JP6670679B2 - Breaker with external control function and switchboard with seismic isolation function - Google Patents

Description

  The present invention provides a breaker with an external control function that performs an interruption operation by an external signal, and a seismic relay that generates a pseudo earth leakage when an earthquake is detected, and a seismic interruption function that shuts off a main earth leakage breaker when an earthquake occurs. Related to the distribution board.

  There is a distribution board with a seismic isolation function. For example, in Patent Literature 1, when a control unit (seismic relay) is connected to an electrical path of a main earth leakage breaker and a seismic sensor incorporated in the seismic relay detects an earthquake, the timing of the occurrence of a power failure or the power recovery At a predetermined timing such as a timing, a pseudo earth leakage current is generated in the electric circuit of the main earth leakage breaker to perform a delay cutoff operation.

JP-A-9-215178

In the above-mentioned conventional distribution board with seismic isolation function, connecting the seismic relay to the main earth leakage breaker allows all loads connected to the secondary side to be connected without incorporating the seismic isolation function into the main earth leakage breaker. The power was turned off. In addition, as described above, the occupants can smoothly evacuate by performing the shutoff operation at a predetermined timing after the occurrence of the earthquake, instead of immediately shutting down.
However, for some loads, it is desirable to shut off the power supply immediately after the occurrence of an earthquake, and for that purpose, a separate seismic relay was required as a branch breaker with a ground leakage breaker function.

  In view of the foregoing, the present invention provides a distribution board with a seismic isolation function that realizes both the delayed interruption of the main earth leakage breaker and the immediate interruption of some branch breakers with one seismic relay. It is another object of the present invention to provide a breaker with an external control function suitable for the distribution board.

In order to solve the above problem, a breaker with an external control function according to the first aspect of the present invention provides a circuit breaker in addition to an overcurrent cutoff function of operating a cutoff mechanism to cut off a circuit when an overcurrent or a short-circuit current flows in the circuit. , A signal input section that receives an external shutoff operation signal, a signal output section that receives a shutoff operation signal, and outputs a new shutoff operation signal, and shuts off the shutoff mechanism section that receives an external shutoff operation signal And a breaker control unit for generating a signal output from the signal output unit.
According to this configuration, in addition to the signal input unit that inputs the shutoff operation signal, by including a signal output unit that outputs the shutoff operation signal, even if a plurality of breakers that are forcibly shut off by an external shutoff operation signal are installed, If the signal output part is connected to the signal input part of another breaker and the path of the break operation signal between breakers is connected in series, the break operation signal from the outside can be input to the signal input of one breaker with external control function. By simply connecting the circuit breaker, all breakers to be forcibly cut off can be cut off. Therefore, only one device that generates the shutoff operation signal can be installed in a small space, and the connection work can be simplified.

The invention according to claim 2 is a main earth leakage breaker having a lead-in line of the electric circuit connected to the primary side, and a plurality of branch breakers connected to the secondary side electric circuit of the main earth leakage breaker for opening and closing the branch electric circuit of the electric circuit. A seismic isolation function-equipped switchboard with a seismic relay that shuts off the main earth leakage breaker at a predetermined timing after detecting an earthquake of a specific seismic intensity or higher. In addition to a pseudo-leakage output unit that delays and shuts off the main earth leakage breaker at a predetermined timing, an alarm output unit that immediately outputs an earthquake occurrence signal when an earthquake of a specific seismic intensity or more is detected, and at least two of the branch breakers One is the breaker with the external control function according to claim 1, wherein the shut-off operation signal is an earthquake occurrence signal, and the signal input of the alarm output unit and any one of the breakers with the external control function is provided. And the signal output section of the breaker with external control function is connected to the signal input section of another breaker with external control function, and the transmission path of the earthquake occurrence signal is connected in series between the breakers with external control function. It is characterized by being formed in.
According to this configuration, only one seismic relay can be installed to perform both the shutoff of the main earth leakage breaker and the immediate shutoff of multiple branch breakers. Functions can be provided.

ADVANTAGE OF THE INVENTION According to the breaker with an external control function which concerns on this invention, in addition to the signal input part which inputs a shut-off operation signal, it has a signal output part which outputs a shut-off operation signal, and a breaker which forcibly shuts off by an external shut-off operation signal Even if a plurality of circuit breakers are installed, if the signal output unit is connected to the signal input unit of another breaker and the path of the break operation signal between the breakers is connected in series, an external shut-off operation signal By simply connecting to the signal input section of the breaker with control function, all the breakers to be forcibly shut off can be turned off. Therefore, only one device that generates the shutoff operation signal can be installed in a small space, and the connection work can be simplified.
Further, according to the switchboard with a seismic isolation function according to the present invention, it is possible to implement both the delayed interruption of the main earth leakage breaker and the instantaneous interruption of a plurality of branch breakers simply by installing one seismic relay, It is possible to provide a seismic isolation function without increasing the size of the distribution board.

