JPH03140880A - Replacing device of watt-hour meter without interruption of service - Google Patents

Abstract

PURPOSE:To replace a watt-hour meter without interruption of service by a construction wherein three sets of selector switches made of synthetic resin and provided with copper pieces for connection with terminals are disposed in recessed parts of a terminal block so that they can be moved forward and backward and fixed and the switches are so formed as to be switchable to breaking, making and short-circuiting. CONSTITUTION:Pin terminals 8 to 11 of a terminal block 2 are connected to terminals 4 to 7 of the main body 1 of a watt-hour meter, and three sets of selector switches constructed of short-circuit bars 16 to 18 made of synthetic resin are disposed in recessed parts of the block 2. A projection 16c fitted in a groove 2a being used as a guide, the bar 16 is slidden in the recessed part and fixed at an appropriate position, and thereby a copper piece 16b is made to operate so that it comes into contact with or detaches from a terminal 8a. By this combination, a device is put in any of states of breaking, making and short-circuiting. The bars 17 and 18 have the same structure as the bar 16 and make the same operation. When the device is at a position of breaking, accordingly, supply of a current onto the load side is stopped. When it is at a position of making, the current is supplied onto the load side through the main body 1 and a consumed power is metered. When the device is at a position of short-circuiting, the current is supplied onto the load side directly without being passed through the main body 1, and therefore the main body of the watt-hour meter can be replaced without interruption of service.

Description

[Detailed Description of the Invention] A. Field of Industrial Application The present invention enables the replacement of a large-capacity integrating watt-hour meter without causing a power outage on the load side, and also makes it easy to supply and stop power to the load side. The present invention relates to an uninterruptible replacement device for an integrated power consumption meter.

Conventional technology Conventionally, as an uninterruptible replacement device for an integrating watt-hour meter, it is possible to replace the integrating watt-hour meter without causing a power outage on the load side, and to easily supply and stop power to the load side. As in Publication No. 62-12869, it consists of a watt-hour meter body and a terminal block, and the terminal block is provided with a terminal for connecting the watt-hour meter body, and a three-point changeover switch that can be switched to cut-off, make-on, and short-circuit, In the short-circuit position, power is supplied directly to the load terminal without passing through the watt-hour meter body, and in this state, the watt-hour meter is replaced, and in the cut-off position, the power supply to the load side is stopped.

C. Problems to be Solved by the Invention In the conventional uninterruptible replacement device for integrating watt-hour meters, the three-point changeover switch is a slide switch, which makes it difficult to manufacture a large-capacity watt-hour meter, and it is difficult to manufacture a large-capacity watt-hour meter with a 120-amp class integrated watt-hour meter. It was not compatible with electricity meters. In addition, since the terminal on the watt-hour meter main body side is a pin terminal, it is dedicated, and when replacing it, it is not possible to use an integrating watt-hour meter with a normal terminal structure.

2. Means for Solving the Problems In view of the drawbacks of the conventional uninterruptible replacement devices for integrating watt-hour meters, the present invention provides a method for easily and safely replacing large-capacity watt-hour meters without interruption, The present invention provides an uninterruptible replacement device for an integrating watt-hour meter that is capable of replacing an integrating watt-hour meter having a terminal structure. The block is provided with pin terminals for connecting the terminals, and the power meter main body and the terminal block are removably formed. It is equipped with three sets of changeover switches that can be switched to short circuit, and the changeover switches have a copper piece for terminal connection on the bottom, a longitudinal projection on the body, and an elongated insertion hole in the center of the body. Each columnar body is made of a synthetic resin and is provided with a groove that fits into the protrusion and is reciprocally movable and fixed in a recess slightly longer than the length of the columnar body.

(e) Connect the pin terminals of the terminal block to the terminals of the working watt-hour meter main body, and slide the changeover switches arranged in the recesses of the terminal block into the recesses using protruding guides that fit into the grooves; By fixing each switch in an appropriate position, the copper pieces of the changeover switch can be attached to and detached from the terminals, and depending on the combination, the device can be in one of three states: cut-off, turn-on, and short-circuit.
In the cut-off position, the current supply to the load side is stopped, in the on position, current is supplied to the load side through the watt-hour meter body and the power consumption is measured, and in the short-circuit position, the current is supplied to the load side through the watt-hour meter body. Since current is supplied directly to the load side without passing through it, the power meter itself can be replaced without interruption.

