JP2002152920A - Indoor distribution system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an indoor distribution system which enables anyone to easing perform operation of causing apparatuses which require continuity of power-on to maintain its power-on state, and of cutting off power supply to other apparatuses when one is at the entrance of a house, or at a place of one's visit, etc., when one is going out, and to enhance its operability and safety. SOLUTION: An NFB 2 is connected to lead-in wires 1 for AC 100 V, and a ground leakage breaker 3 is connected to this NFB 2. To this leakage breaker 3, a branch breaker 4 and an operation part 14 are connected. The operation part 14 is composed of a relay coil 18, connected to the output stage of an NFB 17, connected to the leakage breaker 3, and a series circuit of the NFB 17 and a contact 18a and a red indicator lamp 19. To the branch breaker 4, a refrigerator, a home telephone, etc., which always require supply of power, are connected. To branch breakers 6-9 connected to the NFB 17, apparatuses, such as lighting fittings whose power on an off are feasible on occasion, are connected. Though the branch breakers 6-9 become in an off-state simultaneously, when the NFB is turned into an off-state, the branch breaker 4 maintains its off-state.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an indoor power distribution system, and more particularly, to a device such as a refrigerator which is not required to be turned off even if the user is out of the office, keeps the power on, and turns it on such as a lighting fixture. The present invention relates to an indoor power distribution system for enabling devices to be turned off at any time.

[0002]

2. Description of the Related Art FIG. 5 is a system diagram showing a configuration of a conventional indoor power distribution system. The switchboard 100 installed at a predetermined place in the house is a single-phase AC (A) from a low-voltage distribution line such as a telephone pole.
C) It is connected to the 100 V service line 101. The switchboard 100 has a contract current capacity (30 amps, 2 amps).
0, etc.), a mains breaker 102 connected to the mains breaker 102, a mains breaker 103 for shutting off a circuit when a short circuit occurs, and a branch breaker connected in parallel to the mains breaker 103. 10
4, 105, 106, 107 and 108. Master breaker 102 and branch breaker 104-
For 108, a no-fuse breaker (NFB) is used. For example, the branch breaker 104 has the lighting equipment b1 on the first floor, the branch breaker 105 has the outlet b2 provided on each wall of the first floor, and the branch breaker 106.
, An outlet provided on the kitchen wall (for example, a refrigerator, a home telephone, an answering machine, etc., is always connected) b3, a second-level lighting device b4 for the branch breaker 107, and a second-level lighting device b4 for the branch breaker 108. The outlet b5 provided on the wall is connected.

[0003] In the above configuration, a family member (resident) rarely operates the switchboard 100. However, for example, if the number of days when the house is absent due to a business trip or a trip, the number of days should be reduced. It is better to turn off the electricity and go out
It is desirable to prevent accidents such as short-circuits and the occurrence of fires and the like. In such a case, from among the branch breakers to which the electric device (or the electronic device) is connected, a branch breaker whose power-off is not considered to be a problem may be selected and turned off, or the main breaker 102 may be turned off to go out. .

[0004]

However, for residents who rarely handle a switchboard, for example, a refrigerator in which frozen food is kept inside, or an electronic type in which an answering machine response function is set. It is difficult for the branch breaker to choose not to turn off the telephone, and if the main breaker 102 is turned off, the refrigerator or the electronic telephone will not function. In particular, in a refrigerator, there is a possibility that the stored articles may become spoiled, or ice or the like may melt and the kitchen may be wetted with water.

