JP2017034909A - Seismic interruption system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a seismic interruption system capable of achieving both of instantaneous breaker and delay breaker without largely changing configuration of a conventional distribution board.SOLUTION: A vibration-sensitive device 4 which calculates seismic intensity after detecting an earthquake and outputs interruption signals if the seismic intensity is equal to or more than a predetermined seismic intensity is installed in a distribution board. The vibration-sensitive device 4 includes: a first trip circuit 41a for immediately outputting the interruption signals in response to the occurrence of the earthquake; and a second trip circuit 41b for outputting the interruption signals after the passage of a predetermined time. In both trip circuits 41a, 41b, a dummy leak current generating circuit is formed which makes a dummy leak current flow through a master earth leakage breaker 1 and an earth leakage breaker 2 of an interruption object, and the interruption signals are made to be the dummy leak current.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a seismic isolation system that operates in a circuit breaker when it is installed in a distribution board and detects the occurrence of an earthquake.

Conventionally, there is a distribution board equipped with a seismic device that automatically shuts off the main breaker (main earth leakage breaker) from the viewpoint of safety when an earthquake of a certain seismic intensity or more is detected (for example, refer to Patent Document 1). In a house equipped with a door using an electric lock, an apparatus that shuts down only an electrical device that needs to be shut off instantaneously has been proposed in order to cause safety problems such as evacuation if it is shut off immediately after the occurrence of an earthquake.
For example, in Patent Document 2, if a vibration detection circuit is provided to detect a vibration of a predetermined value or more, a master unit that wirelessly transmits a shut-off signal is installed separately from the distribution board, and an outlet to which a device that immediately shuts off is connected Is provided with a function to receive the shut-off signal transmitted by the base unit and shut off the outlet output, and only a specific outlet is shut off immediately.

Japanese Patent Application Laid-Open No. 2005-2102498 JP 2010-29004 A

As described above, while there are devices that immediately shut off all the electric circuits, there are circuit breakers that are configured to immediately cut off only some of the electric circuits. A distribution board provided with a delay cut-off circuit is preferable because it can cope with any situation and does not require an outlet having a wireless function.
However, when trying to make a distribution board with such a function, instantaneous interruption and delay interruption are incompatible, and when the main earth leakage breaker of the distribution board is operated in a delayed manner, it is parallel to this main earth leakage breaker. A new circuit must be provided by providing a breaker for instantaneous interruption. In this case, the distribution board becomes large, and the cost is greatly increased.

  Therefore, in view of such problems, the present invention aims to provide a seismic isolation system that can realize both instantaneous interruption and delayed interruption without greatly changing the configuration of a conventional distribution board. .

In order to solve the above problems, the invention of claim 1 is a seismic sensor that detects an earthquake, a seismic intensity calculator that calculates a seismic intensity from a seismic signal output from the seismic sensor, and the calculated seismic intensity is a predetermined seismic intensity. In the case of the above, there is a seismic seismic shutoff system in which a seismic seismic device having a shutoff signal output unit for outputting a shutoff signal for shutting off the circuit breaker is installed in the distribution board,
The shut-off signal output unit has a first output unit that outputs a shut-off signal immediately upon occurrence of an earthquake, and a second output unit that outputs a shut-off signal after a predetermined time has elapsed,
One of the circuit breakers in the distribution board is connected to each of the first output unit and the second output unit.
According to this configuration, since the seismic device outputs two types of signals, immediate interruption and delayed interruption, a circuit breaker that instantaneously operates upon occurrence of an earthquake and a circuit breaker that operates after a certain time has elapsed. It can be installed in the same distribution board, and both instantaneous interruption and delayed interruption can be realized in one distribution board without greatly changing the configuration of the conventional distribution board.

According to a second aspect of the present invention, in the configuration of the first aspect, the first output unit and the second output unit form a pseudo-leakage current generation circuit that causes a pseudo-leakage current to flow to the circuit breaker to be interrupted. The interruption signal is a pseudo-leakage current, and the circuit breaker to be interrupted is an earth leakage circuit breaker.
According to this configuration, the circuit breaker that operates in response to the interruption signal may be an earth leakage circuit breaker, and it is not necessary to newly prepare a dedicated circuit breaker.

According to a third aspect of the present invention, in the configuration of the second aspect, the circuit breaker that operates in response to the cut-off signal output from the second output unit is a main circuit breaker, and the cut-off signal output from the first output unit The circuit breaker which receives and performs the breaking operation is an earth leakage breaker connected to the secondary side of the main earth leakage breaker.
According to this configuration, an electric circuit that is immediately interrupted upon occurrence of an earthquake and an electric circuit that is interrupted with a delay can be configured by one common electric circuit, and can be easily realized without changing the configuration of the conventional distribution board.

