JP2017200390A - Power supply automatic switching device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an automatic power supply switching device for preventing an accident by shutting off a distributed power source from a power source when a contact between a commercial power source and a distributed power source occurs. SOLUTION: A switching opening / closing unit 4 for switching a load power supply between a commercial power supply and a distributed power supply, a switching drive unit 50 for driving the switching, and a switching drive unit 50 for monitoring power failure / recovery of the commercial power supply. It has a control circuit 61 for controlling, and the control circuit 61 switches the power supply of the load to the distributed power supply when a power failure occurs in the commercial power supply, switches to the commercial power supply when the power is restored, and supplies the power supply circuit 62 of the control circuit 61. Circuit open / close switches 63a and 64a and voltage sensors 63b and 64b are provided on both the power supply line from the commercial power supply and the power supply line from the distributed power supply circuit, and the control circuit 61 distributes when the voltage is detected from both voltage sensors 63b and 64b. Only the circuit open / close switch 64a on the power supply side is opened, and the changeover open / close portion 4 is changed to a neutral position that is not connected to any of them. [Selection diagram] Fig. 6

Description

  The present invention relates to an automatic power supply switching apparatus that switches to a distributed power supply and supplies power continuously to a specific load when a power failure occurs in a commercial power supply.

  There is a distribution board that can reduce the occurrence of failures and damage due to power outages by switching the power supply of specific electric devices such as emergency lights and refrigerators from a commercial power source to a distributed power source such as a storage battery when a power outage occurs. For example, in Patent Document 1, an automatic power supply switching device is provided to automatically switch to a distributed power supply when a commercial power supply fails, and the power supply of a specific electrical device is switched from the commercial power supply to a distributed power supply such as a storage battery so as to continue to operate. It is configured.

JP 2016-39755 A

Since the switching switch disclosed in Patent Document 1 performs automatic switching, a power source for operating the control unit is necessary, and both a commercial power source and a distributed power source are connected to the power source circuit of the control unit. Normally, power was supplied from a commercial power source, and power was supplied from a distributed power source only during a power failure.
A distributed power supply intended for emergency use such as a power outage is normally controlled so that it does not output power unless a power outage occurs in the commercial power supply, even if it is connected to the power supply circuit in parallel with the commercial power supply. There will be no contact with commercial power. However, it cannot be said that there is no possibility that the distributed power supply will start to be energized even though the commercial power supply is in an energized state due to a failure of the control circuit on the distributed power supply side. As a result, a large current may be generated and the connected equipment may be damaged.

  Therefore, in view of such problems, the present invention has an object to provide an automatic power supply switching device that shuts off the distributed power supply from the control unit of the automatic power supply switching device when a contact between the commercial power supply and the distributed power supply occurs. .

In order to solve the above problems, the invention of claim 1 is directed to a switching opening / closing unit that switches a load power source between a commercial power source and a distributed power source, a switching driving unit that drives switching, and a power failure / recovery of the commercial power source. And a control unit that controls the switching drive unit, and switches the load power source to a distributed power source when a power failure occurs in the commercial power source, and switches to the commercial power source when the power is restored. A circuit open / close switch and a voltage sensor are provided on both the power supply line from the commercial power supply circuit and the power supply line from the distributed power supply circuit to the power supply circuit of the unit, and the control unit detects the voltage from both voltage sensors and The circuit opening / closing switch is opened, the circuit opening / closing switch on the commercial power supply circuit side is closed, and the switch opening / closing unit is further operated to a neutral position where none is connected.
According to this configuration, even if the commercial power supply is in an energized state, when the power supply is also performed from the distributed power supply and the contact occurs, the distributed power supply is cut off from the power supply circuit. Therefore, it is possible to prevent an accident due to the occurrence of contact and protect the control unit. At the same time, the switching opening / closing unit is moved to the neutral position to cut off the load from both power sources, so that the load is not affected by incompatibility.

