JP2013044556A - Watt-hour meter test device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To attain a reliable continuity test and an insulation resistance test by being capable of efficiently executing the continuity test and the insulation resistance test of a watt-hour meter.SOLUTION: The watt-hour meter test device makes the continuity test and insulation resistance test of a watt-hour meter 1 executable by connecting test terminals 24 freely detachably to connection terminals 6S-8S, 6L-8L with respect to the watt-hour meter 1 in which opening holes 15 are formed for respective connection terminals 6S-8S, 6L-8L at a lower end surface of a terminal part 14, in which the connection terminals 6S-8S, 6L-8L are arrayed, provided under a base 5 that is a main body of the watt-hour meter. In this device, the watt-hour meter 1 is placed and a frame 23 inclined with respect to the horizontal direction by a predetermined angle, and a plurality of test terminals 24 disposed under the frame 23 corresponding to the connection terminals 6S-8S, 6L-8L of the watt-hour meter 1 are included. The test terminals 24 are inserted to the opening holes 15 of the terminal part 14 by a self-weight of the watt-hour meter 1 by placing the watt-hour meter 1 on the frame 23 and formed in a rod-like state electrically connected to the connection terminals 6S-8S, 6L-8L.

Description

  The present invention relates to a watt-hour tester for performing a continuity test and an insulation resistance test on various watt-hour meters installed in a power consumer such as a general household or a factory.

  For example, as a watt hour meter that measures and displays the amount of power used by power consumers such as ordinary households, shops, factories, and buildings, the disk rotates according to the amount of power used to indicate the amount of power used There are electronic watt-hour meters equipped with electronic circuits to make it easier to deal with the diversification of mechanical watt-hour meters and electricity trading menus. In addition to these mechanical watt-hour meters and electronic watt-hour meters, unit-type watt-hour meters in which various units including a watt-hour meter unit are assembled on a base having a socket structure are known (for example, patents) Reference 1).

  As shown in FIGS. 13 and 14, this type of unit watt-hour meter 1 includes a communication terminal unit 2, a watt-hour meter unit 3, and a load switching unit 4 that are assembled on an upper part of a metal base 5, A resin-made terminal block 9 having primary side connection terminals 6S to 8S to which lead-in lines from the system are connected and secondary side connection terminals 6L to 8L to which customer side wiring is connected is fixed to the lower part of the base 5. It has a structure.

  In this unit-type watt-hour meter 1, a transparent protective cover 10 that covers the communication terminal unit 2, the watt-hour meter unit 3, and the load switching unit 4 is fastened and fixed to the upper portion of the base 5 with screws 11. Moreover, the terminal part 14 is comprised by attaching the metal terminal cover 12 which coat | covers the primary side connection terminals 6S-8S and the secondary side connection terminals 6L-8L to the terminal block 9 with the screw 13. FIG. A lead-in wire from the power transmission system is connected to the primary side connection terminals 6S to 8S from the opening hole 15 formed in the lower end surface of the terminal block 9 in the terminal part 14, and the customer side wiring is the secondary side connection terminal. Connected to 6L-8L.

JP 2006-170787 A

  By the way, the unit-type watt-hour meter 1 described above generally performs, for example, a continuity test and an insulation resistance test before factory shipment. Conventionally, the continuity test of the unit-type watt-hour meter 1 is performed by, for example, using a tester, where an operator contacts the test pin of the tester with the primary side connection terminals 6S to 8S and the secondary side connection terminals 6L to 8L of the terminal unit 14 By doing so, the presence or absence of conduction between the primary side connection terminals 6S to 8S and the secondary side connection terminals 6L to 8L was confirmed.

  In addition, the insulation resistance test of the unit watt-hour meter 1 also uses the insulation resistance meter so that the operator abuts the test pin of the insulation resistance meter on the secondary side connection terminals 6L to 8L of the terminal portion 14, Whether or not the insulation resistance between the secondary side connection terminals 6L to 8L and the ground is greater than or equal to a predetermined value is confirmed.

