JP3866541B2 - Electronic energy meter - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a structure of an electronic watt-hour meter, and more particularly to a sealing structure of a circuit breaker type electronic watt-hour meter for wiring.
[0002]
[Prior art]
In order to use a meter used for trading or certification, such as a watt hour meter for trading or certification, it is necessary to apply a verification seal when receiving a certification. As shown in FIG. 7 showing the front view of the watt-hour meter 1A, the sealing structure of the meter has a sealing cap a attached to a sealing screw b that fastens the main body and the lid, but the watt-hour meter itself is still large. So it didn't matter so much.
[0003]
As an aid to energy management methods as part of global environmental problems in recent years, there is a need to finely manage electric power energy. For example, watt-hour meters for managing this can be used, for example, existing distribution boards and mechanical equipment. There is a physical limit to installing it on because of the large watt hour meter. For this reason, miniaturization of the watt hour meter itself has become an urgent task, and electronic watt hour meters have been widely used.
[0004]
There is an electronic watt-hour meter 1B that is downsized by using a circuit breaker type as shown in FIG. FIG. 8 shows a front view thereof. This electronic watt-hour meter B has a container 10 having a space for housing a main body, and a lid 30 that covers the opening of the container 10, and is externally provided on the upper and lower surfaces around the opening of the container 10. As shown in the drawing, the power supply side connection portion 11S to which the power supply side external wire is connected and the load side connection portion 11L to which the load side external wire is connected are opposed to each other. Is provided. Terminal bulkheads 13S and 13L, instrument mounting screw holes 14S and 14L, external wire connection terminal screws 17S and 17L, and a transmission pulse output terminal recess 18 are provided in the connection portion as a distribution breaker type. Composed.
Even if it becomes such a shape, the watt-hour meter used for trading or proofing needs to be verified and sealed. The seal of the single instrument has a cap structure as shown in FIG. 7, but the seal needs to be easily confirmed due to its nature.
However, in an electronic watt-hour meter having a specified size as shown in FIG. 8, if the sealing cap a is to be mounted on the front surface of the instrument as shown in FIG. 9 or FIG. The part is in a state of biting into the container 10, and the internal volume of the container 10 that accommodates the main body is reduced, so that the rationality of the design is lacking and the quality is lowered due to high cost and complexity.
[0005]
Furthermore, the display area on the front side of the instrument and the area of necessary information will be reduced, which will cause adverse effects on the instrument operation.
[0006]
[Problems to be solved by the invention]
Accordingly, the present invention provides a circuit breaker type electronic watt-hour meter having a sealing structure in which a sealing portion can be easily sealed and the sealing can be confirmed without causing an increase in the size of the meter. For the purpose.
[0007]
[Means for Solving the Problems]
In order to solve the above-described problems, the present invention aims to reduce the size of an electronic watt-hour meter by attaching a sealing portion to a terminal partition between each phase.
[0008]
That is, the present invention has an electronic power meter that has a container for housing an electronic watt-hour meter body and a lid that covers the opening of the container, and a connection with a power source or a load is provided around the container opening. The connection portion has a terminal recess that is a recess for arranging terminals of each phase, and a terminal partition provided on a side of the terminal recess, and a sealing portion is provided in the terminal partition between the phases. It was.
[0009]
Further, according to the present invention, in the electronic watt-hour meter, the sealing portion includes a sealing screw that fixes the lid portion to the container and a sealing cap that seals the sealing screw from the surface. Furthermore, in the electronic watt-hour meter, the sealing cap is disposed such that a part of the sealing cap is exposed from the terminal cover when a terminal cover that covers the connection portion is attached.
[0010]
In the present invention, the electronic watt-hour meter is formed in a circuit breaker type for wiring.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the Example of the electronic watt-hour meter equipped with the sealing part concerning this invention is described using FIGS.
[0012]
1 is a perspective view schematically showing an external structure of an electronic watt-hour meter 1 with a terminal cover removed, FIG. 2 is a front view, FIG. 3 is a bottom view, FIG. 4 is a side view, and FIG. FIG. 6 is a perspective view of the terminal cover, showing a state in which the terminal cover is attached.
[0013]
An electronic watt-hour meter 1 having a sealing portion according to an embodiment of the present invention includes a container 10 having a space for housing an electronic watt-hour meter body (not shown), and a lid 30 that covers an opening of the container 10. And is configured.
[0014]
The container 10 is formed as a box having an internal space for accommodating the main body, and a power supply side connection portion 11S to which a power supply side external wire is connected and a load side external wire are connected to an upper surface and a lower surface around the opening. The load side connecting portion 11L is provided to face each other as shown in the figure.
[0015]
The power supply side connection portion 11S includes a terminal recess 12S in which a terminal portion 16S of a current line for connecting the power supply side connection portion 11S and the load side connection portion 11L is disposed, and terminal partition walls 13S provided on both sides thereof, An instrument mounting screw hole 14S provided in one terminal partition and a sealing screw b for fixing the lid 30 constituting the sealing portion according to the present invention provided in the other terminal partition to the container 10 are inserted and fixed. And the mounting groove 15S of the plastic sealing cap a are formed. Reference numeral 17S denotes a terminal screw for connecting an external electric wire.
[0016]
