the adapter 2. As described above, the data is sent to the transmission device 15 via the buffer IC 15d in accordance with the power-off order. Then, the cutoff signal is transmitted with the identification number of the corresponding adapter 2 attached according to the power cutoff order stored in the ROM 17. If the total current value detected by the current detector 14 still exceeds the contract current after issuing the cutoff instruction to the adapter 2, a cutoff signal is sent to the cutoff device 13 to stop energizing the breaker 1. It has become.

Further, the CPU 16 transmits a shut-off signal to the adapter 2, and when the detected current becomes equal to or smaller than the contract current, a reset signal for sequentially resetting the shut-off after a lapse of a predetermined time from the shut-off, to the corresponding adapter 2. Send. And
When the current value detected by the current detector 14 increases due to the return of the adapter 2, the disconnection signal is transmitted again from the transmitting device 15 to interrupt the return of the adapter 2 in order to cancel the return of the adapter 2.

Next, the configuration of the adapter 2 will be described with reference to FIG.

As shown in FIG. 3, the adapter 2 includes a power receiving terminal 31 inserted into the outlet 3 and a power transmitting terminal 32 for connecting a plug such as an electric appliance 6a, between which a shutoff device 33 and a receiving device 35 are provided. Further, it is composed of a CPU 36 for controlling them. The breaking device 33 is C
The power supply between the power receiving terminal 31 and the power transmitting terminal 32 is interrupted by an instruction from the PU 36.

In addition to the receiving device 35, the CPU 36 has a ROM 37, a RAM 38, and a clock 3 for synchronization.
9, the warning device 40 and the return device 41 are connected.

As shown in FIG. 6, the receiving device 35 is provided internally with a voltage determining IC 35a used for an AC tester or the like. The voltage is measured at intervals of, for example, 25 msec, and the result is sent to the CPU 36. The ROM 37 stores a cutoff signal and a return signal.

The return device 41 is a device for releasing the shut-off of the shut-off device 33. The reset device 41 can return through the CPU 36, and can directly operate the shut-off device 33 manually.

The CPU 36 determines that the receiving device 35
Receiving the shut-off signal and the return signal from the
Activate That is, when the signal is received, the voltage change IC 35a in the receiving device 35 reads the change in the voltage from the breaker 1 and the data is sent to the CPU 36.
Based on the data, the CPU 36 sets a flag to 1 if the voltage value is 100 V, sets a flag to 0 if the voltage value is 90 V, and sequentially assigns the result to, for example, 32 bits. Calculate the change in voltage every 100 msec. Then, the calculated value is stored in the ROM
Compare the waveforms of the shut-off signal and the return signal stored in 37, and when the waveforms match, determine that the signal is the shut-off signal or the return signal, and activate the shut-off device 33 to stop the power supply to the connected equipment. And let it return.

Next, the operation of the power supply cutoff system will be described with reference to the flowchart of FIG.

First, the adapter 2 is connected to a device that can be shut off when the total power consumption exceeds the contract current.
Attach. That is, the plugs of the air conditioner 6c, the hair dryer 6d, and the microwave oven 6e of FIG. 1 are inserted into the power transmission terminal 32 of the adapter 2, and the power reception terminal 31 is inserted into the outlet 3 at each location. Furthermore, each device 6
The power cutoff order for each of c, 6d, and 6e is set in the breaker 1. The setting of the power-off sequence may be performed by inputting the identifier of each adapter 2 from the input device 21 in accordance with the power-off sequence and storing the identifier in the RAM 18 of the breaker 1. When the identifier is stored in the ROM 17 of the breaker 1, the adapter 2 may be attached to the device 6c or the like according to the order.

The use is started from this state. First, a predetermined time T from the interruption to the restoration is read from the ROM 37 (F-1), and the current is detected by the current detector 14 (F-
2) Compare the detected current with the contract current (F-3).
If the detected current exceeds the contracted current, the breaker 1 and the adapter 2 perform cutoff processing (F-
4), proceed to step (F-5).

The shut-off processing by the breaker 1 and the adapter 2 according to the above steps (F-2) to (F-4) will be described in more detail with reference to FIG.

