JPH0328384Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Application of the Invention) The present invention is an electric energy meter with a structure that can short-circuit the power supply side wiring connected to the terminal fitting of the electricity meter and the load side wiring without causing a power outage to the load. This relates to the terminal board of the meter.

(Background of the idea) It is stipulated that electricity meters must be replaced after a certain period of time. Conventionally, when replacing a watt-hour meter, the power supply side wiring and load-side wiring connected to the terminal fittings of the watthour meter were removed before work was performed, resulting in a power outage to the load during that time.

In addition, in order to avoid a power outage during the replacement of the watt-hour meter, as shown in FIG. Attach the short-circuit terminals 5 through the insulation, and connect between 1S and 1L of the terminal fitting 2 and between 2S and 2L.
Conventionally, the shorting terminals 5 were connected by an electric wire 6 so as to short-circuit between 3S and 3L. However, this method has a problem in that it is time-consuming.

Furthermore, in the past, the applicant divided the terminal block into a first terminal block on the meter body side and a second terminal block on the wiring side, and when replacing the meter body, the terminal fitting of the second terminal block was attached to a shorting bar. A terminal board for a watt-hour meter was developed in which the meter body could be replaced without causing a power outage by short-circuiting the second terminal block and removing the second terminal block from the first terminal block.
No. 61-28067. However, since the second terminal block is separated downward, if the wiring is thick and rigid, it is not easy to remove the second terminal block, and it is difficult to remove the second terminal block from the instrument body. At the time of replacement, the first terminal block, the second terminal block, and the meter body must all be removed and reattached, so the work efficiency of replacing the meter body is poor.

(Purpose of the invention) The purpose of the invention is to solve the above-mentioned problems, to short-circuit the power supply side wiring and the load side wiring without causing a power outage to the load, and to improve the workability of replacing the meter body. It is an object of the present invention to provide a terminal board for a watthour meter that can perform the following steps.

(Characteristics of the invention) In order to achieve the above object, the present invention divides the terminal block into two parts: a wiring connection side terminal block and an instrument body side terminal block that is separated forward from the wiring connection side terminal block. A fixing member is provided for separably fixing the wiring connection side terminal block and the instrument body side terminal block, and the wiring connection side terminal block is provided with a terminal fitting connected to the power supply side wiring and the load side wiring, and the same as the terminal fitting. A conductive member for connection extending behind the terminal block on the meter body side and a hole for installing a short circuit device that opens in front of the terminal fitting are provided at the potential, and the terminal block on the meter body side is provided with a connecting conductive member extending behind the terminal block on the meter body side, and a meter connected to the meter body. A terminal on the main body side, a connecting member that contacts the conductive member for connection at the same potential as the terminal on the main body side of the meter, and a position where the tightening operation can be performed from the front side of the terminal block on the main body side of the meter, and the connecting member A connecting screw is provided to tighten the conductive member for connection, and by inserting the terminal of the shorting device into the hole for installing the shorting device, the corresponding terminal fittings are short-circuited, and the terminal block on the wiring connection side and the wiring are connected. The device is characterized in that the terminal block on the side of the meter body can be separated from the terminal block on the wiring connection side together with the meter body forward.

(Embodiment of the invention) Figs. 1 and 2 show a terminal board of a watt-hour meter as an embodiment of the invention, and Fig. 3 shows the entire watt-hour meter.