Similarly to the power supply connection portion 11S, the load side connection portion 11L has a terminal recess 12L in which the terminal portion 16L of the current line is disposed, a terminal partition 13L provided on both sides thereof, and one terminal partition. An instrument mounting screw hole 14L, and a hole into which a sealing screw b for fixing the lid portion 30 constituting the sealing portion according to the present invention provided in another terminal bulkhead to the container 10 is inserted and fixed; A mounting groove 15L for a plastic sealing cap a is formed. Reference numeral 17L denotes a terminal screw for connecting an external electric wire, 18 denotes a later-described transmission pulse output terminal recess formed in the terminal partition wall 13L on both sides, and 19 denotes a transmission pulse output terminal screw.
[0017]
The mounting grooves 15S and 15L are formed so that the lower end portion extends to a part of the lid 30 and the sealing cap a is partially exposed when the connecting portion is covered with the terminal cover so that the sealing can be confirmed. Is done.
[0018]
By forming the terminal cover at least on the portion facing the seal using a transparent material, the seal can be confirmed without using the mounting grooves 15S and 15L.
[0019]
The lid portion 30 protects the surface of the electronic watt-hour meter main body fixed to the container 10, and the measurement value display portion 31 for displaying the measured electric energy and the operation for displaying the operation state are provided on the surface. Although it has the display part 32 and the measurement pulse transmission part 33 which displays a measurement pulse with a light emitting diode etc., these illustration is abbreviate | omitted in FIG.
[0020]
As shown in the drawing, the power supply side instrument mounting screw hole 14S provided in the terminal partition and the load side sealing cap a mounting groove 15L, and the power source side sealing cap a mounting groove 15S and the load side instrument mounting. The screw holes 14L are preferably provided so as to face each other on the same line.
[0021]
Reference numeral b denotes a sealing screw. After the main body container 10 and the lid 30 are fastened and subjected to a test, a sealing cap a is mounted thereon through the mounting grooves 15S and 15L, and is fixed and sealed.
[0022]
Then, after sealing, the terminal cover 20 as shown in FIG. 6 is attached to both the power supply side connection portion 11S and the load side connection portion 11L, and is fixed by the fixing knob 21 (FIG. 5). The terminal cover 20 is provided with a fixing knob 21 for fixing the terminal cover 20 to the lid portion 30 and a cover 22 for the sealing cap a.
[0023]
Even when the terminal cover 20 is attached, a part of the sealing cap a can be seen from the gap 23 between the terminal cover 20 and the instrument front surface, so that the sealing state can be easily confirmed.
[0024]
【The invention's effect】
As described above, according to the present invention, by providing the terminal partition with the sealing portion, it is possible to perform sealing without causing reduction in the internal volume or display area of the container that accommodates the electronic watt-hour meter main body. Further, since the sealing portion is provided in the main body container, it is not easily detached, and the sealing cap is made of plastic, so that the safety during wiring can be maintained. Even when the terminal cover is attached, the sealed state can be easily confirmed by the gap between the terminal cover and the instrument front surface.
[Brief description of the drawings]
FIG. 1 is a perspective view schematically showing an external structure of a circuit breaker type electronic watt-hour meter according to an embodiment of the present invention.
FIG. 2 is a front view of the electronic watt-hour meter shown in FIG.
3 is a bottom view of the electronic watt-hour meter of FIG. 1. FIG.
4 is a side view of the electronic watt-hour meter of FIG. 1. FIG.
5 is a front view showing the electronic watt-hour meter of FIG. 1 in a state in which a terminal cover is attached after undergoing a test. FIG.
6 is a perspective view schematically showing an external structure of a terminal cover for the electronic watt-hour meter shown in FIG. 1. FIG.
FIG. 7 is a front view showing an external structure of a conventional electronic watt-hour meter.
FIG. 8 is a front view showing the external structure of the circuit breaker type electronic watt-hour meter for wiring when no sealing part is provided on the front side of the meter.
9 is a front view showing an external structure when a sealing portion is provided on the front side of the meter of the wiring breaker type electronic watt-hour meter of FIG. 8;
10 is a front view showing an external structure when a sealing portion is provided at a position different from the front view of FIG. 9 of the circuit breaker type electronic watt-hour meter of FIG. 8;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Circuit breaker type electronic watt-hour meter 10 Main body container 11S, 11L Connection part 12S, 12L Terminal recessed part 13S, 13L Terminal partition 14S, 14L Instrument mounting screw hole 16S, 16L Current line terminal part 17S, 17L External electric wire Connection terminal screw 18 Transmission pulse output terminal recess 19 Transmission pulse output terminal screw 20 Terminal cover 21 Terminal cover fixing knob 22 Sealing cap cover 23 Gap 30 Lid 31 Measurement value display 32 Operation display 33 Measurement pulse transmission a Cap b Seal screw

Claims (2)

In the electronic watt-hour meter having a container for housing the electronic watt-hour meter main body and a lid for covering the opening of the container, and provided with a connection portion with a power source or a load around the container opening,
The connection portion is a recess for a terminal which is a recess for arranging a terminal of each phase, a terminal partition provided on a side of the recess for the terminal, and a seal for fixing the lid to the terminal partition between the phases. A screw, and a sealing portion made of a sealing cap for sealing the sealing screw from the surface ,
A sealing cap mounting groove is provided in a portion where the sealing cap of the lid is provided,
A terminal cover that covers the connecting portion, wherein the sealing cap covers the connecting portion, and when the terminal cover is attached, a part of the sealing cap is exposed from the terminal cover. Power meter. The electronic watt-hour meter according to claim 1, wherein the electronic watt-hour meter is formed in a circuit breaker type for wiring .

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