According to a second aspect of the present invention, in the configuration according to the first aspect, the switching opening / closing unit has an operation handle for manually switching the power source, while the switching drive unit is engaged with the operation handle to perform the operation. It has a handle hook part which switches a power supply by operating a handle, and a control part controls an operation handle and switches a power supply.
According to this configuration, since the handle hook portion is engaged with the operation handle for operation, automatic switching is possible without greatly changing the conventional manually operated switching switch, and automatic switching at low cost is possible. Can be implemented.

According to a third aspect of the present invention, in the configuration according to the first or second aspect, the switching opening / closing unit includes a first circuit connection terminal to which a commercial power source is connected, a second circuit connection terminal to which a distributed power source is connected, and a load. Are connected to each other, and the second circuit connection terminal and the third circuit connection terminal are copper bar-type terminals that enable connection of a plug-in type terminal of a branch breaker or an earth leakage breaker. It is characterized by that.
According to this configuration, since the second circuit connection terminal and the third circuit connection terminal are copper bar type terminals, the primary side connection terminal can directly connect the plug-in type branch breaker to the third circuit connection terminal, The secondary side connection terminal can directly connect the plug-in type earth leakage breaker to the two-circuit connection terminal. Therefore, a power distribution path from the switching open / close section to the branch breaker is not required, and a power distribution path from the earth leakage breaker to which the distributed power source is connected to the switching open / close section is not necessary, and a circuit for switching the power supply can be formed in a small space.

According to a fourth aspect of the present invention, in the configuration according to the third aspect, the switching opening / closing unit is assembled to a housing separable from the switching driving unit and the control unit, the operation handle is provided on the upper surface of the housing, and the first circuit is connected to the front side. The second circuit connection terminal and the third circuit connection terminal are disposed on the terminal and the back surface, and the switching drive unit and the control unit are assembled to the side portion of the housing.
According to this configuration, since the switching opening / closing part is formed by a dedicated housing, it can be used as a manual switching switch when the switching drive part and the control part are removed, and manual / automatic configuration change can be easily performed. it can.

According to a fifth aspect of the present invention, in the configuration of the fourth aspect, the handle hook portion, the switching drive portion, and the control portion are integrally formed and are detachably assembled to the housing.
According to this configuration, since the handle hook portion, the switching drive portion, and the control portion are integrally configured, the attachment / detachment from the housing can be easily performed, and the manual / automatic switching can be easily performed.

  According to the present invention, regardless of whether the commercial power supply is in an energized state, when the supply of electric power is performed from the distributed power supply and the contact occurs, the distributed power supply is cut off from the power supply circuit. Therefore, it is possible to prevent an accident due to the occurrence of contact and protect the control unit. At the same time, the switching opening / closing unit is moved to the neutral position to cut off the specific load from both power sources, so that the load is not affected by incompatibility.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an explanatory perspective view showing an example of an automatic power supply switching device according to the present invention, and also shows a branch breaker. It is a perspective explanatory view of a power automatic switching device which separated a housing which constitutes a switching opening and closing part and a switching drive control part, shows a state, and shows a branch breaker and a leakage breaker to be connected. FIG. 2 is an explanatory perspective view in which a partial cover of FIG. 1 is removed and an enlarged view of a main part is also shown. It is a top view of an automatic power supply switching apparatus, and has shown the branch breaker and the earth-leakage breaker together. It is an internal circuit diagram of a switching opening / closing part. It is a circuit block diagram of a switching drive control unit. It is AA sectional view. It is a BB sectional view. It is CC sectional view taken on the line. It is CC sectional view taken on the line which connected the switching opening / closing part to one side.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments embodying the present invention will be described below in detail with reference to the drawings. 1 to 4 show an example of an automatic power supply switching device according to the present invention, FIG. 1 is a perspective explanatory view, FIG. 2 is a perspective explanatory view in which a housing constituting a switching opening / closing portion and a switching drive control portion are separated, and FIG. Fig. 4 is a perspective explanatory view showing an enlarged view of a main part with a part of the cover removed, and Fig. 4 is a plan view. In both cases, the branch breaker and the leakage breaker to be connected are shown together. 1 is a power automatic switching device, 2 is a branch breaker, and 3 is a leakage breaker, and shows a configuration for switching a single-phase three-wire circuit.