Cover the meter body of the electricity meter with the glass cover 10 (third
The lower part of the base 11 (first and second
A terminal board 12 is provided on the left side of the figure. The insulating terminal blocks in the terminal board 12 include two wiring connection side terminal blocks 13a and 13b, and an instrument body side terminal block that is separated from the wiring connection side terminal blocks 13a and 13b toward the front (upward in FIGS. 1 and 2). It is divided into 14 parts. A terminal fitting 15 is fitted into the wiring connection side terminal block 13a, and a connecting conductive member 16 extending behind the meter body side terminal block 14 is fixed to the terminal fitting 15 at the same potential by silver soldering or welding. A screw hole 17 is formed at the end of the conductive member 16 for connection, and a hole 18 that coincides with the screw hole 17 and opens forward is formed in the wiring connection side terminal block 13a. The terminal fitting 15 and the conductive member 16 for connection are connected to the terminal block 13 on the wiring connection side.
covered by b. Power supply insertion hole 1 of terminal fitting 15
Power supply side or load side wiring (not shown) is inserted into 9 and tightened with terminal screws 20. Hole 21 for installing a short circuit device that opens in front of the terminal fitting 15
is provided on the wiring connection side terminal block 13a. Terminal fitting 1 that matches the shorting device mounting hole 21
A plug receiver 22 is formed at position 5. The short circuit device will be described later.

A meter body side terminal 23 is attached to the meter body side terminal block 14, and is connected to the meter body by an internal wiring 24. An electrically conductive connecting member 25 is fixed to the end of the terminal 23 on the meter body side, and its tip protrudes rearward from the terminal block 14 on the meter body side. A connecting screw 26 is inserted through the center of the connecting member 25 . The distal end of the connecting member 25 is inserted into the hole 18, and the connecting screw 26 is screwed into the screw hole 17 of the connecting conductive member 16, thereby connecting the connecting conductive member 16 and the instrument body side terminal 23. A hole 27 that opens in front of the connecting screw 26 is formed in the terminal block 14 on the instrument body side, so that the connecting screw 26 can be tightened from the front through the hole 27. A plastic screw stopper 28 is press-fitted into the hole 27.

As shown in FIG. 2, a fixture 29 is attached to the terminal block 14 on the meter body side, and a fixing screw 30 is screwed into the screw hole of the fixture 29 through the base 11. As a result, the meter main body side terminal block 14 is fixed to the base 11. A nut 31 is embedded in the wiring connection side terminal block 13a, and the fixing screw 32 is inserted into the nut 31 through the fixing fitting 29 and the meter body side terminal block 14.
screwed into. As a result, the meter body side terminal block 14 is fixed to the wiring connection side terminal blocks 13a, 13b with the packing 33 interposed therebetween.

The shorting device 34 is shown in FIG. A plug 36 is attached to the case 35, and its tip protrudes from the case 35. Corresponding plugs 36 are short-circuited by an internal short-circuit wire 37 . 38 is a connection screw that connects the plug 36 and the internal shorting wire 37. A cover 39 is fixed to the case 35 with fixing screws 40. A grasping portion 41 is attached to the outer surface of the cover 39.

FIG. 5 shows a state in which the short circuit device 34 is installed in the short circuit device installation hole 21 of the terminal board 12 shown in FIGS. 1 to 3.

The tip of the plug 36 protruding from the case 35 of the shorting device 34 is inserted into the shorting device mounting hole 2.
1 and the plug receiver 22 to electrically connect to the terminal fitting 15. By installing the short circuit device 34,
The terminal fittings 15 between 1S and 1L and between 3S and 3L are short-circuited via the plug 36 of the short-circuit device 34 and the internal short-circuit wire 37, so that the power supply side wiring and the load side wiring are short-circuited. In addition, 2S-2L of terminal fitting 15
Although not shown, the terminal blocks 13a and 13b are short-circuited from the beginning by known terminal shorting pieces within the wiring connection side terminal blocks 13a and 13b.

When replacing the meter body of the watt-hour meter, first loosen the connecting screw 26 and remove the connecting conductive member 16.
from screw hole 17. Next, after loosening the fixing screw 32 and removing it from the nut 31, the meter body and the meter body side terminal block 14 are pulled out forward from the wiring connection side terminal blocks 13a, 13b. As a result, the connecting member 25 separates from the connecting conductive member 16, and the electrical connection between the meter body side terminal 23 and the terminal fitting 15 is severed. Then, the meter body and the meter body side terminal block 1 can be connected to each other without causing a power outage to the load.
4 can be replaced.

