JP2020092061A - Cooperation unit and circuit breaker system - Google Patents

Abstract

To obtain a cooperation unit and a circuit breaker system that can realize cooperation between circuit breakers with a simple configuration.SOLUTION: A cooperation unit 30 cooperates the state of a first circuit breaker 10 and the state of a second circuit breaker 20. The cooperation unit 30 is connected to a first switch 11, a second switch 12, a third switch 21, a fourth switch 22, a first voltage trip device 13, and a second voltage trip device 23, and the state of the first circuit breaker 10 and the state of the second circuit breaker 20 are interlocked.SELECTED DRAWING: Figure 1

Description

The present invention relates to a link unit and a circuit breaker system that link the states of two circuit breakers.

BACKGROUND ART Conventionally, there is known an apparatus that needs to be supplied with power from two power supply systems having different frequencies at the same time. Such a device is supplied with power from each power supply system via a circuit breaker for each power supply system, but when power is supplied from only one power supply system, it does not operate normally or does not operate itself. There is a case. In this case, it is necessary to coordinate the circuit breakers connected to each power system with respect to the opening/closing operation and the tripping operation. Patent Document 1 discloses a technique in which an operation handle for performing an opening/closing operation and a trip bar serving as a starting point of a tripping operation are mechanically linked between circuit breakers.

JP 2001-143596 A

However, in the technique described in Patent Document 1, since the operation handle and the trip bar are mechanically linked between the circuit breakers, a highly accurate component is provided in order to prevent unnecessary operation and non-operation of the circuit breaker. There is a problem that a connection structure is required.

The present invention has been made in view of the above, and an object thereof is to obtain a cooperation unit that can realize cooperation between circuit breakers with a simple configuration.

In order to solve the above-mentioned subject and to achieve an object, a cooperation unit of the present invention makes the state of a 1st circuit breaker and the state of a 2nd circuit breaker cooperate. The first circuit breaker includes a first switch that electrically outputs an open/closed state of the first circuit breaker, and a second switch that electrically outputs a tripped state of the first circuit breaker. A first voltage trip device that trips the first circuit breaker with an electrical input. The second circuit breaker includes a third switch that electrically outputs the open/closed state of the second circuit breaker, and a fourth switch that electrically outputs the trip state of the second circuit breaker. A second voltage trip device that trips the second circuit breaker with an electrical input. The cooperation unit is connected to the first switch, the second switch, the third switch, the fourth switch, the first voltage trip device, and the second voltage trip device, and the first circuit breaker. And the state of the second circuit breaker are interlocked.

According to the present invention, there is an effect that the cooperation between the circuit breakers can be realized with a simple configuration.

The figure which shows the structural example of the circuit breaker system concerning Embodiment 1 of this invention. The figure for demonstrating the relationship between the state of the circuit breaker concerning Embodiment 1, and the contact state of an AX switch. The figure for demonstrating the relationship between the state of the circuit breaker concerning Embodiment 1, and the contact state of AL switch. The figure which shows the electrical connection of the circuit breaker system concerning Embodiment 1. External view of a first circuit breaker and a second circuit breaker according to a second embodiment of the present invention The figure which shows an example of the connection structure of the 1st circuit breaker in a circuit breaker system concerning Embodiment 2, a 2nd circuit breaker, and a cooperation unit.

Below, a cooperation unit and a circuit breaker system concerning an embodiment of the invention are explained in detail based on a drawing. The present invention is not limited to this embodiment.

Embodiment 1.
1 is a diagram showing a configuration example of a circuit breaker system according to a first embodiment of the present invention. As shown in FIG. 1, the circuit breaker system 1 according to the first embodiment is connected between power supply systems 2 and 3 and loads 4 and 5. The power supply system 2 and the power supply system 3 are different from each other in at least one of frequency and voltage, for example. The load 4 and the load 5 are included in the same device, for example.

The circuit breaker system 1 includes a first circuit breaker 10, a second circuit breaker 20, and a cooperation unit that links the state of the first circuit breaker 10 and the state of the second circuit breaker 20. And 30. The first circuit breaker 10 is connected between the power supply system 2 and the load 4, and connects and disconnects an electric path between the power supply system 2 and the load 4.