The automatic power switching device 1 includes a switching opening / closing unit 4 and a switching drive control unit 5, and the switching opening / closing unit 4 is provided with an operation handle 11 for switching operation on the upper surface of the housing 10, and forward (right side shown in FIG. 4). ), A first circuit connection terminal 12 (first voltage electrode terminal 12a, neutral electrode terminal 12b, second voltage) connected to one fixed contact 17A of a pair of fixed contacts 17 (17A, 17B) described later. The second circuit connection terminal 13 (the first voltage electrode terminal 13a, the neutral electrode terminal) connected to the other fixed contact 17B is disposed on the back surface (left side shown in FIG. 4) of the housing 10. 13b, the second voltage electrode terminal 13c) are arranged. Further, third circuit connection terminals 14 (first voltage electrode terminal 14a, neutral electrode terminal 14b, and second voltage electrode terminal 14c) connected to a movable contact 15 described later are also arranged on the back surface. Reference numeral 6 denotes a terminal cover for protecting the terminals.
As described above, the switching opening / closing portion 4 is constituted by one housing 10 and constitutes a switching switch that can be switched manually.

The first circuit connection terminals 12 are screw-type terminals for connecting and fixing cables (not shown) with screws 8 (shown in FIG. 7). Three first circuit connection terminals 12 are connected in the left-right direction, and the first voltage extreme terminal 12 is connected as shown in FIG. The child 12a, the neutral electrode terminal 12b, and the second voltage electrode terminal 12c are arranged in this order.
On the other hand, the second and third circuit connection terminals 13 and 14 are disposed adjacent to a flat rising surface, and each terminal is formed of a horizontally long copper bar type terminal. In any case, three copper bar-type terminals are arranged side by side in the vertical direction, and are arranged from the top as neutral electrode terminals 13b and 14b, first voltage electrode terminals 13a and 14a, and second voltage electrode terminals 13c and 14c. . In particular, the third circuit connection terminal 14 is formed wide so that a plurality of branch breakers 2 can be connected adjacently.

  The branch breaker 2 is schematically shown, and an operation lever for opening and closing and a secondary terminal are omitted. However, the primary side terminal 21 is a plug-in type terminal formed by providing a notch in the lateral direction on the back surface of the branch breaker 2 as shown in FIG. 2, and is a copper bar type terminal ( The third circuit connection terminal 14) is sandwiched and connected from above and below. The primary side terminal 21 is arranged in such a manner that three terminals are arranged vertically, and are arranged from the top to the neutral electrode terminal 21b, the first voltage electrode terminal 21a, and the second voltage electrode terminal 21c. It is directly connected to the connection terminal 14.

  The earth leakage breaker 3 has substantially the same shape as the branch breaker 2, the operation lever 31 is arranged on the upper surface, the primary terminal 32 is arranged on the inclined front surface, and the secondary terminal 33 is arranged on the rear surface. Yes. Both terminals are vertically arranged in triplicate, and the primary side terminal 32 is formed as an immediate connection terminal. On the other hand, the secondary side terminal 33 is a plug-in type terminal formed by providing a cutout in the horizontal direction in the same manner as the primary side terminal 21 of the branch breaker 2. From the top, the neutral terminal 33b, the first terminal The voltage electrode terminal 33 a and the second voltage electrode terminal 33 c are arranged in this order, and are directly connected to the second circuit connection terminal 13 of the switching opening / closing part 4. Reference numeral 9 denotes a cable of the distributed power supply circuit.

  Thus, since the second circuit connection terminal 13 and the third circuit connection terminal 14 are copper bar-type terminals, the plug-in branch breaker 2 whose primary side connection terminal is directly connected to the third circuit connection terminal 14 can be directly connected. The secondary circuit connection terminal 13 can directly connect the plug-in type earth leakage breaker 3 to the second circuit connection terminal 13. Therefore, there is no need for a power distribution path from the switching open / close section 4 to the branch breaker 2, and no power distribution path from the earth leakage breaker 3 to which the distributed power source is connected to the switching open / close section 4 is required, thus forming a circuit for switching the power source in a small space. it can.

