JP2009158196A - Circuit breaker - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a circuit breaker for preventing a load from being broken by incorrect wire connection. <P>SOLUTION: The circuit breaker includes a high potential side power supply terminal 10H and a low potential side power supply terminal 10L which are respectively connected to the high potential side and the low potential side of a DC power supply, a pair of switching means 20 which are respectively inserted between the high potential side power supply terminal 10H and a load terminal 11H corresponding to the high potential side power supply terminal 10H and between the low potential side power supply terminal 10L and a load terminal 11L corresponding to the low potential side power supply terminal 10L, an incorrect connection detection means 3 which outputs a detection signal to show an incorrect connection when the polarity of the high potential side power supply terminal 10H and the polarity of the low potential side power supply terminal 10L is a reversed polarity, and a control means 4 which releases each of the pair of switching means 20 when the detection signal is input. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a circuit breaker inserted in a power feeding path between a DC power supply and a load.

2. Description of the Related Art Conventionally, a circuit breaker interposed in a circuit from a DC power source to a load (DC load) has been provided. As this type of circuit breaker, there has been proposed a double-cut type circuit breaker that cuts off the electric circuit on both the high potential side and the low potential side of the DC power supply. For example, in Patent Document 1, a first fixed contact provided with a first fixed contact, a second fixed contact provided with a second fixed contact, an arc extinguishing device, and an operation of a handle are first fixed in a case. An open / close mechanism that opens and closes the contact and the first movable contact, the second fixed contact and the second movable contact, and an abnormal current detection unit made of a bimetal is disclosed. According to the type of circuit breaker, the DC power source and the load can be electrically completely disconnected.
JP-A-10-154448 (refer to paragraphs [0014] to [0019] and FIGS. 1 and 2 in particular)

  By the way, the DC power supply is not switched between the high potential side and the low potential side, unlike the AC power supply in which the high potential side and the low potential side are switched with time. A load using a DC power supply is provided with a terminal connected to the high potential side of the DC power supply and a terminal connected to the low potential side, and depending on the voltage applied between these terminals. The load operates.

  Therefore, connect the terminal that should be connected to the high potential side of the DC power supply to the low potential side and the terminal that should be connected to the low potential side of the DC power supply to the high potential side in the load. When is applied, stress is applied to the load, and the load may be destroyed.

  Therefore, when using the circuit breaker described above, it is necessary to pay attention to erroneous connection (incorrect connection) between the power supply and the circuit breaker. Here, examples of erroneous connection include (1) connecting the high potential side and the low potential side of the DC power supply in reverse, and (2) connecting the AC power supply instead of the DC power supply.

  The present invention has been made in view of the above points, and an object of the present invention is to provide a circuit breaker that can prevent a load from being destroyed by incorrect connection.

  In order to solve the above-described problem, in the invention of claim 1, a high potential side power supply terminal and a low potential side power supply terminal connected to the high potential side and the low potential side of the DC power supply, respectively, a high potential side power supply terminal, Circuit breaker provided with a pair of switching means inserted between the load terminal corresponding to the high potential side power supply terminal and between the low potential side power supply terminal and the load terminal corresponding to the low potential side power supply terminal When the polarity of the high-potential side power supply terminal and the low-potential side power supply terminal is opposite, the misconnection detection means for outputting a detection signal indicating that the connection is incorrect, and the detection signal is input. Then, a control means for releasing each of the pair of opening / closing means is provided.

  According to the first aspect of the present invention, the low potential side power supply terminal is connected to the high potential side of the DC power supply and the high potential side power supply terminal is connected to the low potential side (the electric wires are connected in reverse), or the AC power supply is connected to the high potential side. In case of incorrect connection such as connecting each of the potential side power supply terminal and the low potential side power supply terminal, the polarity of the high potential side power supply terminal and the low potential side power supply terminal is reversed. When a detection signal indicating that the connection is incorrect is output, the control means that has received the detection signal releases the opening and closing means and disconnects the load terminal from the high potential side power supply terminal and the low potential side power supply terminal. Thus, since the power supply to the load is stopped, it is possible to prevent the load from being destroyed by incorrect connection.

  The invention of claim 2 is characterized in that in the invention of claim 1, there is provided an informing means for informing that the connection is incorrect.

  According to the invention of claim 2, since it is possible to notify that an erroneous connection has been made, it is possible to promptly restart the connection.

  The invention according to claim 3 corresponds to the high potential side power supply terminal and the low potential side power supply terminal connected to the high potential side and the low potential side of the DC power supply, respectively, the high potential side power supply terminal, and the high potential side power supply terminal. A circuit breaker comprising a pair of switching means inserted between a load terminal and between a low potential side power supply terminal and a load terminal corresponding to the low potential side power supply terminal, the high potential side power supply When the polarity of a terminal and a low potential side power supply terminal is reverse polarity, it is provided with the misconnection notification means which alert | reports that it is a misconnection.

  According to the invention of claim 3, the low potential side power supply terminal is connected to the high potential side of the DC power supply and the high potential side power supply terminal is connected to the low potential side (the electric wires are connected in reverse), or the AC power supply is connected to the high potential side. In case of incorrect connection such as connecting the potential side power supply terminal and the low potential side power supply terminal to each other, the polarity of the high potential side power supply terminal and the low potential side power supply terminal is reversed, so that the erroneous connection notification means Since the notification is performed, it is possible to promptly restart the connection, and it is possible to prevent the load from being destroyed by the incorrect connection.

  According to a fourth aspect of the present invention, in the first or second aspect of the present invention, the apparatus includes a power generation unit that generates an operation power source for the erroneous connection detection unit and the control unit. The power generation unit includes the high-potential-side power supply terminal and the power supply unit. A full-wave rectifier circuit in which a voltage applied between a low-potential-side power supply terminal is applied between input terminals, and the operation power supply is generated based on an output voltage of the full-wave rectifier circuit. To do.

