JPS6212868A - Uninterruptive replacing device for watt-hour meter - Google Patents

Abstract

PURPOSE:To replace a watt-hour meter without interrupting power supply to the demand side by forming a guide part for guiding a holder in a repeating terminal equipment so that a short circuit terminal block is abutted against respecting terminals of the repeating terminal equipment by the elastic force of the holder. CONSTITUTION:A terminal 11 and connection pins 12 to be inserted/connected to the repeating terminal equipment 20 are formed on the watt-hour meter body 10, insertion holes 21 into which the pins 12 are to be inserted, and a terminal part 22 for connecting the pins 12 with the power supply side and the load side are formed in the equipment 20 and a guide part 22 for fitting a short circuit device 30 is formed on both the sides of the equipment 20. At the replacement of the body 10, the holder part 33 of the device 30 is engaged with the guide part 27 of the equipment 20 before the separation of the body 10 from the equipment 20 and power supply side terminals and load side terminals of the equipment 20 are short-circuited so that electric power is supplied from the power supply side to the load side without passing the watt-hour meter. Thus, the watt-hour meter can be replaced without interrupting power supply to the demand side.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a watthour meter that displays the amount of electricity in an integrated manner.
In particular, the present invention relates to an uninterruptible replacement device for a watt-hour meter in which a watt-hour meter main body and a relay terminal device that connects the main body between a power supply side and a load side are configured to be separable.

[Technical background of the invention and its problems]

The electricity meter is connected between the power supply side and the load side.
Electric power supplied from the power supply side is supplied to the load side, that is, each power consumer, via this power amount needle.

Therefore, when replacing the watt-hour meter, the power supply side and the load side are cut off, and each power consumer is temporarily in a power outage state. Currently, for example, many electronic devices with storage functions, such as personal computers or video cameras, are used in homes, and the stored contents of these electronic devices are lost if the power is turned off even temporarily. Sometimes I get in trouble.

For this reason, there is a demand for a power meter that can be replaced without causing a power outage to each consumer.

[Purpose of the invention]

The present invention has been made in response to the above-mentioned needs, and particularly includes a watt-hour meter body that integrally measures the amount of electric power, and a relay terminal device that connects this body between the power supply side and the load side. It is an object of the present invention to provide an uninterruptible replacement device for a nine-power meter configured to be separable, which can be replaced without causing a power outage to each consumer.

[Summary of the invention]

The present invention includes a power needle main body, a relay terminal device, and a short-circuiting device that short-circuits a power source terminal and a load side terminal of the relay terminal device, and connects the short-circuiting device to the power source terminal of the relay terminal device and the load side terminal. The short-circuiting terminal block is configured to contact the terminals to short-circuit each other, and a holder having an elastic force for press-contacting the short-circuiting terminal block to each terminal of the electricity meter main body and attaching the shorting device to the relay terminal device. , wherein the relay terminal device is provided with a guide portion that guides the holder so that the short-circuit terminal block comes into pressure contact with each terminal of the relay terminal device by the elastic force of the holder, and when replacing the watt-hour meter main body. Before detaching the main body from the relay terminal device, the holder of the shorting device is engaged with the guide portion of the relay terminal device, and the power supply side terminal and the load side terminal of the relay terminal device are short-circuited by the shorting terminal block. By supplying power from the power supply side to the load side without going through the watt-hour meter, the watt-hour meter can be replaced without causing a power outage to the consumer.

[Embodiments of the invention]

Hereinafter, one embodiment of the present invention will be described with reference to FIGS. 1 and 2.

10 is a power meter body that integrally measures and displays the power amount; 2
Reference numeral 0 designates a relay terminal device that connects the power meter main body 10 between the power source side and the load side, and 30 represents a short circuit device that is attached to this relay terminal device and short-circuits the power source side and the load side.

These are configured to be separable from each other as described below.

This electricity meter main body 10 is provided with a connecting pin 12 that is inserted into and connected to a terminal 11 and a relay terminal device 20. The relay terminal device 20 is fixed to a wall surface, and has an insertion hole 21 into which the connection pin 12 is inserted and this insertion hole 2.
It has a terminal portion 22 for connecting the connecting pin 12 inserted into the power supply side and the load side.

Each terminal portion 22 includes a connecting screw 23 for fixing the connecting pin 12, and each electric wire 24 on the power supply side and the load side.
25 and a connecting screw 26 for fixing it. This connecting screw 23 fixes the connecting pin 12 of the electricity meter main body 10, and the other connecting screw 26 fixes the power source side electric wire 2.
4 and the load side electric wire 25, the power source side electric wire 24 and the load side electric wire 25 are connected via the watt-hour meter main body 10, and the watt-hour meter main body 10 and the relay terminal device 20 are integrated. . Friend, on both sides of this relay terminal device 20, guide portions 27 for attaching a short circuit device 30, which will be described below, are formed. This guide portion 27 is formed by a recess drawn inward from the side surface thereof.

