CN203337814U - Energy meter wiring device - Google Patents

Abstract

The utility model aims to provide an electric energy meter wiring device, which comprises a meter replacement linked switch and a meter calibration linked switch, wherein the meter replacement linked switch is respectively connected with a secondary-side current wire-outgoing end and a secondary-side current wire-incoming end of a current transformer; and the meter calibration linked switch is respectively connected with the secondary-side current wire-incoming end of the current transformer and a current wire-outgoing end of the electric energy meter. When replacing the electric energy meter, the meter replacement linked switch is switched on, and the secondary-side current wire-outgoing end and the secondary-side current wire-incoming end of the current transformer are in short-circuit connection; a calibration instrument is connected during calibration, the meter calibration linked switch is switched off, and the secondary-side current wire-incoming end of the current transformer and the current wire-outgoing end of the electric energy meter are disconnected, thereby realizing the serial connection of the calibration instrument. Therefore, workers do not need to carry out manual wiring during short-circuit connecting and disconnecting processes, thereby reducing the labor intensity of the workers.

Description

Energy meter wiring device

technical field

The utility model particularly relates to a wiring device for an electric energy meter.

Background technique

In the power sector, the replacement and on-site calibration of electric energy meters is an important task in the field. When replacing the watt-hour meter, it is necessary to short-circuit the secondary-side current outlet terminal of the current transformer connected to the watt-hour meter with the secondary-side current input terminal (that is, short-circuit the secondary circuit). When calibrating the electric energy meter on site, it is necessary to disconnect the connection between the current input terminal of the secondary side of the current transformer and the current output terminal of the electric energy meter, and connect it to the calibrator in series.

The above-mentioned short-circuiting of the secondary side current outlet terminal of the current transformer and the secondary side current input terminal, and disconnection of the connection between the secondary side current input terminal of the current transformer and the current outlet terminal of the electric energy meter all require work. The personnel are manually wired, so the labor intensity of the staff is relatively high.

Utility model content

In view of this, the purpose of this utility model is to provide an electric energy meter wiring device to solve the above problems.

The concrete scheme that the utility model solves technical problem is:

A wiring device for an electric energy meter, at least comprising:

Meter change linkage switch and meter calibration linkage switch;

The meter changing linkage switch is respectively connected to the secondary side current outlet terminal and the secondary side current input terminal of the current transformer;

The meter calibration linkage switch is respectively connected to the current input terminal of the secondary side of the current transformer and the current output terminal of the electric energy meter.

Preferably, the meter changing linkage switch is specifically a three-phase linkage switch.

Preferably, the meter calibration linkage switch is specifically a three-phase linkage switch.

Preferably, the terminals of the three-phase linkage switch are spring contacts.

Preferably, the electric energy meter wiring device further includes a calibrator socket, and the socket is provided with a first movable push column.

Preferably, the electric energy meter wiring device further includes a second movable prop, and the second movable prop is arranged above the electric energy meter.

It can be seen that, in the embodiment of the utility model, the meter changing linkage switch is a normally open switch. When the electric energy meter is replaced, the meter changing linkage switch is closed. As soon as the meter change linkage switch is closed, the secondary side current outlet terminal of the current transformer and the secondary side current input terminal are short-circuited; while the meter calibration linkage switch is a normally closed switch, so that the During calibration, the current input terminal of the secondary side of the current transformer is connected to the current output terminal of the electric energy meter. When calibrating, connect the calibrator and turn off the calibration linkage switch, then the current input terminal of the secondary side of the current transformer will be disconnected from the current output terminal of the electric energy meter, so that the current can only flow from the current mutual inductance The secondary side current input terminal of the device flows into the calibrator, thus realizing the serial connection of the calibrator. After using the electric energy meter wiring device provided by the embodiment of the utility model, short-circuit the secondary side current outlet terminal and the secondary side current input terminal of the current transformer, and disconnect the secondary side current input terminal of the current transformer During the connection process between the terminal and the current outlet terminal of the electric energy meter, manual wiring by the staff is not required, thereby reducing the labor intensity of the staff.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are some embodiments of the present utility model. Those skilled in the art can also obtain other drawings based on these drawings without any creative work.

Fig. 1 is a schematic diagram of the working principle of the electric energy meter wiring device provided by the embodiment of the present invention;

Fig. 2 is a schematic diagram of the wiring of the electric energy meter wiring device provided by the embodiment of the present invention;

Fig. 3 is a schematic diagram of wiring of another electric energy meter wiring device provided by the embodiment of the present invention.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the utility model more clear, the technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the utility model. Obviously, the described The embodiments are some embodiments of the present utility model, but not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

In the power sector, the replacement and on-site calibration of electric energy meters is an important task in the field. When replacing the watt-hour meter, it is necessary to short-circuit the secondary-side current outlet terminal of the current transformer connected to the watt-hour meter with the secondary-side current input terminal (that is, short-circuit the secondary circuit). When calibrating the electric energy meter on site, it is necessary to disconnect the connection between the current input terminal of the secondary side of the current transformer and the current output terminal of the electric energy meter, and connect it to the calibrator in series.

The above-mentioned short-circuiting of the secondary side current outlet terminal of the current transformer and the secondary side current input terminal, and disconnection of the connection between the secondary side current input terminal of the current transformer and the current outlet terminal of the electric energy meter all require work. The personnel are manually wired, so the labor intensity of the staff is relatively high.

In view of this, an embodiment of the utility model provides an electric energy meter wiring device to solve the above-mentioned problems.