  According to the invention of claim 4, since the output voltage of the full-wave rectifier circuit is an absolute value of the voltage (input voltage) applied between the input terminals, the high-potential side power supply terminal and the low-potential side power supply terminal Even when the polarity is reversed or an AC power supply is connected, the output voltage of the full-wave rectifier circuit takes a positive value, so even if an incorrect connection is made, the incorrect connection detection means and the control means An operating power supply can be generated, the erroneous connection detection means and the control means can be operated reliably, and a battery for supplying the operating power is not required.

  According to a fifth aspect of the present invention, in the third aspect of the invention, the power generation unit includes a power generation unit configured to generate an operating power for the erroneous connection notification unit, and the power generation unit is provided between the high potential side power supply terminal and the low potential side power supply terminal. And a full-wave rectifier circuit applied between the input terminals, and the operation power supply is generated based on an output voltage of the full-wave rectifier circuit.

  According to the invention of claim 5, since the output voltage of the full-wave rectifier circuit is an absolute value of the voltage (input voltage) applied between the input terminals, the high-potential side power supply terminal and the low-potential side power supply terminal Even if the polarity is reversed or an AC power supply is connected, the output voltage of the full-wave rectifier circuit takes a positive value. It is possible to generate the erroneous connection notification without fail, and a battery or the like for supplying operation power is not necessary.

  The present invention has an effect that the load can be prevented from being destroyed by erroneous connection.

(Embodiment 1)
As shown in FIG. 1, the circuit breaker of this embodiment includes a high potential side power supply terminal 10H and a low potential side power supply terminal 10L connected to a high potential side and a low potential side of a DC power supply (not shown), respectively. The container 1 is provided with a load terminal 11H corresponding to the high potential side power supply terminal 10H and a load terminal 11L corresponding to the low potential side power supply terminal 10L. The container 1 is made of a resin molded product formed of an insulating resin material (for example, a phenol resin).

  The high-potential side power supply terminal 10H and the low-potential side power supply terminal 10L provided in the container body 1 are formed in such a form that a connection member such as an electric wire or a conductive bar used for connection to a DC power supply can be connected to the load terminal. 11H and 11L are formed in such a shape that a connecting member such as an electric wire used for connection with a load (a load driven by DC power) can be connected. Since these terminals 10H, 10L, 11H, and 11L can adopt conventionally well-known terminals, detailed description thereof is omitted.

  Such a container 1 includes a pair of opening / closing means 20 inserted between the high-potential-side power supply terminal 10H and the load terminal 11H and between the low-potential-side power supply terminal 10L and the load terminal 11L, 1 includes an operation handle (not shown) for manual operation attached to be freely displaceable (for example, rotatable), and opens and closes each of the pair of opening / closing means 20 according to the operation of the operation handle. 21 and a tripping device 22 for forcibly opening (releasing) each of the pair of opening / closing means 20 are accommodated, and the contact portion 2 is constituted by these.

  Here, the opening / closing means 20 is composed of a mechanical contact composed of a fixed contact (not shown) fixed to the container 1 and a movable contact (not shown) that contacts and separates from the fixed contact. The open / close mechanism 21 mechanically couples a fixed terminal plate to which the fixed contact of the open / close means 20 is fixed, a movable contact to which the movable contact of the open / close means 20 is fixed, a spring material, a locking member, and the like. The opening / closing means 20 is opened and closed according to the operation of the manual operation handle. The tripping device 22 forcibly opens the opening / closing means 20 by the opening / closing mechanism section 21. For example, the tripping device 22 includes a cylindrical coil bobbin, a coil wound around the outer peripheral surface of the coil bobbin, and one axial end side in the coil bobbin. A fixed iron core provided in the coil, a movable iron core (plunger) slidably provided in the axial direction on the other axial end side in the coil bobbin, and a coil interposed between the fixed iron core and the movable iron core An electric trip device including a return spring made of a spring, etc., when the coil is energized, the movable iron core moves to the fixed iron core side, so that the movable contact of the switching means 20 is detached from the fixed contact. It has become. In addition, since the structure of the contact part 2 mentioned above (structure of the opening / closing means 20, the opening / closing mechanism part 21, and the tripping device 22) can be employed conventionally, detailed description is omitted.

  Further, the container 1 includes an erroneous connection detection means 3 for outputting a detection signal indicating an erroneous connection when the polarity of the high potential side power supply terminal 10H and the low potential side power supply terminal 10L is opposite, A control means 4 for releasing each of the pair of opening / closing means 20 when the detection signal is inputted, and a power generation means 5 for generating an operating power supply for the misconnection detection means 3 and the control means 4 are housed.

  The power supply generation means 5 generates operating power for the misconnection detection means 3 and the control means 4 based on the voltage applied between the high potential side power supply terminal 10H and the low potential side power supply terminal 10L. A full-wave rectifier circuit 50 including a diode bridge or the like is included. One input terminal of the full-wave rectifier circuit 50 is connected between the high potential side power supply terminal 10H and the load terminal 11H via the resistor R50, and the other input terminal is connected between the low potential side power supply terminal 10L and the load terminal 11L. Connected between. A large-capacitance capacitor C such as an electrolytic capacitor is connected between the output terminals of the full-wave rectifier circuit 50, and a series circuit of two Zener diodes ZD50 and ZD51 is connected to the capacitor C so that the high potential side of the capacitor C is a cathode. Side and low potential side are connected in parallel with the anode side. Further, a high potential side output terminal 51 is provided at the cathode of the Zener diode ZD50, a low potential side output terminal 52 is provided at the anode of the Zener diode ZD51, and a ground terminal 53 is provided at a connection point between the Zener diode ZD50 and the Zener diode ZD51. The high-potential side output terminal 51 can provide a potential Vcc, the low-potential side output terminal 52 can provide a potential −Vcc, and the ground terminal 53 can provide a potential (ground potential) GND. The circuit configuration of the power generation unit 5 is not limited to the illustrated example, and may be appropriately changed to a circuit configuration that can obtain the same effect.

