JP5557031B2 - Automatic connection device - Google Patents

Description

The present invention relates to an watt-hour meter, and more particularly, to an automatic connection device for electrically connecting a watt-hour meter and a test device in order to perform a performance test by connecting an electronic watt-hour meter to the test device.

Traditionally, watt-hour meters that measure current and voltage and integrate and measure power are installed in each household, store, and factory, and are important in calculating the charges for power supplied by power companies. Have a role to play. Therefore, the watt-hour meter must operate accurately and satisfy a predetermined standard, and a performance test (hereinafter simply referred to as “test”) is performed to inspect whether the predetermined standard is satisfied. .

In order to perform this test, it is necessary to connect the connecting wire on the power source side of the test apparatus and each external terminal of the watt hour meter for each watt hour meter to be measured. In this case, the connection conductor on the power source side of the test apparatus and each external terminal of the watt hour meter are connected to each other via, for example, a connector provided on the verification test table.

Patent Document 1 discloses a technique related to such a wire connection device. However, the wire connection device disclosed in Patent Document 1 is fitted into a cylindrical terminal provided in a watt hour meter, and a tip portion is axially disposed. A current terminal having a split groove to be divided is provided, and a tube inserted to the position reaching the split groove is disposed inside the current terminal, and the compressed gas is supplied to the tube so that the tube expands. The automatic connection device is configured such that the current terminal and the cylindrical terminal come into contact with each other and the connection to the watt hour meter is performed by expanding the tip of the current terminal. Further, the automatic wire connector holds the current terminal and includes an insulating block that can slide to the left and right to position the current terminal according to the position of the cylindrical terminal of the watt-hour meter. Is possible.

JP 2001-235527 A

However, the technique described in Patent Document 1 is used for an inductive watt-hour meter in which a rotating disk that can be seen inside a conventional household is often seen, and has recently become popular. Can not be used. In addition, a tube for contacting the tip of the current terminal and the cylindrical terminal of the watt hour meter must be disposed inside the current terminal, which is problematic in terms of work cost.

2. Description of the Related Art In recent years, electronic watt-hour meters that can measure by time zone and can capture the amount of power in a remote place in real time by communication with a remote place have begun to spread. This electronic watt-hour meter has various shapes depending on the rating of the watt-hour meter and the electric power company, and the shapes of current terminals and voltage terminals for connection to the outside are also different. Among electronic watt-hour meters, tests are performed on electronic watt-hour meters that have a movable terminal that moves up and down like a push switch when the external connection current terminal is a flat terminal and the external connection voltage terminal is pressed. Therefore, the connecting wire on the power supply side of the test equipment and the external connection current terminal and external connection voltage terminal of the electronic watt-hour meter are automatically connected, and the electrical resistance of the connection part is reduced to reduce the heat generation amount. Until now, there has never been an automatic connection device that is configured to be reduced.

The present invention is an electronic watt-hour meter that can be manufactured at low cost and has a movable terminal that moves up and down like a push switch when the current terminal for external connection is a flat terminal and the voltage terminal for external connection is pressed. For this purpose, the connecting wire on the power supply side of the test equipment and the external connection current terminal and external connection voltage terminal of the electronic watt-hour meter are automatically connected, and the electrical resistance of the connection portion is reduced to generate heat. An object of the present invention is to provide an automatic connection device capable of reducing the amount.

An automatic connection device according to the present invention for solving the above problems is as follows.
An automatic connection device for electrically connecting a watt hour meter including a current terminal and a voltage terminal and a test device for supplying power to the watt hour meter for performance testing,
An watt-hour installation unit in which the watt-hour meter is installed;
A first current terminal contact portion in contact with one surface of the current terminal;
An insulating block provided at a position facing the first current terminal contact portion;
A second current terminal contact portion attached to the insulating block and in contact with the other surface of the current terminal;
A voltage terminal contact portion attached to the insulating block and in contact with the voltage terminal;
A lifting control mechanism for moving the first current terminal contact portion up and down;
A watt-hour locking mechanism for locking the watt-hour meter to the watt-hour installation section,
When the watt hour meter is installed in the watt hour meter installation unit,
The current terminal of the watt-hour meter is located between the first and second current terminal contact portions, and when the lifting control mechanism lowers the first current terminal contact portion, The second current terminal contact portion sandwiches the current terminal,
The voltage terminal of the watt hour meter is pushed into the watt hour meter when contacting the voltage terminal contact portion.