For example, the first circuit breaker 10 connects or disconnects the electric path between the power supply system 2 and the load 4 when the operation handle 14 is operated. The state of the first circuit breaker 10 is on when the electric path between the power supply system 2 and the load 4 is connected by the closing operation of the operation handle 14, and the power is turned on by the opening operation of the operation handle 14. It is in the off state when the electric path between the system 2 and the load 4 is cut off. Further, in the first circuit breaker 10, an overcurrent or a leakage current flows in the electric path between the power supply system 2 and the load 4 in a state where the electric path between the power supply system 2 and the load 4 is connected. In this case, the electric path between the power supply system 2 and the load 4 is cut off to enter the trip state.

The second circuit breaker 20 is connected between the power supply system 3 and the load 5, and connects and disconnects the electric path between the power supply system 3 and the load 5. For example, the second circuit breaker 20 connects or disconnects the electric path between the power supply system 3 and the load 5 when the operation handle 24 is operated. The state of the second circuit breaker 20 is the ON state when the electric path between the power supply system 3 and the load 5 is connected by the closing operation of the operation handle 24, and the power is turned on by the opening operation of the operation handle 24. It is in the off state when the electric path between the system 3 and the load 5 is cut off. Further, in the second circuit breaker 20, an overcurrent or a leakage current has flowed in the electric path between the power supply system 3 and the load 5 while the electric path between the power supply system 3 and the load 5 is connected. In this case, the electric path between the power supply system 3 and the load 5 is cut off, and a trip state is set.

The first circuit breaker 10 includes a first switch 11 that electrically outputs an open/closed state of the first circuit breaker 10 and a second switch 11 that electrically outputs a trip state of the first circuit breaker 10. Switch 12 and a first voltage trip device 13 that trips the first circuit breaker 10 by an electrical input.

The second circuit breaker 20 has a third switch 21 that electrically outputs the open/closed state of the second circuit breaker 20 and a fourth switch 21 that electrically outputs the trip state of the second circuit breaker 20. Switch 22 and a second voltage trip device 23 that trips the second circuit breaker 20 by an electrical input.

The first switch 11 and the third switch 21 are, for example, AX (Auxiliary contact) switches, and the second switch 12 and the fourth switch 22 are, for example, AL (Alarm contact) switches. AX and AL switches are common options for circuit breakers. In the following description, it is assumed that the first switch 11 and the third switch 21 are AX switches, and the second switch 12 and the fourth switch 22 are AL switches, but the present invention is not limited to this example. Not done.

The cooperation unit 30 is connected to the first switch 11, the second switch 12, the third switch 21, the fourth switch 22, the first voltage trip device 13, and the second voltage trip device 23. , The open/closed state of the first circuit breaker 10 and the open/closed state of the second circuit breaker 20 are interlocked.

The cooperation unit 30 includes a drive circuit 31 and a connecting portion 32. The drive circuit 31 electrically inputs to the first voltage trip device 13 and the second voltage trip device 23 when the state of the first switch 11 and the state of the second switch 12 are different. The connection portion 32 connects the second switch 12 to the second voltage trip device 23 and connects the fourth switch 22 to the first voltage trip device 13.

The drive circuit 31 includes a timer relay 33, a first timer relay contact 34, and a second timer relay contact 35. When the voltage of the control power supply 6 is not applied to the timer relay 33, the first timer relay contact 34 and the second timer relay contact 35 are open. When the voltage of the control power supply 6 is applied to the timer relay 33, charging of the timer relay 33 is started. When the time from the start of charging the timer relay 33 reaches the timer set time of the timer relay 33, the timer relay 33 causes each of the first timer relay contact 34 and the second timer relay contact 35 to change from the open state to the closed state. To

FIG. 2 is a diagram for explaining the relationship between the state of the circuit breaker and the contact state of the AX switch according to the first embodiment. When the state of the first circuit breaker 10 is the off state or the trip state, the b contact of the first switch 11 which is an AX switch is in the closed state, and the terminals AXb and AXc of the first switch 11 are It is in the connected state. When the state of the first circuit breaker 10 is on, the a contact of the first switch 11 is closed, and the terminals AXa and AXc of the first switch 11 are connected.

Similarly, when the state of the second circuit breaker 20 is the off state or the trip state, the b contact of the third switch 21 which is the AX switch is in the closed state, and the terminal AXb of the third switch 21 and the terminal This is a state in which AXc is connected. When the second circuit breaker 20 is in the on state, the a contact of the third switch 21 is in the closed state, and the terminal AXa and the terminal AXc of the third switch 21 are connected. is there.