[0005] If all the circuit breakers of the switchboard are turned off in fear of such a situation, as is well known, there is no short circuit due to poor contact between the outlet and the plug, short circuit due to dust accumulated in the outlet, and the like. If it happens during this time, it will be very dangerous and in the worst case,
May cause fire. In such a case, if the resident is at home, it is easy to take measures such as extinguishing the fire by noticing the occurrence of the fire or contacting the fire department, but in the absence of the resident, there is a risk that it may be important. is there. In order to prevent such a situation, it is important to keep a regular mind, such as cleaning the outlet, but again, without requiring specialized knowledge, simply turn off the power of devices that do not need to be energized when going out. It is desirable to be able to turn it off.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned conventional problems. An apparatus which needs to be continuously powered on is kept powered on, and power supply to other apparatuses is turned off. It is an object of the present invention to provide an indoor power distribution system in which anyone can easily perform an operation by remote control from the entrance or outside when going out, and operability and safety can be improved.

[0007]

To achieve the above object, an indoor power distribution system according to the present invention comprises a main breaker connected to a low voltage distribution line and installed in a building such as a house.
An earth leakage breaker connected to the main breaker, one or more first branch breakers connected to the earth leakage breaker and connected as a load to a device that is always required to be energized,
One or more second branch breakers to which a load that can be turned on / off at any time is connected, and the earth leakage breaker is connected to the one or more second branch breakers, and a manual operation of an operation switch or a command from outside is performed. A control unit is provided for controlling ON / OFF of the second branch breaker in accordance with at least one of them.

[0008] The control unit may include the second switch regardless of a state of the operation switch and an external command.
A switch for bypassing to turn on all of the branch breakers can be provided together, or an on / off control signal from a fixed telephone or a mobile telephone via a telephone line can be used as the external command. Can be.

The operation switch can be installed at the entrance or its vicinity, or can be a no-fuse breaker whose circuit can be turned on / off by operating an operation handle.

The control unit includes a no-fuse breaker as the operation switch, a relay for energizing a coil when the no-fuse breaker is on, and a no-fuse breaker via a normally closed contact of the relay. And an indicator light connected to the input side of.

The control section and the operation switch can be integrated into one housing as an operation section and installed at the entrance or in the vicinity thereof.

As the low-voltage distribution line, a single-phase two-wire or three-phase
It can be a line.

According to the present invention configured as described above,
The first branch breaker is always energized,
The power is not supplied to the devices and outlets connected to the second branch breaker by turning off the operation switch or turning off the power supply by the control unit in response to an external command. Therefore, the equipment connected to the first branch breaker and requiring continuous power-on is continuously supplied with power, and the load that can be turned on / off at any time, such as a lighting fixture connected to the second branch breaker, is Since the power is turned off, devices that need to be continuously turned on operate without any trouble, and the occurrence of an accident such as a short circuit in other devices and the outlet is prevented, thereby improving safety. Then, since it is only necessary to operate the operation switch or to give a command from the outside, anyone can easily handle it.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. First, a first embodiment of the present invention will be described. FIG. 1 is a block diagram showing an indoor power distribution system according to the first embodiment of the present invention.

As shown in FIG. 1, an NFB 2 serving as a main breaker provided in a switchboard installed at a predetermined place in a house is connected to a service line 1 of a low-voltage distribution line, and a leak current is connected to the NFB 2. Circuit breaker 3 is connected.
The earth leakage breaker 3 includes a branch breaker (NFB) 4,
And an electromagnetic contactor (MC: Magnet Contactor) 5 are connected to the electromagnetic contactor 5, and a plurality of branch breakers (NF
B) 6, 7, 8, 9, 10, 11, 12 are connected. The branch breaker 4 includes a refrigerator a1, a home telephone a2, a video deck (VTR) a3, a facsimile (F
AX) a4, a gas leak sensor a5, and other devices that require continuous power-on are connected. Branch breaker 6-12
Are connected to lighting equipment, a television, various audio equipment, cooking utensils (not shown), and the like. An operation unit 14 is connected to the electromagnetic contactor 5 via an NFB 13, and the seven branch breakers 6 to 12 can be turned on / off simultaneously by turning on / off a switch 15.

