JP2010086791A - Wiring apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wiring apparatus which prevents power usage of the whole building from becoming over-use and supplies power to a load. <P>SOLUTION: A receptacle 1 being a wiring apparatus is provided with a switching part 2 to make conductive or shut off an electric path, a control part 4 to control opening and closing state of the switching part 2, and a signal communication part which is connected to a communication line ML and carries out communication with a power monitoring device 203. The signal communication part transmits to the control part 4 when it receives a power supply permission signal. Firstly, when power is supplied to a second load 120, the power monitoring device 203 determines whether the power usage is over-use or not, and when it is not over-use, transmits to the receptacle 1 the power supply permission signal. Then, the signal communication part of the receptacle 1 which has received the power supply permission signal transmits the power supply permission signal to the control part 4, and the control part 4 transmits a control signal to the switching part 2 so as to be a closed state. Then, the switching part 2 makes the electric path 20 in conduction to supply power to a first load 110. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a wiring device that supplies power when the amount of power used is equal to or less than a threshold value.

  Conventionally, as a wiring device such as an outlet for supplying power to a load, for example, a power supply is supplied immediately when a power plug of the load is inserted into a plug receptacle of the outlet, or when a leakage is detected, One that cuts off the supply of electric power is known (for example, see Patent Document 1). In addition, the distribution board in a house has a function of monitoring the amount of power used, and warns of overuse of power, or to a load designated in advance when the power is overused, such as an air conditioner. It is known to temporarily cut off the power supply. On the other hand, in a distribution board that does not have a function of monitoring the amount of power used, the main breaker and limiter perform a cut-off operation (trip) in order to prevent overcurrent and the like.

  A conventional configuration including a distribution board having a function of monitoring power consumption and a wiring device will be described with reference to FIG. A leakage breaker outlet (hereinafter referred to as an outlet) 100, which is a wiring device, is inserted into an electric circuit between a residential distribution board (hereinafter referred to as a distribution board) 200 and a load 110 connected to a single-phase three-wire commercial power supply AC. The The outlet 100 includes an opening / closing part 101 inserted in an electric circuit (power supply line L1, neutral line N, and ground line E), a zero-phase current transformer 102 that detects a leakage current flowing in the electric circuit, and an opening / closing part 101. And a control unit 103 that opens. The outlet 100 further includes a current detector 104 that detects a current flowing through the electric circuit and a voltage detector 105 that detects a voltage of the electric circuit. When the zero-phase current transformer 102 detects a leakage, the opening / closing unit 101 is opened to cut off power supply to the load 110.

The distribution board 200 includes a main breaker 201, a branch breaker 202, a power monitoring device 203, an overuse of power, and the like that are interposed in an electric circuit (power supply lines L1, L2, and neutral line N) from a commercial power supply AC. And a display unit 204 for warning. The distribution board 200 further includes a voltage detector 205 that detects the voltage of the electric circuit, and a current detector 206 that detects a current flowing through the electric circuit. The distribution board 200 temporarily shuts off the branch breaker 202 to which a preset load is connected when the power monitoring device 203 detects overuse of power.
JP 2006-48958 A

  By the way, loads such as water heaters that require relatively large electric power have become widespread in recent years. These loads often use late-night power, and when the late-night power period comes, power supply to the load is started, and the amount of power used in the house increases rapidly. Also, for example, when using another device that requires relatively large power, such as an IH cooking heater, the power to the load such as power supply to the water heater or charging of the electric vehicle when it becomes midnight power time zone Supply starts all at once, and the amount of electricity used in the house increases rapidly. In these cases, since the amount of power used in the house is overused, the power supply to a preset load is interrupted, or the main breaker and limiter in the house are tripped.

  The present invention has been made in view of the above problems, and provides a wiring device that can prevent the power consumption of the entire home from being overused and can supply power to the load. Objective.

  In order to achieve the above object, the invention of claim 1 has a function of detecting a power usage amount of a commercial power source and transmitting a power supply permission signal when the detected power usage amount is equal to or less than a preset threshold value. In a wiring device comprising: an opening / closing unit interposed between an electrical panel and a load, for energizing or interrupting an electrical path connecting the distribution board and the load; and a control unit for controlling the operation of the opening / closing unit, A communication path connected to the distribution board and performing signal communication with the distribution board; and a communication unit capable of receiving a power supply permission signal transmitted from the distribution board via the communication path, When the power supply permission signal is received by the communication unit when the electric circuit is interrupted by the opening / closing unit, the control unit controls the opening / closing unit to make the electric circuit conductive and to supply power to the load. Supply.

  According to the present invention, when the control unit receives the power supply permission signal when the electric circuit is interrupted by the opening / closing unit, the control unit controls the opening / closing unit to make the electric circuit conductive. Therefore, when power is supplied to the load, it is possible to prevent the power consumption of the entire home from being overused, so that the power supply to a specific load can be cut off as in the past, or the main breaker, etc. Can supply power to the load without tripping.