FIG. 3 is a diagram for explaining the relationship between the state of the circuit breaker and the contact state of the AL switch according to the first embodiment. When the state of the first circuit breaker 10 is the off state or the on state, the b contact of the second switch 12 which is an AL switch is closed, and the terminals ALb and ALc of the second switch 12 are It is in the connected state. When the state of the first circuit breaker 10 is the trip state, the a contact of the second switch 12 is in the closed state, and the terminal ALa and the terminal ALc of the second switch 12 are in the connected state.

Similarly, when the state of the second circuit breaker 20 is the off state or the on state, the contact b of the fourth switch 22 which is an AL switch is closed, and the terminal ALb of the fourth switch 22 and the terminal ALb are closed. This is a state where ALc is connected. When the second circuit breaker 20 is in the trip state, the contact a of the fourth switch 22 is closed, and the terminal ALa and the terminal ALc of the fourth switch 22 are connected to each other. is there.

FIG. 4 is a diagram showing electrical connection of the circuit breaker system according to the first embodiment. As shown in FIG. 4, a series circuit of the first switch 11, the third switch 21, and the timer relay 33 is connected in parallel to the control power supply 6. Specifically, in the first switch 11, the terminal AXc is connected to one end of the control power supply 6, the terminal AXa is connected to the terminal AXb of the third switch 21, and the terminal AXb is the terminal AXa of the third switch 21. Connected to. One end of the timer relay 33 is connected to the terminal AXc of the third switch 21, and the other end of the timer relay 33 is connected to the other end of the control power supply 6.

Further, as shown in FIG. 4, a series circuit of the first voltage trip device 13 and the first timer relay contact 34 is connected in parallel to the control power supply 6. Further, a series circuit of the second voltage trip device 23 and the second timer relay contact 35 is connected to the control power supply 6 in parallel.

The first timer relay contact 34 is connected in parallel to the fourth switch 22, and the second timer relay contact 35 is connected in parallel to the second switch 12. Specifically, the terminal ALa of the fourth switch 22 is connected to one end of the first timer relay contact 34, and the terminal ALc of the fourth switch 22 is connected to the other end of the first timer relay contact 34. To be done. The terminal ALa of the second switch 12 is connected to one end of the second timer relay contact 35, and the terminal ALc of the second switch 12 is connected to the other end of the second timer relay contact 35.

The operation of the circuit breaker system 1 configured as above will be described. First, the operation of the circuit breaker system 1 when the two power supply systems 2 and 3 are normally applied to the device having the loads 4 and 5 will be described.

When each of the first circuit breaker 10 and the second circuit breaker 20 is in the off state, the first switch 11, the third switch 21, the second switch 12, the fourth switch 22, the first timer The states of the relay contact 34 and the second timer relay contact 35 are as shown in FIG. When only the first circuit breaker 10 is turned on by the closing operation of the operation handle 14 of the first circuit breaker 10 from the state shown in FIG. 4, the a contact of the first switch 11 is opened. It will be closed. Therefore, the terminal AXc of the first switch 11 and the terminal AXc of the third switch 21 are connected via the terminal AXa of the first switch 11 and the terminal AXb of the third switch 21. Therefore, the voltage of the control power supply 6 is applied to the timer relay 33 via the first switch 11 and the third switch 21, and charging of the timer relay 33 is started.

Then, the second circuit breaker 20 is closed by closing the operation handle 24 of the second circuit breaker 20 until the time set after the timer relay 33 is charged reaches the timer set time of the timer relay 33. When is turned on, the connection between the terminal AXc of the first switch 11 and the terminal AXc of the third switch 21 is released. Therefore, the voltage of the control power supply 6 is not applied to the timer relay 33, and the timer relay 33 is reset. As a result, the ON state of the first circuit breaker 10 and the ON state of the second circuit breaker 20 are maintained, and the power supply from the two power supply systems 2 and 3 to the device having the loads 4 and 5 is continued. Done.

Similarly, when only the second circuit breaker 20 is turned on by closing the operation handle 24 to the second circuit breaker 20 from the state shown in FIG. 4, the a contact of the third switch 21 is turned on. From open to closed. Therefore, the terminal AXc of the first switch 11 and the terminal AXc of the third switch 21 are connected via the terminal AXb of the first switch 11 and the terminal AXa of the third switch 21. As a result, the charging of the timer relay 33 is started. However, if the operation handle 14 of the first circuit breaker 10 is closed before the timer set time of the timer relay 33 is reached, the timer relay 33 is turned on. Since it is reset, the ON state of the first circuit breaker 10 and the ON state of the second circuit breaker 20 are maintained. As a result, power is continuously supplied from the two power supply systems 2 and 3 to the device having the loads 4 and 5.