Moreover, the automatic connection device according to the present invention is a watt-hour meter installation determination sensor that determines whether or not the watt-hour meter is installed in the watt-hour meter installation unit,
When the information indicating that the watt hour meter is installed in the watt hour meter installation unit is received from the watt hour meter installation determination sensor, the lift control mechanism is set as a drivable state, and after the test is completed, Information indicating that the watt-hour meter has been removed from the watt-hour meter installation section from the watt-hour meter installation determination sensor by controlling the raising and lowering of the elevation control mechanism and the lowering of the watt hour meter locking mechanism in conjunction with each other. It is preferable to further include a calculation unit that performs control to raise the watt-hour locking mechanism when the power meter is received.

According to the present invention, since the structure is simple, it can be manufactured at low cost, and the external connection current terminal is a flat terminal, and when the external connection voltage terminal is pressed, the movable terminal moves up and down like a push switch. In order to perform a test of an electronic watt-hour meter equipped with a power supply-side connection lead wire of the test apparatus, an external connection current terminal and an external connection voltage terminal of the electronic watt-hour meter, and It is possible to provide an automatic connection device that can reduce the electrical resistance of the connecting portion and suppress the amount of heat generation.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. However, the present invention can be implemented in many different modes and should not be construed as being limited to the description of the embodiments described below.

First, an outline of an electronic watt-hour meter electrically connected to a test apparatus by an automatic connection device according to an embodiment of the present invention will be described with reference to FIGS. 1 is a front view of the electronic wattmeter, FIG. 2 is a bottom view of the electronic watthour meter, and FIG. 3A is a right side view of the electronic watthour meter. FIG. 3B is an enlarged view of the inside of the lower right portion of FIG. 3A, and shows a current terminal 1100 and a voltage terminal 1200.

As shown in FIG. 2, the electronic watt-hour meter 1000 has two fixing brackets 1400 and four currents used when the electronic watt-hour meter 1000 is provided on the bottom surface of a building, house, or the like. As shown in FIG. 1, a terminal 1100, three voltage terminals 1200, and a pulse with a predetermined period according to the amount of power measured by the watt-hour meter 1000 at the time of the test at a predetermined position in the front (upper center in FIG. 1) And a light-emitting unit 1300 that emits light (for example, infrared rays).

The four current terminals 1100 are flat and are provided with a semi-circular hole for a round screw at a substantially center so that the current terminal 1100 can be fixed with a screw. In this document, as shown in FIG. 3B, for the sake of convenience, for the current terminal 1100, one surface (digital display surface side) is marked with 1110, and the other surface (voltage terminal side) is 1120. Add a sign. Moreover, the voltage terminal 1200 shown in FIG.3 (b) is provided with the mechanism which moves, if it pushes in the direction of the arrow shown in a figure like the push switch, and is pushed into the inside of the electronic watt-hour meter 1000. Yes.

Next, an automatic connection device according to an embodiment of the present invention will be described with reference to FIGS. 4 is a side view of the automatic wire connection device, FIG. 5 is a front view of the automatic wire connection device, FIG. 6 is an arrow view of the automatic wire connection device taken along line AA shown in FIG. 4, and FIG. It is a figure which shows a mode before and after a quantity meter is set to an automatic connection apparatus.

As shown in FIG.4 and FIG.5, the automatic connection apparatus 10 which concerns on this embodiment is the watt-hour meter installation part 100, the 1st current terminal contact part 200, the 2nd current terminal contact part 210, and the voltage terminal contact part. 300, a lift control mechanism 400, a watt hour meter installation determination sensor 500, and a watt hour meter locking mechanism 600.

The watt hour meter installation unit 100 is an area on the substrate 700 where the electronic watt hour meter 1000 is installed at the time of the test, and is indicated by hatching in FIG. In the present embodiment, a rubber mat that causes friction at the contact portion is used so that the electronic watt-hour meter 1000 can be firmly fixed to the installation position during the test.

The first current terminal contact portion 200 is a conductive member that comes into contact with one surface 1110 of the current terminal 1100 of the electronic watt hour meter 1000 installed in the watt hour meter installation portion 100 during the test. In addition, the first current terminal contact portion 200 is connected to the power supply side (not shown) of the test apparatus via a conducting wire 220a. Through the first current terminal contact portion 200, a current flows from the test apparatus to the electronic watt-hour meter 1000.

The first current terminal contact portion 200 is installed to face a second current terminal contact portion 210 described later (that is, when the electronic watt-hour meter 1000 is installed in the watt-hour installation portion 100, It also faces one surface 1110 of the current terminal 1100). The first current terminal contact portion 200 is attached to a lift control mechanism 400 described later, and is lowered as the lift control mechanism 400 is lowered.