  As shown in FIG. 1, the misconnection detection means 3 has an operational amplifier 30 that constitutes a differential amplifier circuit. The inverting input terminal (minus terminal) of the operational amplifier 30 is connected between the high-potential side power supply terminal 10H and the load terminal 11H via the resistor R30, and is connected to the output terminal of the operational amplifier 30 via the resistor R31. Yes. The non-inverting input terminal (plus terminal) of the operational amplifier 30 is connected between the low potential side power supply terminal 10L and the load terminal 11L via the resistor R32, and is connected to the ground terminal 53 via the resistor R33. Thus, a differential amplifier circuit is configured in which the potential of the high potential side power supply terminal 10H is input to the minus terminal and the potential of the low potential side power supply terminal 10L is input to the plus terminal. Here, the resistance values of the resistors R30, R31, R32, and R33 are all equal. Therefore, if the output of the differential amplifier circuit, that is, the potential of the output terminal of the operational amplifier 30 is Vout, the potential of the high potential side power supply terminal 10H is VH, and the potential of the low potential side power supply terminal 10L is VL, Vout = VL−VH. It becomes.

  When the connection is correctly performed, that is, when the polarity is not reverse, VH> VL and Vout takes a negative value, but the polarity of the high potential side power supply terminal 10H and the low potential side power supply terminal 11H is reverse polarity. In this case, since VH <VL, Vout takes a positive value. The positive side power input terminal of the operational amplifier 30 is connected to the high potential side output terminal 51 of the power source generating means 5, and the negative side power input terminal is connected to the low potential side output terminal 52. Power is supplied.

  The output terminal of the operational amplifier 30 is connected to the non-inverting input terminal of the comparator 31. The inverting input terminal of the comparator 31 is connected to the high-potential side output terminal 51 through the resistor R34, and is connected to the ground terminal 53 through the Zener diode ZD30. As a result, a threshold value Vref (where Vref is a positive value) used to determine whether or not the polarity is reversed is input to the inverting input terminal of the comparator 31. Note that the positive power input terminal of the comparator 31 is connected to the high potential output terminal 51 of the power generating means 5, and the negative power input terminal is connected to the ground terminal 53.

  The comparator 31 outputs an “L” level signal when the output Vout of the differential amplifier circuit is lower than the threshold value Vref, and “H” when the output Vout of the differential amplifier circuit exceeds the threshold value Vref. A level signal is output.

  Here, since Vref is a positive value, when it is not reverse polarity, since Vout is a negative value, no signal of “H” level is output from the comparator 31, but it is reverse polarity. In some cases, Vout has a positive value. Therefore, when Vout exceeds Vref, the comparator 31 outputs an “H” level signal. In other words, the comparator 31 determines that the polarity is reversed when the output Vout of the differential amplifier circuit exceeds the predetermined threshold value Vref, and constitutes a determination unit that outputs a detection signal composed of an “H” level signal. ing.

  The control means 4 is configured using, for example, a CPU or a logic circuit. The control means 4 is connected with a notifying means 6 for notifying that the connection is incorrect and a current detecting means 7.

  Here, the notification means 6 includes a display unit 60 that performs visual notification and a sounding unit 61 that performs auditory notification. As the display unit 60, a light emitting diode, a neon lamp, or the like can be used. As the ringing unit 61, a buzzer, a speaker, or the like can be used. The body 1 has a window (not shown) for emitting light emitted from the display unit 60 to the outside, and a sound hole (not shown) for transmitting the sound wave generated by the ringing unit 61 to the outside. ) Is provided.

  The current detection means 7 detects the value of the current flowing between the high potential side power supply terminal 10H and the load terminal 11H and outputs the detection result to the control means 4. For example, using a current transformer It is configured. The current detecting means 7 may be one that detects current using the voltage across a resistor inserted between the high-potential-side power supply terminal 10H and the load terminal 11H. Can be adopted.

  When the detection signal output from the misconnection detection means 3 (the “H” level signal output from the comparator 31) is input to the control means 4, the control device 4 operates the tripping device 22, thereby each of the pair of opening / closing means 20. The display unit 60 of the notification means 6 is turned on and the sounding unit 61 is sounded. Here, after the detection signal is input, the control unit 4 continues the notification by the notification unit 6 even if an “L” level signal is input from the erroneous connection detection unit 3. When the reset button or the like not operated is operated, the notification by the notification means 6 is terminated.

  Further, the control means 4 determines whether or not an overcurrent has occurred based on the detection result of the current detection means 7. Here, overload current and short circuit current are taken into consideration as overcurrent. The control means 4 includes a first threshold for determining an overload current (a value approximately equal to the rated current value of the circuit breaker), a second threshold for determining a short-circuit current (a value greater than the first threshold), When the current value detected by the current detection means 7 is greater than or equal to the second threshold value, it is determined that a short-circuit current has occurred. In addition, the control unit 4 determines that an overload current is generated when the state in which the current value detected by the current detection unit 7 is in excess of the first threshold and less than the second threshold is continued for a predetermined time. To do. When the control means 4 determines that either an overload current or a short-circuit current has occurred (that is, an overcurrent has occurred), the control means 4 operates the tripping device 22 and opens the pair of opening / closing means 20. Forced release. A power source for driving the control unit 4 (including a power source for the control unit 4 to flow a predetermined current through the coil and a power source necessary for turning on the display unit 60 and ringing the ring unit 61) It is provided by the power generation means 5.

  The circuit breaker according to the present embodiment is configured as described above. Next, the operation at the time of connection will be described. First, referring to FIG. 2, a case where the high potential side power supply terminal 10H is connected to the high potential side of the DC power supply and the low potential side power supply terminal 10L is connected to the low potential side (that is, correctly wired) will be described. To do. When the above connection is performed at time t1, the potential VH of the high potential side power supply terminal 10H viewed from the potential VL of the low potential side power supply terminal 10L is a positive value as shown in FIG. At this time, the output Vout of the operational amplifier 30 of the misconnection detection means 3 becomes a negative value as shown in FIG. 2B and falls below the threshold value Vref, so that the misconnection detection means as shown in FIG. 3 outputs an “L” level signal. In this case, since the control means 4 does not operate the tripping device 22, the opening / closing means 20 is not released.

