JP6769841B2 - Seismic isolation system - Google Patents

Description

The present invention relates to a seismic shutoff system equipped with a seismic sensitive relay and shuts off 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 are equipped with seismic sensors (seismic relays) to shut off the main breaker when an earthquake with a certain seismic intensity or higher occurs are becoming widespread. For example, in Patent Document 1, a seismic relay equipped with an earth leakage output unit that interrupts the main breaker by generating a pseudo earth leakage after a certain period of time after an earthquake occurs in the distribution board is installed. Then, after a certain period of time, the entire electric circuit was cut off.
On the other hand, some conset units installed on the wall surface have a blocking function for blocking the electric circuit (see, for example, Patent Document 2).

JP 2015-173522 Japanese Unexamined Patent Publication No. 2006-351207

The distribution board equipped with a seismic relay is equipped with a signal output unit that outputs a signal immediately when an earthquake occurs, in addition to an earth leakage output unit that delays and generates a pseudo-leakage. It was possible to immediately shut off only a specific branch breaker.
Further, by using this signal, it has become possible to shut off an outlet unit having a blocking function as disclosed in Patent Document 2.
However, when performing an operation test of a device having a function of shutting off by an external signal, it is troublesome to operate the test buttons provided individually to check the operation.

Therefore, in view of such a problem, the present invention makes it possible to test the blocking function of the branch breaker that shuts off by the seismic detection signal of the seismic relay by operating the seismic relay, and further, the seism detection of the seismic relay. The purpose is to provide a quake detector system that can be tested by operating a quake detector relay even for an outlet unit that shuts off by a signal.

In order to solve the above problems, the invention of claim 1 is a plurality of main breakers for blocking the main electric circuit connected to a commercial power source and a plurality of branch electric circuits for blocking the branch electric circuit branched from the secondary side of the main breaker. It is a seismic blocking system that is equipped with a branch breaker and a seismic relay that detects the occurrence of an earthquake, and if the seismic relay detects an earthquake with a predetermined seismic intensity or higher, the main breaker is then delayed and shut off. In addition to the delay cutoff output unit that implements delay cutoff, the signal output unit that outputs an earthquake detection signal immediately when an earthquake with a predetermined seismic intensity or higher is detected, and the signal output unit that outputs an earthquake detection signal as a test signal. While having a test operation unit, some branch electric circuits are connected to an outlet unit with a blocking function having a blocking mechanism that shuts off the outlet from the power supply and a blocking control unit that controls the blocking of the blocking mechanism. The cutoff control unit is characterized in that the cutoff control unit receives an earthquake detection signal to shut off the cutoff mechanism, and some of the branch breakers are breakers with an external cutoff function that receive the earthquake detection signal and perform a cutoff operation.
According to this configuration, since the breaker with the external cutoff function is cut off by the operation of the test operation unit, the operation can be tested without directly testing the breaker with the external cutoff function, and a plurality of breakers with the external cutoff function are provided. However, the test only needs to be performed once.

Further, the outlet unit with a shutoff function is shut off by the operation of the test operation unit. Therefore, the operation can be tested without directly testing the outlet unit with a shutoff function, and even if a plurality of outlet units with a cutoff function are provided, the test can be performed only once.

According to the second aspect of the present invention, in the configuration according to the first aspect , the outlet unit with a blocking function has a tracking detection unit that detects a tracking phenomenon of the outlet, and the blocking control unit has a blocking mechanism when the tracking phenomenon is detected. It is characterized by shutting off.
According to this configuration, the outlet unit with a shutoff function shuts off even when tracking occurs in addition to the occurrence of an earthquake, so that 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 cutoff function is cut off by the operation of the test operation unit, the operation can be tested without directly performing the test operation on the breaker with the external cutoff function, and a plurality of breakers with the external cutoff function are provided. However, the test requires only one operation.
In addition, if the outlet unit with a shutoff function is provided, the outlet unit with a shutoff function can also be shut off by operating the test operation unit, so the operation can be tested without directly testing the outlet unit with a shutoff function. Even if you have multiple outlet units, you only need to perform the test once.

