JP4562160B2 - Seismic device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a seismic sensing device that shuts off a breaker in order to prevent an electric fire when an earthquake occurs.
[0002]
[Prior art]
Conventional seismic sensing devices have different circuit configurations depending on the type of breaker to be shut off. As shown in FIG. 6, the seismic sensing device 32 for cutting off the dedicated earth leakage breaker 31 sends an alarm signal to the two input terminals 33 and 34 for connection to the L phase and the N phase of the electric circuit, and the dedicated earth leakage breaker 31. Two output terminals 35 and 36 for output are provided, a relay contact 37 is inserted between the output terminals 35 and 36, a relay coil 38 is connected to the control unit 39, and the control unit 39 detects an earthquake. The earthquake detection unit 40 is connected. The output terminals 35 and 36 are connected to dedicated terminals 41 and 42 of the dedicated earth leakage breaker 31. When the occurrence of an earthquake is detected by the earthquake detection unit 40, the control unit 39 excites the relay coil 38 to close the relay contact 37, and the dedicated earth leakage breaker 31 is cut off by the non-voltage a contact output.
[0003]
Further, as shown in FIG. 7, the seismic sensing device 52 for blocking the dedicated branch breaker 51 has two input terminals 53 and 54 for connecting to the L phase and the N phase of the electric circuit, and an alarm to the dedicated branch breaker 51. Two output terminals 55 and 56 for outputting signals are provided. A relay contact 57 and a power source 58 are inserted between the output terminals 55 and 56, and the relay coil 59 is connected to the control unit 60. An earthquake detection unit 61 for detecting an earthquake is connected. The output terminals 55 and 56 are connected to the dedicated terminals 62 and 63 of the dedicated branch breaker 51. When the occurrence of an earthquake is detected by the earthquake detector 61, the controller 60 excites the relay coil 59 to close the relay contact 57, and the dedicated branch breaker 51 is shut off by the voltage output.
[0004]
Further, as shown in FIG. 8, a seismic sensing device 72 for interrupting a normal earth leakage breaker 71 includes two input terminals 73 and 74 for connection to an L phase and an N phase of an electric circuit, and an ordinary earth leakage breaker 71. Are provided with two output terminals 75 and 76 for outputting an alarm signal, a relay contact 77 and a resistor 78 are inserted between the output terminals 75 and 76, and the relay coil 79 is connected to the control unit 80. An earthquake detection unit 81 for detecting an earthquake is connected to 80. The output terminals 75 and 76 are connected to the primary side terminal 82 of one phase of the earth leakage breaker 71 and the secondary side terminal 83 of the other phase. When the occurrence of an earthquake is detected by the earthquake detector 81, the controller 80 excites the relay coil 79 to close the relay contact 77, and the earth leakage breaker 71 is interrupted by the pseudo earth leakage output.
[0005]
[Problems to be solved by the invention]
Although the seismic device that shuts off the dedicated breaker can form the device in a small size, it has the disadvantage that it cannot be used with existing facilities because it cannot block breakers other than the dedicated breaker.
[0006]
In addition, a seismic sensing device that interrupts a normal earth leakage breaker must incorporate a large resistance in the device in order to allow a sufficient pseudo-leakage current to flow through the breaker. Therefore, the apparatus becomes large, and the existing distribution board has a limited installation space, so it may not be installed. Moreover, there was a fault that it cannot be used for a dedicated breaker.
[0007]
[Means for Solving the Problems]
In view of the problems of the conventional seismic sensing device, the object of the present invention is to enable a plurality of alarm outputs such as no-voltage a contact output, voltage output, and pseudo-leakage output, and all existing distribution boards A seismic device that can be installed in a seismic device that detects the occurrence of an earthquake and shuts off the breaker, has two input terminals and three output terminals. One of the terminals is electrically connected to one of the three output terminals, and an alarm contact is provided between the remaining two output terminals.
[0008]
In the seismic device, the output terminal connected to the input terminal and one output terminal connected to the alarm contact are connected by a short-circuit line or a switch.
[0009]
Further, in the seismic device, an external resistor is connected between the output terminal connected to the input terminal and one output terminal connected to the alarm contact.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
According to the seismic device of claim 1, in the seismic device that detects the occurrence of an earthquake and shuts off the breaker, the seismic device that detects the occurrence of the earthquake and shuts off the breaker, the two input terminals and Three output terminals are provided, and one of the two input terminals is electrically connected to one of the three output terminals, and an alarm is provided between the remaining two output terminals. By providing the contacts, a plurality of alarm outputs can be made and installed on all existing or new distribution boards.
[0011]
According to the seismic sensing device of claim 2, the alarm is set to a voltage by connecting the output terminal connected to the input terminal and one output terminal connected to the alarm contact by a short-circuit line or a switch. Can be output.
[0012]
According to the seismic sensing device of claim 3, the alarm is detected as a pseudo-leakage by connecting an external resistor between the output terminal connected to the input terminal and one output terminal connected to the alarm contact. The output can be reduced, and the device can be miniaturized to provide an external resistor.
[0013]
【Example】
An embodiment of the seismic sensing device according to the present invention will be described with reference to the accompanying drawings of FIGS.
[0014]
As shown in FIG. 1, the seismic sensing device 1 includes two input terminals 2 and 3 for connection to the L phase and N phase of the electric circuit, and three output terminals 4, 5 and 5 for outputting an alarm signal to the breaker. 6, one of the two input terminals 2, 3, for example, the L-phase input terminal 2, and one of the three output terminals 4, 5, 6, for example, the first 1 output terminal 4 is electrically connected.
