JP5388346B2 - Apartment house main line current control system - Google Patents

Description

  The present invention is mainly used in an apartment house, and in a power wiring system in which a main breaker is installed in an electric circuit branched from a main line provided with a main line breaker to a plurality of dwelling units, a main line due to an increase in supply current to each dwelling unit The present invention relates to an apartment house main line current control system that suppresses breaker interruption.

  2. Description of the Related Art Conventionally, there is an apartment house main line current control system that individually restricts the current flowing through loads (for example, an air conditioner, a refrigerator, and a television) of each dwelling unit when an overcurrent flows through the main line. This type of system is disclosed in Patent Document 1, and in the system disclosed in this document, when a current exceeding a predetermined threshold flows through a main line for a predetermined time or more, load control corresponding to the current is performed. ing. That is, the apartment house trunk line current control system described in Patent Document 1 is intended to prevent the breaker of the wiring breaker installed in the single-phase three-wire distribution line, and the operation characteristics of the breaker and Compares the current flowing through the distribution line, detects that the current flowing through the distribution line reaches the operating current time range of the circuit breaker, and blocks the load of each dwelling unit of the apartment house (that is, shuts off the power to the load) I am doing so.

JP 2008-178275 A

  However, the apartment house main line current control system described in Patent Document 1 determines that the current flowing in one of the two power supply phases of the single-phase three-wire system reaches the operating current time region of the circuit breaker. Whether or not the load of the individual controlled unit is connected to the phase of the power source determined to reach the operating current time range of the circuit breaker (ie, the phase of the controlled power source). Therefore, there is a problem that loads that are not connected to the phase of the power source to be controlled are also cut off at the same time, causing unnecessary inconvenience for residents.

  The present invention has been made in view of such circumstances, and when the state where the main line current reaches the overcurrent region in the main line breaker reaches a specified time limit, the load is limited without limiting all the loads on the dwelling unit. An object of the present invention is to provide a multi-family house main line current control system that can be limited to a part.

  The apartment house trunk line current control system of the present invention is installed in each of a trunk line breaker installed on a trunk line that distributes power to a plurality of dwelling units, and an electric circuit branched from the trunk line for each dwelling unit downstream of the trunk line breaker. At least one of a limiter and a main breaker housed in a residential distribution board arranged on the main line, a main line current detecting means for detecting a main line current passing through the main line breaker for each power supply phase, and detected by the main line current detecting means First current determination means for determining whether or not a state where each of the main line currents for each power supply phase is an overcurrent region in the main line breaker has reached a specified time limit, and the limiter or the main breaker. It is determined that the time limit has been reached by the dwelling current detection means for detecting the dwelling current for each power supply phase and the first current determination means, and before When the current value detected by the dwelling unit current detection means becomes equal to or greater than a threshold value defined for the rated current of the limiter or main breaker, phase information indicating the power supply phase detected by the first current determination means is output. When the phase information is output from the second current determination unit and the second current determination unit, the load connected to the power supply phase indicated by the phase information among the loads provided in the dwelling unit Load control means for performing current limit control on the control unit.

  According to the above configuration, when the state in which the main line current is in the overcurrent region in the main line breaker reaches the specified time limit (the time limit specified according to the contracted current value), the phase of the power supply to be controlled Since the load to which the unit belongs is preferentially controlled, it is possible to limit the load subject to current limitation to a part of the load in each dwelling unit, thereby eliminating unnecessary inconvenience for the resident. For example, if an air conditioner is connected to the control target power phase and a microwave oven is connected to the non-control target power phase, only the air conditioner connected to the control target power phase performs current limiting. Can be used continuously.

  In the above configuration, the load control unit includes a phase setting unit that sets a power supply phase to which a load to be limited in current is connected, and includes the phase information output from the second current determination unit and the phase setting unit. The set setting information is compared, and if there is matching phase information, current limit control is performed.

  According to the above configuration, even if the load is connected to an arbitrary power supply phase, by setting the setting means in the connected power supply phase, when an overcurrent state occurs in the connected power supply phase, Current limit control can be reliably performed on the load connected to the power supply phase.