According to a fourth aspect of the present invention, in the configuration according to any one of the first to third aspects, the seismic sensor is configured by a triaxial acceleration sensor.
According to this configuration, since the seismic sensor does not limit the installation direction, it is possible to install the seismic device upside down, and it is possible to effectively utilize the empty area of the distribution board.

  According to the present invention, since the breaker that instantaneously cuts off in response to the occurrence of an earthquake and the breaker that breaks after a certain period of time are installed in the same distribution board, the configuration of the conventional distribution board It is possible to realize both instantaneous interruption and delay interruption in one distribution board without greatly changing the.

It is a lineblock diagram showing an example of a seismic isolation system concerning the present invention. It is a block diagram of a seismic sensing device. It is a flowchart which shows the flow of operation | movement of a seismic sensing system.

  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 configuration diagram showing an example of a seismic isolation system according to the present invention, and shows a configuration of a device assembled to a distribution board. In FIG. 1, 1 is a main earth leakage breaker (leakage breaker), 2 is a leakage breaker (leakage breaker), 3 is a branch breaker, 4 is a seismic device that outputs a breaking signal when an earthquake is detected, The switchboard case is shown.

Three primary-phase three-wire power lines K1 drawn from the commercial power system are connected to the primary side of the main earth leakage breaker 1, and branch wiring is performed on the secondary side of the main earth leakage breaker 1. A main electric circuit K2 including a main bar 5 arranged in a straight line is connected. An earth leakage breaker 2, a plurality of branch breakers 3, and a seismic sensing device 4 are connected to the main bar 5. L1 and L2 are voltage phases, and N is a neutral phase.
Then, an electric device such as an air conditioner, a refrigerator, and lighting is connected to the end of the branch circuit extending from the secondary side terminal (load side terminal) of the leakage breaker 2 and the branch breaker 3. However, the air conditioner and the refrigerator are connected via a wall outlet (not shown).

  The main earth leakage breaker 1 is an earth leakage breaker generally referred to as a main circuit breaker. When an electric leakage occurs in the main electric circuit K2, or a predetermined current value (for example, 60 amperes) in which the current flowing through the main electric circuit K2 is a contract current. If it exceeds, it will shut off. The earth leakage breaker 2 operates when a leakage occurs in the branch circuit connected to the load side terminal, and operates when a current exceeding the rated current of 20 amperes flows. And the branch breaker 3 will carry out interruption | blocking operation, if the electric current which flows into the branch electric circuit connected to the load side terminal exceeds a rated current.

The seismic sensing device 4 is supplied with power from the main bar 5 and outputs a cut-off signal when an earthquake having a seismic intensity equal to or higher than that set in advance occurs. However, the interruption signal is a pseudo earth leakage current, and the circuit breaker to be interrupted is limited to the earth leakage circuit breaker.
Specifically, in order to cause a pseudo-leakage current to flow to the earth leakage breaker, a trip circuit 41 serving as an interruption signal output unit constituted by a relay circuit is provided, and the interruption targets are the main earth leakage breaker 1 and the earth leakage breaker 2.
The trip circuit 41 includes a first trip circuit 41a serving as a first output section that causes a pseudo-leakage current to flow to the leakage breaker 2, and a second trip section serving as a second output section that causes a pseudo-leakage current to flow to the main leakage breaker 1. A circuit 41b, and a cut-off signal output unit including two relay circuits.
Note that the trip circuit 41 is connected to predetermined terminals of the power supply side terminal and the load side terminal of the leakage breaker to be controlled for breaking to form a pseudo leakage current generation circuit.

  FIG. 2 shows a more detailed circuit block diagram of the seismic sensing device 4. In addition to the first trip circuit 41a and the second trip circuit 41b, as shown in FIG. A seismic sensing device CPU 43 for controlling the seismic device 4 is provided. Reference numeral 43a denotes a timer for counting a predetermined time.

  The seismic sensor 42 is a known acceleration sensor that detects acceleration in three axes, stores the mounting state when the power is turned on as a basic posture, and detects the magnitude of the earthquake when detecting acceleration in the three axes due to the occurrence of an earthquake. A signal (seismic signal) proportional to the height (the magnitude of acceleration) is output.