[0015]
Further, an earthquake detection unit 7 for detecting an earthquake, a control unit 8 that determines whether or not an earthquake is detected based on the output of the earthquake detection unit 7, and a relay coil 9 that is driven by the output of the control unit 8 The relay contact 10 is provided between the remaining output terminals, that is, the second output terminal 5 and the third output terminal 6.
[0016]
As shown in FIG. 2, when the seismic device 1 is used for the dedicated earth leakage breaker 11, the input terminals 2 and 3 of the seismic device 1 are connected to the secondary side terminals 12 and 13 of the dedicated earth leakage breaker 11, and the first The output terminal 4 is left unconnected, and the second output terminal 5 and the third output terminal 6 are connected to the dedicated terminals 14 and 15 of the dedicated leakage breaker 11, respectively.
[0017]
When the occurrence of an earthquake is detected by the earthquake detection unit 7, the control unit 8 excites the relay coil 9 to close the relay contact 10, and the dedicated earth leakage breaker 11 is cut off by the non-voltage a contact output.
[0018]
As shown in FIG. 3, when the seismic device 1 is used for the dedicated branch breaker 16, the input terminals 2 and 3 of the seismic device 1 are connected to the secondary side terminals of the main breaker (not shown), and the first The output terminal 4 and the second output terminal 5 are connected by a short-circuit line 17 to be short-circuited. Further, the third output terminal 6 and the N-phase electric circuit are connected to the dedicated terminals 18 and 19 of the dedicated branch breaker 16, respectively.
[0019]
When the occurrence of an earthquake is detected by the earthquake detection unit 7, the control unit 8 excites the relay coil 9 to close the relay contact 10, and the dedicated branch breaker 16 is cut off by the voltage output.
[0020]
In addition, as shown in FIG. 4, a switch 20 or the like may be used in place of the short-circuit wire 17 so that the circuit can be switched.
[0021]
As shown in FIG. 5, when the seismic device 1 is used for a normal leakage breaker 21, the input terminals 2 and 3 of the seismic device 1 are connected to the secondary terminals 22 and 23 of the leakage breaker 21, and the first An external resistor 24 is connected between the output terminal 4 and the second output terminal 5. The third output terminal 6 and the N-phase primary side terminal 25 of the leakage breaker 21 are connected.
[0022]
When the occurrence of an earthquake is detected by the earthquake detector 7, the controller 8 excites the relay coil 9 to close the relay contact 10, and the earth leakage breaker 21 is interrupted by the pseudo earth leakage output.
[0023]
In this embodiment, a relay is used as the alarm contact. However, a relay having a switching function such as a photocoupler may be used instead.
[0024]
【The invention's effect】
As described above, the seismic sensing device according to the present invention is a seismic sensing device that detects the occurrence of an earthquake and shuts off the breaker. In the seismic sensing device that detects the occurrence of an earthquake and shuts off the breaker, two input terminals and Three output terminals are provided, and one of the two input terminals is electrically connected to one of the three output terminals, and an alarm is provided between the remaining two output terminals. By providing the contacts, it is possible to output a plurality of alarms, and there is an excellent effect that it can be installed on all existing distribution boards.
[0025]
In addition, the output terminal connected to the input terminal and the one output terminal connected to the alarm contact are connected by a short-circuit line or a switch, so that there is an excellent effect that the alarm can be voltage output. .
[0026]
Also, by connecting an external resistor between the output terminal connected to the input terminal and one output terminal connected to the alarm contact, the alarm can be output as a pseudo-leakage, and the resistor can be connected externally. Therefore, there is an excellent effect that the apparatus can be reduced in size.
[Brief description of the drawings]
FIG. 1 is a circuit diagram of a seismic sensing device according to the present invention.
FIG. 2 is a circuit diagram showing a state in which the seismic sensing device according to the present invention is connected to a dedicated earth leakage breaker.
FIG. 3 is a circuit diagram showing a state in which the seismic device according to the present invention is connected to a dedicated branch breaker.
FIG. 4 is a seismic sensing device in which a switch is provided between a first output terminal and a second output terminal.
FIG. 5 is a circuit diagram showing a state in which the seismic sensing device according to the present invention is connected to an earth leakage breaker.
FIG. 6 is a circuit diagram of a conventional seismic sensing device for a dedicated earth leakage breaker.
FIG. 7 is a circuit diagram of a conventional seismic device for a dedicated branch breaker.
FIG. 8 is a circuit diagram of a conventional seismic sensing device for an earth leakage breaker.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Seismic device 2, 3 ... Input terminal 4-6 ... Output terminal 7 ... Earthquake detection part 8 ... Control part 9 ... Relay coil 10 ... Relay contact 11 ... Dedicated earth leakage breaker 16 ... Dedicated branch breaker 17 ... Short circuit wire 21 ... Earth leakage breaker 24 ... Resistance

Claims (3)

In the seismic sensing device that detects the occurrence of an earthquake and shuts off the breaker, the seismic device includes two input terminals and three output terminals, one of the two input terminals, and one of the three output terminals. Any one of the output terminals is electrically connected, and an alarm contact is provided between the remaining two output terminals. 2. The seismic device according to claim 1, wherein the output terminal connected to the input terminal and the one output terminal connected to the alarm contact are connected by a short-circuit line or a switch. The listed seismic device. 2. The seismic device according to claim 1, wherein an external resistor is connected between the output terminal connected to the input terminal and the one output terminal connected to the alarm contact. Seismic device.

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