  The apartment house trunk line current control system of the present invention is installed in each of a trunk line breaker installed on a trunk line that distributes power to a plurality of dwelling units, and an electric circuit branched from the trunk line for each dwelling unit downstream of the trunk line breaker. At least one of a limiter and a main breaker housed in a residential distribution board arranged on the main line, a main line current detecting means for detecting a main line current passing through the main line breaker for each power supply phase, and detected by the main line current detecting means First current determination means for determining whether or not a state where each of the main line currents for each power supply phase is an overcurrent region in the main line breaker has reached a specified time limit, and the limiter or the main breaker. A dwell unit current detecting means for detecting a dwell unit current for each power supply phase and at least one load system for controlling the current supplied to the load. Means, phase setting means capable of setting the connection destination power supply phase for each load control means, and the first current determination means determines that the time limit has been reached, and is detected by the dwelling current detection means When the current value is equal to or greater than the threshold specified for the rated current of the limiter or main breaker, the phase information indicating the power phase is compared with the setting information for each load control means set by the phase setting means. And a second current determining means for selecting all matching load control means and giving a control command only to the selected load control means, wherein the load control means is a control command from the second current determining means. Is received, current limit control is performed on the load to be current limited.

  According to the above configuration, the phase setting means that can set phase information for each load control means is provided, and the phase information received by the second current determination means and the setting for each load control means set by the phase setting means. Compare information, select all matching load control means, give control commands only to the selected load control means, and limit the supply of current only to the load related to the power supply phase falling into overcurrent, so each In the load in the dwelling unit, the load that is the current restriction target can be limited to a part, and the inconvenience unnecessary for the resident is eliminated.

  The apartment house trunk line current control system of the present invention is installed in each of a trunk line breaker installed on a trunk line that distributes power to a plurality of dwelling units, and an electric circuit branched from the trunk line for each dwelling unit downstream of the trunk line breaker. At least one of a limiter and a main breaker housed in a residential distribution board arranged on the main line, a main line current detecting means for detecting a main line current passing through the main line breaker for each power supply phase, and detected by the main line current detecting means First current determination means for determining whether or not a state where each of the main line currents for each power supply phase is an overcurrent region in the main line breaker has reached a specified time limit, and the limiter or the main breaker. A dwell unit current detecting means for detecting a dwell unit current for each power supply phase and at least one load system for controlling the current supplied to the load. And the load control means notify that the current supply to the current limiting load has been restricted, notifies the first current judging means to that effect, and then the first current judging The phase information is stored by receiving phase information indicating the power supply phase to which the load subject to current limitation is connected from the means, the phase information indicating the power supply phase is received, and the first current determination means When receiving a load cutoff request control signal, the phase information included in the control signal is checked against the stored phase information for each load control means, the load control means to be current-limited is selected, and the selected load is selected. Second current determination means for giving a control command only to the control means, and when the first current determination means receives a notification that the current supply is restricted from the second current determination means, the main current is supplied to the power supply phase. The main current monitored separately Based on the determination result of the output means, the power supply phase with reduced current is detected, the detected phase information is transmitted to the second current determination means, and the load control means is controlled by the control command from the second current determination means. Is received, current limit control is performed on the current limit target load.

  According to the above configuration, not only the means for setting the phase information of each load limiting means can be omitted, but also the power supply phase detected by the first current determination means and the power supply phase detected by the second current determination means. Since the load control can be performed without being affected even if it is replaced, no setting is required without confirming the phase of the trunk current detection means at the time of construction. Thereby, construction which is simple and without mistakes is possible.

  In addition, even if the power supply phase of the load is changed due to a later connection change, the setting can be automatically updated by checking the phase information every time, so there is no need to forget to set it and maintainability Is also excellent.

  In the above configuration, the second current determination unit is configured to limit the load that is not connected to the power supply phase that matches the phase information included in the load cutoff request received from the first current determination unit. A control command for releasing the current limit is given to the means.

  According to the above configuration, when the current flowing in the power supply phase decreases, the load connected to only the power supply phase that has reached the recovery operation current time region can be controlled with priority, so the load control time can be shortened. Can do.

  In the above configuration, phase information storage means using a nonvolatile storage medium that stores the phase information is provided.

  According to the above configuration, since the power phase to which the current limit target load is connected is stored as information, loss of information due to a power failure or the like can be avoided, information reconstruction after power recovery is unnecessary, even immediately after power recovery, Unnecessary operations can be reduced.

  In the above-described configuration, the value of the current flowing through the power supply phase detected as needing current limitation by the first current determination unit and the value of the current flowing through the limiter or main breaker detected by the dwelling unit current detection unit are displayed. The display means is provided.