The shape of the first current terminal contact portion 200 is not particularly limited as long as it can contact the current terminal 1100 of the electronic watt-hour meter 1000. However, in consideration of the fact that the current terminal 1100 is a flat terminal, the first current terminal contact portion can be widened so that the contact area of the first current terminal contact portion 200 with the current terminal 1100 can be wide. The contact portion on the 200 side is preferably a flat surface. Therefore, in the present embodiment, the first current terminal contact portion 200 is a plate-like member.

The second current terminal contact part 210 is the other surface 1120 of the current terminal 1100 of the electronic watt-hour meter 1000 installed in the watt-hour installation unit 100 during the test (the first of the surfaces of the current terminal 1100 has the first This is a conductive member that comes into contact with the current terminal contact portion 200 and a surface facing one surface 1110. In addition, the second current terminal contact portion 210 is connected to the power supply side (not shown) of the test apparatus via the conducting wire 220b. Similarly to the first current terminal contact portion 200, a current flows from the test apparatus to the electronic watt-hour meter 1000 through the second current terminal contact portion 210.

As shown in FIGS. 4 and 6, the second current terminal contact portion 210 is at a position facing the first current terminal contact portion 200, and the electronic watt-hour meter 1000 is the watt-hour installation portion 100. When installed in the insulation block 710, the insulation block 710 is installed at a position in contact with the bottom surface. More specifically, the insulating block 710 is attached on the surface facing the first current terminal contact portion 200.

The shape of the second current terminal contact portion 210 is not particularly limited as long as it can contact the current terminal 1100 of the electronic watt-hour meter 1000. However, in consideration of the fact that the current terminal 1100 is a flat terminal, it is preferable that the current terminal 1100 is a flat surface like the first current terminal contact portion 200. Therefore, in the present embodiment, the second current terminal contact portion 210 is a plate-like member.

The voltage terminal contact part 300 is a conductive member that comes into contact with the voltage terminal 1200 of the electronic watt-hour meter 1000 installed in the watt-hour installation part 100 during the test. Moreover, the voltage terminal contact part 300 is connected to the power supply side of the test apparatus via a conducting wire 330 (not shown). A voltage is applied to the electronic watt-hour meter 1000 from the test apparatus through the voltage terminal contact portion 300.

In order to enable the voltage terminal contact part 300 to come into contact with the voltage terminal 1200 of the electronic watt hour meter 1000 installed in the watt hour meter installation part 100, in this embodiment, as shown in FIGS. (In FIGS. 4 and 5, the voltage terminal contact portion 300 is installed adjacent to the first current terminal contact portion 200 in order to make the automatic connection device 10 compact. Not limited to.)

In this embodiment, the voltage terminal contact portion 300 is disposed on the surface of the insulating block 710 that contacts the bottom surface of the electronic watt-hour meter 1000, and the terminal contact portion 310 that contacts the voltage terminal 1200. A conductor connecting portion 320 is provided on the surface facing one current terminal contact portion 200 and is connected to the conductor 330.

Thus, by attaching the voltage terminal contact portion 300 to the insulating block 710, when the electronic watt-hour meter 1000 is installed in the watt-hour installation portion 100, the voltage terminal 1200 abuts on the terminal contact portion 310. The electric watt-hour meter 1000 is pushed inside. In addition, the shape of the voltage terminal contact part 300 is not specifically limited, As shown in FIG. 6, the shape where the conducting wire connection part 320 extends from either the left or right end of the terminal contact part 310 (L-shaped) Alternatively, the conductor connecting portion 320 may have a shape (T-shaped) extending from the center of the terminal contact portion 310.

The elevation control mechanism 400 has a first current terminal contact portion 200 attached to a predetermined position thereof, and moves the first current terminal contact portion 200 up and down by moving the piston by the action of the air cylinder 430 described below. It is. In addition, the raising / lowering control mechanism 400 is arrange | positioned under the watt-hour installation part 100 (further below the insulation block 710), as shown in FIG.4 and FIG.5.

The raising / lowering control mechanism 400 has an attachment portion 410 for attaching and fixing the first current terminal contact portion 200, a support shaft 420 for supporting the attachment portion 410, and at least two air ports, and is an electromagnetic valve (not shown). When air is supplied from one of the air ports by switching, the air is exhausted from the other air port and includes an air cylinder 430 that moves the internal piston portion 440. The support shaft 420 and the piston portion 440 are screwed together. It is the structure which connects by being fastened. (As shown in FIG. 6, the support shaft 420 and the piston portion 440 may be connected via the cylinder head 450.) As shown in FIG. 4 and FIG. The shaft 420 is inserted into the substrate 700, and the whole is erected substantially perpendicular to the substrate 700.