  However, in any of the above-described continuity test and insulation resistance test, conventionally, an operator places test pins for the watt-hour meters 1 on the primary side connection terminals 6S to 8S and the secondary side connection terminals 6L to 8L. The work efficiency is poor and the test pins are not easily in contact with the primary side connection terminals 6S to 8S and the secondary side connection terminals 6L to 8L. There was a problem of low reliability.

  Conventionally, in a process in the middle of manufacturing, the operator applies the test pins to the primary side connection terminals 6S to 8S and the secondary side connection terminals 6L to 8L before the terminal cover 12 of the terminal portion 14 is mounted. It was normal to conduct a continuity test and an insulation resistance test by contacting them. However, rather than conducting a continuity test and an insulation resistance test in the middle of the manufacturing process, the continuity test and the insulation resistance test should be performed in a state where the terminal cover 12 of the terminal portion 14 is attached, that is, in the final stage immediately before product shipment. This is the current situation.

  Therefore, the present invention has been proposed in view of the above-mentioned problems, and the object of the present invention is to efficiently conduct a watt-hour meter continuity test and an insulation resistance test, and a highly reliable continuity test. It is another object of the present invention to provide a watt-hour tester capable of realizing an insulation resistance test.

  As technical means for achieving the above-mentioned object, the present invention is provided with a terminal portion in which a plurality of connection terminals are arranged at the lower part of the watt hour meter body, and an opening for each connection terminal is provided at the lower end surface of the terminal portion. A watt-hour meter testing device capable of conducting a continuity test and an insulation resistance test of a watt-hour meter by detachably connecting a test terminal to a connection terminal with respect to a watt-hour meter having a hole, The meter is mounted, and includes a gantry inclined at a predetermined angle with respect to the horizontal direction, and a plurality of test terminals arranged in correspondence with the connection terminals of the watt hour meter at the lower part of the gantry. The terminal is characterized in that a watt hour meter is placed on a pedestal so that it is inserted into the opening hole of the terminal portion by its own weight and is electrically connected to the connection terminal.

  In the present invention, the watt-hour meter is automatically moved downward on the gantry with its own weight only by placing the watt-hour meter on the gantry inclined at a predetermined angle with respect to the horizontal direction. A rod-like test terminal disposed in the lower part of the wattmeter is smoothly inserted into the opening hole of the terminal part of the watt-hour meter and is reliably and easily connected to the connection terminal of the terminal part. Thus, since the setting of the watt hour meter to the test terminal can be easily performed, the continuity test and the insulation resistance test of the watt hour meter can be started quickly.

  It is desirable that the test terminal in the present invention is detachably attached to the gantry, and a plurality of types of test terminals corresponding to the types of watt-hour meters having different numbers of connection terminals and different arrangement pitches are detachable from the gantry. In this way, the test corresponding to the watt hour meter for conducting the continuity test and the insulation resistance test from among the plural types of test terminals corresponding to the types of the watt hour meter having different numbers and arrangement pitches of the connection terminals. Terminals can be selected and mounted on the gantry, and varieties of watt-hour meters can be quickly and easily handled.

  In the present invention, a structure in which a ground terminal that is electrically connected to the conductive portion of the watt hour meter body is disposed on the side of the gantry is desirable. In this way, when the insulation resistance test of the watt hour meter is performed, the watt hour meter can be easily grounded by the ground terminal, and the insulation resistance test can be performed smoothly.

  The test terminal according to the present invention includes a relay for continuity test that enables the continuity test by closing the contact during the continuity test of the watt hour meter, and an insulation resistance test by closing the contact during the insulation resistance test of the watt hour meter. It is desirable to have a structure connected to an insulation resistance test relay that can implement the above. In this way, the continuity test and the insulation resistance test can be selected quickly and easily by switching between the continuity test relay and the insulation resistance test relay.