  According to the above configuration, since the value of the current flowing through the power supply phase detected by the first current determination unit and the value of the current flowing through the limiter or main breaker detected by the dwelling unit current detection unit are displayed, the resident This makes it easier to obtain a sense of satisfaction regarding the order in which the load is cut off.

  In the present invention, when the state in which the main line current is in the overcurrent region in the main line breaker reaches the specified time limit, the load unit of the dwelling unit is limited to a part without limiting, and the load not limited continues. Because it can be used, there will be no unnecessary inconvenience for residents.

The figure which shows schematically the installation state to the apartment house of the apartment house trunk line current control system which concerns on Embodiment 1 of this invention. The block diagram which shows schematic structure of the apartment house trunk line current control system which concerns on Embodiment 1 of this invention. The figure which shows the general view of the load control apparatus of FIG. The block diagram which shows schematic structure of the apartment house trunk line current control system which concerns on Embodiment 2 of this invention. The figure which shows the general view of the slave station of FIG. The block diagram which shows schematic structure of the apartment house trunk line current control system which concerns on Embodiment 3 of this invention. FIG. 6 is a sequence diagram for explaining the operation in the residential housing trunk line current control system of FIG.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments for carrying out the invention will be described in detail with reference to the drawings.

(Embodiment 1)
FIG. 1 is a diagram schematically showing an installation state of an apartment house trunk line current control system according to Embodiment 1 of the present invention in an apartment house, and FIG. 2 is an outline of the apartment house trunk line current control system according to the present embodiment. It is a block diagram which shows a structure.

  1 and 2, in the collective housing main line current control system of the present embodiment, two lines of main lines 10 are wired in the collective housing 100, and a main line breaker 20 is installed in each main line 10. It is assumed that each of the two main trunk lines 10 branches into a plurality of systems (four systems in the illustrated example). A limiter 31 and a main breaker 32 are housed in the residential distribution board 30 as internal units, respectively, and the limiter 31 and the main breaker 32 are connected to an electric circuit (hereinafter referred to as “dwelling unit line”) 11 branched from the main line 10 to each dwelling unit. Is installed.

  The trunk line 10 and the dwelling unit line 11 are single-phase three-wires each including a neutral line LN and power supply lines L1 and L2. The two main line breakers 20 are arranged together with the master station 40 in the common part 110 of the apartment house 100. In the main line 10, a current measuring device 50 using a CT (Current Transformer) is installed on each of the power lines L <b> 1 and L <b> 2 of the main line 10 on the downstream side of the main line breaker 20.

  The master station 40 includes a current measuring unit 401 that measures the main line current passing through the power lines L1 and L2 of the main line 10 from the outputs of the two current measuring devices 50, and the main line 10 measured by the current measuring unit 401. A current determination unit (first current determination unit) 402 that determines whether or not the state where the main line current in each of the power supply lines L1 and L2 is in the overcurrent region of the main line breaker 20 has reached a specified time limit, and current determination In the setting unit 403 for setting a threshold for determining that the main line current is an overcurrent in the unit 402, and in the current determination unit 402, both or one of the main line currents passing through the power lines L1 and L2 of the main line 10 is a main line breaker. When it is determined that the state of the 20 overcurrent region has reached the specified time limit, each residence that houses the main breaker 32 downstream of the main line breaker 20 And a communication unit 404 is housed which transmits a control signal to the residential distribution board 30 of 101. The time limit used in the current measuring unit 401 is a time defined according to the overcurrent region of the main line breaker 20. The two current measuring devices 50 and the current measuring unit 401 constitute a main line current detecting unit (main line current detecting means) 60.

  The communication unit 404 transmits a control signal triggered by the current determination unit 402 determining that the time limit has been reached. This control signal includes phase information indicating the power supply phase of the main line 10 that is overcurrent. That is, when only the main line current passing through the power line L1 of the main line 10 exceeds the overcurrent region of the main line breaker 20, and the state reaches a specified time limit, the main line current flowing through the power line L1 is in an overcurrent state. Therefore, phase information indicating the power supply line L1 is included. In addition, when only the main line current passing through the power line L2 of the main line 10 exceeds the overcurrent region of the main line breaker 20 and the state reaches the specified time limit, the main line current flowing through the power line L2 becomes the overcurrent state. Therefore, phase information indicating the power supply line L2 is included. Further, when both the main line currents passing through both the power line L1 and the power line L2 of the main line 10 exceed the overcurrent region of the main line breaker 20, and the state reaches a specified time limit, the power line L1 and the power line Since the main line current flowing through each of L2 is in an overcurrent state, phase information indicating the power supply line L1 and the power supply line L2 is included. Thus, the phase information transmitted from the communication unit 404 of the master station 40 is one of the three types of L1, L2, and L1 + L2.

