JP5857268B2 - Circuit breaker - Google Patents

Description

  The present invention relates to a circuit breaker that cuts off the electric circuit when an abnormality occurs in the electric circuit.

  Patent Document 1 discloses a conventional circuit breaker that shuts off the electric circuit when an abnormality occurs in the electric circuit. The circuit breaker described in Patent Document 1 uses a coil to cut off the electric circuit when an abnormality such as leakage or phase failure occurs in the electric circuit between the AC power supply and the load. indicate.

Japanese Patent No. 3687543

  However, the conventional circuit breaker described in Patent Document 1 uses a different coil for each cause of abnormality to interrupt the electric circuit (contact removal) and display the cause of the abnormality. That is, the circuit breaker employs a mechanical display method. For this reason, when many abnormal causes are displayed individually and an attempt is made to cut off the electric circuit, there is a problem that the number of coils required for the number of abnormal causes is required and the circuit breaker becomes large.

  In addition, the conventional circuit breaker that employs an electronic display method shuts off the electrical circuit and then shuts off the power necessary to keep the switch on to display the cause of the abnormality. Could not be displayed continuously.

  The present invention has been made in view of the above points, and an object of the present invention is to display the cause of an abnormality in an electric circuit individually and clearly when the abnormality occurs in the electric circuit while being small in size. The object is to provide a circuit breaker.

The circuit breaker according to the present invention is a circuit breaker that shuts off the electric circuit when an abnormality occurs in the electric circuit, and includes a circuit breaker inserted in the electric circuit and a plurality of causes of the electric circuit individually. An abnormality determination unit for determining, a tripping coil for pulling off a contact of the circuit breaker when at least one of the plurality of abnormality causes is determined by the abnormality determination unit, and the abnormality when power is supplied Display means for displaying the cause of abnormality determined by the determination section, and is turned on when the display means displays the cause of abnormality determined by the abnormality determination section inserted in the power supply path to the display means and a switch, the abnormality determination section, the abnormality determination unit and the abnormality cause-specific which is determined, a display signal for displaying the abnormality cause in said display unit by turning on the switch, the Outputting a trip signal for tripping the contacts of the circuit breaker when it is determined at least one of the abnormality cause number as the same signal, the switch, the on-state self-holding function of the self-holding Yes, and turned on when receiving the display signal, the trip coil is characterized by tripping the contacts of the circuit breaker in accordance with the signal for removing the pull.
The circuit breaker according to the present invention is a circuit breaker that shuts off the electric circuit when an abnormality occurs in the electric circuit, and includes a circuit breaker inserted in the electric circuit and a plurality of causes of the electric circuit individually. An abnormality determination unit for determining, a tripping coil for pulling off a contact of the circuit breaker when at least one of the plurality of abnormality causes is determined by the abnormality determination unit, and the abnormality when power is supplied Display means for displaying the cause of abnormality determined by the determination section, and is turned on when the display means displays the cause of abnormality determined by the abnormality determination section inserted in the power supply path to the display means A detection unit including a switch, the abnormality determination unit, the tripping coil, the abnormality determination unit, and a first housing in which the tripping coil is housed, the display means, and the switch And a display unit including the display means and a second housing in which the switch is housed, and the switch has a self-holding function for self-holding the ON state, the detection unit and the display unit Are provided separately, and the detection unit and the display unit further include an inter-unit connection section for connecting to another unit, and the display unit includes a single display section as the display means. And a plurality of abnormal causes are provided in one-to-one correspondence with the plurality of causes of abnormality, and the detection unit is electrically connected to the plurality of display units.

  In this circuit breaker, the abnormality determination unit is configured to turn on the switch and display the abnormality cause on the display unit for each abnormality cause determined by the abnormality determination unit, and the plurality of display signals. When at least one of the causes of abnormality is determined, a trip signal for tripping the contact of the circuit breaker is output as the same signal, and the switch is turned on when receiving the display signal, The tripping coil preferably trips the circuit breaker contact according to the tripping signal.