  FIG. 5 is a circuit diagram of the switching opening / closing part 4, that is, an internal circuit diagram of the housing 10 constituting the switching switch. As shown in FIG. 5, each connection terminal 12 (12a-12c), 13 (13a-13c), 14 (14a-14c) is comprised by 3 series. Then, the third circuit connection terminal 14 performs switching connection between the first circuit connection terminal 12 and the second circuit connection terminal 13 by operating the operation handle 11, and has three postures including a neutral open state that is not connected. It is selectable.

  Specifically, when the power automatic switching device 1 is used in a circuit that switches a power source from a commercial power source to a distributed power source to a storage battery system circuit having a storage battery in the event of a power failure, a branch breaker (specific branch) is connected to the third circuit connection terminal 14. A circuit to which an electrical device (specific load) is connected via a breaker 2 is connected, a commercial power supply circuit to which a commercial power supply is connected to the first circuit connection terminal 12, and a leakage breaker to the second circuit connection terminal 13 3 is connected to the storage battery system circuit (distributed power system circuit), and when a power failure of the commercial power source is detected as described later, the power source is switched.

The switching drive control unit 5 includes a switching drive unit 50 including a handle hook unit 52, a motor 53, and a transmission mechanism unit 54 that transmits the rotation of the motor 53 to the handle hook unit 52. A circuit accommodating portion 55 that accommodates a control circuit (control portion) that performs switching by controlling 53, an engagement / disengagement sensor 57 that detects an engagement / disengagement state of the handle hook portion 52 with respect to the operation handle 11, and a handle hook Three photo interrupters 58 for detecting the operating angle of the unit 52 are assembled to the base 51 via a fixed piece 51a.
The base 51 is fixed to the housing 10 with screws, and the switching drive control unit 5 is integrated with the switching opening / closing unit 4. Similarly, the switching drive control unit 5 fixed to the housing 10 is covered with a cover frame 56 fixed to the housing 10 with screws.
As described above, the handle hook portion 52, the switching drive portion 50, and the circuit housing portion 55 are integrally configured, so that the housing 10 can be easily attached and detached, and manual / automatic configuration change can be easily performed. it can.

  The handle hook portion 52 is formed in a lid shape covering the entire operation handle 11, and an end portion located on the side portion side of the operation handle 11 is pivotally attached to the rotating piece 54 b of the transmission mechanism portion 54. The handle hook portion 52 can be tilted / standing up and down in the left-right direction of the housing 10 with the shaft attachment portion as a center, and is configured to be detachable from the operation handle 11. FIG. 1 shows a state in which the handle hook portion 52 is tilted halfway. When the handle hook portion 52 is tilted in the direction indicated by the arrow P1 until it becomes horizontal, the operation handle 11 is covered as shown in FIG. The operating handle 11 is engaged.

The rotating piece 54b on which the handle hook portion 52 is attached is provided with a gear 54a that constitutes the transmission mechanism portion 54, and the gear 54a rotates through a gear 54c that is rotated by driving of the motor 53. The handle hook portion 52 rotates in the front-rear direction of the case 10. In this way, the operation handle 11 tilts forward or backward.
The motor 53 is assembled to the base 51 in a state of protruding in the direction of the housing 10 to be assembled. A cylindrical recess 10a is formed in a portion corresponding to the position of the motor 53 of the housing 10, and the motor 53 protrusions can be stored.

As described above, since the motor 53 having a depth can be accommodated in the housing 10 of the switching opening / closing part 4, even if the switching drive control part 5 is assembled to the housing 10, it can be configured so as not to protrude greatly, and can be assembled in a space-saving manner.
As shown in the enlarged view of FIG. 3, an engagement piece 59 for engaging with the photo interrupter 58 and recognizing the rotation angle of the rotation piece 57b is attached to the rotation piece 54b.