  Next, referring to FIG. 3, the high potential side power supply terminal 10H is connected to the low potential side of the DC power supply, and the low potential side power supply terminal 10L is connected to the high potential side (that is, the wire connection is reversed). Will be described. When the above-described connection is performed at time t2, the potential VH of the high potential side power supply terminal 10H viewed from the potential VL of the low potential side power supply terminal 10L is a negative value as shown in FIG. At this time, the output Vout of the operational amplifier 30 of the misconnection detection means 3 becomes a positive value as shown in FIG. 3B, and when it exceeds the threshold Vref, as shown in FIG. 3C, the misconnection detection means. 3 outputs an “H” level signal. In this case, the control means 4 operates the tripping device 22 so that the opening / closing means 20 is released and the notification by the notification means 6 is performed.

  Finally, with reference to FIG. 4, a case where a circuit breaker is connected to an AC power supply (that is, a wrong connection that the power supply type is wrong) will be described. When the above connection is performed at time t3, an alternating voltage is applied between the low potential side power supply terminal 10L and the high potential side power supply terminal 10H, and positive and negative appear alternately as shown in FIG. . At this time, the output Vout of the operational amplifier 30 of the misconnection detection means 3 becomes a value whose phase is shifted by 180 degrees as shown in FIG. 4B, and when it exceeds the threshold Vref (time t4), the output Vout in FIG. As shown, an “H” level signal is output from the misconnection detection means 3. In this case, the control means 4 operates the tripping device 22 so that the opening / closing means 20 is released and the notification by the notification means 6 is performed.

  According to the circuit breaker of the present embodiment described above, the low potential side power supply terminal 10L is connected to the high potential side of the DC power supply, and the high potential side power supply terminal 10H is connected to the low potential side, or the high potential is connected to the AC power supply. In the case of incorrect connection such as connecting the side power supply terminal 10H and the low potential side power supply terminal 10L to each other, the polarity of the high potential side power supply terminal 10H and the low potential side power supply terminal 10L is reversed. A detection signal indicating an erroneous connection is output from the connection detection means 3, and the control means 4 that has received the detection signal releases the opening / closing means 20, and each of the high potential side power supply terminal 10H and the low potential side power supply terminal 10L. And the load terminals 11H and 11L are cut off and the power supply to the load is stopped, so that it is possible to prevent the load from being destroyed due to misconnection.

  In addition, since the notifying means 6 for notifying that there is an incorrect connection is provided, it is possible to notify that an incorrect connection has been made, so that it is possible to promptly restart the connection. Further, the misconnection detection means 3 includes a differential amplifier circuit in which the potential VH of the high potential side power supply terminal 10H is input to the minus terminal and the potential VL of the low potential side power supply terminal 10L is input to the plus terminal, and a differential amplifier circuit When the output exceeds the predetermined threshold value Vref, it has a determination means for determining that the polarity is reverse and outputting the detection signal, so that it is possible to detect a misconnection with a simple circuit configuration. .

  Moreover, since the output voltage of the full-wave rectifier circuit 50 is the absolute value of the voltage (input voltage) applied between the input terminals, the polarity of the high potential side power supply terminal 10H and the low potential side power supply terminal 10L is opposite. Even when an AC power supply is connected, the output voltage of the full-wave rectifier circuit 50 takes a positive value. Therefore, even when an incorrect connection is made, the operation of the erroneous connection detection means 3 and the control means 4 is performed. A power supply can be generated, the erroneous connection detection means 3 and the control means 4 can be operated reliably, and a battery for supplying operation power is not required.

  In the present embodiment, the contact portion 2 that is a mechanical contact is employed as the opening / closing means 20. However, as the opening / closing means 20, for example, a semiconductor switch such as a MOSFET can be employed. A hybrid type combined with a switch can also be used. In addition, the notification unit 6 does not necessarily include both the display unit 60 and the ringing unit 61, and may be only one of them, or an erroneous connection may be caused to an external device by a communication unit such as wired or wireless. You may notify what was done.

  By the way, the circuit breaker of this embodiment is used as a later-described DC breaker 114 in a DC power distribution system as shown in FIG. 5, for example.

  Although FIG. 5 is described assuming a detached house as a building where the DC power distribution system is installed, the present invention may be applied to an apartment house.

  The house H shown in FIG. 5 is provided with a DC power supply unit 101 that outputs DC power and a DC device 102 as a load driven by DC power, and is connected to the output end of the DC power supply unit 101. DC power is supplied to the DC device 102 through the DC supply line Wdc. A current flowing through the DC supply line Wdc is monitored between the DC power supply unit 101 and the DC device 102. When an abnormality is detected, power is supplied from the DC power supply unit 101 to the DC device 102 on the DC power supply line Wdc. The above-described DC breaker 114 is provided to limit or block the above.

  The DC supply line Wdc is used as both a DC power supply path and a communication path, and is connected to the DC supply line Wdc by superimposing a communication signal for transmitting data on a DC voltage using a high-frequency carrier wave. Enables communication between devices. This technique is similar to a power line carrier technique in which a communication signal is superimposed on an AC voltage in a power line that supplies AC power.

  The DC supply line Wdc is connected to the home server 116 via the DC power supply unit 101. The in-home server 116 is a main device for constructing a home communication network (hereinafter referred to as “home network”), and communicates with a subsystem constructed by the DC device 102 in the home network.