Further, since the changeover switch is fixed at a predetermined position, it will not burn out and can be used with a large-capacity watt-hour meter.

EXAMPLE An example of an uninterruptible replacement device for an integrating watt-hour meter according to the present invention will be described based on the drawings.

In FIG. 1, numeral 1 is a power meter main body, 2 is a terminal block, and 3 is a sealing cover that covers the lower part of the power meter main body 1 and the terminal block 2.

At the bottom of the electricity meter body 1, there are pin terminal connection terminals 4.5.6 with four pin holes for connection to the terminal block 2.
and 7 are provided, and on the top of the blade terminal block 2 are pins of the same pitch as the pin terminal connection terminals for insertion into and electrically connecting to the pin terminal connection terminals 4 to 7 of the power meter main body l. Terminals 8.9.10 and 11 are provided respectively, and by inserting and connecting these pin terminals 8.9.1o and 11 to the pin terminal connection terminals 4.5.6 and 7, respectively, the power meter body 1 is connected. It is integrated with the terminal block 2 and also connects pin terminals 4.5.6 and 7 to pin terminals 8.9.1.
The power meter main body 1 and the terminal block 2 are separated by removing the terminals 11 and 11 and disconnecting the two. In this way, both are removably formed, and since the pin terminal is provided on the terminal block side, it is possible to replace an integrating watthour meter having a normal terminal structure.

Furthermore, a power line connection terminal 12.13 for connecting to a power line and a load line connection terminal 14.15 for connecting to a load line are provided at the lower end of the terminal block 2. A shorting bar 16 that constitutes three sets of changeover switches is located between the 15th group and the pin terminals 8 to 11th group.
．． 17, 18 and set screws 16a, 17a, 18a are provided.

Since the detailed structures of these shorting bars 16, 17, and 18 are the same in all three, only the shorting bar 16 will be explained and the explanation of the others will be omitted.

The shorting bar 16 is a prismatic body made of synthetic resin, and is shown in FIG.
As shown in a) and FIG. 2(b), there is a pin terminal 8 at the bottom.
The copper piece 16b connected to the connection terminal 8a of the fuselage has a protrusion 16C116c extending in the longitudinal direction on the fuselage, an elongated insertion hole 16d into which the set screw 16a is inserted in the center of the fuselage, and a notch on the end side of the fuselage. A recess 2c slightly longer than the length of the shorting bar 16 of the terminal block 2, provided with a screw 16e and a groove 2a2a that fits with the projections 16c, 16c.
It is fitted inside.

Then, the screw head inserted into the insertion hole 16d to tighten the shorting bar 16 loosens the resin set screw 16a, and the shorting bar 16 is moved upward ( Pointing upward in Figure 2(a),
When the set screws 16a and 16e are respectively tightened at the upper limit position as shown in FIG. 2(d), the connecting terminal 8a and the connecting terminal 12a are short-circuited by the copper piece 16b. Pin terminal 8 and power line connection terminal 1
2 are electrically connected. In this way, the shorting bar 16
Since the connection terminals are short-circuited by tightening the set screws 16a and 16e, it can be applied to a large-capacity electricity meter of the 120 ampere class.

Also, contrary to the above, as shown in FIG. 2(C), the shorting bar 16
By sliding the bar downward and tightening the set screw 16a at the lower limit position, the short circuit between the connecting terminal 8a and the connecting terminal 12a is released, and the connection between the pin terminal 8 and the power line connecting terminal 12 is broken. The operating portion for sliding the slider and the screw heads of the setscrews 16a and 16e are both insulated by synthetic resin, so they can be operated safely even when voltage is applied. In addition, by the same operation as the shorting bar 16, the shorting bar 17 shorts or opens the power line connecting terminal 12 and the load line connecting terminal 15, and the shorting bar 18 shorts or opens the pin terminal 11 and the power line connecting terminal 15, respectively. It has become.

