JP7412097B2 - Automatic power switching device - Google Patents

Description

The present invention relates to an automatic power supply switching device that switches the power supply to a load to a distributed power supply when a commercial power supply fails.

There is an automatic power switching device that switches the power supplied to the load to a distributed power source in the event of a commercial power outage. For example, in Patent Document 1, an operation handle that enables manual switching is provided, and by operating this operation handle with a motor drive, when a power outage occurs in the commercial power source, it is detected and switched to a distributed power source.

JP 2017-200389 Publication

The technology disclosed in Patent Document 1 performs switching control by placing a handle hook over the operating handle that enables manual operation, so removing the handle hook allows manual switching, which is effective for maintenance or when a sensor malfunctions. Met.
However, in reality, manual switching is possible by separating the handle hook part from the operating handle, but on the other hand, the switching control part remains active, so if the commercial power is cut off, the switching operation will be performed and the handle hook will switch. It worked. Therefore, handling the handle hook was troublesome.

In view of these problems, the present invention aims to provide an automatic power switching device that can stop the automatic switching operation itself with a simple operation, and that prevents the handle hook from moving after the handle hook is removed. The purpose is

In order to solve the above problem, the invention of claim 1 provides a switching mechanism unit that switches the power source of a load between a commercial power source and a distributed power source, a switching drive unit that drives the switching mechanism unit, and a power outage of the commercial power source. / It has a switching control unit that monitors power restoration and controls the switching drive unit, and switches the load power source from the commercial power source to the distributed power source when the commercial power source is out of power, and then switches the load power source from the commercial power source to the distributed power source when the commercial power source is restored. The automatic power switching device performs back switching, and includes a stop button that stops the control of the switching control unit, and the switching control unit receives the operation of the stop button and controls the switching mechanism to switch between the commercial power source and the distributed power source. It is characterized in that it stops functioning after being stopped at a neutral position where no load is connected to any of the power supplies .
According to this configuration, the switching control unit stops when the stop button is operated, so there is no switching operation even if there is a power outage in the commercial power supply, and there is no need to perform troublesome operations such as disconnecting the switching drive unit. Able to perform power supply maintenance.

In addition, since the switching mechanism section moves to the neutral position and then stops when the stop button is operated, the switching mechanism section stops with the load being released from the power source. Therefore, there is no need to perform a switching operation after stopping the power supply, making it easy to maintain the distributed power supply.

The invention according to claim 2 is the configuration according to claim 1 , which has an operation handle that enables manual switching operation of the switching mechanism section, and the switching drive section engages with the operation handle to operate the operation handle. The switching controller has a handle hook that performs switching when the handle hook is disengaged from the operating handle, and a sensor that detects when the handle hook is disengaged from the operating handle. It is characterized by stopping the control.
According to this configuration, switching control is stopped when the handle hook is disengaged from the operating handle. Therefore, even if the handle hook is removed without operating the stop button, the situation will actually be that the stop button has been operated, and the switching operation will not occur even if the commercial power supply is interrupted.

According to the present invention, since the switching control unit is stopped by operating the stop button, there is no switching operation even if there is a power outage in the commercial power supply, and there is no need to perform troublesome operations such as disconnecting the switching drive unit. maintenance can be carried out.

FIG. 1 is a functional block diagram showing an example of an automatic power switching device according to the present invention. FIG. 2 is a perspective view of an automatic power switching device. FIG. 2 is a perspective view of an automatic power supply switching device in which a switching control section and a switching mechanism section are separated.

Hereinafter, embodiments embodying the present invention will be described in detail with reference to the drawings. FIG. 1 is a block diagram showing an example of an automatic power switching device according to the present invention. As shown in FIG. 1, the automatic power switching device 1 includes a switching mechanism section 2 that switches the power source of the load 7, a switching drive section 3 that operates the switching mechanism section 2, and a switching control section 4 that controls switching. have.

The switching mechanism unit 2 includes a commercial power supply connection terminal 21 to which a commercial power supply 5 is connected, a distributed power supply connection terminal 22 to which a distributed power supply 6 such as a storage battery is connected, a load connection terminal 23 to which a load 7 is connected, and a power supply switching operation. It has an operating handle 24 for performing the following operations. By switching the operating handle 24, the load connection terminal 23 is connected to the commercial power source 5, connected to the distributed power source 6, or not connected to any of them.

The switching drive unit 3 includes a handle hook 31 that is placed over and engaged with the operating handle 24 to operate the operating handle 24, a handle control mechanism unit 32 that switches and operates the operating handle 24 via the handle hook 31, and a handle control mechanism unit 32. A motor 33 and a motor driver 34 are provided.
The sensor 32a of the handle control mechanism section 32 is a sensor that detects the angle of the handle hook 31, and the sensor 32a detects the angle of the handle hook 31. The disengaged standing or tilted arrangement state is determined, and if the engagement is disengaged, it is detected and the switching control unit 4 is notified.

The switching control section 4 is connected to a commercial power supply voltage detection section 36 and a stop button 37 consisting of a tact switch, and connects the load connection terminal 23 to the commercial power supply connection terminal 21 while the commercial power supply 5 is in the energized state. When the commercial power supply voltage is not detected, that is, when the commercial power supply is interrupted, the distributed power supply connection terminal 22 is connected to the load connection terminal 23. Furthermore, when the stop button 37 is pressed, the switching control is stopped.

