JP2003028896A - Wiring breaker type electronic watt-hour meter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a breaker type electronic watt-hour meter for distribution that can easily perform examination or test without causing the dimensions of a measuring instrument to increase. SOLUTION: The breaker type electronic watt-hour meter for distribution has at least two current wire terminal sections that are provided on the surface of the periphery of a measuring instrument and are connected to a power supply, and a false load terminal 20 that is arranged in an opening being arranged outside the terminal section. In the watt-hour meter, the false load terminal 20 has a current terminal 161 having a screw hole 162 being provided at the terminal section, a voltage circuit terminal 21 that is connected to the voltage terminal of an electronic circuit where a gripping section 212 is located near the surface of the measuring instrument, and a screw 23 that is inserted into a screw hole 211 being provided at the voltage circuit terminal and is arranged at the screw hole 162 of the current terminal 161 detachably. A spring support 25 is provided at the lower portion of the voltage circuit terminal 21, thus switching real and false loads only by the clamping/and unclamping of screws.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of an electronic watt hour meter, and more particularly to a structure of a test terminal (imaginary load terminal) of the electronic watt hour meter.

[0002]

2. Description of the Related Art Electronic watt-hour meters have been provided for downsizing and maintenance-free watt-hour meters. In order to use such an electronic watt-hour meter for trading or certification, verification or testing is required, and this verification or testing is performed using an imaginary load that separately supplies current and voltage. .
Therefore, the watt-hour meter is provided with a test terminal for imaginary load (imaginary load terminal) as shown in FIGS. FIG. 10 is a front view of the watt hour meter, and FIG. 11 is a connection diagram of the watt hour meter.

Such an electronic watt hour meter 1A is provided with a power source side terminal 11S connected to a power source and a load side terminal 11L connected to a load, and a pair of power source side terminals 11S,
Current circuit terminals 16S and 16S are provided on 11S, respectively, and voltage circuit terminals 60 and 60 are provided on the electronic circuit side constituting the watt hour meter main body via voltage lead wires 62 and 62, respectively. Slidable connecting members 63, 63 are provided between the respective current circuit terminals 16S and the voltage circuit terminals 60, and at the time of testing, they are dissociated from each other and the voltage circuit terminals (imaginary load terminals) 60 are converted into electronic circuits. Supply voltage and perform qualification or test.

As an aid to the energy management method as one of the global environmental problems, the power energy is measured and measured in detail.
Need to manage. There is a physical limit to mounting an electric meter for managing this on, for example, an existing distribution board or mechanical equipment because the electric meter is large. For this reason, there is an urgent need to reduce the size of watt hour meters, and electronic watt hour meters have come into wide use.

There is an electronic watt-hour meter that is miniaturized by making the electronic watt-hour meter a circuit breaker type for wiring (a test terminal is not shown) as shown in FIG. 12, for example.
FIG. 13 shows the connection diagram.

A circuit breaker type electronic watt hour meter 1B is
It is configured to include a container 10 having a space for accommodating an electronic watt-hour meter main body (not shown), and a lid portion 30 that covers an opening of the container. The container 10 is formed as a box having an internal space for accommodating the electronic watt-hour meter main body, and is provided with a connecting portion 11 on the upper surface around the opening. The connection part 11 is a power supply side connection part 11 to which a power supply side electric wire is connected.
Load side connecting portion 11L to which S and the load side electric wire are connected
Are provided to face each other as shown in the figure. The power supply side connecting portion 11S and the load side connecting portion 11L are arranged so that they face each other in the vertical direction, the lower side is the power source side, the upper side is the power source side, and the right side is the right side which is the power source side. , There is an arrangement method such that the left side is the power supply side.

The power source side connecting portion 11S includes a power source side connecting portion 1
A terminal portion 16S of a current line connecting 1S and the load-side connecting portion 11L is arranged. Partition walls 13 on both sides of the terminal portion 16,
An instrument mounting screw hole 14 into which a screw for fixing the main body of the electronic watt-hour meter is inserted and fixed is provided in the internal space.

In the circuit breaker type electronic watt-hour meter 1B having such a structure, the electronic circuit is connected to the current circuit terminal 16S via the current line 50 and receives the supply of electric power from the power source. The current circuit terminal 16S is connected to the voltage circuit terminal 60 connected to the electronic circuit via the connection member 63 and the voltage lead wire 62.

As described above, even if the electronic watt-hour meter is miniaturized as a circuit breaker for wiring, verification or testing is required before it can be used for transaction or certification. Therefore, a test terminal should be provided. is necessary. However, if the structure of the conventional test terminal shown in FIG. 1 is adopted, as shown in FIG. 14, only the test terminal structures 16S, 60, and 63 are provided, so that the structure shown in FIG.
This will lead to an increase in the size of the instrument with respect to the specified dimensions.