  In the circuit breaker, the abnormality determination unit outputs a display signal for turning on the switch and displaying the abnormality cause on the display unit for each abnormality cause determined by the abnormality determination unit. In addition, when determining at least one of the plurality of abnormal causes, a trip signal for tripping the contact of the circuit breaker is output separately from the display signal, and the switch includes the display signal. Preferably, the tripping coil is turned on and the tripping coil trips the circuit breaker contact according to the tripping signal.

  In this circuit breaker, it is preferable that the abnormality determination unit outputs the trip signal after outputting the display signal.

  In this circuit breaker, the switch is preferably selected from a thyristor, a triac, and a latching relay.

  In this circuit breaker, the display signal is preferably a current output signal.

  The circuit breaker includes a detection unit including the abnormality determination unit, the tripping coil, the abnormality determination unit, and a first housing in which the tripping coil is housed, and the display unit. A display unit including the switch, the display unit, and a second housing in which the switch is housed, wherein the detection unit and the display unit are provided separately, and the detection unit and the display It is preferable that the unit further includes an inter-unit connection unit for connecting to another unit.

  In this circuit breaker, the display unit includes, as the display unit, a plurality of display units provided in a one-to-one correspondence with the plurality of abnormal causes, and the switch includes the plurality of display units and 1 It is preferable that a plurality of display units are provided corresponding to the pair 1, and each of the plurality of display units displays the corresponding cause of the abnormality when the corresponding switch is turned on.

  In this circuit breaker, it is preferable that the display unit includes a single display unit as the display unit and a changeover switch for switching the cause of the abnormality to be displayed on the display unit.

  In this circuit breaker, the inter-unit connection portion is preferably a connector.

  In this circuit breaker, it is preferable that the abnormality discriminating unit is composed of a single integrated circuit.

  According to the present invention, although the size is small, when an abnormality occurs in the electric circuit, the cause of the abnormality in the electric circuit can be displayed individually and clearly.

1 is a schematic diagram illustrating a configuration of a circuit breaker according to Embodiment 1. FIG. It is the schematic which shows the structure of the circuit breaker which concerns on Embodiment 2. FIG. It is operation | movement explanatory drawing of the circuit breaker concerning the same as the above. It is the schematic which shows the structure of the circuit breaker concerning Embodiment 3. It is the schematic which shows the structure of the circuit breaker which concerns on Embodiment 4. It is the schematic which shows the structure of the circuit breaker which concerns on Embodiment 5. FIG.

(Embodiment 1)
As shown in FIG. 1, the circuit breaker 1 according to the first embodiment is a device that breaks the electric circuit 91 when an abnormality occurs in the electric circuit 91 between the AC power supply 9 and a load (not shown). The electric path 91 is a three-phase power supply path for supplying electric power from the AC power supply 9 to a load (not shown). The circuit breaker 1 includes a circuit breaker 2 inserted in the electric circuit 91, an abnormality determination unit 3 that individually determines a plurality of causes of abnormality in the electric circuit 91, and a tripping device that trips the contact of the circuit breaker 2. The coil 4 is provided. The circuit breaker 1 includes a display means 5 for displaying the cause of the abnormality and a plurality (three in the illustrated example) of switches 6, 6, and 6 that are turned on when the display means 5 displays the cause of the abnormality. ing. The circuit breaker 1 further includes a determination power source 71 that is a power source for the abnormality determination unit 3 and a display power source 72 that is a power source for the display unit 5.

  The circuit breaker 2 is provided by being inserted in an electric circuit 91 between an AC power source 9 and a load (not shown), and normally has a contact closed. However, when an abnormality occurs in the electric circuit 91, the circuit breaker 2 is for tripping. The contacts are separated by the coil 4.

