JP2018007465A - Seismic breaking device and distribution panel for housing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a seismic breaking device and a distribution panel for housing, which shut down a cable way in a case of the occurrence of house collapse in addition to immediate cutoff of a delay breaker of a main breaker and a part of a branch breaker by one seismic breaking device.SOLUTION: A seismic breaking device comprises: a vibration-sensitive sensor 11 that outputs a signal corresponded to a quake by sensing an earthquake; a seismic breaking device control part 13 that determines the occurrence of the earthquake on the basis of the output signal of the vibration-sensitive sensor 11 in a case where the quake is equal to a predetermined earthquake intensity; an inclination sensor 12 for detecting destruction of a house; a partial shutdown output part 14 that outputs a shutdown signal for making a branch ELB4 provided on a cable way A in response to the earthquake occurrence to shutdown in a moment; and a batch shutdown output part 15 making a main breaker ELB2 to shutdown in delay. The seismic breaking device control part 13 monitors breakout of the cable way A as a shutdown target and a sequential power recovery when determining the earthquake occurrence, and allows the main breaker ELB2 provided on the cable way A to shutdown when the inclination senor 12 detects the destruction of the house or the power recovery.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a seismic shut-off device that outputs a shut-off signal for shutting off a breaker when an earthquake of a predetermined seismic intensity or more occurs, and a residential distribution board incorporating the seismic shut-off device.

  There is a distribution board with a seismic isolation function. For example, in Patent Document 1, when a control unit (earthquake-blocking device) is connected to the main circuit breaker circuit, and the seismic sensor built in the earthquake-breaking device detects an earthquake, the timing of the occurrence of a power failure or A pseudo-leakage current was generated in the connection circuit of the main earth leakage breaker at a predetermined timing such as the power recovery timing, and a batch interruption operation was performed.

JP-A-9-215178

In the above conventional distribution panel, by connecting the seismic shut-off device to the main earth leakage breaker, the power supply to all the loads connected to the secondary side was cut off without incorporating the seismic interrupt function into the main earth leakage breaker. . Residents are able to evacuate smoothly by performing a shut-off operation at a predetermined timing after the occurrence of an earthquake, such as at the time of power recovery, instead of immediately shutting off in response to the occurrence of an earthquake.
However, some electrical devices, such as an electric stove, are desirable to immediately shut off the power supply in response to the occurrence of an earthquake. For this purpose, a seismic shut-off device is required separately. Furthermore, when a house collapses due to an earthquake, it is desirable to block the entire electric circuit without waiting for a predetermined timing.

  Therefore, in view of such problems, the present invention provides a seismic sensing system that shuts off an electric circuit when a collapse occurs in a house, in addition to a collective shut-off by a main breaker and a partial shut-off by a part of branch breakers. It aims at providing a circuit breaker and a distribution board for houses.

In order to solve the above-mentioned problem, a seismic isolation device according to claim 1 is based on a seismic sensor that senses an earthquake and outputs a signal corresponding to the shaking, and based on an output signal of the seismic sensor. If the seismic intensity exceeds the specified seismic intensity, an earthquake determination unit that determines that an earthquake has occurred, an inclination sensor to detect the collapse of a house, and a predetermined branch breaker provided on the branch circuit are immediately A partial cut-off output unit that outputs a cut-off signal for performing a cut-off operation, a blackout / recovery monitoring unit that monitors a power cut of a cut-off target circuit including a branch circuit and a subsequent power return in response to a determination of an earthquake occurrence, When the power failure / recovery monitoring unit detects power recovery, or when the tilt sensor detects the collapse of the house, a collective shutoff output unit that outputs a shutoff signal for shutting down the main breaker provided on the shutoff target circuit; It is characterized by having .
According to this configuration, when an earthquake of a predetermined seismic intensity or higher occurs, a signal that immediately shuts off the branch breaker and a signal that shuts down the main breaker when power is restored after a power failure are output. Electric devices that are prone to occur can be turned off immediately, and lighting necessary for evacuation can be kept on even after an earthquake, enabling smooth evacuation. In addition, since the entire electric circuit is interrupted when the power is restored or the house collapses, the occurrence of a fire can be prevented.

According to a second aspect of the present invention, in the configuration of the first aspect, the interruption signal output from the partial interruption output unit is a pseudo-leakage current generated in the branch circuit, and the branch breaker to be interrupted is a branch leakage breaker It is characterized by.
According to this configuration, since the branch breaker performs a shut-off operation when a pseudo-leakage is generated, it is not necessary to newly provide a breaker that performs a shut-off operation in response to a shut-off signal.