  In the example shown in the drawing, as an subsystem, an illumination system comprising an information equipment system K101 comprising an information-system DC device 102 such as a personal computer, a wireless access point, a router, and an IP telephone, and an illumination system DC equipment 102 such as a lighting fixture. K102, K105, an intercom system K103 including a DC device 102 for handling visitors and monitoring intruders, a residential alarm system K104 including a DC device 102 for an alarm system such as a fire detector, and the like. Each subsystem constitutes a self-supporting distributed system, and can operate even with the subsystem alone.

  The above-described DC breaker 114 is provided in association with a subsystem. In the illustrated example, four DCs are associated with the information equipment system K101, the lighting system K102 and the intercom system K103, the house alarm system K104, and the lighting system K105. A breaker 114 is provided. When a plurality of subsystems are associated with one DC breaker 114, a connection box 121 for dividing the system of the DC supply line Wdc is provided for each subsystem. In the illustrated example, a connection box 121 is provided between the illumination system K102 and the intercom system K103.

  As the information equipment system K101, there is provided an information equipment system K101 composed of a DC equipment 102 connected to a DC outlet 131 arranged in advance in the house H (constructed when the house H is constructed) in the form of a wall outlet or a floor outlet.

  The lighting systems K102 and K105 include a lighting system K102 composed of a lighting device (DC device 102) arranged in advance in the house H and a lighting device (DC device 102) connected to a hook ceiling 132 arranged in advance on the ceiling. An illumination system K105 is provided. At the time of interior construction of the house H, the contractor attaches the lighting fixture to the hook ceiling 132, or the householder himself attaches the lighting fixture.

  In addition to using an infrared remote control device, a control instruction for the lighting apparatus that is the DC device 102 constituting the lighting system K102 can be given using a communication signal from the switch 141 connected to the DC supply line Wdc. That is, the switch 141 has a communication function together with the DC device 102. In addition, a control instruction may be given by a communication signal from another DC device 102 in the home network or the home server 116 regardless of the operation of the switch 141. The instructions to the lighting fixture include lighting, extinguishing, dimming, and blinking lighting.

  Since any DC device 102 can be connected to the DC outlet 131 and the hooking ceiling 132 described above and DC power is output to the connected DC device 102, the DC outlet 131 and the hooking ceiling 132 are distinguished below. When it is not necessary, it is called “DC outlet”.

  These DC outlets have a plug-in connection port into which a contact (not shown) provided directly on the DC device 102 or a contact (not shown) provided via a connection line is inserted into the body. The contact receiver that directly contacts the contact inserted into the connection port is held by the container. That is, the direct current outlet supplies power in a contact manner. When the DC device 102 connected to the DC outlet has a communication function, a communication signal can be transmitted through the DC supply line Wdc. A communication function is provided not only in the DC device 102 but also in the DC outlet.

  The home server 116 not only is connected to the home network, but also has a connection port connected to the wide area network NT that constructs the Internet. When the in-home server 116 is connected to the wide area network NT, it is possible to receive services from the center server 200 that is a computer server connected to the wide area network NT.

  The service provided by the center server 200 includes a service that enables monitoring and control of equipment (including mainly the DC equipment 102 but also other equipment having a communication function) connected to the home network through the wide area network NT. is there. This service makes it possible to monitor and control devices connected to the home network using a communication terminal (not shown) having a browser function such as a personal computer, Internet TV, or mobile phone.

  The in-home server 116 has both functions of communication with the center server 200 connected to the wide area network NT and communication with equipment connected to the home network, and identification information on equipment in the home network ( Here, it is assumed that an IP address is used).

  The home server 116 enables monitoring and control of home devices through the center server 200 from a communication terminal connected to the wide area network NT by using a communication function with the center server 200. The center server 200 mediates between home devices and communication terminals on the wide area network NT.

  When monitoring and controlling home devices from a communication terminal, monitoring and control requests are stored in the center server 200, and the home device periodically performs one-way polling communication to monitor from the communication terminal. And receive control requests. With this operation, it is possible to monitor and control devices in the house from the communication terminal.

  Further, when an event that should be notified to the communication terminal, such as a fire detection, occurs in the home device, the home device notifies the center server 200, and the center server 200 notifies the communication terminal by e-mail.

  An important function among the communication functions with the home network in the home server 116 is the detection and management of devices constituting the home network. The home server 116 automatically detects devices connected to the home network by applying UPnP (Universal Plug and Play). The home server 116 includes a display device 117 having a browser function, and displays a list of detected devices on the display device 117. The display device 117 has a configuration with a touch panel type or an operation unit, and can perform an operation of selecting desired contents from options displayed on the screen of the display device 117. Therefore, the user (contractor or householder) of the home server 116 can monitor or control the device on the screen of the display device 117. The display device 117 may be provided separately from the home server 116.

  The in-home server 116 manages information related to device connection, and grasps the type, function, and address of the device connected to the home network. Accordingly, the devices in the home network can be operated in conjunction with each other. Information on the connection of the device is automatically detected as described above. In order to operate the device in an interlocking manner, the device itself is automatically associated with the attribute held by the device itself, and the home server 116 is configured as a personal computer. It is also possible to connect various information terminals and use the browser function of the information terminals to associate devices.

  Each device holds the relationship of the interlocking operation of the devices. Therefore, the device can operate in an interlocked manner without passing through the home server 116. By associating the linked operations for each device, for example, by operating a switch that is a device, it is possible to turn on or off the lighting fixture that is the device. In many cases, the association of the interlocking operations is performed within the subsystem, but the association beyond the subsystem is also possible.

  By the way, the DC power supply unit 101 basically generates DC power by power conversion of an AC power supply AC supplied from outside the house like a commercial power supply. In the configuration shown in the figure, the AC power source AC is input to an AC / DC converter 112 including a switching power source through a main circuit breaker 111 attached to the distribution board 110 as an internal unit. The DC power output from the AC / DC converter 112 is connected to each DC breaker 114 through the cooperative control unit 113.