  The abnormality determination unit 3 is configured by a circuit composed of a plurality of circuit elements or a single integrated circuit, and individually determines a plurality of causes of the abnormality in the electric circuit 91 when an abnormality occurs in the electric circuit 91. The abnormality determination unit 3 that has determined the cause of abnormality outputs the display signal S1 and the tripping signal S2 as the same signal for each determined cause of abnormality. The display signal S1 is a signal for turning on the switch 6 and causing the display means 5 to display the cause of the abnormality. The trip signal S2 is a signal for tripping the contact of the circuit breaker 2 when at least one of a plurality of abnormal causes occurs. The display signal S1 (trip signal S2) of the present embodiment is a current output signal.

  For example, the abnormality determination unit 3 includes a leakage detection circuit (not shown), and when a detection result is acquired from a current transformer (not shown) that detects a current flowing through the electric circuit 91, the detection result is used. Determine whether a leak has occurred. When it is determined that a leakage has occurred, the abnormality determination unit 3 outputs a leakage display signal S11 for causing the leakage display unit 511 to display the occurrence of the leakage to the leakage switch 61.

  In addition, the abnormality determination unit 3 includes a phase loss determination circuit (not shown), and determines whether or not a phase loss of the electric circuit 91 has occurred by detecting an overvoltage. When it is determined that a phase loss has occurred, the abnormality determination unit 3 outputs a phase loss display signal S12 for displaying the phase loss occurrence on the phase loss display unit 512 to the phase loss switch 62.

  In addition, when other abnormality causes other than leakage and phase failure are determined, the abnormality determination unit 3 provides other abnormality display signals S13 for displaying other abnormality occurrences on the other abnormality display units 513. Is output to the abnormality switch 63.

  The tripping coil 4 trips the contact of the circuit breaker 2 according to the tripping signal S2 output from the abnormality discriminating unit 3 when at least one of a plurality of abnormal causes is judged by the abnormality discriminating unit 3. The circuit breaker 2 is activated. In the present embodiment, an excitation current flows through the tripping coil 4 by causing a current to flow through one of the display sections 51 of the display means 5 in accordance with the display signal S1 that also serves as the tripping signal S2. As a result, the tripping coil 4 trips the contact of the circuit breaker 2.

  In addition, the tripping coil 4 is configured such that when an abnormal current (overcurrent) such as a short-circuit current or an overload current flows through the electric circuit 91, the circuit breaker 2 is output regardless of whether or not the tripping signal S2 is output. The circuit breaker 2 is actuated so as to pull off the contact.

  On the other hand, in the normal state where no abnormality has occurred in the electric circuit 91, the trip signal S2 is not output from the abnormality determination unit 3, and the trip coil 4 is not excited, so the contact of the circuit breaker 2 is closed. .

  The display means 5 displays the cause of the abnormality determined by the abnormality determination unit 3 when power is supplied. The display means 5 of the present embodiment includes a plurality (three in the illustrated example) of display units 51, 51, 51 connected in parallel to the display power source 72. Each display unit 51 is, for example, an indicator lamp, and lights up or blinks when power is supplied from the display power source 72.

  The plurality of display units 51, 51, 51 of the present embodiment are provided in a one-to-one correspondence with a plurality of abnormal causes. In the present embodiment, the display means 5 includes a leakage current display unit 511 corresponding to a leakage, and includes a failure phase display unit 512 corresponding to a phase failure, and copes with other causes of abnormality other than a leakage and a phase failure. In addition, another abnormality display unit 513 is provided. That is, each display unit 51 displays a corresponding abnormality cause when the corresponding switch 6 is turned on. For example, when a leakage occurs in the electrical path 91, the leakage display unit 511 displays that the leakage has occurred. When a phase loss occurs in the electric circuit 91, the phase loss display unit 512 displays that a phase loss has occurred.

  The plurality of switches 6, 6, 6 are provided in a one-to-one correspondence with the plurality of display units 51, 51, 51. Each switch 6 is connected in series to the corresponding display unit 51, and is switched from off to on when receiving the display signal S1 from the abnormality determination unit 3. That is, the switch 6 is inserted into the power supply path of the corresponding display unit 51 and is turned on so that the corresponding display unit 51 displays the cause of the abnormality determined by the abnormality determination unit 3.