According to a third aspect of the present invention, in the configuration according to the first or second aspect, the interruption signal output by the collective interruption output unit is a pseudo-leakage current generated in the electric circuit to be interrupted, and the main breaker to be interrupted is the main earth leakage breaker. It is characterized by being.
According to this configuration, if a pseudo-leakage is generated, the main breaker performs a breaking operation. Therefore, it is not necessary to newly provide a breaker that performs a breaking operation in response to a breaking signal.

The distribution board for houses according to the invention of claim 4 includes a main breaker to which a lead-in line of the electric circuit is connected, and a plurality of branches connected to the secondary side electric circuit of the main circuit breaker to open and close the branch electric circuit of the electric circuit A breaker and the seismic shut-off device according to any one of claims 1 to 3, wherein a collective shut-off output unit of the seismic shut-off device is connected to shut off the main breaker, and a part of the seismic shut-off device The shut-off output unit is connected to shut off at least one branch breaker.
According to this configuration, when an earthquake of a predetermined seismic intensity or more occurs, a specific branch breaker performs a shut-off operation, and when a power failure occurs after a subsequent power failure or a house collapses, the main breaker performs a shut-off operation. Therefore, an electric device that is prone to fire can be immediately turned off, and lighting necessary for evacuation can be kept on even after an earthquake, and smooth evacuation is possible. In addition, since the entire electric circuit is interrupted when the power is restored or the house collapses, the occurrence of a fire can be prevented.

  According to the present invention, when an earthquake of a predetermined seismic intensity or higher occurs, a specific branch breaker performs a shut-off operation, and when a power failure occurs after a subsequent power failure or a house collapses, the main breaker performs a shut-off operation. Therefore, an electric device that is prone to fire can be immediately turned off, and lighting necessary for evacuation can be kept on even after an earthquake, and smooth evacuation is possible. Moreover, since the whole electric circuit is interrupted at the time of power recovery or when a house collapses, the occurrence of a fire can be prevented.

It is a circuit block diagram which shows an example of the seismic isolation device which concerns on this invention. It is a block diagram of the distribution board for houses incorporating the seismic isolation device of FIG. It is a flowchart which shows the flow of operation | movement of a seismic isolation device.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments embodying the present invention will be described below in detail with reference to the drawings. FIG. 1 is a circuit block diagram showing an example of a seismic isolation device according to the present invention. As shown in FIG. 1, the seismic cutoff device 1 includes a seismic sensor 11 that detects an earthquake and outputs a signal corresponding to the shaking, a tilt sensor 12 that detects the inclination of the installation site, that is, the collapse of the house, and the seismic sensor 11. Based on the output signal, the seismic shut-off device controller 13 for controlling the seismic shut-off device 1, the partial shut-off output unit 14 for outputting the shut-off signal in response to the occurrence of the earthquake, In response, the collective shutoff output unit 15 that outputs a shutoff signal, the alarm output unit 16 that issues an alarm sound upon receiving an earthquake occurrence, and the power supply to each circuit of the seismic shutoff device 1 connected to the electric circuit A power supply unit 17 and the like are provided.

Based on the output signal from the seismic sensor 11, the seismic interrupting device control unit 13 determines whether the shaking is equal to or greater than a predetermined seismic intensity, and outputs an earthquake occurrence signal if the seismic intensity is greater than the specific seismic intensity. The seismic intensity (threshold value), which is a criterion for determining the occurrence of an earthquake at this time, is set in advance, and is set to seismic intensity 4, 5 weak, 5 strong, 6 weak or the like. For example, if the seismic intensity is set to 5 or less, an earthquake occurrence signal is output if the seismic intensity is determined to be 5 or less.
In addition, the seismic interrupting device control unit 13 monitors the power outage / recovery of the electric circuit from the voltage information of the power supply unit 17, and if a power outage is detected, stores the occurrence of the power outage in a storage unit (not shown). Information about the occurrence of the power failure is stored and held in, for example, a nonvolatile memory. When power is restored, it is determined that power has been restored based on the information stored in the storage unit, and predetermined control described later is started.

  Note that the seismic sensor 11 and the tilt sensor 12 both detect the degree of shaking or tilt using an acceleration sensor, and therefore may be integrated.