  The DC power supply unit 101 is provided with a secondary battery 162 in preparation for a period in which power is not supplied from the AC power supply AC (for example, a power failure period of the commercial power supply AC). It is also possible to use a solar cell 161 or a fuel cell 163 that generates DC power. The solar battery 161, the secondary battery 162, and the fuel battery 163 are distributed power supplies with respect to the main power supply including the AC / DC converter 112 that generates DC power from the AC power supply AC. In the illustrated example, the solar cell 161, the secondary battery 162, and the fuel cell 163 include a circuit unit that controls the output voltage, and the secondary battery 162 includes a circuit unit that controls charging as well as discharging.

  Of the distributed power sources, the solar cell 161 and the fuel cell 163 are not necessarily provided, but the secondary battery 162 is preferably provided. The secondary battery 162 is charged in a timely manner by a main power source or other distributed power source, and the secondary battery 162 is discharged not only in a period in which power is not supplied from the AC power source AC but also in a timely manner as necessary. The cooperation control unit 113 performs charge / discharge of the secondary battery 162 and cooperation between the main power source and the distributed power source. That is, the cooperative control unit 113 functions as a DC power control unit that controls the distribution of power from the main power supply and the distributed power supply constituting the DC power supply unit 101 to the DC devices 102. Note that a configuration may be adopted in which the outputs of the solar cell 161, the secondary battery 162, and the fuel cell 163 are converted into AC power and used as input power of the AC / DC converter 112.

  Since the driving voltage of the DC device 102 is selected from a plurality of types of voltages depending on the device, the cooperative control unit 113 is provided with a DC / DC converter to convert the DC voltage obtained from the main power source and the distributed power source into the necessary voltage. Is desirable. Normally, one type of voltage is supplied to one subsystem (or DC device 102 connected to one DC breaker 114), but three or more wires are used for one subsystem. A plurality of types of voltages may be supplied. Alternatively, it is possible to adopt a configuration in which the DC supply line Wdc is of a two-wire type and the voltage applied between the lines is changed with time. The DC / DC converter may be provided in a plurality of dispersed manners like the DC breaker.

  In the above configuration example, only one AC / DC converter 112 is illustrated, but a plurality of AC / DC converters 112 can be arranged in parallel, and when a plurality of AC / DC converters 112 are provided. It is desirable to increase or decrease the number of AC / DC converters 112 that are operated according to the magnitude of the load.

  The AC / DC converter 112, the cooperative control unit 113, the DC breaker 114, the solar cell 161, the secondary battery 162, and the fuel cell 163 described above are provided with a communication function, and include a main power source, a distributed power source, and a DC device 102. It is possible to perform cooperative operations that deal with the load status. The communication signal used for this communication is transmitted in the form of being superimposed on the DC voltage in the same manner as the communication signal used for the DC device 102.

  In the above example, the AC / DC converter 112 is arranged in the distribution board 110 in order to convert the AC power output from the main breaker 111 into DC power by the AC / DC converter 112. On the output side, a branch breaker (not shown) provided in the distribution board 110 branches the AC supply line into a plurality of systems, and an AC / DC converter is provided on the AC supply line of each system to convert it into DC power for each system. You may employ | adopt the structure to do.

  In this case, since the DC power supply unit 101 can be provided for each floor or room of the house H, the DC power supply unit 101 can be managed for each system, and the DC device 102 that uses DC power and Since the distance of the DC supply line Wdc between the two is reduced, the power loss due to the voltage drop in the DC supply line Wdc can be reduced. Also, the main breaker 111 and the branch breaker are housed in the distribution board 110, and the AC / DC converter 112, the cooperative control unit 113, the DC breaker 114, and the home server 116 are housed in a separate board from the distribution board 110. Also good.

  Moreover, the circuit breaker of this embodiment is an example to the last, Comprising: It is not the meaning which limits the technical scope of this invention to the structure of this embodiment, You may change in the range which does not deviate from the meaning of this invention. These points are the same in Embodiments 2 to 4 described later.

(Embodiment 2)
The circuit breaker of this embodiment is different from that of the first embodiment in the configuration of the control means 4 and the other configurations are the same as those in the first embodiment. Is omitted.

  Unlike the first embodiment, the control means 4 in this embodiment operates only the notification means 6 and does not operate the tripping device 22 when the detection signal is input. . That is, in this embodiment, only notification is performed when a misconnection is detected. The misconnection detection means 3, the control means 4, and the notification means 6 reduce the high-potential-side power supply terminal 10H. When the polarity of the potential side power supply terminal 10L is opposite, an incorrect connection notification means for notifying that the connection is incorrect is configured.

  According to the circuit breaker of the present embodiment described above, the low potential side power supply terminal 10L is connected to the high potential side of the DC power supply, and the high potential side power supply terminal 10H is connected to the low potential side, or the high potential is connected to the AC power supply. In the case of incorrect connection such as connecting the side power supply terminal 10H and the low potential side power supply terminal 10L to each other, the polarity of the high potential side power supply terminal 10H and the low potential side power supply terminal 10L is reversed. Since the notification is performed by the connection notification means, it is possible to promptly restart the connection, and it is possible to prevent the load from being destroyed by the incorrect connection.

  In the present embodiment, the erroneous connection detection means 3 and the control means 4 constitute an erroneous connection notification means. The power generation means 5 provides the operating power for the erroneous connection notification means. Therefore, here, the power generation means 5 has the full-wave rectifier circuit 50 as described in the first embodiment, and the output voltage of the full-wave rectifier circuit 50 is the voltage (between the input terminals ( The absolute value of the input voltage), the output of the full-wave rectifier circuit 50 even if the polarity of the high-potential power supply terminal 10H and the low-potential power supply terminal 10L is reversed or an AC power supply is connected. Since the voltage takes a positive value, it is possible to generate an operating power supply for the misconnection notification means even when an incorrect connection is made, to reliably operate the misconnection notification, and to supply the operating power Battery is not required.

  Further, when only the notification is performed as in the present embodiment, a bimetal or the like can be employed as the tripping device 22, and in this case, control by the current detection unit 7 and the control unit 4 is not necessary. The circuit configuration can be simplified and the cost can be reduced.

