JP2018082566A - Earthquake sensitive shutoff system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an earthquake sensitive shutoff system capable of testing a shutoff function of a branch breaker that performs shutoff operation by an earthquake detection signal from an earthquake sensitive relay by operation of the earthquake sensitive relay.SOLUTION: An earthquake sensitive shutoff system includes: a trunk breaker 1 for shutting off a main electric circuit M connected with a commercial power source; a plurality of branch breakers 2 for shutting off branch electric circuits branching from a secondary side of the trunk breaker 1; and an earthquake sensitive relay 3 for sensing the occurrence of an earthquake. The earthquake sensitive relay 3 includes: a pseudo ground leakage output unit 35 for implementing delayed shutoff of the trunk breaker 1 upon detecting an earthquake with a prescribed earthquake intensity or more; an external communication unit 38 for immediately outputting an earthquake detection signal; and a test/reset button 37 for outputting the earthquake detection signal as a test signal. On the other hand, part of the branch breakers 2 are made breakers 2b with an external shutoff function for performing shutoff operation upon receiving the earthquake detection signal.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a seismic isolation system that includes an earthquake-sensitive relay and interrupts an electric circuit when an earthquake of a predetermined seismic intensity or higher occurs.

In order to prevent the occurrence of energized fires, distribution boards that install a seismic device (seismic relay) on the distribution board and shut off the main breaker when an earthquake of a certain seismic intensity or more occurs are spreading. For example, in Patent Document 1, a seismic relay equipped with a leakage output unit is installed that generates a pseudo-leakage after a certain period of time after receiving an earthquake in the distribution board to shut off the main breaker, that is, to implement a delay break. Then, the entire electric circuit was interrupted after a certain time.
On the other hand, there is a unit provided on the wall surface with a blocking function for blocking the electric circuit (see, for example, Patent Document 2).

JP2015-173522A JP 2006-351207 A

The above distribution board equipped with a seismic relay has a signal output unit that immediately outputs a signal when an earthquake is detected, in addition to a leakage output unit that generates a pseudo-leakage with a delay. Only certain branch breakers could be shut off immediately.
Further, by using this signal, it has become possible to perform the shut-off operation of the outlet unit having the shut-off function as disclosed in Patent Document 2.
However, when performing an operation test of a device having a function of performing an interruption operation by an external signal, it is troublesome to check the operation by operating a test button provided individually.

  Therefore, in view of such problems, the present invention makes it possible to test a breaking function of a branch breaker that is cut off by an earthquake detection signal of the seismic relay by operating the seismic relay, and further, detect an earthquake of the seismic relay. The purpose of this system is to provide a seismic isolation system that can be tested by operating the seismic relay for the outlet unit that operates with a signal.

In order to solve the above-mentioned problem, the invention of claim 1 is directed to a main circuit breaker for interrupting a main electric circuit connected to a commercial power source, and a plurality of electric circuits for interrupting a branch electric circuit branched from the secondary side of the main circuit breaker. The seismic relay system includes a branch breaker and a seismic relay that senses the occurrence of an earthquake. In addition to the delayed cutoff output unit that performs delayed cutoff, a signal output unit that immediately outputs an earthquake detection signal when an earthquake of a predetermined seismic intensity or higher is detected, and an earthquake detection signal is output from the signal output unit as a test signal While having a test operation part, a part of branch breaker is a breaker with an external cutoff function which receives the earthquake detection signal and performs a cutoff operation.
According to this configuration, since the breaker with the external shut-off function performs a shut-off operation by operating the test operation unit, the operation test can be performed without directly performing the test operation of the breaker with the external shut-off function, and a plurality of breakers with the external shut-off function are provided. But the test is a single operation.

According to a second aspect of the present invention, in the configuration according to the first aspect, a cutoff function including a cutoff mechanism that shuts off the outlet from the power source and a cutoff control unit that controls the cutoff of the cutoff mechanism in a part of the branch circuit An attached outlet unit is connected, and the shut-off control unit receives the earthquake detection signal and shuts off the shut-off mechanism.
According to this configuration, the outlet unit with a blocking function performs a blocking operation by the operation of the test operation unit. Therefore, the operation test can be performed without directly performing the test operation on the outlet unit with the interruption function, and even if a plurality of outlet units with the interruption function are provided, the test can be performed only once.