The seismic sensing device CPU 43 calculates the seismic intensity from the seismic signal output from the seismic sensor 42 and determines the earthquake. If it is determined that the earthquake has a predetermined seismic intensity or higher (for example, an earthquake with a seismic intensity of 5 or higher), the interruption control is started.
The shut-off control is performed as follows. FIG. 3 shows a flow of shut-off control, which will be described with reference to FIG. If the seismic device CPU43 detects the occurrence of an earthquake (Yes in S1), that is, if the earthquake detected by the seismic sensor 42 is an earthquake having a preset seismic intensity or higher, the first trip circuit 41a is activated. To generate a pseudo-leakage current immediately. As a result, a pseudo leakage current flows to the leakage breaker 2 to which the first trip circuit 41a is connected, so that the circuit breaker operates (S2), and the electric device connected to the electric circuit branched via the leakage breaker 2 Turn off.

  The seismic sensing device CPU 43 starts a timer 43a upon detecting the occurrence of an earthquake, and starts counting for a certain time (for example, 3 minutes) (S3). Thereafter, when a certain time has elapsed, the second trip circuit 41b is operated to generate a pseudo leakage current. As a result, a pseudo earth leakage current flows to the main earth leakage breaker 1 to which the second trip circuit 41b is connected to perform a cutoff operation (S4), and all electric devices in the dwelling unit are turned off.

In this way, the circuit breaker that operates immediately after the occurrence of an earthquake and the circuit breaker that operates with a delay after a certain period of time are installed in the same distribution panel. Both instantaneous interruption and delayed interruption can be realized in one distribution board without greatly changing the configuration. And since the circuit breaker which carries out the interruption | blocking operation | movement in response to the interruption | blocking signal is the main earth leakage breaker 1 and the earth leakage breaker 2, it is not necessary to newly produce an exclusive circuit breaker.
In addition, since the electric circuit that cuts off immediately after the occurrence of an earthquake and the electric circuit that cuts off after a delay are composed of one common electric circuit (main electric circuit L2), it is easily realized without changing the configuration of the conventional distribution board. it can.
Furthermore, since the seismic sensor 42 does not limit the installation direction, the seismic device 4 can be installed upside down, and the empty area of the distribution board can be used effectively.

  In the above embodiment, the two trip circuits 41a and 41b are used to cut off the one earth leakage breaker 2 and the two earth leakage breakers of the main earth leakage breaker 1, but the first and second trip circuits 41a. , 41b may be provided with a plurality of circuits, and providing a plurality of first trip circuits 41a that perform an immediate disconnection operation is convenient for immediately disconnecting a plurality of electrical devices, and a plurality of second trip circuits 41b may be provided. For example, even if the main leakage breaker 1 is not cut off, a plurality of earth leakage breakers can be delayed and cut off at the same time.

  1 .... Main earth leakage breaker (leakage breaker) 2 .... Leakage breaker (leakage breaker) 3 .... Branch breaker 4 .... Seismic device 41 ... Trip circuit (breaking signal output part) 41a ... First trip circuit (first output unit) 41b Second trip circuit (second output unit) 42 Seismic sensor 43 43 Seismic device CPU (seismic intensity calculation unit) K2 main Electric circuit.

Claims (4)

A seismic sensor that detects an earthquake, a seismic intensity calculation unit that calculates a seismic intensity from the seismic signal output by the seismic sensor, and a shut-off for operating the circuit breaker when the calculated seismic intensity exceeds a predetermined seismic intensity A seismic seismic shut-off system in which a seismic seismic device having a shut-off signal output unit for outputting a signal is installed on a distribution board,
The shut-off signal output unit has a first output unit that outputs a shut-off signal immediately upon occurrence of an earthquake, and a second output unit that outputs a shut-off signal after a predetermined time has elapsed,
Any one of a plurality of circuit breakers assembled to the distribution board is connected to each of the first output unit and the second output unit, and receives a cut-off signal to perform a cut-off operation. Shut-off system. The first output unit and the second output unit form a pseudo-leakage current generation circuit that sends a pseudo-leakage current to the circuit breaker to be interrupted,
The seismic-insulation interrupting system according to claim 1, wherein the interrupting signal is a pseudo-leakage current, and the circuit breaker to be interrupted is an earth leakage circuit breaker.   The circuit breaker that operates in response to the interruption signal output from the second output unit is a mains earth leakage breaker, and the circuit breaker that operates in response to the interruption signal output from the first output unit is the main circuit breaker. The seismic isolation circuit breaker according to claim 2, wherein the circuit breaker is connected to the secondary side.   The seismic sensory interrupting system according to any one of claims 1 to 3, wherein the seismic sensor comprises a three-axis acceleration sensor.

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