  According to the present invention, by simply placing the watt hour meter on the pedestal inclined by a predetermined angle with respect to the horizontal direction, the watt hour meter is automatically moved downward on the gantry with its own weight, A rod-like test terminal arranged at the lower part of the pedestal is smoothly inserted into the opening hole of the terminal part of the watt-hour meter, and is reliably and easily connected to the connection terminal of the terminal part. Thus, since the setting of the watt hour meter to the test terminal can be easily performed, the continuity test and the insulation resistance test of the watt hour meter can be started quickly. As a result, the working efficiency and reliability in the continuity test and insulation resistance test of the watt-hour meter can be greatly improved, and its practical value is great.

In the embodiment of the watt-hour tester according to the present invention, (A) is a front view showing the appearance of the whole tester, and (B) is a side view of (A). (A) is an enlarged front view which shows the mount frame of FIG. 1 (A), (B) is a side view of (A). (A) is a rear view showing the structure of a 60A test terminal, (B) is a plan view of (A), and (C) is a side view of (A). (A) is a front view which shows the mount frame of the state which removed the test terminal, (B) is a side view of (A). (A) is a rear view showing the structure of a test terminal for 30A, (B) is a plan view of (A), and (C) is a side view of (A). (A) is a rear view showing the structure of a test terminal for 120A, (B) is a plan view of (A), and (C) is a side view of (A). (A) is a front view which shows the state which mounted the watt-hour meter on the mount frame of FIG. 2 (A), (B) is a side view of (A). It is an enlarged front view which shows the structure of the ground terminal of FIG. It is a front view which shows the state which connected the ground terminal to the watt-hour meter on a mount. It is a block diagram which shows the circuit structure of a test apparatus. It is a circuit wiring diagram which shows the connection state of the watt-hour meter and ohmmeter in the time of a continuity test. It is a circuit wiring diagram which shows the connection state of the watt-hour meter and an insulation resistance meter at the time of an insulation resistance test. It is an assembly exploded perspective view showing an example of a unit type watt-hour meter. It is an assembly completion perspective view which shows an example of a unit type watt-hour meter.

  An embodiment of a watt-hour meter testing apparatus according to the present invention will be described in detail below. In the following embodiment, a unit watt-hour meter that measures and displays the amount of power used by a power consumer such as a general household, a store, a factory, or a building is exemplified. It can also be applied to mechanical watt-hour meters such as trading instruments for general use and general-purpose meters. In the figure, an AC single-phase three-wire watt-hour meter is illustrated, but the present invention can also be applied to other phase-wire watt-hour meters such as an AC single-phase two-wire type.

  As shown in FIGS. 13 and 14, a unit type watt hour meter 1 (hereinafter simply referred to as a watt hour meter) as a test object of the watt hour meter testing apparatus includes a communication terminal unit 2 and a watt hour meter unit. 3 and the load switching unit 4 are assembled to the upper part of the metal base 5 which is a watt hour meter body, and the primary side connection terminals 6S to 8S (hereinafter simply referred to as connection terminals) to which a lead-in line from the power transmission system is connected. A resin terminal block 9 having secondary side connection terminals 6 </ b> L to 8 </ b> L (hereinafter simply referred to as connection terminals) to which customer side wiring is connected is fixed to the lower portion of the base 5.

  In this watt-hour meter 1, a transparent protective cover 10 that covers the communication terminal unit 2, the watt-hour meter unit 3, and the load switching unit 4 is fastened and fixed to the upper portion of the base 5 with screws 11. Moreover, the terminal part 14 is comprised by attaching the metal terminal cover 12 which coat | covers the connecting terminals 6S-8S and 6L-8L to the terminal block 9 with the screw 13. FIG. A lead-in wire from the power transmission system is connected to the connection terminals 6S to 8S and a customer side wiring is connected to the connection terminals 6L to 8L from the opening hole 15 formed in the lower end surface of the terminal block 9 in the terminal portion 14. Is done.

  Here, the above-described watt-hour meter 1 can perform a continuity test and an insulation resistance test in a state where the terminal cover 12 of the terminal portion 14 is attached to the terminal block 9, that is, in the final stage immediately before product shipment. is there. A watt-hour meter test device (hereinafter simply referred to as a test device) for carrying out the continuity test and the insulation resistance test of the watt-hour meter 1 will be described in detail below.