According to a third aspect of the present invention, in the configuration according to the second aspect, the outlet unit with a blocking function includes a tracking detection unit that detects a tracking phenomenon of the outlet, and the blocking control unit is configured to block a blocking mechanism when the tracking phenomenon is detected. This is characterized in that the operation is interrupted.
According to this configuration, since the outlet unit with a blocking function performs a blocking operation even when tracking occurs in addition to the occurrence of an earthquake, it is possible to reliably prevent the occurrence of a fire due to an electric circuit abnormality.

According to the present invention, since the breaker with the external shut-off function performs a shut-off operation by the operation of the test operation unit, the operation test can be performed without directly operating the breaker with the external shut-off function, and a plurality of breakers with the external shut-off function are provided. But the test is a single operation.
In addition, if an outlet unit with a shut-off function is provided, the outlet unit with a shut-off function can also be shut off by operating the test operation unit. Even if multiple outlet units are provided, the test can be performed only once.

It is a system configuration figure showing an example of a seismic isolation system concerning the present invention. It is a block diagram of a seismic relay. It is a block diagram of a communication measurement unit. It is a block diagram of a seismic communication unit. It is connection explanatory drawing of an outlet socket control unit. It is a block diagram of an outlet unit with a blocking function.

  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 block diagram showing an example of a seismic isolation system according to the present invention. 1 is a commercial power source comprising a single-phase three-wire circuit (voltage phases X and Y and neutral phase N) drawn into a dwelling unit. Is a primary breaker connected to the primary side, 2 is a branch breaker for interrupting individual branch circuits branched from the main circuit M formed on the secondary side of the main breaker 1, and 3 is an earthquake having a predetermined seismic intensity or more. Is a seismic relay that outputs an earthquake detection signal and generates a pseudo-leakage in the main circuit M, 4 is a communication measurement unit that transmits information on the power used in the dwelling unit to the external HEMS device 11, and 5 is a seismic relay 3 An earthquake-sensing communication unit that receives a seismic detection signal output from a circuit and operates to shut off a specific branch breaker 2, and 6 is an outlet control unit that operates a plurality of outlet units 12 with a blocking function provided at the end of the branch circuit. A.

A branch breaker 2 is installed for each branch circuit, and is not subjected to control by an external signal (a group of first breakers 2a), and a breaker group (a second breaker 2b) that performs a cutoff operation under the control of the seismic communication unit 5. Group) and two groups.
For this reason, the first breaker 2a is a branch breaker having a simple structure as compared with the prior art, but the second breaker 2b is an external device having an external control terminal (not shown) for inputting a control signal of the seismic communication unit 5. Breaker with shut-off function.

  The seismic relay 3, the communication measurement unit 4, the seismic communication unit 5, and the outlet control unit 6 are assembled inside the distribution board B. The seismic relay 3, the communication measuring unit 4, and the seismic communication unit 5 are connected to the main breaker 9 constituting the main electric circuit M arranged on the secondary side of the main breaker 1, and the first breaker 2 a and the second breaker 2. However, since the outlet control unit 6 is composed of only contacts and does not require a power source, it may be arranged outside the distribution board B.

  The seismic relay 3 is connected to one voltage phase Y on the primary side of the main breaker 1 via the transmission line L1, and is connected to the seismic communication unit 5 via the transmission line L3. The seismic communication unit 5 is connected to the communication measurement unit 4 via the transmission line L4, and is connected to the outlet control unit 6 via the transmission line L6.

FIG. 2 shows a block diagram of the seismic relay 3. As shown in FIG. 2, the seismic relay 3 causes an acceleration sensor 31, a seismic intensity setting unit 33 for setting a seismic intensity to be determined as an occurrence of an earthquake, and generates a pseudo-leakage after a certain time from the occurrence of an earthquake, thereby causing the main breaker 1 to perform a delay cutoff operation. Cut-off time setting unit 34 for setting time, pseudo-leakage output unit 35 for generating pseudo-leakage, buzzer 36a for issuing alarm sound, LED 36b for notifying light emission, test / reset button 37 for performing test / reset of earthquake detection operation, If it is determined that an earthquake has occurred, the seismic intensity of the earthquake is determined from the output of the external communication unit 38 and acceleration sensor 31 that outputs an earthquake detection signal. If it is determined that the seismic intensity is greater than the set seismic intensity, it is determined that an earthquake has occurred and various control signals are sent. In addition to outputting, an MCU (Micro Controller Unit) 39 for controlling the entire seismic relay 3 is provided.
The MCU 39 is a memory 39a such as a ROM or a RAM, and an integrated circuit incorporating peripheral functions such as I / O. The memory 39a has a delay cutoff time for generating, for example, a set seismic intensity threshold or a pseudo-leakage. Etc. are memorized.