  FIG. 6 shows a circuit block diagram of the switching drive control unit 5. As shown in FIG. 6, a control circuit 61 for controlling the motor 53, a power supply circuit 62 for supplying power to the control circuit 61 and the motor 53, a circuit opening / closing switch 63a composed of a semiconductor switch for cutting off the commercial power, A commercial power supply voltage sensor 63b for detecting, a circuit opening / closing switch 64a comprising a semiconductor switch for shutting off the storage battery power supply, a storage battery power supply voltage sensor 64b for detecting the presence or absence of the storage battery power supply, etc. are provided. Both the electric wire and the feeder line from the storage battery power circuit are connected. In the circuit housing portion 55, a control circuit 61 and a power circuit 62 are housed.

  In the switching drive control unit 5 configured as described above, the control circuit 61 performs the following control in addition to the control of the switching opening / closing unit 4 described later. The control circuit 61 monitors the state of the commercial power source with the commercial power source voltage sensor 63b, monitors the output state of the storage battery power source with the storage battery power source voltage sensor 64b, and monitors the occurrence of contact.

As long as the commercial power supply is in an energized state, the normal storage battery power supply is in an off state without outputting a voltage. Therefore, the storage battery power supply voltage sensor 64b does not detect the voltage, but some problem occurs in the storage battery power supply and the commercial power supply is energized. When the storage battery power supply starts outputting electric power (voltage) in the state in which it is being operated, the storage battery power supply voltage sensor 64b detects this and outputs a voltage detection signal to the control circuit 61. Upon receiving this voltage detection signal, the control circuit 61 determines that contact has occurred and outputs an open signal to the circuit open / close switch 64a on the storage battery power circuit side, shuts off the storage battery power supply, and connects the power supply circuit 62 to the commercial power supply circuit. Only.
Further, the operation handle 11 of the switching opening / closing part 4 is operated via the handle hook part 52 to move the movable contact 15 to a neutral position not connected to any power source.

As described above, even when the commercial power source is in the energized state, when the supply of electric power is also performed from the storage battery power source and the contact occurs, the storage battery power source is cut off from the power supply circuit 62. Therefore, an accident due to the occurrence of contact can be prevented and the control circuit 61 can be protected. At the same time, the switching opening / closing unit 4 is moved to the neutral position to cut off the load from both power sources, so that the load is not affected by incompatibility.
In the normal state in which the commercial power supply is in the energized state, the normal storage battery power supply does not generate power, so the circuit open / close switch 64a on the storage battery power supply side may be in either the open / closed state. When the commercial power supply fails, the storage battery power supply recognizes it and starts outputting power, so the control circuit 61 continues control.

7 to 10 are cross-sectional views of the housing 10 cut at different parts. Hereinafter, the internal structure of the housing 10 and the operation of the switching opening / closing part 4 will be described with reference to this figure. FIG. 7 is a cross-sectional view taken along line AA of FIG. 3 and shows an internal connection structure of the three first voltage electrode terminals 12a, 13a, and 14a. As shown in FIG. 7, a movable contact 16a provided with movable contacts 15 on both front and rear sides is arranged in the housing 10 so as to hang down at the lower part of the operation handle 11, and a pair of fixed contacts 17 (17Aa, 17Ba) is arranged.
The movable contact 15 is connected to the first voltage electrode terminal 14a of the third circuit connection terminal 14 via the movable contact 16a and the flexible lead 18 connected to the movable contact 16a. One fixed contact 17Aa arranged at the front is connected to the first voltage electrode terminal 12a of the first circuit connection terminal 12 via the copper bar 7a, and the other fixed contact 17Ba arranged at the rear via the copper bar 7b. The second circuit connection terminal 13 is connected to the first voltage electrode terminal 13a (shown in FIG. 2).

FIG. 8 is a cross-sectional view taken along the line B-B and shows an internal connection structure of the three neutral electrode terminals 12b, 13b, and 14b. As shown in FIG. 8, a movable contact 16b provided with movable contacts 15 on both front and rear sides is arranged so as to hang down at the lower part of the operation handle 11, and a pair of fixed contacts 17 (17Ab, 17Bb) are arranged on the front and rear thereof. ing.
Similar to the structure of the first voltage electrode described above, the movable contact 15 is connected to the neutral electrode terminal 14 b of the third circuit connection terminal 14 via the movable contact 16 b and the flexible conductive wire 18. One fixed contact 17Ab arranged in the front is connected to the neutral electrode terminal 12b of the first circuit connection terminal 12 through the copper bar 7a, and the other fixed contact 17Bb arranged in the rear is connected through the copper bar 7b. The second circuit connection terminal 13 is connected to a neutral electrode terminal 13b (shown in FIG. 2).