As explained above, this device has a simple configuration, so the production cost is low, and by operating the three shorting bars,
Three types of states, a cut-off state, a closed state, and a short-circuit state, can be easily and reliably formed.

That is, in the cutoff state, as shown in FIG. 3(a), the shorting bar 16
．． 17.18 Open all. In this state, no current flows to the load line connection terminals 14 and 15 and no power is supplied to the load side, so it is easy to stop the power supply while there is no power usage contract with the consumer. You can do it with

In addition, in the closed state, as shown in FIG. 3(b), the shorting bar 16.
18 is shorted and the shorting bar 17 is opened. In this state, power line connection terminal 12, pin terminal 8, pin terminal 11
and the load line connection terminal 15 are connected to each other, and power is supplied to the load side through the watt-hour meter main body 1, so that the amount of electric power consumed on the load side is measured by the watt-hour meter main body 1. This is a normal state in which the supplied power is consumed on the load side through the power meter main body l.

Then, the short circuit state is as shown in Fig. 3(C), when the short circuit bar 1
6.18 is opened and the shorting bar 17 is shorted. In this state, power line connection terminal 12.13 and load line connection terminal 1
4.15 are connected respectively, and power is directly supplied to the load side without supplying power to the watt-hour meter main body 1. Therefore, in order to replace the watt-hour meter, the pin terminal connection terminals 4.5.6.7 and pin terminal 8.9.10.11, and then remove the terminal block 2.
Even if the watt-hour meter main body 1 is removed, the power supply side and the load side are short-circuited, so the consumer side will not experience a power outage. To install the watt-hour meter, connect the pin terminal connection terminal 45.6.7 of the watt-hour meter body 1 to the pin terminal 89.10 of the terminal block 2.
．． 11 and tighten each terminal. At this time, the pin terminals 8.9.10.11 are disconnected from the power line connection terminal 12.13 by the short circuit 1 bar 16.18, so no voltage is applied.

After replacing the watt-hour meter, it is switched to the above-mentioned ON state and power is supplied to the load side through the watt-hour meter main body 1.

Effects of the Invention The uninterruptible replacement device for an integrated watt-hour meter according to the present invention has three sets of synthetic resin changeover switches each provided with a copper piece for terminal connection in the recess of a terminal block. The structure is simple, the manufacturing cost is low, and large-capacity power meters can be easily and safely replaced without power outages. In addition, it has excellent practical value, such as being able to replace an integrating power meter with a normal terminal structure.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view of an uninterruptible replacement device for an integrating watt-hour meter according to the present invention, FIG. 2(a) is a plan view of a shorting bar, and FIG.
Figure (b) is an X-Y arrow view of Figure 2 (a), Figure 2 (C)
is an explanatory diagram showing the open state in a vertical side view of FIG. 2(a), FIG. 2(d) is an explanatory diagram showing the short-circuited state, and FIG. 3(a) is an electrical circuit diagram when disconnected. FIG. 3(b) is an electric circuit diagram when turned on, and FIG. 3(C) is an electric circuit diagram when short circuited. 1...Water power meter body, 2...Terminal block, 2a...Groove, 2C...Recess, 3...Sealing cover 4.5.6.7...
Pin terminal connection terminal, 8.9.10.11... pin terminal,
8a, 12a... Connection terminal, 12.13... Power line connection terminal, 14.15... Load line connection terminal, 16.17.1
8... Shorting bars 16a, 16e, 17a. 18a: Set screw, 16b: Copper piece, 16c: Protrusion, 16d: Insertion hole

Claims (1)

[Claims] The watt-hour meter main body is provided with terminals that connect to the terminal blocks, and the terminal blocks are each provided with pin terminals that connect the terminals, so that the watt-hour meter main body and the terminal block are removably formed, and the terminal block The switch is equipped with terminals for connecting the power supply line and load line, respectively, and three sets of changeover switches that can be switched to cutoff, make-on, and short-circuit. A columnar body made of synthetic resin with a longitudinal protrusion and an elongated insertion hole in the center of the body, which reciprocates into a recess that is slightly longer than the length of the columnar body and has a groove that engages with the protrusion. An uninterruptible replacement device for an integrated electricity meter that is movably and fixedly installed.