JP2019208310A - Circuit interruption system - Google Patents

Abstract

To provide a system provided with a circuit in which power supply is interrupted when another abnormality is detected in addition to detection of shake caused by an earthquake apart from a circuit in which power supply is interrupted by detection of shake caused by an earthquake.SOLUTION: A circuit interruption system 1 provided with a seismic device 11 for outputting a signal when an earthquake equal to or larger than a prescribed threshold value is detected, includes: an abnormality detection device 12 for outputting a signal when abnormality different from shake of an earthquake is detected; a first circuit 13 that is interrupted by a signal output from the seismic device; and a second circuit 14 that is interrupted by both signal output from the seismic device and signal output from the abnormality detection device.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a circuit interruption system.

  As described in Patent Document 1, it is known that when an earthquake occurs, a fire is prevented by interrupting a circuit and cutting off power supply to a load by a signal output from a seismic sensing device.

JP-A-11-89078

  By the way, there are loads such as security devices and emergency lighting that are not preferable to be cut off just because an earthquake has occurred. On the other hand, there is a possibility that it may be preferable to cut off such a load because an event different from the shaking generated during the earthquake occurs.

  The inventor of the present case tried to solve the problem by intensively examining this point. An object of the present invention is to provide a circuit that cuts off the power supply when other abnormalities are detected in addition to the detection of the shake due to the earthquake, in addition to the circuit that cuts off the power supply due to the detection of the shake caused by the earthquake. Is to provide a system.

  In order to solve the above problems, a circuit breaker system equipped with a seismic device that outputs a signal when an earthquake exceeding a predetermined threshold is detected, and outputs a signal when an abnormality different from an earthquake shake is detected. To be shut off by both the signal output from the seismic device and the signal output from the anomaly detecting device. And a second circuit.

  The abnormality detection device preferably outputs a signal when detecting an abnormality in the wiring path of the second circuit or an abnormality in a load supplied with power through the second circuit.

  The abnormality detection device preferably outputs a signal when a discharge accident that has occurred on the wiring path is detected.

  In the present invention, in addition to the circuit in which the power supply is cut off by the detection of the shake due to the earthquake, in addition to the detection of the shake due to the earthquake, a system provided with a circuit in which the power supply is cut off when another abnormality is detected. It becomes possible to provide.

It is the schematic of the circuit interruption | blocking system in a 1st example. It is the flowchart which showed the example which interrupts | blocks a 1st circuit and a 2nd circuit after the occurrence of an earthquake. It is the schematic of the circuit interruption | blocking system in a 2nd example. It is the schematic of the circuit interruption | blocking system in a 3rd example. It is the schematic of the circuit interruption | blocking system in a 4th example.

  The form for implementing this invention is shown below. As understood from FIG. 1, the circuit interruption system 1 according to the present embodiment includes a seismic sensing device 11 that outputs a signal when an earthquake having a predetermined threshold value or more is detected. In addition, the circuit interruption system 1 includes an abnormality detection device 12 that outputs a signal when an abnormality different from an earthquake shake is detected, and a first circuit that is interrupted by a signal output from the seismic sensing device 11. 13, and a second circuit 14 that is shut off by the signal output from the seismic sensing device 11 and the signal output from the abnormality detection device 12 together. For this reason, in addition to the “circuit that cuts off power supply due to the detection of shaking due to an earthquake,” a circuit that cuts off power supply when other abnormalities are detected in addition to the detection of shaking caused by an earthquake is provided. System can be provided.

  First, the first example will be described. As shown in FIG. 1, the circuit breaker system 1 of the first example includes a main breaker 15 to which electric power is sent from a commercial power source 91, and a branch breaker 16 disposed between the main breaker 15 and each load. I have. In addition, a seismic sensing device 11 that outputs a signal to a breaker to be interrupted when an earthquake exceeding a predetermined threshold occurs, and an anomaly detection device 12 that detects an anomaly that has occurred in a load or an electric circuit due to the earthquake are provided.

  A plurality of circuits are formed on the distribution board 40 provided with the circuit interruption system 1. More specifically, the circuit interruption system 1 includes a first circuit 13 that is interrupted by a signal output from the seismic sensing device 11 and a second circuit 14 that is interrupted by a signal output from the abnormality detection device 12. ing. The first circuit 13 is cut off when an earthquake shake is detected, while the second circuit 14 is cut off when an earthquake shake detection and an abnormality other than the earthquake shake are detected. Therefore, even if the signal output from the abnormality detection device 12 is not performed, the first circuit 13 is shut off if the signal is output from the seismic sensing device 11, but the second circuit 14 is not connected to the abnormality detection device 12. If both the signal output from 12 and the signal output from the seismic sensing device 11 are not made, they are not cut off.

  The abnormality detection device 12 is a noise generated when a discharge occurs due to a discharge accident such as a spark discharge or an arc discharge caused by a disconnection or a ground fault caused by an earthquake on a wiring path, a contact failure of a terminal portion or a plug, or the like. It is preferable to detect by. The abnormality detection device 12 of the present example determines the occurrence of a discharge accident by taking out noise in the target frequency band by the filter unit and comparing the noise level amplified by the amplification unit with a threshold value. When it is determined that a discharge accident has occurred, a signal is output to the breaker constituting the second circuit 14 and the second circuit 14 is shut off.