  Each switch 6 has a self-holding function that self-holds the ON state at the time of stopping when the instruction to turn on (output of the display signal S1) stops. That is, even when the output of the display signal S1 from the abnormality determination unit 3 is stopped, the switch 6 self-holds the on state. Such a switch 6 is selected from thyristors, triacs and latching relays. As a result, the switch 6 can maintain the ON state even if the display signal S1 is instantaneously received and switched from OFF to ON and the display signal S1 is not continuously received.

  The determination power supply 71 is provided between the AC power supply 9 and the abnormality determination unit 3. The determination power source 71 includes, for example, a power conversion unit (not shown), converts power from the AC power source 9, and supplies power for operating the abnormality determination unit 3 to the abnormality determination unit 3. The display power supply 72 supplies power for displaying the cause of the abnormality on each display unit 51. The display power supply 72 includes a storage battery (not shown), and charges the storage battery with power from the AC power supply 9 when the electric circuit 91 is normal, for example.

  Next, the operation of the circuit breaker 1 according to the present embodiment will be described with reference to FIG. First, the abnormality determination unit 3 detects an abnormality in the electric circuit 91 and determines the cause of the abnormality. Thereafter, the abnormality determination unit 3 outputs a display signal S1 (tripping signal S2) corresponding to the determined cause of abnormality to the corresponding switch 6. When the switch 6 corresponding to the cause of the abnormality receives the display signal S1 from the abnormality determining unit 3, the switch 6 is switched from OFF to ON. Thereafter, the display unit 51 connected in series to the switch 6 is turned on to display the cause of the abnormality. Further, when a current flows through the display unit 51, an exciting current flows through the tripping coil 4, and the tripping coil 4 trips the contact of the circuit breaker 2 to block the electric circuit 91.

  In the circuit breaker 1 of the present embodiment described above, the switch 6 for displaying the cause of the abnormality in the electric circuit 91 on the display means 5 has a self-holding function. As a result, when an abnormality occurs in the electric circuit 91, the switch 6 remains in the ON state even if the instruction to turn on the switch 6 (output of the display signal S1) stops after the electric circuit 91 is interrupted. Can be held. As a result, the cause of the abnormality in the electric circuit 91 can be displayed individually and clearly.

  At this time, since the circuit breaker 1 of the present embodiment also serves as the tripping coil 4 for a plurality of abnormal causes, the circuit breaking device 1 can be made smaller than the case where a different tripping coil is provided for each abnormal cause. can do.

  In the circuit breaker 1 of the present embodiment, the display signal S1 and the tripping signal S2 are the same. Thereby, it is possible to suppress the current consumption when outputting these signals and to reduce the maximum power consumption, compared to the case where the display signal S1 and the tripping signal S2 are separate.

  Furthermore, in the circuit breaker 1 of the present embodiment, the display signal S1 is a current output signal, so that the noise resistance with respect to the voltage is improved as compared with the case where the display signal S1 is a voltage output signal. And the switch 6 can be driven directly. Thereby, the number of parts can be reduced.

  Further, in the circuit breaker 1 of the present embodiment, the abnormality determination unit 3 can be integrated to reduce the consumption, size, and cost.

(Embodiment 2)
As shown in FIG. 2, the circuit breaker 1 according to the second embodiment outputs the display signal S <b> 1 and the tripping signal S <b> 2 from the abnormality determination unit 3 individually, as shown in FIG. 2. 1 (see FIG. 1). In addition, about the component similar to the circuit interruption apparatus 1 of Embodiment 1, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  As shown in FIG. 2, the circuit breaker 1 of this embodiment further includes a trip switch 41.

  The trip switch 41 is connected in series to the trip coil 4 with respect to the AC power source 9. The trip switch 41 is operated by the trip signal S2 output from the abnormality determination unit 3.