  1A and 1B show the appearance of the test apparatus. As shown in the figure, this test apparatus is constructed by assembling each component described later on a metal frame-like frame 21, and is movable by providing casters 22 below the frame-like frame 21. It has a portable and simple structure.

  On the upper stage of the frame-like frame 21, a plate-like pedestal 23 on which the watt hour meter 1 as a test object is placed is installed. A plurality of test terminals 24 that are electrically connected to the connection terminals 6S to 8S and 6L to 8L (see FIG. 13) of the terminal unit 14 in the watt hour meter 1 are disposed below the gantry 23. An earth terminal 25 for grounding the base 5 at the time of an insulation resistance test is disposed on the side of the gantry 23. Further, an ohmmeter 26 that measures the resistance value of the circuit during the continuity test and an insulation ohmmeter 27 that measures the insulation resistance value of the circuit during the insulation resistance test are installed in the middle of the frame-shaped frame 21. Further, a controller 28 that controls each component when the continuity test and the insulation resistance test are performed is installed in the lower stage of the frame-shaped frame 21. A display 29 for displaying the results of the continuity test and the insulation resistance test is installed at the top of the frame-shaped frame 21. In addition, a switch 30 for starting a continuity test and an insulation resistance test is provided on the upper side of the frame-shaped frame 21.

  The gantry 23 on which the watt-hour meter 1 is placed is disposed so as to be inclined at a predetermined angle θ (for example, 45 °) [see FIG. 1B] with respect to the horizontal direction. As shown in FIGS. 2 (A) and 2 (B), the plurality of test terminals 24 provided in the lower portion of the pedestal 23 are connected to the connection terminals 6S to 8S formed on the lower end surface of the terminal portion 14 of the watt-hour meter 1. It is inserted into the opening hole 15 for each of 6L to 8L to form a rod shape that is electrically connected to the connection terminals 6S to 8S and 6L to 8L (see FIG. 13). 2A and 2B, the ground terminal 25 is not shown.

  In this way, by simply placing the watt hour meter 1 on the pedestal 23 by tilting the pedestal 23, the watt hour meter 1 is automatically moved downward on the pedestal 23 with its own weight. A rod-like test terminal 24 disposed at the lower portion of the pedestal 23 is smoothly inserted into the opening hole 15 of the terminal portion 14 of the watt hour meter 1 so that the connection terminals 6S to 8S and 6L to 8L of the terminal portion 14 are securely connected. And easily connected. Thus, since setting of the watt-hour meter 1 with respect to the test terminal 24 can be easily performed, the continuity test and the insulation resistance test can be started quickly.

  The test terminal 24 is detachably attached to the gantry 23, and a plurality of types of test terminals 24 corresponding to the types of the watt-hour meters 1 having different numbers and arrangement pitches of the connection terminals 6S to 8S and 6L to 8L are provided on the gantry 23. It is structured to be detachable. Thereby, the electric power which is going to carry out a continuity test and an insulation resistance test from the plural types of test terminals 24 corresponding to the types of the watt-hour meters 1 having different numbers and arrangement pitches of the connection terminals 6S to 8S and 6L to 8L. The test terminal 24 corresponding to the meter 1 can be selected and mounted on the gantry 23, and the variability of the watt-hour meter 1 can be quickly and easily performed.

  3A to 3C are 60A test terminals corresponding to the 60A watt-hour meter. Six test terminals 24 are juxtaposed on the terminal plate 31 at a predetermined arrangement pitch, and the terminal plate 31 is attached to the fixed plate 33 via an L-shaped frame 32. The test terminal 24 is removably attached to the terminal plate 31 in a state of being biased in a direction protruding above the terminal plate 31 by the elastic force of the spring 34 (above the pedestal 23). On the other hand, six contact terminals 36 are removably attached to the protrusions 35 of the fixed plate 33 while being urged in a protruding direction by the elastic force of the spring 37. The test terminals 24 are electrically connected by lead wires 38.