Further, the shorting device 30 includes a shorting terminal block 32 having a shorting element 31 and a holder 33 that holds this shorting terminal block 32. As shown in FIG. 2, the shorting elements 31 of the shorting terminal block 32 are arranged and projected outward so as to match the connection screws 26 of the relay terminal device 20. In addition, each shorting element 31 is divided into a power supply side and a load side, and is wired within the shorting terminal block 32, as shown by dotted lines 34 in FIG. 2. Further, this short-circuiting terminal block 32 has protrusions 35 formed at both longitudinal ends thereof.

The protrusion 35 is fitted into the holder 33. This holder 33 includes a holding portion 36 that holds the short circuit terminal block 32 by fitting and holding the protrusion 35;
A fixed part 38 connected to this holding part 36 by a fulcrum 37
and nine helical springs 39 stretched between the two 36 and 38 so as to draw them together around a fulcrum 37. This holding portion 36 is formed in a U-shape, and the protrusions 35 of the shorting terminal block 32 are fitted into exit holes on opposite sides thereof. This will cause short circuit terminal block 3
2 is attached to the holding part 36. In addition, the fixed part 3
8 is formed in an H shape, and has projecting pieces 38a that protrude oppositely from each other on opposite sides thereof. The opposing distance between the projecting pieces 38a is formed to be slightly larger than the distance between the guide portions 27 of the relay terminal device 20.

Both ends of this holding part 36 and the protrusion 3 of the fixing part 38
Both end portions on the side where 8a is provided are rotatably attached to each other to form a fulcrum 37. Also, both of these 36,
A spring 39 that exerts its elastic force so as to draw the two together is stretched between each opposing side of the support 38 remote from the fulcrum 37. That is, with this spiral spring 39,
Both 36 and 38 are constructed so as to be attracted to each other around a fulcrum 37.

Next, the operation of one embodiment configured as described above will be explained.

First of all, under normal conditions, the relay terminal equipment is fixed to the wall! 120 and the power meter main body 10 are integrated, and the amount of power used by the consumer is integrated and measured by the power meter main body 10 and displayed.

That is, by inserting each connection bottle 12 of the electricity meter main body 10 into each insertion hole 21 of the relay terminal device 20 and tightening the connection screw 23, both 20 and 10 are integrated and electrically connected. . The power supplied from the power supply side electric wire 24 connected to the terminal portion 22 by the connecting screw 26 is supplied to the main house at the following head pressure. First, the electric power supplied from the power supply side electric wire 24 is transmitted through the terminal section 22 of the relay terminal device 20 (the two on the middle seat side in FIG. It is supplied to the meter body 10. After the electric energy is integrated and measured inside the electric energy meter main body 10, the two connection bins 12. Terminal section 22 of relay terminal device 20
It is supplied to each load of the consumer via the load-side electric wire 25. In this way, under normal conditions, the power supply side electric wire 24 and the load side electric wire 25 are connected via the watthour meter main body 10 .

By the way, in this state, the power meter main body 10 must be removed for replacement etc.
When removed from the relay terminal device 20, the electrical connection between the power supply side and the load side is cut off, resulting in a power outage state on the consumer side. For this reason, before separating both 10 and 20, the shorting device 30 is used to short-circuit the power supply side and the load side to prevent a power outage on the consumer side.

That is, this shorting device 30 is attached to the relay terminal device 20, and the shorting elements 31 of the shorting device 30 are brought into pressure contact with the connection screws 26 of the relay terminal device 20, respectively, and the shorting terminal block 32 is connected to the shorting device 30.
(via the wiring 34 inside) the power supply side electric wire 24 and the load side electric wire 25 are connected and short-circuited. This shorting device 30 is attached to the relay terminal device 20 in the following manner.

First, the holding part 36 and the fixing part 38 of the short-circuiting device 30 are pulled in opposite directions against the helical spring 39 to separate them. In this state, the projecting piece 38a is moved upward from below the relay terminal device 20 with the fulcrum 27 side facing upward while being inserted into the guide portion 27 of the relay terminal device 20. Then, when each shorting element 31 of the shorting terminal block 32 comes to a position facing the connecting screw 26 of the relay terminal device 20, the force that was separating the holding part 36 and the fixing part 38 is removed. That is, by releasing the hand from the short-circuiting device 30, the holding portion 36 and the fixing portion 38 of the holder 33 are attracted to each other by the tensile force of the helical spring 39. By attracting these two 36 and 38, the shorting element 31 of the shorting device 30 is pressed against the connection screw 26 of the relay terminal device 20, and the power supply side electric wire 24 and the load side electric wire 25 are connected to the shorting element 31 and the wiring 34. shorted by.