First, the step (F-1) is completed, the power-off order is set (G-1), and the maximum number N of the adapters 2 is stored in the RAM 18 (G-2). Next, in the breaker 1, when a current value is input from the current detector 14 (G-3), it is compared with the contract current (G-
4) If the contract current has not been exceeded, proceed to step (F-6) in FIG. On the other hand, if it is determined that the detected current value exceeds the contracted current, i is set to 1 (G-5), and the setting order i, that is, the adapter 2 having the first energization cutoff order is cut off. So that the cutoff signal is transmitted by the transmitting device 1
5 to the adapter 2 (G-6). as a result,
The adapter 2 with the power cutoff order of 1 is cut off, and the power supply to the electric equipment connected thereto is stopped. If the power supply is cut off in this way, it is again determined whether or not the current value exceeds the contract current (G-7). If not, the process proceeds to step (F-5) in FIG. On the other hand, when the detected current still exceeds the contract current, the process proceeds to step (G-8).

In step (G-8), i and N are compared. If i has not reached N, the process returns to step (G-6) via step (G-9), and returns to step (G-6). ) To perform the same operation as described above. That is, in step (G-9), i is sequentially increased by one, and the adapter 2 is shut off in accordance with the power-off order. Then, if the power consumption falls within the contract current, the step (G-
Return to 1) and shift to normal power supply. On the other hand, step (G
In -8), when i reaches N, there are no more adapters 2 that can be shut off, so if the current value still exceeds the contract current at this stage, the CPU 16
Sends a signal to stop the power supply to the breaking device 13 to cut off the breaker 1.

In this way, when the current value exceeds the contract current, the adapters 2 are sequentially cut off in accordance with the set energization cutoff order, and if the current value falls within the contract current in the middle, the importance is low. The power supply to the equipment, for example, the air conditioner 6c, the dryer 6d, etc. is only interrupted, the power supply to the breaker 1 itself is not interrupted, the contract can be made with a small contract current, and the power supply to the adapter 2 stored in the ROM 16 can be performed. If the current value exceeds the contracted current even if all the currents are interrupted, the breaker 1 is interrupted, so that a large current does not continue to flow, and an accident such as a fire is reliably prevented.

Next, the return operation of the adapter 2 will be described with reference to FIG.
Returning to the flowchart of FIG.

Steps (F-4) to (F-
The point of time of moving to 5) is when the detected current is lower than the contract current at the stage when the adapter 2 up to a certain order is shut off. To memorize. Then, the process returns to step (F-2).

On the other hand, if it is determined in step (F-3) that the detected current does not exceed the contract current, it is determined whether or not there is any adapter 2 that has already been interrupted (F-6). At this time, the process returns to step (F-2). However, if there is an interrupted adapter 2, it is determined whether or not there is an adapter 2 that has passed a predetermined time T from the interruption to the current time (F- 7). If no adapter 2 has passed the predetermined time T, the process returns to step (F-2).
If there is an adapter 2 for which the predetermined time T has elapsed since the interruption, the power supply to the adapter 2 is restored (F-8).

After returning, it is determined whether or not the detected current of the current detector 14 has increased (F-9). If the detected current has not increased, the identification number of the restored adapter 2 is removed from the memory. (F-10), Step (F-2)
Return to When the detected current increases, the restored adapter 2 is shut off again. Then, the identification number and the cutoff time are stored, a warning is issued to the adapter 2, and the process returns to step (F-2).

With this configuration, when a predetermined time T has elapsed after the adapter 2 was shut off, the power supply to the adapter 2 is automatically restored, and the user is not required to work. Then, when the adapter 2 is returned, the increase in the detected current is detected, and when the current is increasing, the restored adapter 2 is shut off again and a warning is issued. If the appliance is still turned on after powering on, the appliance will not be energized,
Accidents such as fire can be prevented, and if the user switches off the appliance by a warning, the interruption is automatically restored.

Next, a second embodiment of the present invention will be described with reference to FIG.
This will be described with reference to FIG.

The same reference numerals as those in FIGS. 2 and 3 denote the same components, and a description thereof will be omitted.

The breaker 1 has a CPU 4 as shown in FIG.
6, a shut-off device 13, a current detector 14, and a CPU 46
Are connected to a ROM 47, a RAM 48, a transmitting device 55, and a receiving device 56. The ROM 47 stores, in addition to the contract current, an identification number as an identifier of each adapter 2, an energization interruption order, and an interruption signal. The transmitting device 55 and the receiving device 56 both use wireless means, and transmit and receive signals to and from the adapter 2 through the antenna 57.