The raising / lowering control mechanism 400 raises / lowers the piston part 440 and the support shaft 420 connected thereto by the action of the air cylinder 430. Accordingly, the first current terminal contact portion 200 moves in the same direction as the operations of the piston portion 440 and the support shaft 420, and the contact between the current terminal 1100 of the electronic watt-hour meter 1000 and the first current terminal contact portion 200 is achieved. Alternatively, the separation control is performed.

Details of the electrical connection between the automatic connection device 10 according to the present embodiment and the current terminal 1100 and the voltage terminal 1200 of the electronic watt-hour meter 1000 are as follows. FIG. 7A is a diagram showing a state immediately before the electronic watt-hour meter 1000 is set in the automatic wiring device 10. Thereafter, as shown in FIG. 7B, the electronic watt-hour meter 1000 moves, the voltage terminal 1200 comes into contact with the voltage terminal contact portion 300 attached to the insulating block 710, and the electronic watt-hour meter 1000 (At this time, the electronic watt-hour meter 1000 is locked by the following watt-hour locking mechanism 600 and fixed at a predetermined position in the watt-hour installation section 100).

On the other hand, in this state, the current terminal 1100 is positioned between the first current terminal contact portion 200 in the descending standby state and the second current terminal contact portion 210 attached to the insulating block 710. Then, by turning on a switch (not shown) of the elevation control mechanism 400, the first current terminal contact portion 200 is lowered as the support shaft 420 of the elevation control mechanism 400 is lowered, and the current terminal 1100 is And the second current terminal contact portions 200 and 210 (that is, the first current terminal contact portion 200 comes into contact with one surface 1110 of the current terminal 1100, and the second current terminal contact portion 200 210 is in contact with the other surface 1120 of the current terminal 1100).

Thus, the first current terminal contact portion 200 is in contact with one surface 1110 of the current terminal 1100, and the second current terminal contact portion 210 is in contact with the other surface 1120 of the current terminal 1100. The area of the contact portion can be widened, and the electrical resistance and the amount of heat generated can be kept low.

As shown in FIG. 5, the automatic connection device 10 includes a watt-hour installation determination sensor 500 that determines whether or not an electronic watt-hour meter 1000 is installed inside the watt-hour installation section 100. Is preferred. The configuration of the watt-hour meter installation determination sensor 500 includes, for example, a light emitting unit and a light receiving unit. Also, whether or not the electronic watt-hour meter 1000 is installed is determined by the electronic watt-hour meter 1000 installed in the watt-hour installation section 100 blocking the light from the light emitting section and reflecting the reflected light. When the light receiving unit receives, it is determined that the electronic watt-hour meter 1000 is installed in the watt hour meter installation unit 100. Conversely, when the light receiving unit does not receive light from the light emitting unit, It is determined that the electric energy meter 1000 is not installed in the energy meter installation unit 100.

If the watt-hour meter installation determination sensor 500 is configured so that the elevation control mechanism 400 is not driven unless the electronic watt-hour meter 1000 is installed in the watt-hour meter installation unit 100, Although it is not installed in the meter installation unit 100, it is possible to prevent the elevation control mechanism 400 from operating.

The watt-hour locking mechanism 600 is a mechanism for locking the electronic watt-hour meter 1000 installed in the watt-hour installation unit 100 at that position. Specifically, as shown in FIGS. 4 and 7, a locking portion 610 that contacts and locks the upper surface of the electronic watt-hour meter 1000, and a piston portion 620 that moves the locking portion 610 up and down inside. And an air cylinder 630 having the structure. Further, it is preferable to dispose an elastic body 640 (coil spring in this embodiment) between the locking portion 610 and the piston portion 620. 4 and 6, a cylinder head 650 may be interposed between the elastic body 640 and the piston portion 620. The watt-hour locking mechanism 600 is disposed substantially parallel to the elevation control mechanism 400 on the upper side of the watt-hour installation section 100 with a distance of at least the height of the electronic watt-hour meter 1000.