  On the other hand, in addition to the limiter 31 and the main breaker 32, the residential distribution board 30 includes a branch breaker 33 installed in each of the dwelling unit wires 11 branched into a plurality of downstreams of the main breaker 32, and a current ( That is, a current measuring device 80 using a CT (Current Transformer) that detects the dwelling current used in each dwelling unit) upstream of the main breaker 32 is housed. That is, the current measuring device 80 is installed in each of the power supply lines L1 and L2 of the dwelling unit line 11.

  In each dwelling unit 101, a slave station 70 is installed in the vicinity of the residential distribution board 30. The slave station 70 may be stored in the residential distribution board 30. The slave station 70 includes a current measurement unit 701 that measures the dwelling unit current passing through the power supply lines L1 and L2 of the dwelling unit line 11 from the outputs of the two current measurement devices 80, and a current determination unit 402 of the parent unit 40. When it is determined that the specified time limit has been reached, and the current value of the dwelling current measured by the dwelling current detection unit 90 described later is equal to or greater than the threshold defined for the rated current of the main breaker 32, the master station 40 A current determination unit (second current determination unit) 702 that outputs power phase information determined by the current determination unit 402 to have reached the specified time limit, and a setting unit 703 that sets the threshold value in the current determination unit 702 And a communication unit 704 that communicates with the communication unit 404 of the master station 40 and receives a control signal transmitted from the communication unit 404 is housed. When the communication unit 704 of the slave station 70 receives the control signal transmitted from the communication unit 404 of the parent station 40, if phase information is included in the received control signal, the phase information is transferred to all load controls. To device 34. The two current measuring devices 80 and the current measuring unit 701 constitute a dwelling unit current detection unit (dwelling unit current detection means) 90.

  The trunk line 10 and the dwelling unit line 11 are used for the transmission path of the control signal between the communication unit 404 of the master station 40 and the communication unit 704 of the slave station 70. That is, the control signal is transmitted using the power line. This type of technology is known as power line communication (PLC), and in the present embodiment, only a control signal including phase information is sent, so low speed power line communication is sufficient. By transmitting the control signal using the power line communication technique, it is not necessary to separately wire the communication line. Moreover, even if it is an existing building, transmission of a control signal is attained by using the trunk line 10 and the dwelling unit line 11. A broken line 500 in FIG. 2 indicates a control signal path between the communication unit 404 of the master station 40 and the communication unit 704 of the slave station 70.

  Since the single-phase three-wire dwelling unit wire 11 is connected to the main breaker 32, the current measuring device 80 passes through each of the two power supply lines L1 and L2 except for the neutral wire LN, like the current measuring device 50. Detect the current to be. The current determination unit 702 restricts the current supplied to all the load control devices 34 to the load 200 when the current value of the dwelling unit current is equal to or greater than the threshold value defined for the rated current of the main breaker 32. Instruct. The prescribed threshold value is set to, for example, 50% of the rated current (of course, 50% is an example, and other ratios may be used). When the current value of the dwelling unit current is less than the threshold value, the current determination unit 702 does not instruct all the load control devices 34 to limit the current supplied to the load 200, and the current supplied to the load 200 is maintained as it is.

  The load control device 34 is housed in the residential distribution board 30 for each dwelling unit 101 and limits the current supplied to the load 200. That is, the load control device 34 is used when there is a load 200 whose current is to be limited, and is connected to the branch breaker 33 on the voltage line L1 side or the branch breaker 33 on the voltage line L2 side of the dwelling unit line 11. In the case of FIG. 2, the air conditioner (1) and the air conditioner (2) that are the loads 200 are connected to the power line L 2 side of the dwelling unit line 11.

  The load control device 34 is provided with a phase setting switch (phase setting means) 34A for setting a power supply phase to which the load 200 is connected. Since the phase information transmitted from the master station 40 is of three types, L1, L2, or L1 + L2, the phase setting switch 34A corresponds to these three types. FIG. 3 is a diagram showing an overview of the load control device 34. As shown in this figure, the phase setting switch 34A can set any one of L1, L2, and L1 + L2. In FIG. 3, it is set to L1 + L2.