It is a system block diagram which shows an example of the seismic isolation system which concerns on this 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 a connection explanatory drawing of the outlet control unit. It is a block diagram of the outlet unit with a shutoff function.

Hereinafter, embodiments embodying the present invention will be described 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 FIG. 1 is a commercial power supply composed of a single-phase three-wire electric circuit (voltage phases X and Y and neutral phase N) drawn into a dwelling unit. Is a main breaker connected to the primary side, 2 is a branch breaker for cutting off individual branch electric circuits branched from the main electric circuit M formed on the secondary side of the main breaker 1, and 3 is an earthquake with a predetermined seismic intensity or higher. A seismic relay that outputs an earthquake detection signal and generates a pseudo-leakage in the main electric circuit M when the above is detected, 4 is a communication measurement unit that transmits power usage information in the dwelling unit to an external HEMS device 11, and 5 is a seismic relay 3. A seismic communication unit that shuts off a specific branch breaker 2 in response to an earthquake detection signal output from, and 6 is an outlet control unit that shuts off a plurality of outlet units 12 with a shutoff function provided at the end of a branch circuit. is there.

The branch breaker 2 is installed for each branch electric circuit, and is a breaker group (a group of the first breaker 2a) that is not controlled by an external signal and a breaker group (a second breaker 2b) that shuts off under the control of the seismic communication unit 5. It is composed of two groups (group of) and.
Therefore, the first breaker 2a is a conventional branch breaker having a simple structure, but the second breaker 2b is an external device provided with an external control terminal (not shown) for inputting a control signal of the seismic communication unit 5. It is a breaker with a blocking 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 measurement unit 4, and the seismic communication unit 5 are connected to the main bar 9 constituting the main electric circuit M arranged on the secondary side of the main breaker 1 with the first breaker 2a and the second. The power is supplied by being connected together with the breaker 2b of the above, but since the outlet control unit 6 is composed of only contacts and does not require a power supply, it may be arranged outside the distribution board B.

The seismic relay 3 is connected to one of the voltage phases 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. Further, 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 has an acceleration sensor 31, a seismic intensity setting unit 33 for setting a seismic intensity to be determined to be an earthquake, and a pseudo-leakage generated after a certain period of time from the occurrence of an earthquake to delay-block the main breaker 1. A cutoff time setting unit 34 for setting the time, a pseudo electric leakage output unit 35 for generating a pseudo electric leakage, a buzzer 36a for issuing an alarm sound, an LED 36b for notifying light emission, a test / reset button 37 for testing / resetting an 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 that outputs the earthquake detection signal and the acceleration sensor 31, and if it is determined that the seismic intensity is higher than the set seismic intensity, it is determined that an earthquake has occurred and various control signals are output. It is equipped with an MCU (Micro Controller Unit) 39 or the like that outputs and controls the entire seismic relay 3.
The MCU 39 is an integrated circuit having built-in peripheral functions such as memory 39a such as ROM and RAM, and I / O-related functions. The memory 39a has, for example, a set seismic intensity threshold value and a delay cutoff time for generating a pseudo electric leakage. Etc. are memorized.

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

In the seismic relay 3, the seismic intensity (predetermined seismic intensity) for outputting the seismic detection signal is set by the seismic intensity setting unit 33, and for example, seismic intensity 5 lower, 6 or the like is set. In the cutoff time setting unit 34, a time for causing a pseudo electric leakage to cause a delayed cutoff is set. For example, when the MCU 39 determines that an earthquake has occurred, the external communication unit 38 immediately outputs an earthquake detection signal, but the pseudo-leakage output unit 35 outputs, for example, an earthquake detection signal for a certain period of time (for example, 3 minutes). After that, a pseudo leakage signal that causes a pseudo leakage is output to the main electric circuit M. Then, when the earthquake detection signal is output, the buzzer 36a sounds and the LED 36b blinks.