It is a lineblock diagram showing an example of a distribution board with a seismic isolation function concerning the present invention. It is a circuit block diagram of a seismic relay. It is a circuit block diagram of a 2nd branch breaker.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a configuration diagram showing an example of a distribution board with a seismic isolation function according to the present invention. , A "distribution path".) A distribution board 10 that forms a plurality of branch paths from A is shown. In FIG. 1, reference numeral 1 denotes a main earth leakage breaker (main ELB) having an earth leakage cut-off function, reference numerals 2 and 3 denote branch breakers, and reference numeral 4 denotes a seismic relay. However, among the branch breakers 2 and 3, 2 (2a to 2n) is a conventional branch breaker (hereinafter, referred to as "first branch breaker"), and 3 (3a to 3n) are breakers with an external control function (described later). Hereinafter, it is referred to as a "second branch breaker."

The lead line of the electric circuit A (primary electric circuit A1) is connected to the primary side of the master ELB1, and the branch electric circuit B1 (B1a) is connected to the secondary electric circuit A (secondary electric circuit A2) via the first branch breaker 2. To B1n), and a branch electric circuit B2 (B2a to B2n) is formed via the second branch breaker 3.
Then, the seismic relay 4 is connected to the electric circuit A sandwiching the master ELB1, and when an earthquake of a specific seismic intensity or more occurs, a pseudo earth leakage is generated in the electric circuit A sandwiching the master ELB1 to shut off the master ELB1. Have been.

FIG. 2 shows a circuit block diagram of the seismic relay 4. As shown in FIG. 2, a seismic sensor 41 that detects an earthquake and outputs a signal corresponding to a shaking, a pseudo-leakage output unit 42 that outputs a pseudo-leakage, reports an earthquake occurrence, and outputs an earthquake occurrence signal to the outside. An alarm output unit 43 for outputting, a seismic relay CPU 44 for determining the seismic intensity based on shaking information from the seismic sensor 41, and the like are provided.
The seismic relay CPU 44 causes the alarm output unit 43 to output an earthquake occurrence signal from the measurement data of the seismic sensor 41 when the detected earthquake has a predetermined seismic intensity such as a seismic intensity 5 or a seismic intensity larger than that. In addition, a pseudo-leakage current is caused to flow from the pseudo-leakage output unit 42 to the electric circuit A of the connection destination after a predetermined period of time having the timer 44a. That is, a pseudo leakage occurs.

FIG. 3 shows a circuit block diagram of the second branch breaker 3. The second branch breaker 3 includes, in addition to a primary terminal including a pair of terminals connected to the secondary circuit A2 to form a branch circuit, a secondary terminal (not shown) connecting the branch circuit B2. As shown in FIG. 3, an input terminal (signal input unit) 31, an output terminal (signal output unit) 32, and a signal receiving unit 33 that receives an input signal if the signal is an earthquake occurrence signal output by the seismic relay 4. And a breaker control unit 36 for controlling the second branch breaker 3.
When an earthquake occurrence signal is input to the input terminal 31, under control of the breaker control unit 36, for example, a magnet coil having a plunger provided in the shutoff mechanism unit 34 is energized to cause the plunger to trip. Further, the breaker control unit 36 generates a new earthquake occurrence signal and outputs it from the output terminal 32.

  Although not shown, the second branch breaker 3 has an overcurrent interrupting function of shutting off the interrupting mechanism section 34 upon occurrence of an overcurrent and a short-circuit current, and also has a basic function as a branch breaker. I have.

Next, the connection and operation of the seismic relay 4 and the second branch breaker 3 will be specifically described. As shown in FIG. 1, the pseudo-leakage output section 42 of the seismic relay 4 is connected to one of the two voltage phases L1 and L2 of the primary side electric circuit A1 of the master ELB1 by a connection line S1. . Further, the seismic relay 4 has an input unit (not shown) for causing the pseudo earth leakage output unit 42 to output the earth leakage, and the input unit is connected to the neutral line N of the secondary side electric circuit A2 by the connection line S2. It is connected.
On the other hand, the alarm output unit 43 of the seismic relay 4 is connected to the input terminal 31 of one of the second branch breakers 3a of the second branch breakers 3 via the connection line S3. Note that the second branch breaker 3 selected at this time is arbitrary, and may be selected as close to the seismic relay 4.

  The output terminal 32 of the second branch breaker 3a is connected to the input terminal 31 of the second branch breaker 3b installed in the vicinity by a connection line S4a, and the output terminal 32 of the second branch breaker 3b is located in the vicinity. The connection terminal S4b is connected to the input terminal 31 of the other second branch breaker 3c, and the output terminal 32 and the input terminal 31 between the second branch breakers 3 are sequentially connected. In this way, all the second branch breakers 3 are connected to each other such that the transmission lines of the earthquake occurrence signals are connected in series.

  In FIG. 1, "in" indicates an input terminal 31, and "out" indicates an output terminal 32. Further, the seismic relay 4 has a power supply unit (not shown) connected to the secondary side electric circuit A2 of the master ELB1, and a connection line S2 of the seismic relay 4 is a power supply line connected to the neutral line N. I also use it.