  On the other hand, as shown in FIGS. 4A and 4B, a recess 39 into which the projection 35 of the fixing plate 33 is fitted is provided at the bottom of the pedestal 23. A connection portion 41 is provided in which six contact terminals 40 are disposed so as to correspond to the contact terminals 36 of the fixed plate 33. This contact terminal 40 is also attached so as to be retractable in a state where it is urged in a protruding direction by the elastic force of the spring 42. The lead wire 43 extending from the contact terminal 40 of the gantry 23 is electrically connected to the ohmmeter 26 and the insulation ohmmeter 27 via the controller 28 described above.

  The protrusions 35 of the fixing plate 33 are fitted into the concave portions 39 of the connection portion 41 of the gantry 23, and the fixing plate 33 is fixed by the thumbscrews 44 provided on both sides of the concave portion 39. Thereby, the contact terminal 40 of the connection part 41 and the contact terminal 36 of the fixing plate 33 are electrically connected, and the test terminal 24 of the terminal plate 31 is disposed in a state of facing upward at the lower part of the gantry 23.

  Note that the test terminal 24 shown in FIGS. 2A and 2B and FIGS. 3A to 3C is for 60A, but in addition, 30A shown in FIGS. 5A to 5C. Test terminal 24 and 120A test terminal 24 shown in FIGS. 6 (A) to 6 (C) can be prepared to support 30A watt-hour meter and 120A watt-hour meter. And an insulation resistance test can be performed.

  The 30A test terminal 24 and the 120A test terminal 24 have substantially the same structure as the 60A test terminal 24, and the fixing plate 33 fitted into the recess 39 of the gantry 23 has a structure common to the three types of test terminals 24. The contact terminals 36 having the same size and shape are arranged at the same pitch. What is different from the 60A test terminals 24 is the number of test terminals 24 and the arrangement pitch. The four 30A test terminals 24 and the six 120A test terminals 24 are different in arrangement pitch from the 60A test terminals 24. As described above, the 30A test terminal 24 and the 120A test terminal 24 have the same structure of the fixing plate 33 as the 60A test terminal 24. is there. Hereinafter, the 60A test terminal 24 will be described, and the description of the 30A test terminal 24 and the 120A test terminal 24 will be omitted.

  At the time of the continuity test and the insulation resistance test, as shown in FIGS. 7A and 7B, the gantry 23 is disposed at a predetermined angle θ (for example, 45 °) with respect to the horizontal direction. By simply placing the watt-hour meter 1 on the pedestal 23 and automatically moving the watt-hour meter 1 downward on the pedestal 23 with its own weight, a rod-like shape disposed at the lower part of the pedestal 23 The test terminal 24 is smoothly inserted into the opening hole 15 of the terminal portion 14 of the watt hour meter 1 and is reliably and easily connected to the connection terminals 6S to 8S and 6L to 8L of the terminal portion 14. 7A and 7B, the ground terminal 25 is not shown.

  The ground terminal 25 provided on the side of the above-described gantry 23 has a structure as shown in FIG. The ground terminal 25 is made of a flat conductive member, and a lead wire 45 is connected thereto. The lead wire 45 extending from the ground terminal 25 is electrically connected to the insulation resistance meter 27 via the controller 28.

  On the other hand, the ground terminal 25 is removably attached to the cylinder front end portion 47 in a state where it is urged in a protruding direction by the elastic force of the spring 46. The cylinder body 48 is mounted on a mounting block 49, and the mounting block 49 is mounted on the rod 51 via an arm 50. The rod 51 is fixed to the side portion of the gantry 23 so as to protrude in the horizontal direction.

  The aforementioned arm 50 is attached to the rod 51 by a mounting portion 52, and is slidable in the axial direction with respect to the rod 51 (see arrow A in the figure) and rotatable around the axis (see arrow B in the figure). ). The arm 50 has a structure that can be freely extended and retracted (see the arrow D in the figure) and rotatable (see the arrow D in the figure) by loosening the knob 53 provided on the mounting portion 52. . As a result, the mounting block 49 provided with the ground terminal 25 at the tip has a swingable structure.