  The load control device 34 compares the phase information given from the current determination unit 702 of the slave station 70 with the setting information of its own phase setting switch 34A, and cuts off the current to the load 200 connected to itself when they match. To do. In the case where the phase setting switch 34A is set to L1 + L2, if an overcurrent state occurs in any of the power supply lines L1 and L2, the current to all the loads 200 is cut off. Further, when the phase setting switch 34A is set to the power supply line L1 and the power supply line L1 enters an overcurrent state, the current is cut off from the load 200 connected to the power supply line L1. Further, when the phase setting switch 34A is set to the power supply line L2 and the power supply line L2 enters an overcurrent state, the current is cut off from the load 200 connected to the power supply line L2. In this way, the load control device 34 receives the phase information from the slave station 70, compares it with the setting information of its own phase setting switch 34A, and performs current interruption when the two coincide with each other. Only the related load 200 can be controlled to be cut off.

  The housing distribution board 30 of each dwelling unit 101 houses a display device (display means) 35 that indicates the state of the collective housing trunk line current control system of the present embodiment. In addition to the display and voice guidance indicating that the current is limited, the current value of the power supply phase detected by the current determination unit 702 of the slave station 70 (or the level information indicating the magnitude of the current value) and The current value detected by the dwelling current detection unit 90 of the power supply phase detected as an overcurrent (or the value replaced with level information indicating the magnitude of the current value) is displayed side by side. Residents can check this display to check the amount of current consumed in their dwelling unit when the load 200 is cut off, or conversely use the power source of the phase with a low mains current. The load 200 can be comfortably used without being restricted. Moreover, when setting the priority order to perform the blocking control for each of the plurality of loads 200, the resident can easily obtain a sense of satisfaction regarding the order of blocking.

  As described above, according to the apartment house trunk line current control system of the present embodiment, the master station 40 monitors the trunk line current for each power supply phase, and when the overcurrent occurs, the power line L1 in an overcurrent state, A control signal including phase information indicating L2 or L1 + L2 is transmitted to the slave station 70, and each of all the load control devices 34 connected to the slave station 70 receives the setting information and the child set by the own phase setting switch 34A. Since the phase information given from the master station 40 is compared via the station 70 and the supply of the current is limited if they match, it is possible to limit the current only for the load 200 related to the power supply phase that is in the overcurrent state. This eliminates unnecessary inconvenience for residents.

(Embodiment 2)
FIG. 4 is a block diagram showing a schematic configuration of an apartment house trunk line current control system according to Embodiment 2 of the present invention. 4 that are the same as those in FIG. 2 described above are denoted by the same reference numerals and description thereof is omitted.

  In the housing complex main line current control system according to the first embodiment described above, the phase information received by the current determination unit 702 of the slave station 70 from the master station 40 is given to all the load control devices 34, and each load control device 34 determines the current. The phase information given from the unit 702 and the setting information of its own phase setting switch 34A are compared, and if they match, the current supply is limited, but the collective housing trunk line current control system of the present embodiment is The slave station 70A has a phase setting switch 705 that can set phase information for each load control device 37, and the current determination unit 702A of the slave station 70A receives the phase information and the phase setting switch (phase setting means). ) The setting information for each load control device 37 set in 705 is compared, all matching load control devices 37 are selected, a control command is given only to the selected load control device 37, and an overcurrent occurs. Only load 200 relating to the power supply phase and performs a supply current limitation.

  FIG. 5 is a diagram showing an overview of the slave station 70A. As shown in FIG. 5, the slave station 70A has a phase setting switch that allows phase setting (L1, L2, L1 + L2) for each of the four loads 200. (For example, a DIP switch) 705 and a connector 70A1 for electrically connecting to each load control device 37.

  As described above, according to the apartment house trunk line current control system of the present embodiment, the master station 40 monitors the trunk line current for each power supply phase, and when an overcurrent occurs, a control signal including phase information is sent to each dwelling unit 101. Phase information received by the communication unit 704 by the current determination unit 702A of the slave station 70A of each dwelling unit 101 and setting information for each load control device 37 set by the phase setting switch 705 Are selected, all the matching load control devices 37 are selected, and a control command is given only to the selected load control device 37, so that the current supply is limited only to the load 200 related to the power supply phase in the overcurrent state. be able to. Further, compared to giving a control command including phase information to all the load control devices 37, only the selected load control device 37 is given a control command including only whether or not there is a restriction. There is also an advantage that communication can be simply reduced.