  The pseudo-leakage output unit 35 is connected to one voltage phase Y of the main circuit M on the primary side of the main breaker 1 by the transmission line L1. Further, an external communication unit 38 is connected to the seismic communication unit 5 via the transmission line L3. The external communication unit 38 includes an interface circuit that transmits a predetermined signal from the outside to the MCU 39 in addition to the signal output to the outside.

  In the seismic relay 3, a seismic intensity (predetermined seismic intensity) is set by the seismic intensity setting unit 33 to output an earthquake detection signal. The interruption time setting unit 34 sets a time for delay interruption by generating a pseudo electric leakage. For example, when the MCU 39 determines that an earthquake has occurred, an earthquake detection signal is immediately output from the external communication unit 38, but for example, the pseudo-leakage output unit 35 outputs a certain time (for example, 3 minutes) after outputting the earthquake detection signal. After elapses, a pseudo-leakage signal for generating a pseudo-leakage in the main electric circuit M is output. When the earthquake detection signal is output, the buzzer 36a sounds and the LED 36b blinks.

  In addition to controlling the seismic relay 3 as a whole, the MCU 39 communicates with the external HEMS device 11 via the seismic communication unit 5 and the communication measurement unit 4, and detects seismic intensity information in addition to transmitting an earthquake detection signal. Is transmitted to the HEMS device 11. On the other hand, it is possible to set the seismic intensity as a threshold for outputting an earthquake detection signal from the HEMS device 11 and the time for delay interruption by generating a pseudo electric leakage.

  Here, the pseudo-leakage signal output from the pseudo-leakage output unit 35 of the seismic relay 3 will be described. By connecting the pseudo earth leakage output unit 35 to the primary side of the main breaker 1 via the transmission line L1, an electric circuit that does not pass through the main breaker 1 between the secondary side electric circuit and the primary side electric circuit of the main breaker 1 (simulated When the seismic relay 3 is turned on and energized, the main circuit breaker 1 determines that a leakage has occurred and performs a cut-off operation. This on operation is referred to as outputting a pseudo-leakage signal.

FIG. 3 shows a block diagram of the communication measurement unit 4. As shown in FIG. 3, the communication measurement unit 4 is installed in the main current sensor 13 for detecting the current flowing through the main breaker 1 and the branch current sensor 14 for detecting individual branch currents installed in the individual branch breakers 2. An input current information input unit 41, an internal communication IF 42 to which the seismic communication unit 5 is connected, an external communication IF 43 that communicates with the HEMS device 11 through, for example, a LAN, a communication measurement unit CPU 44 that controls the communication measurement unit 4 as a whole, etc. It has.
In addition, 21 is an extended measurement unit that measures the generated power and outputs data to a distributed power generation device such as solar power generation (not shown), and 22 is a pulse measurement unit that calculates the amount of water / gas used. The measurement unit is also connected to the internal communication IF 42, and the generated power information and water / gas usage data received by the communication measurement unit CPU 44 are transmitted to the HEMS device 11.

  In this way, the communication measurement unit 4 transmits power usage information, generated power information, and water / gas usage information to the connected external HEMS device 11. The communication measurement unit CPU 44 manages the communication between the HEMS device 11 and the seismic relay 3, and senses such as earthquake detection signals and seismic intensity information output from the seismic relay 3 received via the seismic communication unit 5. When the seismic information is transmitted to the HEMS device 11, the seismic communication unit 5 is received from the HEMS device 11 when a setting signal such as a predetermined seismic intensity setting for determining the occurrence of the earthquake of the seismic relay 3 or a delay operation time setting is received. Is transmitted to the seismic relay 3 via.

  FIG. 4 shows a block diagram of the seismic communication unit 5. As shown in FIG. 4, the seismic communication unit 5 includes a first communication IF 51 that communicates with the seismic relay 3 via the transmission line L3, a second communication IF 52 that communicates with the communication measurement unit 4 via the transmission line L4, In response to the detection signal, the first output unit 53 for immediately shutting off a specific branch breaker (group of second breakers 2b) 2, the second output unit 54 for shutting off the outlet unit 12 with the shut-off function, and the state An LED 55 for display, a seismic communication unit CPU 56 for controlling the seismic communication unit 5 and the like are provided.