In addition to controlling the entire seismic relay 3, the MCU 39 communicates with the external HEMS device 11 via the seismic communication unit 5 and the communication measurement unit 4, and transmits the seismic intensity information detected in addition to the transmission of the seismic detection signal. Is transmitted to the HEMS device 11. On the other hand, it is possible to set the seismic intensity as a threshold value for outputting the earthquake detection signal from the HEMS device 11 and to set the time for causing a pseudo electric leakage and interrupting the delay.

Here, the pseudo-leakage signal output by 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 (pseudo) 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. An earth leakage circuit) is formed, and when the seismic relay 3 is turned on to energize this pseudo earth leakage circuit, the main breaker 1 determines that an earth leakage has occurred and shuts off. This on operation is called outputting a pseudo earth leakage signal.

FIG. 3 shows a block diagram of the communication measurement unit 4. As shown in FIG. 3, the communication measurement unit 4 has current information of the main current sensor 13 that detects the current flowing through the main breaker 1 and the branch current sensor 14 that is installed in each branch breaker 2 and detects each branch current. The input current information input unit 41, the internal communication IF42 to which the seismic communication unit 5 is connected, the external communication IF43 that communicates with the HEMS device 11 by connecting to a LAN, for example, the communication measurement unit CPU44 that controls the entire communication measurement unit 4, etc. It has.
Reference numeral 21 denotes an extended measurement unit that measures the generated power of distributed power generation equipment such as photovoltaic power generation and outputs data, 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 the power consumption information, the generated power information, and the water / gas usage amount information to the connected external HEMS device 11. Then, the communication measurement unit CPU 44 manages the communication between the HEMS device 11 and the seismic intensity relay 3, and feels the seismic detection signal, the seismic intensity information, and the like output by the seismic relay 3 received via the seismic communication unit 5. While transmitting the seismic information to the HEMS device 11, when the HEMS device 11 receives a setting signal such as a predetermined seismic intensity setting for determining the occurrence of an earthquake in the seismic detection relay 3 or a delay operation time setting, the seismic communication unit 5 It is transmitted to the seismic detection relay 3 via.

FIG. 4 shows a block diagram of the seismic communication unit 5. As shown in FIG. 4, the seismic detection communication unit 5 has a first communication IF 51 that communicates with the seismic detection 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, and an earthquake. The first output unit 53 for immediately shutting off the specific branch breaker (group of the second breaker 2b) 2 in response to the detection signal, the second output unit 54 for shutting off the outlet unit 12 with a shutoff function, and the state. It includes an LED 55 for displaying, a seismic communication unit CPU 56 for controlling the seismic communication unit 5, and the like.

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 shutoff function are connected via the outlet control unit 6, and their shutoff operations are 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 shuts off.

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

FIG. 5 is an explanatory diagram of the connection of the outlet control unit 6, showing 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 blocking function to be controlled by a transmission line L7, respectively.
A b-contact signal is specifically transmitted from the seismic communication unit 5 to the outlet control unit 6 as a cutoff signal, and each output unit of the outlet control unit 6 is connected in series, and this b-contact signal is relayed and output. Will be done.

FIG. 6 shows a block diagram of the conset unit 12 with a blocking function. As shown in FIG. 6, the outlet unit 12 with a cutoff function includes a cutoff mechanism 122 that cuts off a branch electric path leading to an outlet 121 to which a plug (not shown) extending from the load is connected, and is operated externally (here, here). It has a function of shutting off the output of the outlet 121 by the operation of the seismic communication unit 5).
Specifically, the outlet unit 12 with a shutoff function includes a power trip circuit 123 that cuts off (trips) the shutoff mechanism 122 in addition to the outlet 121 and the shutoff mechanism 122, and a tracking detection unit 124 that detects a tracking phenomenon at the outlet 121. , External input unit 125 that inputs trip operation signal from the outside, test switch 126 that performs test operation, stop switch 127 that returns the operating state to the initial state, outlet unit CPU 128 that controls the outlet unit 12 with shutoff function, power supply circuit 129, etc. I have.