FIG. 9 is a cross-sectional view taken along the line CC, showing an internal connection structure of three second voltage electrode terminals 12c, 13c, and 14c. As shown in FIG. 9, a movable contact 16c provided with movable contacts 15 on both front and rear sides is arranged so as to hang down at the lower part of the operation handle 11, and a pair of fixed contacts 17 (17Ac, 17Bc) are arranged on the front and rear thereof. ing.
Similarly to the terminal structure of the first voltage electrode described above, the movable contact 15 is connected to the second voltage electrode terminal 14 c of the third circuit connection terminal 14 via the movable contact 16 c and the flexible conductive wire 18. Also, one fixed contact 17Ac arranged in the front is connected to the second voltage electrode terminal 12c of the first circuit connection terminal 12 via the copper bar 7a, and the other fixed contact 17Bc arranged in the rear is connected to the copper bar 7b. To the second voltage electrode terminal 13c (shown in FIG. 2) of the second circuit connection terminal 13.

The switching opening / closing unit 4 configured in this way is switched as follows. The movable contact 16 is configured to rotate back and forth by the operation of the operation handle 11, and tilts the operation handle 11 forward, that is, the handle hook portion 52 rotates forward to tilt the operation handle 11 forward. Then, the movable contact 16 also rotates forward. Further, when the operation handle 11 is tilted rearward, that is, when the handle hook portion 52 is rotated rearward and the operation handle 11 is tilted rearward, the movable contact 16 is also rotated rearward. Thus, the movable contact 15 is selectively connected to one fixed contact 17.
For example, when the operation handle 11 is tilted to the right (front) shown in FIG. 4, the movable contact 5 comes into contact with the front fixed contact 17 </ b> A and the first circuit connection terminal 12 and the third circuit connection terminal 14 are connected. Is done. FIG. 10 is a cross-sectional view taken along the line C-C in this connected state, that is, a state in which the operation handle 11 is tilted forward.

The control circuit 61 controls the motor 53 and operates the operation handle 11 for the switching opening / closing unit 4 configured as described above to perform the switching operation of the power source. Specifically, as long as the commercial power supply circuit is energized, a voltage detection signal is output from the commercial power supply voltage sensor 63b to the control circuit 61. The control circuit 61 recognizes the energization, and the third circuit connection of the switching opening / closing unit 4 The connection of the terminal 14 to the first circuit connection terminal 12 is continued. Then, when the commercial power supply voltage sensor 63 b detects a power failure, the third circuit connection terminal 14 is connected to the second circuit connection terminal 13. Thereafter, when the commercial power supply voltage sensor 63b detects the voltage of the commercial power supply, that is, when power recovery is detected, the connection of the third circuit connection terminal 14 is returned to the first circuit connection terminal 12.
In this control, the connection between the commercial power supply circuit, the connection with the storage battery system circuit, and the neutral state not connected to any circuit are determined by receiving signals from the three photo interrupters 58. Judgment is made.

  Further, the control circuit 61 determines from the signal of the engagement / disengagement sensor 57 whether the handle hook portion 52 has been detached from the operation handle 11 or the state in which the handle hook portion 52 has been disengaged from the operation handle due to standing operation. The handle hook 52 is returned to the neutral position and the control is stopped.