FIG. 2 shows a configuration diagram of a residential distribution board (hereinafter simply referred to as “distribution board”) 10 in which the seismic shock interrupter 1 is incorporated. As shown in FIG. 2, the distribution board 10 has a plurality of branch circuits B1, B2 from a single-phase three-wire circuit (electric circuit) A composed of two voltage phases L1, L2 and a neutral phase N. Forming. Reference numeral 2 denotes a main earth leakage breaker (main ELB) having an electric leakage interruption function, and reference numerals 3 and 4 denote branch breakers.
However, among the branch breakers 3 and 4, 3 is a branch breaker that does not have a leakage breaker function, and 4 is a branch leakage breaker (branch ELB) that has a leakage breaker function and has three terminals. The branch ELB4 is a branch breaker that operates in response to a cutoff signal from the seismic shutdown device 1. The power source side 3 terminal is connected to all of the electric circuit A2 composed of single-phase 3 wires, and the load side 3 terminal has 2 terminals. Connected to the branch circuit B2, the remaining one terminal is connected to the seismic isolation device 1 via a connection line T3.

The primary side of the main ELB2 is connected to a lead-in line (primary side electric circuit A1) of the electric circuit A, and the branch breaker 3 or the branch ELB4 is connected to the secondary side electric circuit A (secondary side electric circuit A2).
The seismic interrupting device 1 is connected in parallel with the main ELB2 and also in parallel with the branch ELB4. When an earthquake of a specific seismic intensity or more occurs, a pseudo-leakage is generated in the electric circuit A sandwiching the main ELB2, thereby causing the main The ELB 2 is cut off, and the branch ELB 4 is cut off by generating a pseudo-leakage in the branch circuit B 2.

Here, the outputs of the partial cutoff output unit 14 and the collective cutoff output unit 15 will be described. The partial cut-off output unit 14 is an output unit that generates pseudo-leakage in the branch circuit B2, and the collective cut-off output unit 15 is an output unit that generates pseudo-leakage in the circuit A.
The partial cut-off output unit 14 is connected to one voltage phase L1 of the two voltage phases L1 and L2 of the secondary terminal of the branch ELB4 via the connection line T3. On the other hand, the seismic isolation device 1 is connected to the neutral phase N of the secondary side electric circuit A2 by a connection line T2, and a bypass electric circuit that does not pass the branch ELB4 between the connection line T2 and the connection line T3, That is, when a circuit for passing a pseudo leakage current is formed and the partial cutoff output unit 14 outputs a cutoff signal, the pseudo leakage current flows through the connection line T3.

  The collective cutoff output unit 15 is connected to the voltage line L2 of the lead-in line A1 through the connection line T1. And, between this connection line T1 and the connection line T2 connected to the neutral line N of the secondary side electric circuit A2, a bypass circuit that does not pass through the main ELB2, that is, an electric circuit for flowing a pseudo leakage current is formed. When the collective cut-off output unit 15 outputs a cut-off signal, a pseudo-leakage current flows through the connection line T1.

  In addition, the power supply part 17 of the seismic shock interrupting device 1 is fed from the secondary side electric circuit A2 of the main ELB2, and the power line connected to the neutral line N is connected among the two connected power lines. It also serves as the line T2 (shown in FIG. 1).

The distribution board 10 configured as described above operates as follows in response to the occurrence of an earthquake. FIG. 3 shows the flow of the operation of the seismic isolation device 1 and will be described with reference to FIG.
First, the seismic isolation device controller 13 constantly monitors the inclination of the house, and if the inclination sensor 12 detects a predetermined inclination, it determines that the house has collapsed (YES in S1), and from the collective interruption output part 15 A shut-off signal is output. That is, a current path is formed via the connection line T1 and the connection line T2 to generate a pseudo-leakage in the electric circuit A. Thus, the main ELB2 is shut off (S7).

  If the collapse of the house is not detected (NO in S1), the signal output from the seismic sensor 11 is monitored and the magnitude of the shake is compared with a preset threshold value. As described above, the threshold value is set by seismic intensity. For example, if the seismic intensity is set to 5 weak, if it is determined that the shaking is seismic intensity 5 or lower (YES in S2), a cutoff signal is sent from the partial cutoff output unit 14. Output. That is, a current is caused to flow through the electric circuit composed of the connection line T3 and the connection line T2 to generate a pseudo-leakage, thereby cutting off the branch ELB4. At the same time, the alarm output unit 16 is activated to notify that a part of the branch circuit has been cut off due to the occurrence of the earthquake (S3).