As shown in FIG. 7A, when the electronic watt-hour meter 1000 immediately before being set in the automatic wire connection device 10 comes into contact with the locking portion 610, the watt-hour locking mechanism 600 causes the elastic body 640 to have a spring force. And the locking portion 610 is pushed inside the substrate 700. Thereafter, when the electronic watt-hour meter 1000 moves to the position shown in FIG. 7B, the spring force is released, the elastic body 640 extends, and the locking portion 610 returns to the original position.

On the other hand, when the test is completed, the locking portion 610 is lowered along with the piston portion 620 by the action of the air cylinder 630. Thereby, the support (locking part 610) which has locked electronic watt-hour meter 1000 until now is lost, and electronic watt-hour meter 1000 can be removed from automatic connection device 10.

Note that the automatic wire connection device 10 may be configured to link the operation of the elevation control mechanism 400 described above with the operation of the watt-hour locking mechanism 600. The operation of the automatic connection device 10 in this case will be described with reference to the flowchart of FIG.

First, when the tester installs the electronic watt-hour meter 1000 in the watt-hour meter installation unit 100 (S101), the watt-hour meter installation determination sensor 500 determines whether or not the electronic watt-hour meter 1000 is installed. When it is determined that the electronic watt-hour meter 1000 is in the installed state, the information is sent to a calculation unit (not shown) of the automatic connection device 10 such as a microcomputer, and the calculation unit can drive the elevation control mechanism 400. The state is set (S102). Thereafter, when the switch of the lifting control mechanism 400 is pushed by a tester's manual operation or the like (S103), the driving of the lifting control mechanism 400 set in the drivable state is started, and the first current terminal contact portion 200 is driven. Due to the descent and contact with the current terminal 1100, the electronic watt-hour meter 1000 and the test device are electrically connected through the automatic connection device 10, and voltage and current are supplied from the test device which is not described, and the test is performed. The process is started (S104).

When the test is completed, the switch of the lift control mechanism 400 is pushed again by the tester's manual operation or the like (S105), the lift control mechanism 400 and the first current terminal contact portion 200 are lifted (S106), and the watt hour meter The locking mechanism 600 is driven and the locking portion 610 is lowered (S107). Finally, when the electronic watt-hour meter 1000 is removed from the watt-hour meter installation unit 100, the watt-hour meter installation determination sensor 500 determines that (S108), and the watt-hour locking mechanism 600 is driven again, This time, the locking portion 610 is raised (S109).

Next, in the automatic connection device 10, the electric power meter 1000 further uses a pulsed light beam (for example, infrared rays) emitted by the electronic watt-hour meter 1000 according to the measurement of a predetermined power amount. An automatic connection device capable of measuring the amount of electric power supplied to the electronic watt-hour meter 1000 at the time of the test by a method other than visually recognizing the amount display meter will be described with reference to FIG.

FIG. 9 is a front view of the automatic connection device 10. The electronic watt-hour meter 1000 includes a circuit that outputs a pulse in accordance with a predetermined amount of electric power. This pulse signal is converted into light and emitted from the light emitting unit 1300 shown in FIG. Reference numeral 900 shown in FIG. 9 is a pulse light receiving mechanism for receiving the pulse light.

The configuration of the pulsed light receiving mechanism 900 includes a light receiving arm 910 and a light receiving arm rotation control unit 920 that controls the light receiving arm 910 to be rotatable around a shaft portion 911 of the light receiving arm 910. In addition, the light receiving arm 910 includes a light receiving element 912 that receives light from the light emitting unit 1300 at the end 910A. Specifically, the light receiving arm rotation control unit 920 (for example, an air actuator) acts to rotate the shaft portion 911 of the light receiving arm 910, and the light receiving arm 910 rotates accordingly.

In the present embodiment, the pulse light receiving mechanism 900 further includes a light receiving arm mounting portion 930 having a substantially rectangular parallelepiped shape that is erected vertically on the substrate 700. The light receiving arm 910 is attached to the upper surface 930A of the light receiving arm attachment portion 930 in a state where the shaft portion 911 is rotatably supported. The light receiving arm mounting portion 930 erected on the substrate 700 has an upper surface 930 </ b> A that comes in front of the upper surface of the electronic watt-hour meter 1000 installed in the watt hour meter installation unit 100 (front side in FIG. 9). Has a height.

By doing so, the light receiving arm 910 rotates in the space in front of the electronic watt-hour meter 1000 installed in the watt-hour installation section 100 (in FIG. 9, the front side of the electronic watt-hour meter 1000). Can do.