(Embodiment 3)
As shown in FIG. 6, the circuit breaker of the present embodiment is mainly different from the first embodiment in the configuration of the misconnection detection means 3 and the control means 4, and the other configurations are the same as those in the first embodiment. Therefore, the same components are denoted by the same reference numerals and description thereof is omitted. In FIG. 6, the power generation means 5 and the current detection unit 7 are not shown for the sake of simplicity.

  As shown in FIG. 6, the erroneous connection detection means 3 in the present embodiment has a cathode between the high potential side power supply terminal 10H and the load terminal 11H, and an anode between the low potential side power supply terminal 10L and the load terminal 11L. Are connected to each other, a diode D30 connected in antiparallel to the light emitting diode LED30, and a current limiting resistor R35 connected in series to the light emitting diode LED30. The light emitting diode LED30 constitutes a photocoupler PC together with the phototransistor PT connected to the control means 4.

  Therefore, in the erroneous connection detection means 3 in the present embodiment, the potential VL of the low potential side power supply terminal 10L becomes higher than the potential VH of the high potential side power supply terminal 10H (that is, has a reverse polarity), and the low potential side power supply terminal 10L. And the high potential side power supply terminal 10H exceeds the forward voltage drop of the light emitting diode LED30, the light emitting diode LED30 is turned on. That is, the detection signal in the present embodiment is an optical signal composed of light emitted from the light emitting diode LED30.

  The control means 4 in the present embodiment operates the tripping device 22 when the detection signal consisting of the light signal of the light emitting diode LED30 is input to the phototransistor PT, thereby releasing each of the pair of opening / closing means 20, and The display unit 60 of the notification means 6 is turned on and the ringing unit 61 is ringed. Here, once the detection signal is input, the control means 4 continues the notification by the notification means 6 even if the detection signal is not input, and a reset button (not shown) or the like is operated. The notification by the notification means 6 is terminated.

  According to the circuit breaker of the present embodiment described above, the same effects as those of the first embodiment can be obtained, and the configuration of the erroneous connection detection means 3 can be simplified as compared with the first embodiment. Incorrect circuit detection can be performed with a simple circuit configuration, and the cost can be reduced.

  In the misconnection detection means 3 in the present embodiment, the operational amplifier 30 is not used, and it is not necessary to apply the potential −Vcc to the negative terminal of the operational amplifier 30. Therefore, as in the first embodiment, the potential Vcc and the potential − Since the power generation means 5 for generating Vcc and the ground potential is not necessary and only the potential Vcc and the ground potential are sufficient, the circuit configuration can be simplified.

(Embodiment 4)
As shown in FIG. 7A, the circuit breaker of the present embodiment is different from that of the first embodiment in that it does not include the erroneous connection detection means 3, and the configuration of the control means 4 and the notification means 6 is implemented. Different from Form 1. 7A and 7B, illustration of the control means 4, the power supply generation means 5, and the current detection means 7 is omitted for simplification of illustration.

  As shown in FIG. 7A, the notification means 6 in the present embodiment comprises only the display unit 60. The display unit 60 has a low cathode between the high-potential side power supply terminal 10H and the load terminal 11H. A light emitting diode LED60 whose anode is connected between the potential side power supply terminal 10L and the load terminal 11L, a diode D60 connected in antiparallel to the light emitting diode LED60, and a current limiting diode connected in series to the light emitting diode LED60. And a resistor R60.

  Therefore, the potential VL of the low potential side power supply terminal 10L becomes higher than the potential VH of the high potential side power supply terminal 10H (that is, reverse polarity), and the potential difference between the low potential side power supply terminal 10L and the high potential side power supply terminal 10H is When the forward voltage drop of the light emitting diode LED60 is exceeded, the light emitting diode LED60 is turned on. That is, in the present embodiment, the display unit 60 constitutes an erroneous connection notification unit that notifies that an incorrect connection has occurred when the polarity of the high potential side power supply terminal 10H and the low potential side power supply terminal 10L is opposite. ing.

  In the present embodiment, the control unit 4 operates the tripping device 22 only when an overcurrent is detected by the current detection means 7 to release the opening / closing means 20.

  Below, the operation | movement at the time of the connection in the circuit breaker of this embodiment is demonstrated. First, when the high potential side power supply terminal 10H is connected to the high potential side of the DC power supply and the low potential side power supply terminal 10L is connected to the low potential side (that is, the wiring is correctly performed), the potential of the low potential side power supply terminal 10L Since VL becomes lower than the potential VH of the high potential side power supply terminal 10H, a current flows through the display unit 60 via the diode D60, and the light emitting diode LED60 is not lit.

  Next, when the high potential side power supply terminal 10H is connected to the low potential side of the DC power supply and the low potential side power supply terminal 10L is connected to the high potential side (that is, when the wrong connection is made such that the wires are connected in reverse), The potential VL of the potential-side power supply terminal 10L becomes higher than the potential VH of the high-potential-side power supply terminal 10H. As a result, a current flows through the display unit 60 via the light emitting diode LED60, and the light emitting diode LED60 is turned on.

  Finally, when a circuit breaker is connected to the AC power supply (that is, when the wrong type of power supply is connected), an AC voltage is applied between the low potential power supply terminal 10L and the high potential power supply terminal 10H. Therefore, since the potential VL of the low potential side power supply terminal 10L periodically becomes higher than the potential VH of the high potential side power supply terminal 10H, current flows alternately between the light emitting diode LED60 and the diode D60 in the display unit 60. The light emitting diode LED60 is repeatedly turned on and off (flashes).

  That is, when the connection is correctly performed, the light emitting diode LED 60 of the display unit 60 is not lit at all. When the connection is erroneously performed, the light emitting diode LED 60 is lit or blinks.