Next, the operation of the circuit breaker system 1 when only one power supply system of the power supply systems 2 and 3 is turned on to the device having the loads 4 and 5 will be described. When only the first circuit breaker 10 is turned on by closing the operation handle 14 of the first circuit breaker 10 from the state shown in FIG. 4, charging of the timer relay 33 starts as described above. To be done.

If the second circuit breaker 20 does not turn on by the time the charging of the timer relay 33 starts to reach the timer set time of the timer relay 33, the first timer relay contact 34 opens. Then, the closed state is established, and the voltage of the control power supply 6 is applied to the first voltage trip device 13. Therefore, the first circuit breaker 10 is in a trip state.

Similarly, when only the second circuit breaker 20 is turned on by closing the operation handle 24 from the state shown in FIG. 4, charging of the timer relay 33 is started. If the first circuit breaker 10 is not turned on by the time the charging of the timer relay 33 is started until the timer set time of the timer relay 33 is reached, the second timer relay contact 35 is closed from the open state. Then, the voltage of the control power supply 6 is applied to the second voltage trip device 23. As a result, the second circuit breaker 20 enters a trip state.

As described above, in the link unit 30, only one circuit breaker of the first circuit breaker 10 and the second circuit breaker 20 is turned on after only one circuit breaker is turned on. When a certain period reaches the timer setting period, the other circuit breaker is put into a trip state. As a result, the cooperation unit 30 prevents the period in which only one of the first circuit breaker 10 and the second circuit breaker 20 is in the on state from being maintained beyond the timer setting period. can do. That is, it is possible to prevent the state in which power is being supplied from only one system from being maintained beyond the timer setting period.

Next, the first circuit breaker 10 and the second circuit breaker 20 are both in the ON state and the power supply systems 2 and 3 are turned on to the device having the loads 4 and 5 from the first circuit breaker 10 The operation of the circuit breaker system 1 when only one of the second circuit breakers 20 is turned off will be described.

When the first circuit breaker 10 and the second circuit breaker 20 are both on, the first circuit breaker 10 is turned off by opening the operation handle 14 of the first circuit breaker 10. Then, the b contact of the first switch 11 changes from the open state to the closed state. Therefore, the terminal AXc of the first switch 11 and the terminal AXc of the third switch 21 are connected via the terminal AXb of the first switch 11 and the terminal AXa of the third switch 21. As a result, the voltage of the control power supply 6 is applied to the timer relay 33 via the first switch 11 and the third switch 21, and charging of the timer relay 33 is started.

The operation handle 24 of the second circuit breaker 20 is not opened until the time after the charging of the timer relay 33 is started reaches the timer set time of the timer relay 33, and the second circuit breaker is not operated. When 20 is not turned off, the second timer relay contact 35 is changed from the open state to the closed state, and the voltage of the control power supply 6 is applied to the second voltage trip device 23. Therefore, the second circuit breaker 20 is in a trip state.

Similarly, from the state where both the first circuit breaker 10 and the second circuit breaker 20 are in the ON state, the operation handle 24 of the second circuit breaker 20 is opened and the second circuit breaker 20 is opened. When it is turned off, the charging of the timer relay 33 is started. The operation handle 14 of the first circuit breaker 10 is not opened until the time after the charging of the timer relay 33 is started reaches the timer set time of the timer relay 33, and the first circuit breaker is not operated. When 10 is not turned off, the first timer relay contact 34 is changed from the open state to the closed state, and the voltage of the control power supply 6 is applied to the first voltage trip device 13. Therefore, the first circuit breaker 10 is in a trip state.

As described above, in the link unit 30, only one circuit breaker of the first circuit breaker 10 and the second circuit breaker 20 is in the off state after only one circuit breaker is in the off state. When a certain period reaches the timer setting period, the other circuit breaker is put into a trip state. As a result, in the link unit 30, the period after only one of the first circuit breaker 10 and the second circuit breaker 20 is turned off is maintained beyond the timer setting period. Can be prevented. That is, it is possible to prevent the state in which power is being supplied from only one system from being maintained beyond the timer setting period.

Next, from the state in which both the first circuit breaker 10 and the second circuit breaker 20 are in the ON state, one of the first circuit breaker 10 and the second circuit breaker 20 causes an overcurrent. The operation of the circuit breaker system 1 in the trip state will be described.

When the first circuit breaker 10 and the second circuit breaker 20 are both in the ON state and the first circuit breaker 10 is in the trip state due to the occurrence of overcurrent, the second switch 12a The contact changes from open to closed. That is, the terminal ALa and the terminal ALc of the second switch 12 are connected. Therefore, the voltage of the control power supply 6 is applied to the second voltage trip device 23, and the second circuit breaker 20 enters a trip state.