  The trip switch 41 has a self-holding function that self-holds the ON state at the time of stop when the instruction to turn on (output of the trip signal S2) stops. That is, even when the output of the tripping signal S2 from the abnormality determination unit 3 is stopped, the tripping switch 41 self-holds the on state. Such a trip switch 41 is selected from a thyristor, a triac, and a latching relay. Thereby, the trip switch 41 can maintain the on state even if the trip signal 41 is not continuously received after the trip signal S2 is received and switched from off to on.

  When the abnormality determination unit 3 of the present embodiment determines the cause of the abnormality in the electric circuit 91, the abnormality determination unit 3 outputs the display signal S1 corresponding to the determined cause of abnormality to the switch 6 and the trip signal S2 as the display signal. Output to the trip switch 41 separately from S1. The abnormality determination unit 3 outputs the tripping signal S2 to the tripping switch 41 regardless of the cause of any abnormality. Note that description of functions similar to those of the abnormality determination unit 3 (see FIG. 1) of the first embodiment is omitted.

In the tripping coil 4 of the present embodiment, when the tripping switch 41 receives the tripping signal S2 and switches from off to on, an excitation current flows and trips the contact of the circuit breaker 2. In addition, description is abbreviate | omitted about the function similar to the trip coil 4 (refer FIG. 1) of Embodiment 1. FIG.

  By the way, as shown in FIG. 3, the abnormality determination unit 3 of the present embodiment detects an abnormality in the electric circuit 91 and determines the cause of the abnormality when an abnormality occurs in the electric circuit 91 at time t1. The display signal S1 corresponding to the cause of the abnormality is instantaneously output to the switch 6. After outputting the display signal (time t2), the abnormality determination unit 3 stops outputting the display signal S1 and outputs the trip signal S2 to the trip switch 41 to the trip switch 41. .

  Next, the operation of the circuit breaker 1 according to the present embodiment will be described with reference to FIGS. When an abnormality occurs in the electric circuit 91 at time t1, first, the abnormality determination unit 3 detects the abnormality of the electric circuit 91, determines the cause of the abnormality, and responds the display signal S1 corresponding to the abnormality cause to the abnormality cause. Output to the switch 6. When the switch 6 corresponding to the cause of the abnormality receives the display signal S1 from the abnormality determining unit 3, the switch 6 is switched from OFF to ON. As a result, the display unit 51 connected in series to the switch 6 is turned on to display the cause of the abnormality. After that, at time t2, the abnormality determination unit 3 outputs a trip signal S2 to the trip switch 41. When the trip switch 41 receives the trip signal S2, the trip switch 41 switches from off to on. As a result, the tripping coil 4 is excited and trips the contact of the circuit breaker 2 to block the electric circuit 91.

  In the circuit breaker 1 of the present embodiment described above, the abnormality determination unit 3 individually outputs the display signal S1 and the tripping signal S2, thereby reducing the capacity of the switch 6.

  Further, in the circuit breaker 1 of the present embodiment, the abnormality determination unit 3 does not output the display signal S1 and the tripping signal S2 at the same time, and therefore outputs the display signal S1 and the tripping signal S2 at the same time. As a result, the maximum power consumption can be reduced.

(Embodiment 3)
As shown in FIG. 4, the circuit breaker 1 according to the third embodiment is different from the circuit breaker 1 according to the first embodiment (see FIG. 1) in that the circuit breaker 1 includes a plurality of units 81 and 82. In addition, about the component similar to the circuit interruption apparatus 1 of Embodiment 1, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  As shown in FIG. 4, the circuit breaker 1 according to the present embodiment includes a detection unit 81 and a display unit 82 separately.

  The detection unit 81 is connected to the abnormality determination unit 3, the tripping coil 4, the first casing (not shown) in which the abnormality determination unit 3 and the tripping coil 4 are housed, and other units. And an inter-unit connection part (detection unit side connection part) 83 for performing the above operation. That is, the detection unit 81 includes an inter-unit connection portion 83 in order to connect to the display unit 82. The abnormality determination unit 3 of the present embodiment has the same function as the abnormality determination unit 3 (see FIG. 1) of the first embodiment, and the tripping coil 4 of the present embodiment is the tripping of the first embodiment. It has the same function as the coil 4 (see FIG. 1).