Of the above, NFB 2, earth leakage breaker 3, branch breaker 4, electromagnetic contactor 5, branch breakers 6-1
2, and the NFB 13 are installed on the switchboard, and the operation unit 14 is installed indoors or outdoors near the entrance.

In the above configuration, an electric device or an electronic device (hereinafter, referred to as a device) connected to the branch breaker 4 includes:
The devices connected to the branch breakers 6 to 12 are connected in advance separately from each other.
1. Only devices requiring continuous power-on, such as the home telephone a2, VTRa3, FAXa4, and gas leak sensor a5, are connected.

Normally, the branch breaker 4 and the branch breakers 6 to 12 are on. When leaving home for going out, traveling, etc., when the switch 15 of the operation unit 14 installed at the entrance is turned off, the electromagnetic contactor 5 is turned off, and the branch breaker connected to the electromagnetic contactor 5 All of 6 to 12 are turned off at the same time. As a result, the power supply to the devices connected to the branch breakers 6 to 12 and the connection ports such as the outlets to which the devices are not connected are simultaneously turned off. However, since the branch breaker 4 is not controlled by the operation unit 14, the devices a1 to a5 connected to the branch breaker 4 remain on.

Accordingly, the various devices a1 to a5 connected to the branch breaker 4 continue to operate, and the devices and outlets connected to the branch breakers 6 to 12 are connected to the branch breakers 6 to 12 during the absence of going out or traveling. In a condition that could cause a short circuit accident in the outlet or equipment (dust accumulation,
Even if a foreign substance is mixed in, there is no possibility of causing a fire or other important matters.

When the resident who has been away has returned home, the switch 15 of the operation unit 14 is turned on. By this operation, the electromagnetic contactor 5 is remotely controlled, and a circuit is configured to control each of the earth leakage breaker 3 and the branch breakers 6 to 12. Thereby, the power supply to the branch breakers 6 to 12 is restarted.

Next, a second embodiment of the present invention will be described. FIG. 2 is a system diagram showing an indoor power distribution system according to the second embodiment of the present invention. In the present embodiment, FIG.
The same reference numerals are given to the same portions as those in the first embodiment described above, and the description thereof will be omitted, and different configurations will be mainly described.

In the present embodiment, as shown in FIG. 2, a switch 16 is connected in parallel with the electromagnetic contactor 5, so that even if the electromagnetic contactor 5 fails, the branch breakers 6 to 12 are connected.
Only the energization to is ensured. Like the relay, the electromagnetic contactor 5 has a structure that is turned on / off by a movable contact. Therefore, if contact failure of the contact or the like occurs, even if the excitation coil of the electromagnetic contactor 5 is energized, it can be used for many years. The contact may be turned off. In such a case, by turning on the switch 16, the electromagnetic contactor 5 is turned on.
Regardless of the operation / non-operation of the branch breakers 6 to 12
Can be energized to the devices connected to.

Next, a first embodiment of the present invention will be described. FIG. 3 is a circuit diagram showing an indoor power distribution system according to the first embodiment of the present invention.

As shown in FIG. 3, an NFB 2, an earth leakage breaker 3, and branch breakers 6 to 9 (these loads are referred to as circuits 1 to 4) are installed on a switchboard 20 connected to the service line 1. ing. The branch breakers 6 to 9 are installed on the switchboard 20, but are connected to the operation unit 14 without being connected to the earth leakage breaker 3. The operation unit 14 is configured to include the functions of the electromagnetic contactor 5 and the NFB 13 shown in FIGS. A branch breaker 4 is connected to the earth leakage breaker 3, and a load such as a refrigerator that needs to be constantly energized is connected to the branch breaker 4.

The operation unit 14 is connected to the earth leakage breaker 3,
An NFB 17 with an external operation handle having the functions of the NFB 13 and the switch 15; a relay coil (R) 18 connected to the NFB 17; a contact 18a of a relay coil 18 connected to one end on the input side of the NFB 17; And a red indicator light 19 (RL) connected to the other end of the input side of the NFB 17. The contact 18a is turned off when the relay coil 18 is excited, and turned on when the relay coil 18 is not excited. When the contact 18a is on, the red indicator light 19 is turned on.