  Hereinafter, an earth leakage interruption outlet (wiring device) according to an embodiment of the present invention will be described with reference to FIGS. 1 to 3. As shown in FIG. 1, an earth leakage interruption outlet (hereinafter referred to as an outlet) 1 is interposed between a distribution board 200 having a function of monitoring the amount of power used by a commercial power supply AC and a first load 110. The outlet 1 includes an electric circuit 20 that supplies power to the first load 110, an opening / closing unit 2 that conducts or interrupts the electric circuit 20, a zero-phase current transformer 3 that detects a leakage current flowing through the electric circuit 20, and an opening / closing unit 2 And a control unit 4 for controlling the open / close state.

  The opening / closing unit 2 is normally in a closed state, and is opened by a control signal transmitted from the control unit 4, thereby conducting or blocking the electric path 20 to the first load 110. The zero-phase current transformer 3 is provided on the commercial power supply AC side with respect to the switching unit 2 of the electric circuit 20, and is disposed so that the electric circuit 20 penetrates the coil of the zero-phase current transformer 3, and the electric leakage that flows through the electric circuit 20 Detect current.

  The distribution board 200 includes a main breaker 201 interposed in an electric path from the commercial power source AC (power supply lines L1, L2, and neutral line N), branch breakers 202a to 202d connected to the main breaker 201, and a main breaker. 201 and a power monitoring device 203 interposed between the branch breaker 202b. In addition, the distribution board 200 further includes a display unit 204 on which a warning such as overuse of power is displayed by the power monitoring device 203, a voltage detector 205 that detects voltage, and a current detector 206 that detects current. And a second load 120 is connected via a branch breaker 202d. The power monitoring device 203 is connected to the outlet 1 via the communication path ML, detects the power usage amount by the commercial power supply AC, and permits power supply when the detected power usage amount is equal to or less than a preset threshold value. Send the signal to outlet 1.

  As shown in FIG. 2, in addition to the configuration described above, the outlet 1 flows through the power supply unit 5, the filter unit 6 that filters the signal of the leakage current, the leakage determination unit 7 that determines the leakage, and the electric circuit 20. A current detector 8 that detects current, a voltage detector 9 that detects the voltage of the electric circuit 20, an electric energy calculator 10 that calculates electric energy, and a signal communication unit 11 are provided.

  The control unit 4 transmits a control signal for controlling the opening / closing operation to the opening / closing unit 2 based on the signals transmitted from the leakage determination unit 7 and the signal communication unit 11. In addition, the control unit 4 transmits information on the amount of power transmitted from the power amount calculation unit 10 to the signal communication unit 11. The power supply unit 5 obtains power from a power line connected to the commercial power supply AC, and supplies power to the control unit 4, the leakage determination unit 7, the power amount calculation unit 10, the signal communication unit 11, and the like. The filter unit 6 outputs an output signal obtained by removing a high frequency component from the leakage current signal detected by the zero-phase current transformer 3 to the leakage determination unit 7.

  The leakage determination unit 7 determines whether or not there is a leakage based on the output signal output from the filter unit 6, and when the leakage is determined, instructs the control unit 4 to perform an interruption operation by the opening / closing unit 2. Specifically, a predetermined threshold level is compared with an output signal level, and when the output signal level exceeds the threshold level, it is determined that there is a leakage, and an instruction signal for opening the switching unit 2 to the control unit 4 Send.

  The current detector 8 is arranged so that the power supply line L1 of the electric circuit 20 penetrates the coil of the current detector 8, detects the current flowing through the power supply line L1, and supplies the detected current value to the power amount calculation unit 10. Supply. The voltage detector 9 is arranged so as to detect a potential difference between the power supply line L1 and the neutral line N of the electric circuit 20, detects a voltage, and supplies the detected voltage value to the electric energy calculation unit 10. The power amount calculation unit 10 calculates a power amount based on the current value supplied from the current detector 8 and the voltage value supplied from the voltage detector 9, and outputs the calculated power amount to the control unit 4. .

  The signal communication unit 11 is connected to the communication path ML and communicates with the power monitoring device 203. The signal communication unit 11 receives a signal such as a power supply permission signal transmitted from the power monitoring device 203 and controls the received signal. Send to part 4. In addition, the signal communication unit 11 transmits a signal indicating information on the amount of power calculated by the power amount calculation unit 10 to the power monitoring device 203.

  As illustrated in FIG. 3, the power monitoring device 203 includes a power amount calculation unit 211 that calculates a power amount from values detected by the voltage detection unit 205 and the current detection unit 206, and power output from the power amount calculation unit 211. A power amount determination unit 212 that determines whether or not the power is excessively used based on the amount information. The power monitoring apparatus 203 includes a signal communication unit 213 that communicates with the outlet 1 via the communication path ML, and a control unit 214 that controls each unit in the power monitoring apparatus 203.