Similarly, when the first circuit breaker 10 and the second circuit breaker 20 are both in the ON state and the second circuit breaker 20 is in the trip state due to the occurrence of the overcurrent, the fourth switch The a contact of 22 changes from an open state to a closed state. That is, the terminal ALa and the terminal ALc of the fourth switch 22 are connected. Therefore, the voltage of the control power supply 6 is applied to the first voltage trip device 13, and the first circuit breaker 10 is in a trip state.

In this way, the cooperation unit 30 sets the other circuit breaker to the trip state when only one circuit breaker of the first circuit breaker 10 and the second circuit breaker 20 changes from the ON state to the trip state. .. As a result, the cooperation unit 30 can prevent the state in which power is being supplied from only one system from being maintained beyond the timer setting period.

The cooperation unit 30 is not limited to the above configuration. That is, the cooperation unit 30 determines, for example, from the states of the first switch 11, the second switch 12, the third switch 21, and the fourth switch 22, the first circuit breaker 10 and the second circuit breaker. It suffices that the configuration is such that when only one of the circuit breakers of the switch 20 is in the off state or the trip state, the other circuit breaker can be set to the trip state.

As described above, the circuit breaker system 1 according to the first embodiment includes the first circuit breaker 10, the second circuit breaker 20, the state of the first circuit breaker 10, and the second circuit breaker. A link unit 30 that links the state of the circuit breaker 20 is provided. The first circuit breaker 10 includes a first switch 11 that electrically outputs an open/closed state of the first circuit breaker 10 and a second switch 11 that electrically outputs a trip state of the first circuit breaker 10. Switch 12 and a first voltage trip device 13 that trips the first circuit breaker 10 by an electrical input. The second circuit breaker 20 has a third switch 21 that electrically outputs the open/closed state of the second circuit breaker 20 and a fourth switch 21 that electrically outputs the trip state of the second circuit breaker 20. Switch 22 and a second voltage trip device 23 that trips the second circuit breaker 20 by an electrical input. The cooperation unit 30 is connected to the first switch 11, the third switch 21, the second switch 12, the fourth switch 22, the first voltage trip device 13, and the second voltage trip device 23. , The open/closed state of the first circuit breaker 10 and the open/closed state of the second circuit breaker 20 are interlocked. As a result, the cooperation between the first circuit breaker 10 and the second circuit breaker 20 can be realized with a simple configuration. Further, by using AX switches as the first switch 11 and the third switch 21 and AL switches as the second switch 12 and the fourth switch 22, the first circuit breaker 10 and the second circuit The circuit breaker 20 can be easily linked.

The cooperation unit 30 also includes a drive circuit 31 and a connecting portion 32. The drive circuit 31 electrically inputs to the first voltage trip device 13 and the second voltage trip device 23 when the state of the first switch 11 and the state of the third switch 21 are different. The connection portion 32 connects the second switch 12 to the second voltage trip device 23 and connects the fourth switch 22 to the first voltage trip device 13.

The drive circuit 31 further includes a first voltage trip device 13 and a second voltage trip device 23 when the state of the first switch 11 and the state of the third switch 21 are different from each other for a timer setting time. Make an electrical input to. The timer set time is an example of a preset time. As a result, the cooperation unit 30 prevents the period in which only one of the first circuit breaker 10 and the second circuit breaker 20 is in the off state from being maintained beyond the timer setting period. can do.

Embodiment 2.
In the circuit breaker system according to the second embodiment, a connector is provided in each of the first circuit breaker and the second circuit breaker, and the connector of the coupling unit is connected to the connector, whereby the first circuit breaker is provided. And the state of the second circuit breaker can be associated with each other. In the following, configurations similar to those of the circuit breaker system 1 according to the first embodiment will be denoted by the same reference numerals and description thereof will be omitted, and configurations different from the circuit breaker system 1 according to the first embodiment will be mainly described. It shall be.

FIG. 5 is an external view of the first circuit breaker and the second circuit breaker according to the second exemplary embodiment of the present invention. FIG. 6 is a diagram illustrating an example of a connection configuration of the first circuit breaker, the second circuit breaker, and the cooperation unit in the circuit breaker system according to the second embodiment.