The branch breaker 4 is connected to the earth leakage breaker 3
, But may be installed in the operation unit 14 as a branch breaker 4 'as shown in the figure. Although the number of branch breakers is shown as 6 to 9 corresponding to four circuits, any number can be set.

In the above configuration, when the NFB 2 and the earth leakage breaker 3 are operating normally, the NFB 17 is turned on / off.
In either case, power is supplied to the branch breaker 4 and power is supplied to appliances such as a refrigerator, an electronic telephone, a VTR, a FAX, and a gas leak sensor. Also,
When the NFB 17 is not operated (when it is turned on), the branch breakers 6 to 12 can be energized through the NFB 17 and lighting equipment and the like can be used. At this time,
The relay coil 18 is excited through the NFB 17, its contact 18a is turned off, and the red indicator light 19 is turned off.

Next, when leaving the house for going out, a business trip, a trip, etc., the NFB 1 is turned off so that the NFB 17 is turned off.
When the external operation handle 7 is operated, the NFB 17 is turned off, the power to the branch breakers 6 to 9 is cut off, the use of lighting equipment and the like becomes impossible, and the branch breakers 6 to
The power supply to the outlet connected to 9 is cut off. At the same time, the relay coil 18 is de-energized and the contact 18a is turned on, so that the red indicator light 19 is turned on. By turning on the red indicator light 19, the operator of the NFB 17 can know that the branch breakers 6 to 9 have been turned off. In this state, since the branch breaker 4 remains on, power is continuously supplied to appliances such as a refrigerator, a hot telephone, a VTR, a FAX, and a gas leak sensor.

As described above, according to the present embodiment, the NFB 1 is operated without operating the NFB on the switchboard as in the prior art.
7 is only turned off, the power supply is continued to the equipment that needs to be continuously supplied, and all the equipment that does not cause any problem even when the power supply is cut off including the branch breakers 6 to 9 when going out. It is possible to perform an on / off operation at the entrance or the like by a simple operation.

Next, a second embodiment of the present invention will be described. FIG. 4 is a circuit diagram showing an indoor power distribution system according to the second embodiment of the present invention.

In the second embodiment shown in FIG. 3, the lead-in line 1 is a single-phase two-wire, but the present embodiment is different from the second embodiment in that it is a single-phase three-wire as shown in FIG. The branch breakers correspond to 6 circuits as 6 to 11,
It can be set to any number. Since it is a single-phase three-wire, each of the drop wire 1, NFB2, earth leakage breaker 3, branch breaker 4, and NFB17 shown in FIG.
A single-phase three-wire service drop 31, NFB 32, earth leakage breaker 33, branch breaker 34, and NFB 35 are used. Further, the branch breakers 6 to 11 are also ones corresponding to single-phase three-wire. Furthermore, in order to clarify that the system is compatible with single-phase three-wires, the switchboard 20 for single-phase two-wire
Switched to switchboard 30 for wires.

The operation of the configuration shown in FIG. 4 is the same as that of the single-phase two-wire system and the single-phase three-wire system, but does not change the overall operation.

In the above embodiment and the above embodiment, the control of the electromagnetic contactor 5 is performed by the switch 15. However, as another embodiment, the electromagnetic contactor 5 can be controlled externally through a telephone line. For example, in the configuration shown in FIG. 3, a communication interface is connected to a telephone line of a telephone company such as NTT so that an output signal can be obtained through the communication interface. If the electromagnetic switch is turned on / off by an output signal (command) of the communication interface, even if the user forgets to operate the switch 15 when going out, In addition, the same control as the operation of the switch 15 can be performed from a mobile telephone such as a mobile telephone, a PHS, and a car telephone, in addition to a company telephone and a public telephone. In this case, if the NFB 17 is kept connected, the operation by the switch 15 and the control from the outside can be used together.