As described above, since the controlled operation angle of the handle hook portion 52, that is, the tilt angle of the operation handle 11 is detected and controlled, it is possible to reliably perform the control for switching by operating the operation handle 11. On the other hand, since the switching opening / closing unit 4 has the operation handle 11, it can be operated manually, and can be easily switched regardless of power failure / recovery, which is convenient.
Further, since the operation handle 11 is operated by engaging the handle hook portion 52, it can be automated without greatly changing a conventional manually operated switching switch, and can be automated at a low cost.
Furthermore, when the handle hook portion 52 is detached or when the handle hook portion 52 is removed, the handle hook portion 52 is moved to the off position of the operation handle 11, so that the switching opening / closing portion 4 is always attached to the operation handle 11. Can be implemented in the off state and easy to install. Further, since the control is stopped when the handle hook portion 52 is detached from the operation handle 11, malfunction can be prevented.
In addition, since the switching opening / closing part 4 is formed by a dedicated housing, if the switching drive control part 5 assembled with the switching drive part 50 and the circuit housing part 55 is removed, it can be used as a manual switching switch. / Manual switching device can be manufactured at low cost.

  In the above embodiment, switching of the single-phase three-wire electric circuit has been described. However, the automatic power supply switching device 1 can also be applied to switching of the three-phase three-wire electric circuit. Moreover, although the distributed power source has been described as a storage battery, a fuel cell or the like may be used.

  1 .... Automatic power switching device, 2 .... Branch breaker, 3 .... Earth leakage breaker, 4 .... Switch opening / closing part, 5 .... Switch drive control part, 10..Housing, 10a..11..Operation handle, 12. ..First circuit connection terminal, 13 .... Second circuit connection terminal, 14 .... Third circuit connection terminal, 15 .... Moveable contact, 16 .... Moveable contact, 17 .... Fixed contact, 21..Primary side Terminal, 33 .. Secondary side terminal, 50 .. Switching drive part, 51 .. Base, 52 .. Handle hook part, 53 .. Motor, 54 .. Transmission mechanism part, 55 .. Circuit housing part, 57 .. Engagement / disengagement sensor (engagement / disengagement detection means), 58..Photo interrupter (angle detection means) 61..Control circuit (control unit), 62..Power supply circuit, 63a..Circuit open / close switch, 63b..Commercial power supply Voltage sensor, 64a ... Circuit open / close switch, 64b ... Battery power supply voltage sensor.

Claims (5)

A switching opening / closing unit that switches a power source of a load between a commercial power source and a distributed power source, a switching driving unit that drives switching, and a control unit that monitors a power failure / recovery of the commercial power source and controls the switching driving unit A power supply automatic switching device that switches the power supply of the load to a distributed power supply when a power failure occurs in the commercial power supply, and switches to the commercial power supply when the power is restored,
A circuit open / close switch and a voltage sensor are provided on both the power supply line from the commercial power supply circuit and the power supply line from the distributed power supply circuit for the power supply circuit of the control unit,
The control unit opens the circuit open / close switch on the distributed power supply side when detecting a voltage from the both voltage sensors, and closes the circuit open / close switch on the commercial power supply circuit side,
Furthermore, the automatic power switching device is characterized in that it operates to a neutral position where no switching opening / closing part is connected. While the switching opening and closing unit has an operation handle for manually switching power,
The switching drive unit has a handle hook unit that engages with the operation handle and operates the operation handle to switch the power source,
The power supply automatic switching device according to claim 1, wherein the control unit switches the power supply by controlling the operation handle. The switching opening and closing unit has a first circuit connection terminal to which a commercial power supply is connected, a second circuit connection terminal to which a distributed power supply is connected, and a third circuit connection terminal to which a load is connected,
The said 2nd circuit connection terminal and the said 3rd circuit connection terminal are copper bar type | mold terminals which enable the connection of the plug-in-type terminal of a branch breaker or an earth leakage breaker, The Claim 1 or 2 characterized by the above-mentioned. Automatic power switching device. The switching opening / closing unit is assembled to a housing separable from the switching driving unit and the control unit,
The operation handle is arranged on the upper surface of the housing, the first circuit connection terminal on the front side, the second circuit connection terminal and the third circuit connection terminal on the back side,
4. The automatic power supply switching device according to claim 3, wherein the switching drive unit and the control unit are assembled to a side portion of the housing.   5. The automatic power supply switching device according to claim 4, wherein the handle hook portion, the switching drive portion, and the control portion are integrally formed and are detachably assembled to the housing.

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