  The power amount determination unit 212 determines whether or not the power is excessively used based on the amount of power output from the power amount calculation unit 211, and when the power amount determination unit 212 determines that the power is excessively used, notifies the control unit 214 of a signal to that effect. Send. Specifically, a predetermined threshold value is compared with the power amount output from the power amount calculation unit 211, and when this power amount exceeds the threshold value, it is determined that the power is excessively used.

  The control unit 214 does not transmit a control signal to the signal communication unit 213 when receiving a signal indicating that the power is excessively used from the power amount determination unit 212. That is, when the power is excessively used, the power supply permission signal is not transmitted to the outlet 1. On the other hand, when the signal indicating that the power is excessively used is not received from the power amount determination unit 212, that is, when the power amount is not excessively used, the control indicating that the power supply permission signal is transmitted to the outlet 1. The signal is transmitted to the signal communication unit 213. Further, the control unit 214 receives information received from the signal communication unit 213, for example, information on the power usage amount of the outlet 1, and causes the display unit 204 to display the received power usage value.

  Next, the power supply operation of the circuit configuration including the outlet 1 and the distribution board 200 configured as described above will be described with reference to the flowchart shown in FIG. Here, in the circuit configuration shown in FIG. 1, it is assumed that the open / close unit 2 is currently open and no power is supplied to the first load 110.

  For example, when power is supplied to the second load 120 in the midnight time zone (S1), the power monitoring apparatus 203 uses the power amount determination unit 212 to overuse the power usage amount calculated by the power amount calculation unit 211. It is determined whether or not (S2). As a result, if the power is not overused, that is, if the amount of power is equal to or less than the threshold (YES in S3), the control unit 214 sends a control signal indicating that the power supply permission signal is transmitted to the outlet 1 as the signal communication unit 213. The signal communication unit 213 transmits a power supply permission signal to the outlet 1 (S4).

  The signal communication unit 11 of the outlet 1 that has received the power supply permission signal transmits the power supply permission signal to the control unit 4 of the outlet 1, and the control unit 4 that has received this signal is in a closed state with respect to the opening / closing unit 2. A control signal is transmitted so as to become (S5). Then, power is supplied to the first load 110 by the opening / closing part 2 conducting the electric circuit 20 (S6) (S7).

  On the other hand, if the result of the determination in S2 is that the amount of electric power is excessively used (NO in S3), the process in S4 is not performed, so that the opening / closing unit 2 is in a state where the electric circuit 20 is interrupted, and the first load No power is supplied to 110. Therefore, for example, when the power supply to the second load 120 is completed and the power consumption is reduced, YES is obtained in S3, and the power supply to the first load 110 is started.

  As described above, according to the outlet 1 according to the present embodiment, when the control unit 4 receives the power supply permission signal when the electric circuit is interrupted by the opening / closing unit 2, the electric circuit 20 is controlled by controlling the opening / closing unit 2. Is made conductive. Therefore, when power is supplied to the first load 110, it is possible to prevent the power consumption of the entire home from being overused, so that the power supply to a specific load can be cut off as in the past, Power can be supplied to the load without the main breaker or the like tripping.

  In addition, this invention is not restricted to the structure of the said embodiment, A various deformation | transformation is possible in the range which does not change the meaning of invention. For example, in the above embodiment, the power supply permission signal may be transmitted / received using a dedicated signal line, PLC (power line carrier), or wireless communication. The power supply unit 5 may be a unit that forms a DC power supply from a battery and supplies power to each unit of the apparatus.

1 is a circuit diagram including a distribution board and a load using an outlet according to an embodiment of the present invention. The block diagram of the said outlet socket. The block diagram of the said electricity distribution panel. The flowchart which shows the operation | movement procedure of the opening / closing part by the said electricity distribution panel and an outlet socket. The circuit diagram containing the distribution board and load which used the conventional outlet.

1 Outlet (wiring device)
2 Opening / closing part 4 Control part 11 Signal communication part (communication part)
20 Electric circuit 200 Distribution board AC Commercial power ML Communication path

Claims (1)

It is interposed between a distribution board and a load having a function of detecting a power usage amount of a commercial power source and transmitting a power supply permission signal when the detected power usage amount is not more than a preset threshold value,
In a wiring device comprising: an opening / closing unit that energizes or interrupts an electric path connecting the distribution board and a load; and a control unit that controls the operation of the opening / closing unit
A communication path connected to the distribution board and performing signal communication with the distribution board;
A communication unit capable of receiving a power supply permission signal transmitted from the distribution board via the communication path;
When the power supply permission signal is received by the communication unit when the electric circuit is interrupted by the opening / closing unit, the control unit controls the opening / closing unit to make the electric circuit conductive and to supply power to the load. Wiring equipment characterized by supplying

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