FIG. 2 is a perspective view of the automatic power switching device 1, and FIG. 3 is an exploded view thereof, in which 8 is a first housing that accommodates the switching mechanism section 2, and 9 is a second housing that accommodates the switching drive section 3 and the switching control section 4. The housing of the automatic power switching device 1 is constructed by connecting two housings. Note that 51 is a branch breaker connected to the load connection terminal 23, and 52 is an earth leakage breaker to which the distributed power source 6 is connected.

The commercial power supply connection terminal 21 is provided at the rear of the first housing 8, and the distributed power supply connection terminal 22 and the load connection terminal 23 are provided at the front side.
The operating handle 24 can be tilted both forward and backward from the neutral position; when tilted backward, the load 7 is connected to the commercial power source 5, and when tilted forward, the load 7 is connected to the distributed power source 6. This operating handle 24 is operated when switching the power source manually.
The handle hook 31 is attached to cover the operating handle 24, and the operating handle 24 is operated by the handle hook 31.

The automatic power supply switching device 1 configured as described above operates as follows. By tilting the handle hook 31 shown in FIGS. 2 and 3 and placing it over the operating handle 24, switching control of the operating handle 24 by the switching control section 4 becomes possible.
The switching control unit 4 constantly monitors the commercial power supply 5 using the commercial power supply voltage detection unit 36, and the load connection terminal 23 is connected to the commercial power supply connection terminal 21 while the commercial power supply voltage is being detected. Specifically, the operating handle 24 is tilted backward. In this way, the commercial power source 5 is supplied to the load 7.

If a power outage occurs in the commercial power supply 5 in this state, the switching control unit 4 detects it via the commercial power supply voltage detection unit 36, and switching to the distributed power supply 6 is performed. Specifically, the motor 33 is driven to rotate the handle hook 31, and after the operation handle 24 is raised up, it is further tilted forward. As a result, the power source of the load 7 is switched from the commercial power source 5 to the distributed power source 6.

After that, the switching control unit 4 continues to monitor the voltage of the commercial power supply 5, and when the commercial power supply voltage detection unit 36 detects the voltage, that is, detects the restoration of power, it rotates the operating handle 24 in the opposite direction and tilts it backward. Return to state. As a result, the load 7 is connected to the commercial power supply 5 again.

However, when the stop button 37 is pressed while connected to the commercial power source 5, the switching control section 4 first performs control to move the switching mechanism section 2 to the neutral position. As a result, the operating handle 24, which had been tilted backward, is rotated to the upright position, and the load 7 is moved to a neutral position where it is not connected to any power source. Then, once you move, it stops functioning.
Thereafter, switching control is not performed regardless of the state of the commercial power supply 5 until a return operation is performed. For example, the handle hook 31 that is engaged with the operation handle 24 is lifted once to release the engagement, and then the handle hook 31 is reset by being engaged again.

Furthermore, even if the handle hook 31 is lifted to disengage from the operating handle 24 without pressing the stop button 37, the switching control unit 4 recognizes this via the sensor 32a and stops the switching control. do. FIG. 2 shows this state, and when the handle hook 31 is disengaged from the operating handle 24, the operating handle 24 can be manually operated.

In this way, since the operation of the switching control unit 4 is stopped by operating the stop button 37, the switching operation does not occur even if the commercial power supply 5 is interrupted, and troublesome operations such as disconnecting the switching drive unit 3 are not necessary. Maintenance of the distributed power source 6 can be carried out even without it.
Further, when the stop button 37 is operated, the switching mechanism section 2 moves to the neutral position and then stops, so the load 7 stops with the load 7 being released from the power source. Therefore, there is no need to perform a switching operation after stopping the power supply, and maintenance of the distributed power supply 6 is easy.
Furthermore, since the switching control stops when the handle hook 31 is disengaged from the operating handle 24, even if the handle hook 31 is removed without operating the stop button 37, the situation is that the stop button 37 has actually been operated, and the commercial There is no switching operation even if the power supply 5 is out of power.

In the above embodiment, automatic switching control is performed by operating the operating handle 24 for a power supply switching device equipped with an operating handle 24 for manual operation, but the operating handle 24 is not operated and the housing is closed. The switching mechanism section 2 may be directly switched by the switching drive section 3 inside the switching mechanism section 2 .

1. Automatic power switching device, 2. Switching mechanism section, 3. Switching drive section, 4. Switching control section, 5. Commercial power supply, 6. Distributed power supply, 7. Load, 8. 1 Housing, 9...Second housing, 21...Commercial power connection terminal, 22...Distributed power supply connection terminal, 23...Load connection terminal, 24...Operation handle, 31...Handle hook, 32...Handle control Mechanism unit, 33...Motor, 34...Motor driver, 36...Commercial power supply voltage detection unit, 37...Stop button.

Claims (2)

A switching mechanism unit that switches the power source of the load between a commercial power source and a distributed power source, a switching drive unit that drives the switching mechanism unit, and a switch that monitors power outage/recovery of the commercial power source and controls the switching drive unit. An automatic power supply switching device having a control unit, which switches the power source of a load from the commercial power source to the distributed power source when the commercial power source is out of power, and then switches back to the commercial power source when the commercial power source is restored,
comprising a stop button for stopping control of the switching control unit,
The switching control unit may control the switching mechanism unit in response to the operation of the stop button to stop the switching mechanism unit at a neutral position where no load is connected to either the commercial power source or the distributed power source, and then stop the function. An automatic power switching device featuring: The switching mechanism unit has an operation handle that enables manual switching operation, and the switching drive unit has a handle hook that engages with the operation handle and operates the operation handle to perform switching,
It further comprises a sensor that detects when the handle hook is disengaged from the operating handle,
The automatic power switching device according to claim 1 , wherein the switching control section stops switching control when the handle hook comes off the operating handle.

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