The first output unit 53 is connected to the second breaker 2b via the transmission line L5, and the second output unit 54 is connected to the outlet control unit 6 via the transmission line L6. A plurality of outlet units 12 with a blocking function are connected via the outlet control unit 6 and their blocking operation is controlled.
The control signal output from the seismic communication unit 5 to the second breaker 2b is an a-contact signal, and the second breaker 2b receives the a-contact signal and performs a blocking operation.

  The seismic communication unit CPU 56 manages communication between the HEMS device 11 and the seismic relay 3, and performs a predetermined seismic intensity setting of the seismic relay 3 received from the HEMS device 11 via the communication measurement unit 4. A setting signal is transmitted to the seismic relay 3. At this time, the seismic relay 3 is converted into a signal that can be recognized and transmitted.

FIG. 5 is a connection explanatory diagram of the outlet control unit 6 and shows a specific connection between the seismic communication unit 5 and the individual outlet units 12 with a blocking function. The outlet control unit 6 has a function as a relay terminal block, and is connected to the outlet unit 12 with a cutoff function to be controlled by a transmission line L7.
Specifically, a b-contact signal is transmitted as a cutoff signal from the seismic communication unit 5 to the outlet control unit 6, and each output section of the outlet control unit 6 is connected in series. The b-contact signal is relayed and output. Is done.

FIG. 6 shows a block diagram of the shutoff function equipped set unit 12. As shown in FIG. 6, the outlet unit 12 with a cutoff function includes a cutoff mechanism 122 that cuts off a branch electric circuit leading to an outlet 121 to which a plug (not shown) extending from a load is connected. The function of shutting off the output of the outlet 121 by the operation of the seismic communication unit 5) is provided.
Specifically, the outlet unit with a cutoff function 12 includes a power supply trip circuit 123 that causes the cutoff mechanism 122 to shut down (trip) in addition to the outlet 121 and the cutoff mechanism 122, and a tracking detection unit 124 that detects a tracking phenomenon at the outlet 121. An external input unit 125 for inputting a trip operation signal from the outside, a test switch 126 for performing a test operation, a stop switch 127 for returning the operation state to an initial state, an outlet unit CPU 128 for controlling the outlet unit 12 with a shut-off function, a power supply circuit 129, etc. I have.

  The external input unit 125 is configured as a b-contact input unit, and upon receiving the b-contact signal output from the outlet control unit 6, the outlet unit CPU 128 performs a cutoff control. Specifically, when a signal is input from the external input unit 125, the outlet unit CPU 128 activates the power trip circuit 123 to trip the shut-off mechanism 122 and shut off the output of the outlet 121. When the tracking detection unit 124 detects the tracking phenomenon, the blocking mechanism 122 is similarly tripped.

  The seismic isolation system configured as described above operates as follows in response to the occurrence of an earthquake. If an earthquake occurs in a state where commercial power is being supplied to the electrical equipment in the dwelling unit, the acceleration sensor 31 detects it and the MCU 39 determines the seismic intensity. When the determined seismic intensity is an earthquake equal to or greater than the seismic intensity set in advance by the seismic intensity setting unit 33 or the like as a threshold (for example, seismic intensity of 5 or less), the MCU 39 performs the following control.

First, an earthquake detection signal is immediately output from the external communication unit 38, the buzzer 36a rings, and the LED 36b blinks. Then, the output earthquake detection signal is transmitted to the seismic communication unit 5.
Thereafter, when a certain time (delay cut-off time) set in advance by the cut-off time setting unit 34 or the like has elapsed, the pseudo-fault leakage output unit 35 outputs a pseudo-fault. That is, the operation for generating a pseudo-leakage is started. As a result, the main breaker 1 is cut off, the main electric circuit M is cut off from the commercial power supply, and all branch electric circuits are cut off.

On the other hand, the seismic communication unit 5 that has received the earthquake detection signal outputs a blocking signal to the group of second breakers 2b connected to the first output unit 53 to perform a blocking operation. In addition, a cutoff signal is output from the second output unit 54 to the outlet unit 12 with a cutoff function via the outlet control unit 6. As a result, before the main breaker 1 performs the shut-off operation, all the outlet units 12 with the shut-off function connected to the group of second breakers 2b and the outlet control unit 6 perform the shut-off operation.
Furthermore, the seismic communication unit 5 transmits earthquake occurrence information to the communication measurement unit 4. The communication measurement unit 4 that has received the earthquake occurrence information transmits the information to the HEMS device 11.