  In the present embodiment, a rotary switch can be used in addition to the above-described DIP switch as the phase information setting switch 705 for setting each phase of the plurality of load control devices 37. By using a DIP switch or a rotary switch, the setting can be performed at a time. Also in the present embodiment, priority may be given to each of the plurality of load control devices 37, and current supply to each load 200 may be restricted according to the priority.

(Embodiment 3)
FIG. 6 is a block diagram showing a schematic configuration of an apartment house main line current control system according to Embodiment 3 of the present invention. 6 that are the same as those in FIG. 2 described above are denoted by the same reference numerals and description thereof is omitted.

  The apartment house main line current control system according to the present embodiment includes a slave station 70B having a phase information storage unit (phase information storage means) 707 using a nonvolatile storage medium that stores phase information for each load control device 37B. . In this system, as shown in the sequence diagram of FIG. 7, when the load control device 37 </ b> B cuts off the current supply to the load 200, the current determination unit 702 </ b> B of the slave station 70 </ b> B informs that effect. When the current determination unit 402 of the master station 40 receives the load limitation notification, the monitoring result of the main line current detection unit 60 that monitors the main line current for each power supply phase is received. Based on the power supply phase, the power supply phase to which the load 200 is connected is detected, the power supply phase to which the load 200 is connected is determined, and the phase information is returned to the current determination unit 702B of the slave station 70B.

  The current determination unit 702B can know the phase information of the load control device 37B by receiving the phase information returned from the current determination unit 402. That is, it can be known to which power supply phase the load control device 37B is connected. This can be said for all the load control devices 37B that have notified the load limitation.

  The current determination unit 702B stores the received phase information in the phase information storage unit 707. Thereafter, when a load cutoff request control signal is received again from the current determination unit 402 due to the occurrence of an overcurrent, the phase information included in the control signal and each load control device 37B stored in the phase information storage unit 707 are received. The load control device 37B to be restricted is selected by collating with the phase information. Then, a control command is given only to the selected load control device 37B. As a result, only the load 200 related to the power supply phase falling into the overcurrent can be limited in current supply.

  In the apartment house main line current control system of the present embodiment, not only the means for setting the phase information of each load limiting device 37B can be omitted, but also the phase of the power source detected by the current determination unit 402 of the master station 40 and the slave station Even if the phase of the power source detected by the current determination unit 702B of 70B is switched, load control can be performed without any influence, so that no setting is required without confirming the phase of the main current detection unit 60 during construction. . Thereby, construction which is simple and without mistakes is possible.

  In addition, even if the power supply phase of the load is changed due to a later connection change, the setting can be automatically updated by checking the phase information every time, so there is no need to forget to set it and maintainability Is also excellent.

  As a matter of course, since the phase information cannot be obtained in the initial energization state, the current determination unit 702B of the slave station 70B does not use the phase information sent from the current determination unit 402 of the master station 40, and the load control device The load control command is sent to 37 sequentially. For this reason, the slave station 70B includes a phase information storage unit 707 that uses a nonvolatile storage medium. By storing the phase information in the phase information storage unit 707, efficient load control can be performed even after the first power recovery due to information loss due to power failure or the like.

10 trunk line 11 dwelling unit line 20 trunk line breaker 30 residential distribution board 31 limiter 32 main breaker 33 branch breaker 34, 37, 37B load control device 34A, 705 phase setting switch 35 display device 40 master station 50, 80 current measurement device 60 trunk line current Detection unit 70, 70A, 70B Slave station 90 Dwelling current detection unit 100 Apartment house 101 Dwelling unit 110 Shared part 200 Load 401 Current measurement unit 402 Current determination unit 403 Setting unit 404 Communication unit 701 Current measurement unit 702, 702A, 702B Current determination unit 703 Setting unit 704 Communication unit 707 Phase information storage unit

Claims (7)