  The inter-unit connection portion 83 is a connector having a plurality (three in the illustrated example) of terminals 831 to 833. The inter-unit connection portion 83 is connected to an inter-unit connection portion 84, which will be described later, with a cable 85. The terminal 831 is a terminal used to output the leakage display signal S11 from the detection unit 81 to the display unit 82. The terminal 832 is a terminal used for outputting the phase loss display signal S12 from the detection unit 81 to the display unit 82. The terminal 833 is a terminal used to output another abnormality display signal S13 from the detection unit 81 to the display unit 82.

  The display unit 82 includes a display unit 5, a plurality (three in the illustrated example) of switches 6, 6, and 6, and a second housing (not shown) in which the display unit 5 and each switch 6 are housed. It has. Also in the present embodiment, as in the first embodiment, the display unit 5 includes a plurality (three in the illustrated example) of display units 51, 51, 51 provided in a one-to-one correspondence with a plurality of causes of abnormality. A plurality of (three in the illustrated example) switches 6, 6 and 6 are provided in a one-to-one correspondence with the plurality of display units 51, 51 and 51. Further, the display unit 82 includes an inter-unit connection portion (display unit side connection portion) 84 for connecting to other units. That is, the display unit 82 includes an inter-unit connection portion 84 for connecting to the detection unit 81. The display means 5 of the present embodiment has the same function as the display means 5 (see FIG. 1) of the first embodiment, and each switch 6 of the present embodiment is equivalent to each switch 6 (FIG. 1) of the first embodiment. Function).

  The inter-unit connection portion 84 is a connector having a plurality (three in the illustrated example) of terminals 841 to 843. The terminal 841 is a terminal used to receive the leakage display signal S11 from the detection unit 81. The terminal 842 is a terminal used to receive the phase loss display signal S12 from the detection unit 81. The terminal 843 is a terminal used to receive another abnormality display signal S13 from the detection unit 81.

  In the circuit breaker 1 of the present embodiment described above, the detection unit 81 and the display unit 82 are provided separately, and the degree of freedom of the overall configuration is increased by unitizing the tripping function and the display function individually. Further, for example, downsizing can be achieved.

  Moreover, in the circuit interruption device 1 of the present embodiment, the units can be easily attached and detached by electrically connecting the units with a connector.

(Embodiment 4)
As shown in FIG. 5, the circuit breaker 1 according to the fourth embodiment is different from the circuit breaker 1 according to the third embodiment (see FIG. 4) in that the display unit 82 includes a changeover switch 86. In addition, about the component similar to the circuit breaker 1 of Embodiment 3, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  The display unit 82 of the present embodiment includes a single display unit 51 as the display unit 5. The display unit 82 includes a single switch 6 and a changeover switch 86 that switches the cause of the abnormality to be displayed on the display unit 51. Note that a description of the same functions as those of the display unit 82 (see FIG. 4) of the third embodiment will be omitted. Further, the inter-unit connection portions 83 and 84 are connectors as in the third embodiment.

  The change-over switch 86 is provided between the inter-unit connection portion 84 and the switch 6 and can be switched so that any one of the contacts of the inter-unit connection portion 84 and the switch 6 are electrically connected. That is, the user uses the changeover switch 86 to select which of the abnormal causes causes the abnormal cause to be displayed on the single display unit 51 or to block the electric circuit 91 (see FIG. 1). be able to.

  In the circuit breaker 1 of the present embodiment described above, the cause of the abnormality to be displayed can be switched by the changeover switch 86, so that the function can be easily switched to the function according to the user's request while being the single display unit 51. be able to.