  When the seismic relay 4 detects an earthquake having a predetermined seismic intensity or a seismic intensity higher than the preset seismic intensity, the switchboard 10 with the seismic isolation function configured as described above emits a sound (not shown) of the alarm output unit 43. The alarm is output from the alarm output unit 43 while an alarm is issued from the unit. Also, after a predetermined time such as three minutes, the pseudo earth leakage output unit 42 outputs a pseudo earth leakage.

On the other hand, in the second branch breaker 3 to which the earthquake occurrence signal has been transmitted, the signal receiving unit 33 recognizes the signal, and the breaker control unit 36 starts predetermined control. That is, the breaking mechanism 34 performs the breaking operation under the control of the breaker controller 36, and the branch electric circuit B2 is broken. Further, an earthquake occurrence signal is generated and output from the output terminal 32.
As a result, the other second branch breakers 3 connected by the transmission lines S4a, S4b,.
Note that, after a certain period of time after the second branch breaker 3 performs the shut-off operation, the main ELB 1 performs the shut-off operation due to a pseudo earth leakage output from the seismic relay 4.

As described above, by simply installing one seismic relay 4, it is possible to implement both the delay cutoff of the main earth leakage breaker 1 and the immediate cutoff of the plurality of second branch breakers 3, thereby increasing the size of the distribution board 10. It is possible to provide a seismic isolation function.
In addition, since the second branch breaker 3 that shuts off immediately has the output terminal 32 that outputs the earthquake occurrence signal in addition to the input terminal 31 that inputs the earthquake occurrence signal, even if a plurality of second branch breakers 3 are installed, If the output terminal 32 is connected to the input terminal 31 of another second branch breaker 3 and the path of the earthquake generation signal between the second branch breakers 3 is connected in series, the earthquake generation signal from the seismic relay 4 can be obtained. By simply connecting to the input terminal 31 of one second branch breaker 3, all the branch breakers to be forcibly cut off (immediately cut off) can be turned off. Therefore, only one seismic relay 4 for generating an earthquake occurrence signal can be installed in a small space, and the connection work can be simplified.

Note that the seismic relay 4 outputs a simulated earth leakage after a certain period of time after the detection of the earthquake. However, the timing of the delay operation does not have to be defined by the time, and may be adjusted to the power failure due to the occurrence of the earthquake. It may be adjusted to the power recovery.
In addition, the second branch breaker 3 of the above-described embodiment performs a shut-off operation when an earthquake occurrence signal is input to the input terminal 31. The shut-off operation signal for the shut-off operation may be set in advance, and the make contact signal and the break contact signal may be set. Either is acceptable. However, the output terminal 32 is controlled so that the same signal as the input signal is output.
Furthermore, although the configuration applied to the distribution board of the single-phase three-wire circuit is shown, the distribution board with the seismic isolation function of the present invention is applicable to a single-phase two-wire circuit and a three-phase three-wire circuit. It can be easily applied.

  1. Main earth leakage breaker, 2 (2a, 2n) 1st branch breaker (branch breaker), 3 (3a, 3n) 2nd branch breaker (breaker with external control function), 4・ Seismic relay, 10 ・ ・ Distribution board, 31 ・ ・ Input terminal (signal input part), 32 ・ ・ Output terminal (signal output part), 33 ・ ・ Signal receiving part, 34 ・ ・ Interruption mechanism part, 36 ・· Breaker control unit, 41 · · seismic sensor, 42 · · · pseudo leakage output unit, 43 · · alarm output unit, 44 · · · seismic relay CPU, A · · · single-phase three-wire circuit, B1, B2 · · · Branch circuit.

Claims (2)

When an overcurrent or short-circuit current flows in the electric circuit, in addition to the overcurrent interruption function of operating the interruption mechanism unit to interrupt the electric circuit,
A signal input unit for receiving a shutoff operation signal from the outside, a signal output unit for receiving a shutoff operation signal and outputting a new shutoff operation signal, and shutting off the shutoff mechanism unit in response to the external shutoff operation signal A breaker control unit for operating and generating a signal output from the signal output unit. A mains earth leakage breaker with a service line lead-in connected to the primary side, a plurality of branch breakers connected to a secondary side electric circuit of the mains earth leakage breaker for opening and closing a branch electric circuit of the electric circuit, a specific seismic intensity or more A seismic-sensing shut-off function-equipped distribution board comprising: a seismic relay that shuts off the main earth leakage breaker at a predetermined timing after sensing the earthquake.
The seismic relay includes a pseudo-leakage output unit that delays and shuts off the main earth leakage breaker at a predetermined timing after the detection of an earthquake, and an alarm output that immediately outputs an earthquake occurrence signal when an earthquake greater than or equal to the specific seismic intensity is detected. Part
At least two of the branch breakers are the breakers with external control functions according to claim 1, and the shutoff operation signal is the earthquake occurrence signal,
The alarm output section is connected to the signal input section of any one of the breakers with external control function, and the signal output section of the breaker with external control function and the signal input section of another breaker with external control function are connected. Is connected to
A distribution board with a seismic isolation function, wherein a transmission path of the earthquake occurrence signal is formed in series between the breakers with an external control function.

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