  Thereafter, no power failure occurs (NO in S4), and if the inclination sensor 12 detects a predetermined inclination due to an earthquake, it is determined that the house has collapsed (YES in S6), and a shutoff signal is output from the collective shutoff output unit 15 . That is, a current path is formed via the connection line T1 and the connection line T2 to generate a pseudo-leakage in the electric circuit A. Thus, the main ELB2 is shut off (S7).

  On the other hand, if a power failure occurs after the branch ELB4 is immediately shut off (YES in S4), the information is stored and the power recovery is awaited. After that, when power is restored, it is determined that power is restored from the stored power outage information (YES in S5), a shutoff signal is output from the collective shutoff output unit 15, and the main ELB2 is shut down in the same manner as when the house collapses. Operate (S7).

In this way, when an earthquake of a predetermined seismic intensity or more occurs, the branch ELB4 which is a specific branch breaker is shut off, and the main ELB2 is shut off when power is restored after a power failure or the house collapses. Operate. As a result, electric devices that are prone to fire can be turned off immediately, and lighting necessary for evacuation can be kept on even after an earthquake, enabling smooth evacuation. Furthermore, since the entire electric circuit is interrupted when the power is restored or the house collapses, the occurrence of a fire can be prevented.
In addition, since the leakage breaker (ELB) is detected to cause a leakage, it is not necessary to newly provide a breaker that operates in response to a cutoff signal.

In addition, although the said embodiment demonstrated the interruption | blocking of the single phase three-wire electric circuit, the said seismic-sensing interruption | blocking apparatus is applicable also to a single phase two-wire electric circuit or a three-phase three-wire electric circuit. .
Moreover, although the earth leakage breaker is cut off by generating a pseudo earth leakage, it may be operated by installing a dedicated breaker that operates upon receiving an interruption signal without using the earth leakage breaking function.

  1 ・ ・ Earthquake breaker 2 ・ ・ Main earth leakage breaker 3 ・ ・ Branch breaker 4 ・ ・ Branch ELB (branch breaker) 10 ・ ・ Distribution panel for houses 11 ・ ・ Seismic sensor 12 ・ ・Inclination sensor, 13 .... Seismic shut-off device control unit (earthquake judgment unit, power failure / recovery monitoring unit), 14 .... Partial shut-off output unit, 15 .... Batch shut-off output unit, 16 .... Alarm output unit, 17. ·Power supply part.

Claims (4)

A seismic sensor that detects an earthquake and outputs a signal in response to the shaking;
Based on the output signal of the seismic sensor, an earthquake determination unit that determines that an earthquake has occurred if the shaking is equal to or greater than a predetermined seismic intensity,
An inclination sensor to detect the collapse of the house,
In response to the determination of the occurrence of the earthquake, a partial cut-off output unit that outputs a cut-off signal for immediately cut-off operation of a predetermined branch breaker provided on the branch electric circuit;
In response to the determination of the occurrence of the earthquake, a power failure / recovery monitoring unit that monitors a power failure of the interruption target circuit including the branch circuit and a subsequent power recovery;
When the power failure / recovery monitoring unit detects power recovery, or when the tilt sensor detects the collapse of a house, collective shutoff that outputs a shutoff signal for shutting down the main breaker provided on the shutoff target circuit An earthquake-sensing cutoff device comprising an output unit.   2. The earthquake-sensitive circuit breaker according to claim 1, wherein the cut-off signal output from the partial cut-off output unit is a pseudo-leakage current generated in the branch circuit, and the branch breaker to be cut off is a branch circuit breaker. .   3. The feeling according to claim 1, wherein the interruption signal output by the collective interruption output unit is a pseudo leakage current generated in the interruption target circuit, and the main breaker to be interrupted is a main leakage breaker. Seismic cutoff device. The main circuit breaker to which the lead-in line of the electric circuit is connected, a plurality of branch circuit breakers connected to the secondary side electric circuit of the main circuit breaker to open and close the branch circuit circuit of the electric circuit, and any one of the above claims 1 to 3 And the seismic isolation device described in
A collective shut-off output unit of the seismic shut-off device is connected to shut off the main breaker, and a partial shut-off output unit of the seismic shut-off device is connected to shut off at least one of the branch breakers. A residential distribution board characterized by that.

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