Figure 1 shows a schematic diagram of the working principle of the electric energy meter wiring device provided by the embodiment of the present invention. The above electric energy meter wiring device may at least include the following components:

Meter changing linkage switch K1 and meter calibration linkage switch K2;

The meter change linkage switch K1 is respectively connected to the secondary side current outlet terminal a and the secondary side current input terminal d of the current transformer 1;

The meter calibration linkage switch K2 is respectively connected to the current input terminal d of the secondary side of the current transformer 1 and the current output terminal c of the electric energy meter 2 .

It can be seen that in the embodiment of the utility model, the meter changing linkage switch K1 is a normally open switch, and the meter calibration linkage switch K2 is a normally closed switch. a->b->c->d.

When replacing the electric energy meter, after closing the meter replacement linkage switch K1, the secondary side current outlet terminal a of the current transformer 1 is short-circuited with the secondary side current input terminal d, so that the current flow direction is a- >d.

When checking, the calibrator 3 is connected, and the meter calibration linkage switch K2 is disconnected, and the current input terminal d of the secondary side of the current transformer 1 is disconnected from the current output terminal c of the electric energy meter 2. In this way, The current can only flow into the calibrator 3 from the secondary side current input terminal c of the current transformer 1, and then flow out from the calibrator 3 into the secondary side current input terminal d of the current transformer 1, thereby realizing calibration The serial connection of tester 3.

It can be seen that after using the electric energy meter wiring device provided by the embodiment of the present invention, the secondary side current outlet terminal and the secondary side current input terminal of the current transformer 1 are short-circuited, and the current transformer 1 is disconnected. During the connection process between the current input terminal of the secondary side and the current output terminal of the electric energy meter, manual wiring by the staff is not required, thereby reducing the labor intensity of the staff.

In practice, the electric energy meter is three-phase four-wire, therefore, the above-mentioned meter changing linkage switch K1 is specifically a three-phase linkage switch, and the meter calibration linkage switch K2 is also specifically a three-phase linkage switch. Figure 1 shows only one of the phases.

Figure 2 shows a schematic diagram of wiring under three-phase four-wire. In Figure 2, N, A, B, and C represent the three-phase and neutral lines of voltage transformers. a, b, c represent the current transformer secondary side current outlet terminal (three-phase), an, bn, cn represent the current transformer secondary side current input terminal (three-phase), 21-23 represent the current transformer The three coils of , and 31-33 represent the three coils of the calibrator.

The secondary side current outlet terminals (three) of the current transformer, the secondary side current input terminals (three), and the current outlet terminals (three) of the electric energy meter are all binding posts. Realize the connection between the meter change linkage switch K1 and the secondary side current outlet terminal and the secondary side current input terminal of the current transformer respectively, and the connection between the meter calibration linkage switch K2 and the secondary side current input terminal of the current transformer and the electric energy meter There are many ways to connect the current outlet terminals. For example, wires are drawn from the terminals of the meter-changing linkage switch K1 and the meter-calibration linkage switch K2, and the wires are connected to the terminal.

In order to further reduce the workload of the staff, in other embodiments of the present invention, the terminal of the meter-changing linkage switch K1 and/or the terminal of the meter-calibration linkage switch K2 can be spring contacts.

Utilizing the elasticity of the spring contact, the spring contact and the terminal are pressed together tightly. Like this, just do not need staff to manually connect electric wire on the binding post again.

The above-mentioned meter changing linkage switch K1 and meter calibration linkage switch K2 can be manual switches, and the opening and closing are manually controlled by the staff when the electric energy meter is replaced or inspected.

In order to further reduce the workload of the staff and improve safety, in other embodiments of the utility model, referring to Fig. 3, the above-mentioned electric energy meter wiring device can also include a calibrator socket 5, and the socket 5 is provided with a first movable top column 7.

In this way, the calibrator is provided with a plug 6 compatible with the socket 5 of the calibrator. When the plug 6 is inserted into the socket 5 of the calibrator, the first movable top column 7 will move upwards by the plug 6, and run to the meter calibration linkage switch K2, so that the calibration linkage switch K2 is disconnected, so that there is no need to manually control the opening Only need to insert the plug 6 to disconnect the meter linkage switch K2, and connect the calibrator 3 in series.

In addition, the electric energy meter wiring device may also include a second movable prop, and the second movable prop is arranged above the electric energy meter. When the energy meter is taken off, it will touch the second movable top column, which is similar to the first movable top column. The second movable top column can close the meter change linkage switch K1, thereby realizing automatic short circuit when replacing the energy meter .

The above are only preferred embodiments of the present utility model, and it should be pointed out that for those of ordinary skill in the art, some improvements and modifications can also be made without departing from the principles of the present utility model. It should be regarded as the protection scope of the present utility model.

Claims (6)

1. an electric energy meter wiring device, is characterized in that, at least comprises:

Change table linked switch and calibration linked switch;

Described changing shown secondary side current leading-out terminal and the secondary side current lead-in wire terminal that linked switch connects respectively current transformer;

Described calibration linked switch connects respectively the secondary side current lead-in wire terminal of current transformer and the electric current leading-out terminal of electric energy meter.

2. electric energy meter wiring device according to claim 1, is characterized in that, the described table linked switch that changes is specially three-phase linked switch.

3. electric energy meter wiring device according to claim 2, is characterized in that, described calibration linked switch is specially three-phase linked switch.

4. according to the described electric energy meter wiring device of claim 2 or 3, it is characterized in that: the terminals of described three-phase linked switch are spring contact.

5. electric energy meter wiring device according to claim 3, is characterized in that, electric energy meter wiring device also comprises the tester socket, is provided with the first movable fore-set on described socket.

6. electric energy meter wiring device according to claim 5, is characterized in that, described electric energy meter wiring device also comprises the second movable fore-set, and the described second movable fore-set is arranged at the electric energy meter top.

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