Then, the external input unit 125 is configured as a b-contact input unit, and the outlet unit CPU 128 performs cutoff control in response to the b-contact signal output by the outlet control unit 6. 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 cutoff mechanism 122 to cut off the output of the outlet 121. Further, 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 while the electrical equipment in the dwelling unit is energized with commercial power, the acceleration sensor 31 detects it and the MCU 39 determines the seismic intensity. When the determined seismic intensity is an earthquake having a seismic intensity or higher (for example, a seismic intensity of 5 lower or higher) set in advance by the seismic intensity setting unit 33 or the like as a threshold value, the MCU 39 performs the following control.

First, an earthquake detection signal is immediately output from the external communication unit 38, the buzzer 36a sounds, and the LED 36b blinks. Then, the output seismic detection signal is transmitted to the seismic communication unit 5.
After that, when a certain time (delayed earth leakage time) set in advance by the earth leakage setting unit 34 or the like elapses, the earth leakage output unit 35 outputs the earth leakage. That is, the operation of generating a pseudo electric 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 the branch electric circuits are cut off.

On the other hand, the seismic communication unit 5 that has received the earthquake detection signal outputs a cutoff signal to the group of the second breakers 2b connected to the first output unit 53 to perform a cutoff operation. Further, 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 shuts off, all the outlet units 12 with a shutoff function connected to the group of the second breakers 2b and the outlet control unit 6 shut off.
Further, 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 the operation is performed again, the MCU 39 determines that it has been reset and stops the signal output.
By outputting the earthquake detection signal, the second breaker 2b receives the earthquake detection signal and shuts off, and the outlet unit 12 with a shutoff function also shuts off, as in the case of an earthquake.

In this way, since the second breaker 2b is shut off by the operation of the test / reset button 37, the operation can be tested without directly testing the second breaker 2b, and a plurality of the second breakers 2b are provided. However, the test only needs to be performed once.
Further, since the outlet unit 12 with a shutoff function is shut off by operating the test / reset button 37, the operation can be tested without directly testing the outlet unit 12 with a shutoff function, and a plurality of outlet units 12 with a shutoff function are provided. But the test only needs to be done once.
Further, since the outlet unit 12 with a shutoff function shuts off 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.
In addition, since the outlet unit 12 with a shutoff function shuts off immediately when an earthquake occurs, other electrical devices connected to the common branch electric circuit are also turned off in order to turn off the electrical devices that require immediate shutoff operation. It is convenient because it can solve the problem of
Further, when the seismic relay 3 detects an earthquake and outputs an earthquake detection signal, the seismic communication unit 5 outputs a shutoff signal for shutting off the branch breaker 2, so that immediate shutoff can be performed in addition to delay cutoff. It is possible to immediately shut off electric stoves, etc., which are prone to cause fires due to the occurrence of an earthquake. In addition, since the HEMS device 11 can set the seismic intensity for determining that an earthquake has occurred and the time for delay interruption, the seismic relay can be set with a simple operation.

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

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

Claims (2)

A main breaker for cutting off the main electric circuit connected to a commercial power source, a plurality of branch breakers for cutting off the branch electric circuit branched from the secondary side of the main breaker, and a seismic relay for detecting the occurrence of an earthquake. This is a seismic shutoff system that delays and shuts off the main breaker when the seismic relay detects an earthquake with a predetermined seismic intensity or higher.
In addition to the delay cutoff output unit that executes the delay cutoff, the seismic relay has a signal output unit that immediately outputs an earthquake detection signal when an earthquake having a predetermined seismic intensity or higher is detected, and a signal output unit as a test signal. While having a test operation unit that outputs the earthquake detection signal,
A shut-off function-equipped outlet unit having a shut-off mechanism for shutting off the outlet from the power supply and a cut-off control unit for controlling the cut-off of the cut-off mechanism is connected to some of the branch electric circuits. In response to the earthquake detection signal, the shutoff mechanism is shut off and
A seismic cutoff system, wherein a part of the branch breakers is a breaker with an external cutoff function that shuts off in response to the earthquake detection signal. The outlet unit with a blocking function has a tracking detection unit that detects a tracking phenomenon of the outlet.
The cut-off control unit, seismic isolation system of claim 1, wherein the tracking phenomenon characterized thereby interrupting operation of the blocking mechanism if it is detected.

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