As described in the first embodiment, when the current detected by the current detector 14 exceeds the contract current, the CPU 46 sequentially shuts off the adapters 2 in accordance with the power-off sequence, and further contracts. When the current is exceeded, the breaker 13 of the breaker 1 is operated, and when the current becomes less than the contract current due to the shutoff of the adapter 2, a return signal is sequentially issued to the adapter 2 after a predetermined time elapses. Let it.

Further, when a return prohibition signal is received from the adapter 2 indicating that the connected device is still switched on, the adapter 2 that has transmitted the return prohibition signal returns to the adapter 2. There is no signal transmission.

On the other hand, as shown in FIG. 10, the adapter 2 has a CPU 66, a cutoff device 33, and a current detector 34. The CPU 66 includes a ROM 67, a RAM 68, a recovery device 41, a transmission device 75, and a reception device 76. , A warning device 40 is connected. The ROM 67 stores an identification number of the identifier of the adapter 2, a warning signal, a return signal, a standby time t, and a cutoff signal. The return device 41 is a device for releasing the cutoff of the cutoff device 33 and is returned through the CPU 66. Alternatively, the shut-off device 33 can be directly operated manually. The waiting time t is shorter than the predetermined time T.

Each of the transmitting device 75 and the receiving device 76 uses radio means, and transmits and receives signals to and from the breaker 1 through the antenna 77.

When the CPU 66 receives the cut-off signal from the breaker 1, it activates the cut-off device 33 to cut off the power supply.
Then, the interruption time is stored in the RAM 68, and when the elapsed time from the interruption reaches the standby time t, the interruption device 33 is temporarily returned, and the change in the current is detected by the current detector 34.
Receive from At this time, when it is detected that a current has flowed through the current detector 34, it is recognized that the device connected to the adapter 2 is still turned on, and a return prohibition signal to that effect is transmitted to the transmitting device. From 75, an identifier of the adapter is attached and transmitted to the breaker 1.

Even with this configuration, as in the above-described power supply cutoff system, when the device connected to the adapter 2 is kept turned on, the cut off adapter 2 does not return, and a fire or the like does not occur. Can be prevented, and the breaker 1 is determined in advance with the adapter 2 that can be returned.
The adapter 2 can be returned unconditionally.

Further, as another embodiment, the adapter 2 which has confirmed that the switch of the connected device is kept turned on may not be restored by the return signal from the breaker 1. In this case, there is no need for a means for storing the return condition of the adapter 2 in the breaker 1, and it is sufficient to simply issue a return signal to the adapter 2 after a predetermined time has elapsed.

Further, in the above embodiment, the communication means such as the transmitting device 75 is wireless. However, the present invention is not limited to this. The transmitting device 75 is connected to the indoor wiring 4 and a high-frequency signal is transmitted there. You may comprise so that it may be carried. In that case, a waveform analysis operation function or the like is provided to each of the transmission / reception devices of the breaker 1 and the adapter 2 so that signals are exchanged. For example, a signal having a frequency of 1 kHz or more is placed on the indoor wiring 4 and a frequency analysis is performed on the receiving side that has received the signal, and the meaning of the signal is analyzed based on predetermined correspondence conditions. Then, a method of performing a predetermined operation, for example, interruption or transmission of information, is considered. With this method, the voltage fluctuates, but the fluctuation is not enough to impair the actual efficiency. The frequency used is high, which is a so-called noise range, so that the influence on the appliance is very small.

[0050]

According to the power supply cutoff system of the present invention, when the current value exceeds the contract current, the adapters are sequentially cut off in accordance with the power supply cutoff order, thereby preventing the operation of the breaker and the burden on the equipment due to the breaker cutoff. Etc. can be reduced. Also,
If the current value still exceeds the contract current, the breaker will be shut off, so that even if the current exceeds the contract current, power supply to all appliances will not be stopped immediately. It is economical to contract with electric current,
In addition, the inflow of a large current is interrupted by the breaker, so that an accident such as a fire can be prevented. Furthermore, when the adapter is cut off within the contract current due to the cutoff, the cut-off adapter is sequentially turned on after a lapse of a predetermined time, so that there is no need for the user to individually return, and the adapter is returned. When the current increases, the adapter is not restored, so that the adapter with the appliance turned on is not restored, and fire or the like can be prevented.

[Brief description of the drawings]

FIG. 1 is a diagram showing an entire power supply cutoff system according to the present invention.