At the same time, this shorting device 30
As a result, the guide portion 27 and the terminal portion 22 of the relay terminal device 20 are sandwiched between the fixing portion 38 and the shorting terminal block 32. Thereby, this shorting device 30 is attached to and integrated with the relay terminal device 20.

In this manner, the short circuit device 30 is attached to the relay terminal device 20, and the power meter main body 10 is removed from the relay terminal device 20 with the power supply side and the load side short-circuited. Even if the two 10 and 20 are separated, the power supply side and the load side are short-circuited, so the consumer side will not experience a power outage.

Then, after inserting the connecting pin of the new watt-hour meter main body into the insertion hole 21 of the relay terminal device 20 to integrate the two, the short circuit device 30 is removed from the relay terminal device 20. To remove the short circuit device 30, the holding portion 36 is suspended from the spring 3.
This can be done by moving it downward while pulling against the force 9.

In this way, the watt-hour meter main body 10 can be replaced without causing a power outage to the home, and moreover, can be carried out by simply attaching the shorting device 30 to the relay terminal device 20.

Note that the present invention is not limited to this one embodiment, and may be configured as shown in FIGS. 3(A) and 3(B), for example.

In this embodiment, the shape of the short circuit device is changed, and the fulcrum 3
7' is the center position between the holding part 36' and the fixing part 38.

Moreover, the elastic force of the helical spring 39 acts in a direction that constantly separates the attachment portions, that is, the gripping portions of the helical spring 39', contrary to the above embodiment. However, this embodiment is constructed as a spring-loaded scissors structure. The rest of the structure is the same as that of the previous embodiment, so a description thereof will be omitted.

Furthermore, the holder may be simplified as shown in FIGS. 4cA) and 4B. That is, when the protrusion 41 is provided on the side surface of the relay terminal device 20 and the holder 42 is made of an elastic material, the protrusion 41 is provided on the end portion of the shorting terminal block 32 which is bent into an L shape and protrudes from both sides of the short circuit terminal block 32. hole 43 that fits with
It is configured by providing. When installing, holder 4
2 is expanded using elastic force and fitted onto the protrusion 41,
The short circuit terminal block 32 is attached to the relay terminal device 20 under the elastic force.

Furthermore, although we have explained the case of a single-phase, two-wire power meter, in the case of a three-phase, three-wire power meter, there are three contacts on each of the power side and load side, as shown in Figure 5. This embodiment can be applied by preparing a short-circuiting terminal block 52 having 51, and otherwise having the same structure as the previous embodiment.

〔Effect of the invention〕

With this configuration, the power meter itself can be replaced without causing a power outage on the customer side, so the storage contents of the personal computer or video recorder being used at the customer will not be lost, and the power consumption will be reduced. This eliminates the need for inconvenience to customers when replacing the meter. In addition, since the short circuit device is constructed separately, the operator can carry it with him when replacing the watt-hour meter, and it can be applied to any watt-hour meter, allowing for easy and efficient replacement work. .

[Brief explanation of the drawing]

Figures 1 and 2 are for explaining one embodiment of the present invention. Figure 1 (A) is a front view showing a partially disassembled state, and Figure 1 (B) is a side view of a part. Figure 2 is a plan view of the short-circuit terminal block, Figure 3 is for explaining another embodiment, Figure (A) is a front view, Figure CB) is a side view, Figure 4
The drawings are for explaining still another embodiment, and FIG. 5(A) is a front view, FIG. 5(B) is a side view, and FIG. 5 is a front view showing another example of the shorting terminal block. 10... Electric energy meter main body 20... Relay terminal device 22
... Terminal part 24 ... Power supply side electric wire 25 ...
Load side electric wire 27... Guide portion 30... Short circuit device 31... Short circuit element 32... Short circuit terminal block
33...Holder 38a...Protrusion piece 3
9...Tsurumaki Spring Agent Patent Attorney Noriyuki Chika Yudo Hirofumi Mitsumata Figure 2

Claims (1)

[Claims] The watt-hour meter body is removably integrated with the watt-hour meter body that measures and displays the amount of electricity. A power unit comprising a relay terminal device having a terminal section for connecting a power source side electric wire and a load side electric wire, and a short circuit device configured to be detachably attached to the relay terminal device and short circuiting the power source side terminal and the load side terminal. The uninterruptible replacement device for a power meter includes a shorting terminal block that brings the shorting device into contact with a power supply side terminal and a load side terminal of a neutral terminal device to short-circuit each other, and press-fits this shorting terminal block to each terminal of the power meter main body. and a holder having an elastic force for attaching the shorting device to the relay terminal device, and the shorting terminal block is pressed against each terminal of the relay terminal device by the elastic force of the holder. An uninterruptible replacement device for a watt-hour meter, characterized in that a guide portion is provided for guiding a holder.