As shown in FIG. 5, the first circuit breaker 10A according to the second embodiment includes connectors 15 and 16 on the cover portion on the operation handle 14 side. The connector 15 is connected to, for example, the terminals AXa, AXb, and AXc of the first switch 11, and the connector 16 is connected to, for example, ALa and ALc of the second switch 12 and the first voltage trip device 13. ..

Further, as shown in FIG. 5, the second circuit breaker 20A is also provided with connectors 25 and 26 on the cover portion on the side of the operation handle 24, similarly to the first circuit breaker 10A. The connector 25 is connected to, for example, the terminals AXa, AXb, and AXc of the third switch 21, and the connector 26 is connected to, for example, ALa and ALc of the fourth switch 22 and the second voltage trip device 23. ..

As shown in FIG. 6, the linkage unit 30A according to the second embodiment has four connectors connected to the connectors 15 and 16 of the first circuit breaker 10A and the connectors 25 and 26 of the second circuit breaker 20A. 36, 37, 38, 39. By connecting the connectors 36, 37, 38, 39 to the connectors 15, 16, 25, 26, the first circuit breaker 10A and the second circuit breaker 20A are connected to the cooperation unit 30A. The connection state shown in FIG.

As shown in FIG. 6, in the linking unit 30A, the first circuit breaker 10A and the second circuit breaker 20A are arranged side by side, and the connectors 15 and 16 of the first circuit breaker 10A and the second circuit breaker 10A are arranged. It can be connected to the connectors 25 and 26 of the circuit breaker 20A. Therefore, the linkage unit 30A can be easily attached to the first circuit breaker 10A and the second circuit breaker 20A.

The number and arrangement of the connectors for connecting the linking unit 30A and the first circuit breaker 10A are not limited to the examples described above, and can be changed as appropriate. Similarly, the number and arrangement of the connectors for connecting the linking unit 30A and the second circuit breaker 20A are not limited to the examples described above, and can be changed as appropriate.

The configurations described in the above embodiments are examples of the content of the present invention, and can be combined with another known technique, and the configurations of the configurations are not departing from the scope of the present invention. It is also possible to omit or change parts.

1 circuit breaker system, 2, 3 power supply system, 4, 5 load, 6 control power supply, 10, 10A 1st circuit breaker, 11 1st switch, 12 2nd switch, 13 1st voltage trip Device, 14, 24 Operation handle, 15, 16, 25, 26, 36, 37, 38, 39 Connector, 20, 20A Second circuit breaker, 21 Third switch, 22 Fourth switch, 23 Second Voltage trip device, 30, 30A cooperation unit, 31 drive circuit, 32 connection part, 33 timer relay, 34 first timer relay contact, 35 second timer relay contact, ALa, ALb, ALc, AXa, AXb, AXc terminals ..

Claims (5)

A coordinating unit for coordinating the state of the first circuit breaker and the state of the second circuit breaker,
The first circuit breaker is
A first switch for electrically outputting the open/closed state of the first circuit breaker;
A second switch for electrically outputting the trip state of the first circuit breaker;
A first voltage trip device that trips the first circuit breaker by an electrical input;
The second circuit breaker is
A third switch for electrically outputting the open/closed state of the second circuit breaker;
A fourth switch for electrically outputting the trip state of the second circuit breaker;
A second voltage trip device that trips the second circuit breaker by an electrical input;
The cooperation unit is
Connected to the first switch, the second switch, the third switch, the fourth switch, the first voltage trip device, and the second voltage trip device; A cooperation unit characterized by linking a state of a circuit breaker and a state of the second circuit breaker. The cooperation unit is
A drive circuit for electrically inputting to the first voltage trip device and the second voltage trip device when the state of the first switch and the state of the third switch are different;
A connecting portion that connects the second switch to the second voltage trip device and connects the fourth switch to the first voltage trip device. The listed cooperation unit. The drive circuit is
When a state in which the state of the first switch and a state of the third switch are different continues for a preset time, an electrical input is applied to the first voltage trip device and the second voltage trip device. The cooperation unit according to claim 2, wherein the cooperation unit is performed. A cooperation unit according to any one of claims 1 to 3,
The first circuit breaker;
A circuit breaker system comprising: the second circuit breaker. The first circuit breaker is
A connector connected to the first switch, the second switch, and the first voltage trip device,
The second circuit breaker is
A connector connected to the third switch, the fourth switch, and the second voltage trip device,
The cooperation unit is
A connector for connecting the connector of the first circuit breaker and the connector of the second circuit breaker in a state where the first circuit breaker and the second circuit breaker are arranged side by side; The circuit breaker system according to claim 4, wherein:

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