  The abnormality detection device 12 preferably outputs a signal when detecting an abnormality in the wiring path of the second circuit 14 or an abnormality in the load 32 to which power is supplied through the second circuit 14. In this way, the second circuit 14 can be shut off by detecting an abnormality that has occurred on the second circuit 14 side that is still shut off even after the seismic sensing device 11 is activated (see FIG. 2).

  Moreover, it is preferable that the abnormality detection device 12 outputs a signal when a discharge accident that has occurred on the wiring path is detected. In addition, a low-pass filter that cuts off high-frequency noise is arranged on the primary side and the secondary side of the filter unit that includes a high-pass filter that extracts high-frequency noise, so that a path through which noise enters the abnormality detection device 12 can be obtained. It is preferable to limit. In this way, the detection of the abnormality of the wiring path of the second circuit 14 and the detection of the abnormality of the load 32 to which power is supplied through the second circuit 14 can be classified as an abnormality of the first circuit 13. Further, control is performed so as to determine whether or not to output a signal from the abnormality detection device 12 with reference to a change over time such as a current value so that noise caused by opening / closing of the switch and noise caused by arc discharge can be discriminated. Is preferred.

  In the present invention, electrical measurement values such as circuit or load current, voltage, power, power factor, and leakage current value are compared before and after the earthquake. It is good also as what determines with having generate | occur | produced. For example, when the current value is significantly increased after the earthquake, there is a possibility that a leakage current or a short-circuit accident has occurred. It is preferable to output a signal.

  The abnormality detection device 12 may determine a building abnormality in addition to an electrical abnormality. For example, if the natural period or natural frequency of a building changes significantly before and after an earthquake, an abnormality such as deterioration or cracking of the building may occur. It is preferable to output.

  In addition, when position sensors are provided at multiple locations including the low and high locations of the building, if the position before and after the earthquake is compared using these position sensors, It can be determined that there is a risk of building tilt. For this reason, when such a difference arises, it is preferable to output a signal from the abnormality detection device 12.

  Further, a leak from the water distribution pipe due to an earthquake may be detected by a submersion sensor or the like, and a signal may be output from the abnormality detection device 12 when a leak from the water distribution pipe is detected. As described above, when there is an abnormality in the building, the second circuit 14 is cut off even if there is no abnormality in the wiring path of the second circuit 14 or the load 32 connected to the secondary side of the second circuit 14. It is preferable to do.

  The first circuit 13 of the present example is a load 31 having a high fire risk among the circuits formed on the secondary side of the main breaker 15 (highly likely to cause a fire having a heat source such as an electric stove or an electric heater). The power supply to the load 31 having a high fire risk can be stopped by being cut off. The second circuit 14 is provided separately from the first circuit 13, and in this example, the second circuit 14 is a circuit other than the first circuit 13 among the circuits formed on the secondary side of the main breaker 15.

  In this example, the seismic sensing device 11 is installed in the distribution board 40. This seismic sensing device 11 outputs a cut-off signal to all branch breakers 16 constituting the first circuit 13 when an earthquake of a predetermined threshold value or more is detected. Thereby, the first circuit 13 serving as a path for supplying power to the load 31 having a high fire risk is blocked by an earthquake of a predetermined threshold value or more, but the other second circuits 14 are not blocked.

  The seismic sensing device 11 of this example also outputs a signal that detects an earthquake to the abnormality detection device 12. Upon receiving the earthquake detection signal, the abnormality detection device 12 determines whether an abnormality has occurred on the wiring path of the second circuit 14. The abnormality detection device 12 may determine whether or not an abnormality has occurred even when there is no earthquake detection signal, but preferably outputs a signal when both an earthquake and an abnormality are detected.

  The abnormality detection device 12 outputs a cutoff signal to the main breaker 15 or the branch breaker 16 constituting the second circuit 14. When the main breaker 15 is turned off, the power supply is cut off in all the second circuits 14. When outputting a cut-off signal to the branch breaker 16, the power supply of only the specific branch breaker 16 in which an abnormality has occurred may be cut off. The position of the abnormality detection device 12 is not limited to the secondary side of the main breaker 15 and may be provided at a preferable position for detecting an abnormality.

  Next, a second example will be described. As shown in FIG. 3, the seismic sensing device 11 is an outlet-type seismic sensing device 11 connected to a plug 51 on the secondary side of the branch breaker 16 constituting the first circuit 13. In the case of the outlet-type seismic device 11, the power supply to the load 31 may be cut off by opening a contact provided in the seismic device 11 after the earthquake is detected. A blocking signal may be output.