  Moreover, also in the circuit interruption device 1 of the present embodiment, the units can be easily attached and detached by electrically connecting the units with a connector as in the third embodiment.

(Embodiment 5)
As shown in FIG. 6, the circuit breaker 1 according to the fifth embodiment is different from the third embodiment in that a plurality of (three in the illustrated example) display units 82, 82, and 82 are connected to the detection unit 81. This is different from the circuit breaker 1 (see FIG. 4). In addition, about the component similar to the circuit breaker 1 of Embodiment 3, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  The detection unit 81 of this embodiment is electrically connected to a plurality of display units 82, 82, 82. In addition, description is abbreviate | omitted about the function similar to the detection unit 81 (refer FIG. 4) of Embodiment 3. FIG.

  The plurality of display units 82, 82, 82 of the present embodiment are provided in one-to-one correspondence with a plurality of abnormal causes. Each display unit 82 includes a single display unit 51 as the display unit 5, and includes a single switch 6 and an inter-unit connection unit 84. Each display unit 82 further includes an inter-unit connection portion 87 for connecting to another display unit 82. Note that a description of the same functions as those of the display unit 82 (see FIG. 4) of the third embodiment will be omitted.

  The inter-unit connection portion 83 of the present embodiment is a connector having a plurality of (three in the illustrated example) terminals 831 to 833, similarly to the inter-unit connection portion 83 (see FIG. 4) of the third embodiment. The terminal 831 is a terminal used to output the leakage display signal S11 from the detection unit 81 to the display unit 82. The terminal 832 is a terminal used for outputting the phase loss display signal S12 from the detection unit 81 to the display unit 82. The terminal 833 is a terminal used to output another abnormality display signal S13 from the detection unit 81 to the display unit 82.

  The inter-unit connection portion 84 of the present embodiment is a connector having a plurality of (three in the illustrated example) terminals 841 to 843, similarly to the inter-unit connection portion 84 (see FIG. 4) of the third embodiment. However, the terminal 841 of this embodiment is a terminal used to receive the display signal S1 for its own switch 6, and the terminals 842 and 843 of this embodiment are the terminals of the switch 6 of the other display unit 82. This is a terminal used for receiving the display signal S1.

  The inter-unit connection portion 87 is a connector having a plurality (two in the illustrated example) of terminals 871 and 872. The inter-unit connection portion 87 is connected to the inter-unit connection portion 84 of the other display unit 82 by a cable 85. Terminals 871 and 872 are terminals used to output the display signal S1 to another display unit 82. That is, the terminals 871 and 872 of the inter-unit connection portion 87 are used to output the display signal S1 received at the terminals 842 and 843 of the inter-unit connection portion 84 to the other display units 82.

  In the circuit breaker 1 of the present embodiment described above, the number of display units 82 can be freely changed, so that the cause of the abnormality can be displayed as much as necessary according to the user's request.

  Further, since the plurality of display units 82, 82, 82 of the present embodiment have the same configuration, they can be replaced with each other, and can be easily replaced when, for example, a failure occurs.

  Furthermore, also in the circuit interruption device 1 of the present embodiment, the units can be easily attached and detached by electrically connecting the units with each other as in the third embodiment.

DESCRIPTION OF SYMBOLS 1 Circuit breaker 2 Circuit breaker 3 Abnormality determination part 4 Trip coil 5 Display means 51 Display part 6 Switch 81 Detection unit 82 Display unit 83 Inter-unit connection part 84 Inter-unit connection part 86 Changeover switch 87 Inter-unit connection part 91 Electric circuit

Claims (12)