In the above configuration, each member can be freely replaced unless the gist of the present invention is changed. For example,
The red indicator light 19 may be any of a light bulb, a neon tube, and an LED with a built-in rectifier diode. Further, the relay coil 18 can be replaced with a thyristor or the like. Or NFB1
A mechanical changeover switch is mechanically linked to 7, 35,
A red indicator light 19 may be connected to this changeover switch. In this case, the relay coil 18 and the contact 18a become unnecessary. Further, although the relay coil 18 is provided in the operation unit 14, the relay coil 18 is connected to the switchboards 20, 30 (or
1 and 2). In addition, the present invention can be variously changed in design without departing from the basic technical idea.

[0035]

As described above, according to the indoor power distribution system of the present invention, the first branch breaker is always energized, and the second branch breaker is turned off by the operation switch or externally. The power can be turned off by the control unit in response to the command of, and power is not supplied to the equipment and the outlet connected to the second branch breaker, so that only the second branch breaker is connected. Since the applied load is turned off and devices that need to be continuously turned on can operate without any trouble, it is possible to prevent occurrence of accidents such as short-circuits in devices that do not need to be turned on and outlets. In addition, since the second branch breaker can be easily operated through operation of the operation switch or a telephone line, anyone can easily operate the second branch breaker.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an indoor power distribution system according to a first embodiment of the present invention.

FIG. 2 is a block diagram illustrating an indoor power distribution system according to a second embodiment of the present invention.

FIG. 3 is a circuit diagram showing an indoor power distribution system according to the first embodiment of the present invention.

FIG. 4 is a circuit diagram showing an indoor power distribution system according to a second embodiment of the present invention.

FIG. 5 is a block diagram showing a conventional indoor power distribution system.

[Explanation of symbols]

 1,31 Drop-in line 2,13,17,32,34,35 NFB 3 earth leakage breaker 4,6-12 branch breaker 5 electromagnetic contactor 14 operation unit 15,16 switch 18 relay coil 18a contact 19 red indicator light 20, 30 switchboard

Claims (8)

[Claims] 1. A main breaker connected to a low-voltage distribution line and installed in a building such as a house, an earth leakage breaker connected to the main breaker, and connected to the earth leakage breaker, and a power supply is always required. One or more first branch breakers to which the equipment to be connected is connected as a load;
One or more second branch breakers to which a load which can be turned off at any time is connected, and which is connected to the earth leakage breaker;
An indoor power distribution system, comprising: a control unit that controls on / off of the second branch breaker in response to at least one of an operation of an operation switch by a manual operation or an external command. 2. The control unit according to claim 1, further comprising a bypass switch for turning on all of the second branch breakers, regardless of a state of the operation switch and a command from the outside. The indoor power distribution system according to claim 1, wherein: 3. The indoor power distribution system according to claim 1, wherein the control unit uses an on / off control signal from a fixed telephone or a mobile telephone via a telephone line as the external command. method. 4. The indoor power distribution system according to claim 1, wherein the operation switch is installed at an entrance or in the vicinity thereof. 5. The indoor power distribution system according to claim 1, wherein the operation switch is a no-fuse breaker whose circuit can be turned on / off by operating an operation handle. 6. The non-fuse breaker as the operation switch, a relay whose coil is excited when the no-fuse breaker is on, and the no-fuse through a normally closed contact of the relay. The indoor power distribution system according to any one of claims 1 to 5, further comprising an indicator light connected to an input side of the breaker. 7. The indoor power distribution system according to claim 1, wherein the control unit and the operation switch are integrated into one housing as an operation unit, and are installed at an entrance or in the vicinity thereof. 8. The indoor power distribution system according to claim 1, wherein the low-voltage distribution line is a single-phase two-wire or a single-phase three-wire.