  The distribution board 40 may include a determination device 17 serving as an output destination of signals from the seismic sensing device 11 and the abnormality detection device 12. When the determination device 17 receives a signal from the seismic device 11 and a signal from the abnormality detection device 12, the determination device 17 outputs a cutoff signal to cut off the power supply in order to shut off the second circuit 14. In the example shown in FIG. 3, the cutoff signal is output toward the main breaker 15.

  When there are a plurality of seismic devices 11, vibrations differ depending on the installation location of the seismic device 11, and it is also conceivable that there are some that do not exceed a predetermined threshold. For this reason, when a signal is received from the seismic sensing device 11 having a predetermined ratio or more, such as a majority or more, and the abnormality detection device 12, a cut-off signal may be output.

  Further, the installation location of the seismic device 11 and the location of the wiring path that is the detection target of the abnormality detection device 12 are stored in the determination device 17, and the floor or floor where the ratio of the seismic device 11 that outputs the interruption signal is large. If an abnormality occurs due to the above, only the branch breaker 16 connected to the wiring path may be blocked.

  Next, a third example will be described. In this example, as shown in FIG. 4, the first circuit 13 is provided on the secondary side of the main breaker 15, and the second circuit 14 is provided on the primary side of the main breaker 15. The load 32 connected to the branch breaker 16 constituting the second circuit 14 at this time is a disaster prevention-related, crime-related, or medical-related load that wants to maintain power supply even after an earthquake. Disaster prevention-related loads include automatic fire alarm equipment, fire extinguishing equipment, lighting equipment, and the like. The security-related load includes a security system, an electric lock, an electronic lock, and the like. Medical-related loads include life support devices such as ventilators and heart-lung machines.

  The seismic sensing device 11 in the example shown in FIG. 4 is a breaker integrated type integrated with the main breaker 15. In this way, since the power of the seismic device 11 is supplied from the breaker, a power line for supplying power to the seismic device 11 becomes unnecessary. Further, since a signal line for outputting a signal to the breaker is also incorporated, wiring can be reduced.

  In this example, when an earthquake occurs and the seismic sensor in the seismic sensing device 11 detects a vibration of a predetermined threshold value or more, a cutoff signal is output to the main breaker 15. As a result, power supply to the first circuit 13 on the secondary side of the main breaker 15 is cut off. In this state, the power supply to the second circuit 14 is maintained. Further, when an abnormality is detected on the wiring path of the second circuit 14, a cutoff signal is output to all the branch breakers 16 constituting the second circuit 14 and shuts off.

  Next, a fourth example will be described. In this example, as shown in FIG. 5, the circuit interruption system 1 includes a first distribution board 41 provided with the first circuit 13 and a second distribution board 42 provided with the second circuit 14. The first distribution board 41 of this example includes the first circuit 13 on the secondary side of the seismic sensing device 11 and the main breaker 15. The second distribution board 42 includes a switching device 18 that switches between power supply from the secondary side of the main breaker 15 of the first distribution board 41 and power supply from the emergency storage battery 53, and the secondary distribution board 42. A second circuit 14 is provided on the side. The abnormality detection device 12 may be provided at an arbitrary position of the second distribution board 42, but is provided so as to be interposed between the second circuit 14 and the switching device 18 in this example.

  The switching device 18 of the second distribution board 42 is in a state where power is supplied to the second circuit 14 from the secondary side of the main breaker 15 of the first distribution board 41 in the normal state. On the other hand, when the main breaker 15 of the first distribution board 41 is cut off due to the occurrence of an earthquake and the power supply from the first distribution board 41 to the second distribution board 42 is cut off, It is switched so that it can be supplied from the storage battery 53 to the second circuit 14.

  At this time, it is preferable that the switching device 18 is switched by outputting a power failure signal indicating that the power supply to the secondary side of the main breaker 15 is cut off to the switching device 18, but the power failure signal is The output device may be provided in either the first distribution board 41 or the second distribution board 42. Further, any means for switching by the switching device 18 may be used. Note that there may be three or more distribution boards.

  As described above, the present invention has been described by taking the embodiment as an example. However, the present invention is not limited to the above-described embodiment, and various aspects can be adopted. For example, the housing in which the seismic device or the like is housed need not be a distribution board.

DESCRIPTION OF SYMBOLS 1 Circuit interruption system 11 Seismic device 12 Abnormality detection device 13 1st circuit 14 2nd circuit 32 Load (load connected to 2nd circuit)

Claims (3)

A circuit breaking system including a seismic device that outputs a signal when an earthquake exceeding a predetermined threshold is detected,
An anomaly detector that outputs a signal when an anomaly different from an earthquake shake is detected;
A first circuit that is interrupted by signal output from the seismic device;
A second circuit that is shut off by both the signal output from the seismic sensing device and the signal output from the abnormality detection device;
Circuit breaker system equipped with.   2. The circuit interruption system according to claim 1, wherein the abnormality detection device outputs a signal when detecting an abnormality of the wiring path of the second circuit or an abnormality of a load supplied with power through the second circuit.   The circuit interruption system according to claim 1 or 2, wherein the abnormality detection device outputs a signal when a discharge accident occurring on the wiring path is detected.

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