A main breaker installed on the main line that distributes power to multiple units,
At least one of a limiter and a main breaker housed in a residential distribution board placed in each dwelling unit, installed in each of the electric circuits branched from the main line for each dwelling unit downstream of the main line breaker,
A main line current detecting means for detecting a main line current passing through the main line breaker for each power supply phase;
First current determination means for determining whether or not a state where each of the main line currents detected by the main line current detection means is an overcurrent region in the main line breaker has reached a specified time limit;
Dwelling unit current detection means for detecting the dwelling unit current passing through the limiter or the main breaker for each power supply phase;
When it is determined that the time limit has been reached by the first current determination unit, and the current value detected by the dwelling unit current detection unit is equal to or greater than a threshold value defined for the rated current of the limiter or the main breaker, Second current determination means for outputting phase information indicating the power supply phase detected by the first current determination means;
Load control for performing current limit control on a load connected to the power supply phase indicated by the phase information among the loads provided in the dwelling unit when the phase information is output from the second current determination unit Means,
Apartment house mains current control system equipped with.   The load control means includes phase setting means for setting a power supply phase to which a load to be limited in current is connected, and the phase information output from the second current determination means and the setting set by the phase setting means The apartment house main line current control system according to claim 1, wherein the current limit control is performed when the information is compared and there is matching phase information. A main breaker installed on the main line that distributes power to multiple units,
At least one of a limiter and a main breaker housed in a residential distribution board placed in each dwelling unit, installed in each of the electric circuits branched from the main line for each dwelling unit downstream of the main line breaker,
A main line current detecting means for detecting a main line current passing through the main line breaker for each power supply phase;
First current determination means for determining whether or not a state where each of the main line currents detected by the main line current detection means is an overcurrent region in the main line breaker has reached a specified time limit;
Dwelling unit current detection means for detecting the dwelling unit current passing through the limiter or the main breaker for each power supply phase;
At least one load control means for controlling to limit the current supplied to the load;
Phase setting means capable of setting a power supply phase of a connection destination for each load control means;
When it is determined that the time limit has been reached by the first current determination unit, and the current value detected by the dwelling unit current detection unit is equal to or greater than a threshold value defined for the rated current of the limiter or the main breaker, The phase information indicating the power phase is compared with the setting information for each load control means set by the phase setting means, all matching load control means are selected, and a control command is given only to the selected load control means Second current determining means,
When the load control unit receives a control command from the second current determination unit, the load control unit performs current limit control on a load to be current limited. A main breaker installed on the main line that distributes power to multiple units,
Installed in each of the electric circuits branched from the main line for each dwelling unit downstream of the main line breaker, the main breaker at least one of a limiter and a main breaker housed in a residential distribution board arranged in each dwelling unit,
A main line current detecting means for detecting a main line current passing through the main line breaker for each power supply phase;
First current determination means for determining whether or not a state where each of the main line currents detected by the main line current detection means is an overcurrent region in the main line breaker has reached a specified time limit;
Dwelling unit current detection means for detecting the dwelling unit current passing through the limiter or the main breaker for each power supply phase;
At least one load control means for controlling to limit the current supplied to the load;
When the load control means informs that the current supply to the load subject to current restriction is restricted, the load control means notifies the first current judging means to that effect, and then the first current judging means The phase information indicating the power supply phase connected to the load to be limited by current is received, the phase information is stored, the phase information indicating the power supply phase is received, and the load is cut off from the first current determination means. When the requested control signal is received, the phase information included in the control signal is compared with the stored phase information for each load control means, the load control means to be current-limited is selected, and the selected load control means And a second current determining means for giving only a control command,
When the first current determination unit receives a notification that the current supply is limited from the second current determination unit, the current decrease based on the determination result of the main line current detection unit that monitors the main line current for each power phase. Detected power phase, and transmits the detected phase information to the second current determination means,
When the load control unit receives a control command from the second current determination unit, the load control unit performs a current limit control on the current limit target load.   The second current determination unit is configured to control the load control unit that targets a load that is not connected to the power supply phase that matches the phase information included in the load cutoff request received from the first current determination unit. The apartment house trunk line current control system according to claim 4 which gives a control command for canceling current limitation.   The apartment house trunk line current control system according to claim 4 or 5, further comprising phase information storage means using a nonvolatile storage medium for storing the phase information.   Display means for displaying the value of the current flowing through the power supply phase detected as requiring current limitation by the first current judging means and the value of the current flowing through the limiter or main breaker detected by the dwelling unit current detecting means; The apartment house main line current control system according to any one of claims 1 to 6 provided.

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