  During the insulation resistance test of the watt-hour meter 1, the arm 50 is moved horizontally by the mounting portion 52 with respect to the rod 51 protruding from the side of the pedestal 23, and the arm 50 is expanded and contracted by loosening the knob 53. Then, the mounting block 49 is swung by rotating it while adjusting its length, and by rotating it around the axis with respect to the rod 51. Thereby, the ground terminal 25 at the tip of the mounting block 49 is disposed close to the screw 11 for attaching the protective cover 10 to the base 5 (see the broken line in FIG. 8).

  In this state, the cylinder tip 47 is protruded with air pressure, and the ground terminal 25 is brought into elastic contact with the screw 11 (see FIG. 9). In this way, the watt hour meter 1 can be easily grounded by the ground terminal 25, and the insulation resistance test can be carried out smoothly. Since the surface of the base 5 is usually painted, the ground terminal 25 is brought into contact with the cover fixing screw 11 which is a conductive part.

  FIG. 10 shows a circuit configuration of the test apparatus. As shown in the figure, the controller 28 is connected to a test terminal 24 and a ground terminal 25 provided on the gantry 23, and is connected to a resistance meter 26 for continuity test and an insulation resistance meter 27 for insulation resistance test. Yes. The controller 28 incorporates a continuity test relay 54 and an insulation resistance test relay 55, which will be described later. The test terminal 24 includes the continuity test relay 54 and the insulation resistance test relay 55 of the controller 28. The earth terminal 25 is connected to the insulation resistance meter 27 via the insulation resistance test relay 55 of the controller 28. Further, the controller 28 is connected to a display 29 provided on the frame-like frame 21.

  As shown in FIG. 11, the continuity test relay 54 closes the contacts 56a to 56d during the continuity test of the watt-hour meter 1 so that the continuity test can be performed. The insulation resistance test relay 55 is shown in FIG. As described above, the insulation resistance test can be performed by closing the contacts 57a to 57d during the insulation resistance test of the watt-hour meter 1. By closing the contacts 56a to 56d of the continuity test relay 54 and opening the contacts 57a to 57d of the insulation resistance test relay 55, a continuity test can be performed. By closing the contacts 57a to 57d and opening the contacts 56a to 56d of the continuity test relay 54, an insulation resistance test can be performed. Thus, by switching between the continuity test relay 54 and the insulation resistance test relay 55, the continuity test and the insulation resistance test can be selected quickly and easily. Switching between the continuity test relay 54 and the insulation resistance test relay 55 is executed by the controller 28 described above.

  Next, the points of the continuity test and the insulation resistance test by the test apparatus having the above-described structure will be described in detail below.

  The watt-hour meter 1 is placed on a mount 23 that is inclined by a predetermined angle θ (for example, 45 °). The watt-hour meter 1 automatically moves downward on the pedestal 23 with its own weight, and a rod-shaped test terminal 24 disposed at the lower portion of the pedestal 23 is placed in the opening hole 15 of the terminal portion 14 of the watt-hour meter 1. It is smoothly inserted and reliably and easily connected to the connection terminals 6S to 8S and 6L to 8L of the terminal portion 14. In this way, after setting the watt hour meter 1 on the gantry 23, the switch 30 is pushed in a state where the ground terminal 25 is brought close to the cover fixing screw 11 of the watt hour meter 1. When the switch 30 is turned on, the controller 28 automatically brings the ground terminal 25 into contact with the screw 11. In this state, a continuity test and an insulation resistance test are performed.

  First, in the continuity test, as shown in FIG. 11, the controller 28 closes all the contacts 56a to 56d of the continuity test relay 54 and opens all the contacts 57a to 57d of the insulation resistance test relay 55. . At this time, the contact 57a of the insulation resistance test relay 55 is opened, so that the ground terminal 25 is in a disconnected state.