  According to the circuit breaker of the present embodiment described above, the low potential side power supply terminal 10L is connected to the high potential side of the DC power supply, and the high potential side power supply terminal 10H is connected to the low potential side, or the high potential is connected to the AC power supply. In the case of incorrect connection such as connecting the side power supply terminal 10H and the low potential side power supply terminal 10L to each other, the polarity of the high potential side power supply terminal 10H and the low potential side power supply terminal 10L is reversed. Since the notification is performed by the display unit 60 serving as a connection notification means, it is possible to promptly restart the connection, and it is possible to prevent the load from being destroyed due to an incorrect connection.

  By the way, in the display part 60 in this embodiment, as shown in FIG.7 (b), light emitting diode LED61 can be employ | adopted instead of the diode D60. In this case, it is preferable that the light emitting diode LED60 and the light emitting diode LED61 have different emission colors (for example, the emission color of the light emitting diode LED61 is red and the emission color of the light emitting diode LED61 is green).

  In the circuit breaker shown in FIG. 7B, when the high potential side power supply terminal 10H is connected to the high potential side of the DC power supply and the low potential side power supply terminal 10L is connected to the low potential side, the low potential side power supply terminal 10L Since the potential VL is lower than the potential VH of the high potential side power supply terminal 10H, a current flows through the display section 60 via the light emitting diode LED61, so that the light emitting diode LED61 is lit but the light emitting diode LED60 is not lit.

  Next, when the high potential side power supply terminal 10H is connected to the low potential side of the DC power supply and the low potential side power supply terminal 10L is connected to the high potential side, the potential VL of the low potential side power supply terminal 10L is the high potential side power supply terminal. As a result, the current flows through the display unit 60 via the light emitting diode LED60, so that the light emitting diode LED60 is lit but the light emitting diode LED61 is not lit.

  Finally, when a circuit breaker is connected to the AC power supply (that is, when the wrong type of power supply is connected), an AC voltage is applied between the low potential power supply terminal 10L and the high potential power supply terminal 10H. Therefore, periodically, the potential VL of the low potential side power supply terminal 10L becomes higher than the potential VH of the high potential side power supply terminal 10H, and therefore, in the display unit 60, current is alternately supplied to the light emitting diode LED60 and the light emitting diode LED61. As a result, the light emitting diode LED60 and the light emitting diode LED61 are alternately lit.

  That is, when the connection is correctly performed (DC power supply is correctly connected), only the light emitting diode LED61 is lit (only green light is emitted), and when the DC power supply is connected reversely, only the light emitting diode LED60 is lit (red) When only an AC power source is connected, the light emitting diode LED 60 and the light emitting diode LED 61 are alternately lit (red light and green light are alternately emitted).

  Therefore, even with the circuit breaker shown in FIG. 7B, the same effect as that shown in FIG. 7A can be obtained, and in addition, the circuit breaker shown in FIG. Since the light-emitting diodes LED60 and LED61 are used to notify whether or not the connection is correct, the connection state (whether or not the connection is incorrect) can be reported more easily than that shown in FIG. it can.

  Further, when only the notification is performed as in the present embodiment, a bimetal or the like can be employed as the tripping device 22, and in this case, control by the current detection unit 7 and the control unit 4 is not necessary. The circuit configuration can be simplified and the cost can be reduced.

It is a schematic explanatory drawing of the circuit breaker of Embodiment 1. It is operation | movement explanatory drawing of a circuit breaker same as the above. It is operation | movement explanatory drawing of a circuit breaker same as the above. It is operation | movement explanatory drawing of a circuit breaker same as the above. It is explanatory drawing of the DC power distribution system which uses a circuit breaker same as the above. It is a schematic explanatory drawing of the circuit breaker of Embodiment 3. It is a schematic explanatory drawing of the circuit breaker of Embodiment 4.

Explanation of symbols

3 Misconnection detection means 4 Control means 6 Notification means 10H High potential side power supply terminal 10L Low potential side power supply terminal 11H, 11L Load terminal 20 Opening / closing means

Claims (5)

Between the high potential side power supply terminal and the low potential side power supply terminal connected to the high potential side and the low potential side of the DC power supply, respectively, and between the high potential side power supply terminal and the load terminal corresponding to the high potential side power supply terminal A circuit breaker comprising a pair of switching means inserted between a potential-side power supply terminal and a load terminal corresponding to the low-potential-side power supply terminal,
An erroneous connection detection means for outputting a detection signal indicating an erroneous connection when the polarity of the high potential side power supply terminal and the low potential side power supply terminal is opposite;
A circuit breaker comprising: control means for releasing each of the pair of opening / closing means when the detection signal is inputted.   2. The circuit breaker according to claim 1, further comprising notification means for notifying that an erroneous connection has occurred. Between the high potential side power supply terminal and the low potential side power supply terminal connected to the high potential side and the low potential side of the DC power supply, respectively, and between the high potential side power supply terminal and the load terminal corresponding to the high potential side power supply terminal A circuit breaker comprising a pair of switching means inserted between a potential-side power supply terminal and a load terminal corresponding to the low-potential-side power supply terminal,
A circuit breaker comprising an erroneous connection notification means for notifying that an erroneous connection has occurred when the polarities of the high potential side power supply terminal and the low potential side power supply terminal are reversed. A power generation means for generating an operating power supply for the erroneous connection detection means and the control means;
The power generation means has a full-wave rectifier circuit in which a voltage applied between the high-potential-side power supply terminal and the low-potential-side power supply terminal is applied between the input terminals, and the output voltage of the full-wave rectifier circuit The circuit breaker according to claim 1, wherein the operating power supply is generated based on the circuit breaker. Power supply generating means for generating an operating power supply for the erroneous connection notification means,
The power generation means has a full-wave rectifier circuit in which a voltage applied between the high-potential-side power supply terminal and the low-potential-side power supply terminal is applied between the input terminals, and based on the output voltage of the full-wave rectifier circuit 4. The circuit breaker according to claim 3, wherein the operation power supply is generated.

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