A circuit breaker that shuts off the circuit when an abnormality occurs in the circuit,
A circuit breaker provided inserted in the electric circuit;
An abnormality determination unit for individually determining a plurality of abnormal causes for the electric circuit;
A tripping coil that trips the contact of the circuit breaker when at least one of the plurality of abnormality causes is determined by the abnormality determination unit;
Display means for displaying the cause of the abnormality determined by the abnormality determination unit when power is supplied;
A switch that is turned on when the display means displays the cause of the abnormality that is inserted into the power supply path to the display means and determined by the abnormality determination unit;
For each of the abnormality causes determined by the abnormality determination unit, the abnormality determination unit turns on the switch to display the abnormality cause on the display means, and at least one of the plurality of abnormality causes Output the trip signal for pulling off the contact of the circuit breaker as the same signal,
The switch is in the on state have a self-holding function of the self-hold, turn on when receiving the display signal,
The circuit breaker , wherein the tripping coil trips a contact of the circuit breaker according to the tripping signal . A circuit breaker that shuts off the circuit when an abnormality occurs in the circuit,
A circuit breaker provided inserted in the electric circuit;
An abnormality determination unit for individually determining a plurality of abnormal causes for the electric circuit;
A tripping coil that trips the contact of the circuit breaker when at least one of the plurality of abnormality causes is determined by the abnormality determination unit;
Display means for displaying the cause of the abnormality determined by the abnormality determination unit when power is supplied;
A switch that is inserted when the display means displays the cause of the abnormality that is inserted into the power supply path to the display means and determined by the abnormality determination unit;
A detection unit including the abnormality determination unit, the tripping coil, the abnormality determination unit, and a first housing in which the tripping coil is housed;
A display unit including the display means, the switch, the display means, and a second housing in which the switch is housed,
The switch has a self-holding function for self-holding an ON state,
The detection unit and the display unit are provided separately,
The detection unit and the display unit further include an inter-unit connection unit for connecting to another unit,
The display unit includes a single display unit as the display means, and a plurality of the display units are provided in one-to-one correspondence with the plurality of abnormal causes,
The detection unit is electrically connected to a plurality of the display units.
A circuit breaker characterized by that. For each of the abnormality causes determined by the abnormality determination unit, the abnormality determination unit turns on the switch to display the abnormality cause on the display means, and at least one of the plurality of abnormality causes Output the trip signal for pulling off the contact of the circuit breaker as the same signal,
The switch is turned on when the display signal is received,
The trip coil trips the circuit breaker contact according to the trip signal.
The circuit breaker according to claim 2. For each of the abnormality causes determined by the abnormality determination unit, the abnormality determination unit turns on the switch and outputs a display signal for displaying the abnormality cause on the display means. When the at least one of the causes of abnormality is determined, a trip signal for tripping the contact of the circuit breaker is output separately from the display signal
The switch is turned on when the display signal is received,
The trip coil trips the circuit breaker contact according to the trip signal.
The circuit breaker according to claim 2. 5. The circuit breaker according to claim 4, wherein the abnormality determination unit outputs the trip signal after outputting the display signal. 6. The circuit breaker according to claim 1, wherein the switch is selected from a thyristor, a triac, and a latching relay. 7. The circuit breaker according to claim 6, wherein the display signal is a current output signal. A detection unit including the abnormality determination unit, the tripping coil, the abnormality determination unit, and a first housing in which the tripping coil is housed;
A display unit including the display unit, the switch, the display unit, and a second housing in which the switch is stored;
The detection unit and the display unit are provided separately,
The detection unit and the display unit further include an inter-unit connection unit for connecting to another unit.
The circuit breaker according to claim 1. The display unit includes, as the display unit, a plurality of display units provided in a one-to-one correspondence with the plurality of abnormal causes,
A plurality of the switches are provided in one-to-one correspondence with the plurality of display units,
Each of the plurality of display units displays the corresponding cause of the abnormality when the corresponding switch is turned on.
9. The circuit breaker according to claim 2, wherein the circuit breaker is provided. 9. The circuit breaker according to claim 2, wherein the display unit includes a single display unit as the display unit and a changeover switch for switching the cause of the abnormality to be displayed on the display unit. The inter-unit connections, circuit breaker apparatus according to any one of claims 2～5,8～10 which is a connector.   The circuit breaker according to claim 1, wherein the abnormality determination unit is configured by a single integrated circuit.

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