  Thus, the resistance meter 26, the contacts 56a to 56d of the continuity test relay 54, the test terminal 24, the connection terminals 6S to 8S and 6L to 8L of the watt-hour meter and the internal circuits X, Y and Z (one point in the figure) A closed loop circuit is formed by a chain line). That is, the closed loop circuit is composed of an ohmmeter 26-a test terminal 24-a connection terminal 8L-an internal circuit X-a connection terminal 8S-a test terminal 24-a contact 56c of a continuity test relay 54-a contact 56b of a continuity test relay 54-a test terminal. 24-connection terminal 7S-internal circuit Y-connection terminal 7L-contact point 56d of continuity test relay 54-test terminal 24-connection terminal 6L-internal circuit Z-connection terminal 6S-test terminal 24-contact point of relay 54 for continuity test 56a—comprising an ohmmeter 26. If the resistance value measured by the ohmmeter 26 is, for example, 10Ω or less due to current flowing through the closed loop circuit, the controller 28 determines that the continuity test is “good” and the display 29 displays the result of the continuity test. To do.

  Next, in the insulation resistance test, as shown in FIG. 12, the controller 28 opens all the contacts 56a to 56d of the continuity test relay 54 and closes all the contacts 57a to 57d of the insulation resistance test relay 55. To do. When the contact 57a of the insulation resistance test relay 55 is closed, the ground terminal 25 is connected.

  In this way, the internal circuits X, Y, and Z (see the dashed line in the figure) of the watt-hour meter 1 are in the grounded state. That is, the insulation resistance meter 27-contacts 57b, 57c, 57d of the insulation resistance test relay 55-test terminal 24-connection terminals 6L, 7L, 8L-internal circuit X, Y, Z-screw for fixing the cover of the watt-hour meter 1 The ground circuit is formed by 11-earth terminal 25-contact point 57a of insulation resistance test relay 55-insulation resistance meter 27. If the insulation resistance value measured by the insulation resistance meter 27 in this ground circuit is, for example, 20 MΩ or more, the controller 28 determines that the insulation resistance test is “good”, and the display 29 displays the result of the insulation resistance test. .

  The present invention is not limited to the above-described embodiments, and can of course be implemented in various forms without departing from the gist of the present invention. It includes the equivalent meanings recited in the claims and the equivalents recited in the claims, and all modifications within the scope.

1 Electricity meter (unit-type electricity meter)
5 Electricity meter body (base)
6S-8S connection terminal (primary side connection terminal)
6L-8L connection terminal (secondary side connection terminal)
14 Terminal portion 15 Opening hole 23 Base 24 Test terminal 25 Ground terminal

Claims (4)

For the watt-hour meter in which a terminal part in which a plurality of connection terminals are arranged at the lower part of the watt hour meter body and an opening hole for each connection terminal is formed on the lower end surface of the terminal part, the test terminal is connected to the connection terminal. Is a watt-hour meter testing device capable of conducting a continuity test and an insulation resistance test of the watt-hour meter by detachably connecting the watt-hour meter,
A pedestal on which the watt-hour meter is mounted and inclined by a predetermined angle with respect to the horizontal direction, and a plurality of test terminals disposed in correspondence with the connection terminals of the watt-hour meter at the lower part of the pedestal. The test terminal is inserted into the opening hole of the terminal portion by the dead weight of the watt hour meter by placing the watt hour meter on a pedestal to form a rod shape that is electrically connected to the connection terminal. A watt-hour meter testing device characterized by   2. The test terminal according to claim 1, wherein the test terminal is detachably attached to the gantry, and a plurality of types of test terminals corresponding to types of watt hour meters having different numbers and arrangement pitches of the connection terminals are detachable from the gantry. Energy meter test device.   The watt-hour tester according to claim 1 or 2, wherein a ground terminal that is electrically connected to a conductive portion of the watt-hour meter main body is disposed on a side portion of the gantry.   The test terminal is a continuity test relay that allows the continuity test to be performed by closing the contact point during the watt-hour continuity test, and the insulation resistance test is performed by closing the contact point during the watt-hour meter insulation resistance test. The watt-hour meter test device according to any one of claims 1 to 3, wherein the watt-hour meter test device is connected to an insulation resistance test relay that is enabled.

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