According to this embodiment, the short circuit work is performed by the short circuit device 34.
It is extremely easy to insert the short-circuiting device into the plug 36 and the short-circuiting device mounting hole 21. Furthermore, when replacing the meter, the meter body and the meter body side terminal block 14 can be pulled out forward from the wiring connection side terminal blocks 13a, 13b.
can remain attached to the mounting plate, making the replacement work even easier.

Note that the terminal of the short circuit device 34 is connected to the plug 36.
The terminal is not limited to , but can also be a surface contact type terminal. In that case, the plug receiver 22 is no longer necessary for the terminal fitting 15.

(Effects of the invention) As explained above, according to the invention, the terminal block is divided into two parts: a wiring connection side terminal block and an instrument body side terminal block which is separated forward from the wiring connection side terminal block. A fixing member is provided for separably fixing the wiring connection side terminal block and the instrument body side terminal block, and the wiring connection side terminal block is provided with a terminal fitting connected to the power supply side wiring and the load side wiring, and the same as the terminal fitting. A conductive member for connection extending behind the terminal block on the meter body side and a hole for installing a short circuit device that opens in front of the terminal fitting are provided at the potential, and the terminal block on the meter body side is provided with a connecting conductive member extending behind the terminal block on the meter body side, and a meter connected to the meter body. A terminal on the main body side, a connecting member that contacts the conductive member for connection at the same potential as the terminal on the main body side of the meter, and a position where the tightening operation can be performed from the front side of the terminal block on the main body side of the meter, and the connecting member A connecting screw is provided to tighten the conductive member for connection, and by inserting the terminal of the shorting device into the hole for installing the shorting device, the corresponding terminal fittings are short-circuited, and the terminal block on the wiring connection side and the wiring are connected. Since the terminal block on the instrument body side is separated from the terminal block on the wiring connection side together with the instrument body, the power supply side wiring and the load side wiring can be short-circuited without causing a power outage to the load. Moreover, the workability of replacing the instrument body can be improved.

[Brief explanation of drawings]

Fig. 1 is a sectional view showing one embodiment of the present invention;
3 is a plan view showing a power meter equipped with a terminal board according to an embodiment of the present invention; FIG. 4 is an exploded view showing a short circuit device; FIG. 5 is a sectional view showing a state in which a short-circuiting device is installed in an embodiment of the present invention, and FIG. 6 is a wiring diagram showing connections when short-circuiting a conventional watt-hour meter. 12... Terminal board, 13a, 13b... Wiring connection side terminal block, 14... Instrument body side terminal block, 15... Terminal fitting, 16... Conductive member for connection, 21... Hole for installing short circuit device, 22 ... Plug holder, 23 ... Meter body side terminal, 25 ... Connection member, 26 ... Connection screw, 29 ... Fixing metal fitting, 3
0, 32... Fixing screw, 31... Nut, 34...
...Short circuit device, 36...Plug, 37...Internal short circuit wire.

Claims (1)

[Scope of utility model registration request] Connect the terminal block to the wiring connection side terminal block,
The wiring connection side terminal block is divided into two parts, and a meter body side terminal block is separated forward from the wiring connection side terminal block, and a fixing member is provided to separably fix the wiring connection side terminal block and the meter body side terminal block. Terminal fittings connected to the power supply side wiring and load side wiring to the block, at the same potential as the terminal fittings,
A conductive member for connection extending behind the terminal block on the meter body side and a hole for installing a short circuit device that opens in front of the terminal fitting are provided, and the terminal block on the meter body side is provided with a meter body side terminal connected to the meter body. , a connecting member that is in contact with the electrically conductive member for connection at the same potential as the terminal on the meter body side, and a position where the tightening operation can be performed from the front side of the terminal block on the meter body side; A terminal board for a power meter that is equipped with a connection screw that is tightened to a conductive member.