When the test / reset button 37 of the seismic relay 3 is operated, the operation is as follows. When the test / reset button 37 is operated, an earthquake detection signal is output from the external communication unit 38 under the control of the MCU 39. When operated again, the MCU 39 determines that it has been reset and stops outputting signals.
When the earthquake detection signal is output, the second breaker 2b is cut off in response to the earthquake detection signal as in the case of the occurrence of the earthquake, and the outlet unit 12 with a cutoff function is also cut off.

As described above, since the second breaker 2b is shut off by the operation of the test / reset button 37, the operation test can be performed without directly performing the test operation of the second breaker 2b, and a plurality of second breakers 2b are provided. But the test is a single operation.
Further, since the outlet unit 12 with the shut-off function performs a shut-off operation by operating the test / reset button 37, the operation test can be performed without directly performing the test operation of the outlet unit 12 with the shut-off function, and a plurality of outlet units 12 with the shut-off function are provided. But testing is a single operation.
Furthermore, since the outlet unit 12 with a blocking function performs a blocking operation even when tracking occurs in addition to the occurrence of an earthquake, it is possible to reliably prevent the occurrence of a fire due to an abnormal electric circuit.
In addition, since the outlet unit 12 with a shut-off function shuts off immediately when an earthquake occurs, other electrical equipment connected to a common branch circuit is also turned off in conjunction with the electrical equipment that requires immediate shut-off operation. This can solve the problem and makes it convenient.
In addition, when the seismic relay 3 senses an earthquake and outputs an earthquake detection signal, the seismic communication unit 5 outputs a shut-off signal that shuts off the branch breaker 2, so that immediate shut-off can be performed in addition to delay shut-off. Electric heaters that can easily cause fire due to the occurrence of an earthquake can be shut off immediately. Moreover, since the HEMS apparatus 11 can set the seismic intensity determined as the occurrence of an earthquake and the time for delaying interruption, the seismic relay can be set with a simple operation.

In the above embodiment, the outlet unit 12 with the cutoff function receives the earthquake detection signal output from the seismic relay 3 via the seismic communication unit 5 and the outlet control unit 6 and performs a cutoff operation. The external input units 125 of the outlet unit 12 may be connected in series. In that case, one end can be directly connected to the seismic communication unit 5 without going through the outlet control unit 6.
The seismic relay 3 includes an external communication unit 38 that transmits / receives a signal, but may be a terminal that only outputs an earthquake detection signal.

  1 ... Main trunk breaker 2 .... Branch breaker 2b ... Second breaker (breaker with external shut-off function) 3 .... Seismic relay 4 .... Communication measuring unit 5 .... Seismic communication unit 6 · · Outlet control unit, 12 · · Outlet unit with shutoff function, 33 · · Seismic intensity setting unit, 34 · · Cutoff time setting unit, 35 · · Pseudo-leakage output unit (delay cutout output unit), 37 · · Test / reset Button (test operation part), 38..External communication part (signal output part), 39..MCU, 39a..Memory, 44..Communication measurement unit CPU, 121..Outlet, 122..Blocking mechanism, 123 .. -Power trip circuit, 124-Tracking detection unit, 125-External input unit, 128-Outlet unit CPU (cut-off control unit), B-Distribution board, M-Main circuit

Claims (3)

A main circuit breaker for interrupting a main electric circuit connected to a commercial power source, a plurality of branch circuit breakers for interrupting a branch electric circuit branched from the secondary side of the main circuit breaker, and an earthquake-sensitive relay for detecting the occurrence of an earthquake When the seismic relay detects an earthquake of a predetermined seismic intensity or higher, the seismic shut-off system delays the main breaker after that,
The seismic relay includes a signal output unit that immediately outputs an earthquake detection signal when an earthquake of a predetermined seismic intensity or higher is detected in addition to a delay cutoff output unit that performs the delay cutoff, and a test signal from the signal output unit as a test signal. While having a test operation unit for outputting the earthquake detection signal,
Some of the branch breakers are breakers with an external blocking function that perform a blocking operation in response to the earthquake detection signal. A part of the branch circuit is connected to an outlet unit with a cutoff function including a cutoff mechanism that shuts off the outlet from the power source, and a cutoff control unit that controls the cutoff of the cutoff mechanism.
The seismic isolation system according to claim 1, wherein the cutoff control unit receives the earthquake detection signal and causes the cutoff mechanism to perform a cutoff operation. The outlet unit with a blocking function has a tracking detection unit for detecting a tracking phenomenon of the outlet,
The seismic isolation system according to claim 2, wherein when the tracking phenomenon is detected, the cutoff control unit performs the cutoff operation of the cutoff mechanism.

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