When the light receiving arm 910 rotates by the action of the light receiving arm rotation control unit 920, the light receiving element 912 attached to the end 910A moves to a position directly facing the light emitting unit 1300 of the electronic watt-hour meter 1000. . Thereby, the light receiving element 912 can receive the light beam from the light emitting unit 1300.

Note that the pulse light receiving mechanism 900 may include a receiving unit that receives data of the received pulse beam and a calculation unit that measures the amount of power measured by the electronic watt-hour meter 1000 from the received data (described above). It may be the same as or different from the calculation unit.) If this arithmetic unit has a function of instructing to rotate the light receiving arm 910 in accordance with a predetermined sequence during the test, the arithmetic unit also functions as the light receiving arm control unit 920.

As a result, the tester can measure the amount of power supplied to the electronic watt-hour meter 1000 by a method other than visually recognizing the power amount display meter of the electronic watt-hour meter 1000. It can be performed. In FIG. 9, the pulse light receiving mechanism 900 is erected on the substrate 700 and on the right side of the watt hour meter installation unit 100, but the erection position is not limited to this.

The front view of the electronic wattmeter 1000. FIG. The bottom view of the electronic wattmeter 1000. FIG. The right view of the electronic wattmeter 1000. FIG. The side view of the automatic connection apparatus which concerns on one Embodiment of this invention. 1 is a front view of an automatic connection device according to an embodiment of the present invention. 4A-A arrow view of the automatic connection device according to the embodiment of the present invention. The figure which shows a mode before and after the electronic watt-hour meter which concerns on one Embodiment of this invention is set to an automatic connection apparatus. The operation | movement flowchart of the automatic connection apparatus which concerns on one Embodiment of this invention. The front view of the automatic connection apparatus which concerns on one Embodiment of this invention provided with a pulsed light receiving mechanism.

DESCRIPTION OF SYMBOLS 10 Automatic connection apparatus 100 Electricity meter installation part 200 1st electric current terminal contact part 210 2nd electric current terminal contact part 300 Voltage terminal contact part 400 Elevation control mechanism 500 Electricity meter installation determination sensor 600 Electricity meter latching mechanism 700 Substrate 710 Insulating block 910 Light receiving arm 1000 Electronic watt-hour meter

Claims (3)

An automatic connection device for electrically connecting a watt hour meter including a current terminal and a voltage terminal and a test device for supplying power to the watt hour meter for performance testing,
An watt-hour installation unit in which the watt-hour meter is installed;
A first current terminal contact portion in contact with one surface of the current terminal;
An insulating block provided at a position facing the first current terminal contact portion;
A second current terminal contact portion attached to the insulating block and in contact with the other surface of the current terminal;
A voltage terminal contact portion attached to the insulating block and in contact with the voltage terminal;
A lifting control mechanism for moving the first current terminal contact portion up and down;
A watt-hour locking mechanism for locking the watt-hour meter to the watt-hour installation section,
When the watt hour meter is installed in the watt hour meter installation unit,
The current terminal of the watt-hour meter is located between the first and second current terminal contact portions, and when the lifting control mechanism lowers the first current terminal contact portion, The second current terminal contact portion sandwiches the current terminal,
The automatic connection device according to claim 1, wherein the voltage terminal of the watt-hour meter is pushed into the watt-hour meter when contacting the voltage terminal contact portion. A watt-hour meter installation determination sensor that determines whether or not the watt-hour meter is installed in the watt-hour meter installation unit;
When the information indicating that the watt hour meter is installed in the watt hour meter installation unit is received from the watt hour meter installation determination sensor, the lift control mechanism is set as a drivable state, and after the test is completed, Information indicating that the watt-hour meter has been removed from the watt-hour meter installation section from the watt-hour meter installation determination sensor by controlling the raising and lowering of the elevation control mechanism and the lowering of the watt hour meter locking mechanism in conjunction with each other. The automatic connection device according to claim 1, further comprising: an arithmetic unit that performs control to raise the watt-hour locking mechanism when the power meter is received. A pulse light receiving mechanism that includes a light receiving arm and a light receiving arm rotation control unit that rotates the light receiving arm and rotates the light receiving arm around the shaft,
At the end of the light receiving arm, a light receiving element that is provided in the watt hour meter and receives a light beam from a light emitting unit that emits a light beam according to the electric energy measured by the watt hour meter is provided,
Under the control of the light receiving arm rotation control unit, the light receiving arm rotates in front of the watt hour meter installed in the watt hour meter installation unit, so that the light receiving element directly contacts the light emitting unit. The automatic wire connection device according to claim 1 or 2, wherein the automatic wire connection device moves to an opposing position.

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