FIG. 2 is a block diagram illustrating a configuration of a breaker.

FIG. 3 is a block diagram illustrating a configuration of an adapter.

FIG. 4 is a diagram showing a transmitting device of a breaker;

FIG. 5 is a diagram showing a cutoff signal.

FIG. 6 is a diagram showing a receiving device of an adapter.

FIG. 7 is a flowchart showing the operation of the power supply cutoff system of the present invention.

FIG. 8 is a flowchart showing the operation of the power supply cutoff system of the present invention.

FIG. 9 is a block diagram showing a configuration of a breaker.

FIG. 10 is a block diagram illustrating a configuration of an adapter.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Breaker 2 Adapter 3 Outlet 4 Indoor wiring 5 Service lead 6a-6e Electrical equipment 11,31 Power receiving terminal 12,32 Power transmitting terminal 13,33 Breaking device 14,34 Current detecting device 15 Transmitting device 16,36 CPU 17,37 ROM 18, 38 RAM 35 Receiving device 39 Clock 41 Recovery device

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Mitsunori Komaki 2-4-17-705, Sarie, Koto-ku, Tokyo (72) Inventor Kanako Nakayama 7-39-10, Koganehara, Matsudo-shi, Chiba (56) References JP-A-56-159935 (JP, A) JP-A-3-285518 (JP, A)

Claims (3)

(57) [Claims] 1. A breaker and a plurality of adapters connected to respective outlets, a first current detecting means for detecting a total current flowing through the breaker, and a signal transmitted to the adapter. A first transmitting means for performing the operation, a first interrupting means for interrupting the power supply to the breaker itself, a storage means for storing a contract current, a predetermined time for return, a power-off interruption order of the adapter, and an identifier of the adapter. When the current value exceeds the contract current, the first transmitting unit sequentially sends a shutoff signal to the corresponding adapter in accordance with the energization cutoff order, and cuts off the energization of the adapter. If the current value exceeds the contract current even after the interruption, the first interruption means is operated to stop the power supply, and the predetermined time has elapsed since the interruption. First control means for restoring energization of the adapter, and further shutting off the adapter again when the detection current of the first current detection means increases due to the return operation, wherein the adapter has a signal from the breaker. Receiving means, receiving means for receiving power, second interrupting means for interrupting the power supply to the adapter, restoring means for restoring the interrupted state of the adapter, storage means for storing an identifier of the adapter, and receiving an interrupting signal from the breaker. When the second
A power supply cutoff system, comprising: a second control means for activating the cutoff means and activating the return means when the return signal is received. 2. A breaker and a plurality of adapters connected to each outlet, wherein the breaker has first current detecting means for detecting a total current flowing through the breaker, and a signal is transmitted to the adapter. A first transmitting means for performing the operation, a first interrupting means for interrupting the power supply to the breaker itself, a storage means for storing a contract current, a predetermined time for return, a power-off interruption order of the adapter, and an identifier of the adapter. When the current value exceeds the contract current, the first transmitting unit sequentially sends a shutoff signal to the corresponding adapter in accordance with the energization cutoff order, and cuts off the energization of the adapter. When the current value exceeds the excess allowable amount even after the interruption, the first interruption means is operated to stop the power supply, and the predetermined time has elapsed since the interruption. A first control unit for causing the first transmitting unit to transmit a return signal for returning the energization of the adapter from the first adapter, a receiving unit for receiving a signal from the breaker, and an energization of the adapter. Second shut-off means for shutting off the power supply, return means for returning the cut-off state of the adapter, second current detection means for detecting a current flowing through the adapter, an identifier of the adapter, shorter than a predetermined time for the return. Storage means for storing a standby time; and a second means for receiving a shut-off signal from the breaker.
When the standby time elapses after the interruption of the energization, the return means is temporarily activated, and when the second current detection means detects the flow of current, the interruption means is transmitted from the breaker. And a second control unit that does not operate the return unit in response to the return signal. 3. The adapter has a second transmitting means for transmitting a signal to the breaker, and the second control means resets when a current flow is detected by a temporary return of the return means. A function of transmitting a prohibition signal from the second transmission means to the breaker, wherein the first control means of the breaker has a function of not transmitting a recovery signal to the adapter when the return prohibition signal is received from the adapter. 3. The apparatus according to claim 2, wherein
A power supply cutoff system according to item 1.