[0010]

Therefore, according to the present invention, the verification or test can be easily performed without increasing the size of the meter, and in the actual operation, the test terminal portion is the surface of the electronic watt hour meter. An object of the present invention is to provide a circuit breaker type electronic watt-hour meter for wiring, which has a safe test terminal structure so as not to be exposed to the outside.

[0011]

[Means for Solving the Problems] The test terminals required for the verification and the test are moved from the conventional lateral slide method to the front-back movable method to reduce the size of the watt-hour meter.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION The shape and structure of an electronic watt-hour meter using the test terminal structure according to the present invention will be described below with reference to the drawings. The electronic watt hour meter according to the present invention,
On both sides of the power supply side terminal part, provide a test terminal with a test probe contact part and a screw part, and after the verification test, fasten the screw to the current wire terminal and connect the current side terminal to the voltage side terminal. It is characterized by the fact that

A first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a front view showing an external shape of an electronic watt-hour meter according to the first embodiment, and FIG. 2 is a top view of the electronic watt-hour meter according to the first embodiment showing a test terminal section in section. FIG. 3 is a side view of the electronic watt-hour meter according to the first embodiment showing the test terminal portion as a cross-section before the end of the verification or test, and FIG. 4 (A) relates to the first embodiment. FIG. 4B is a perspective view showing a cross-sectional perspective view for explaining the structure of the test terminal portion of the electronic watt-hour meter, FIG. 4B is a perspective view for explaining the shapes of the parts constituting the test terminal, and FIG. It is sectional drawing of the test terminal part of the electronic watt-hour meter concerning a 1st Example.

The electronic watt-hour meter 1 having the structure of the test terminal portion according to the first embodiment of the present invention is a container 10 having a space for accommodating an electronic watt-hour meter main body (not shown).
And a lid portion 30 that covers the opening of the container.

The container 10 is formed as a box having an internal space for accommodating the main body of the electronic watt-hour meter, and is provided with the connecting portion 11 on the upper surface around the opening. The connection part 11 is a power supply side connection part 11 to which a power supply side electric wire is connected.
Load side connecting portion 11L to which S and the load side electric wire are connected
Are provided to face each other as shown.

The power supply side connecting portion 11S includes a power supply side connecting portion 1
The terminal recessed portion 12S in which the terminal portion 16S of the current line connecting the 1S and the load side connection portion 11L is arranged, and the terminal recessed portion 1S.
A partition wall 13S provided on both sides of 2S, an instrument mounting screw hole 14S into which a screw for fixing the electronic watt-hour meter main body is inserted and fixed in the internal space, and a measuring terminal hole 15S according to the present invention.
And are formed.

In the load side connecting portion 11L, the terminal recess 12L in which the terminal portion 16L of the current line is arranged and the terminal recess 1 are provided.
Bulkhead 13L provided on both sides of 2L, and instrument mounting screw hole 1
4L and a recess 18L for the transmission pulse output terminal are formed.

The terminal portion 16 of the current line of the power source side connecting portion 11S
In the terminal portions 16S provided at both ends of the S, screw holes 162
The current circuit terminal portion 161S having the is formed so as to project toward the test terminal hole 15 direction.

The lid portion 30 is a lid that protects the surface of the main body of the electronic watt-hour meter fixed in the container 10. On the surface of the lid, a measured value display portion 31 for displaying the measured amount of electricity, It has an operation display section 32 for displaying an operation state and a metering pulse transmitting section 33 for displaying a metering pulse by a light emitting diode or the like.

In the internal space 151 of the test terminal hole 15,
A test terminal 20 having the structure according to the present invention is provided. The test terminal 20 includes a voltage terminal frame 21 that functions as a voltage terminal of the electronic watt-hour meter body, and a test terminal screw 23.
, A coil spring 25, and a voltage circuit lead wire 29.

The voltage terminal frame 21 is formed in a substantially rectangular shape, has a screw hole 211 in the center of the upper surface, and has a grip portion 212 that rises from the side surface of the upper surface and a holding portion 212 that rises from the end surface of the upper surface.
It is configured to have a guide piece 213 that guides the voltage terminal frame body itself in the internal space 151.

The test terminal screw 23 is a screw for connecting and fixing the test voltage terminal 21 to the current line terminal 16S after the end of the verification / test, and is inserted into the screw hole 211 and inserted into the screw hole 162 of the current circuit terminal portion 161. It is arranged facing each other.

The coil spring 25 is a spring for urging the voltage terminal frame 21 toward the surface of the connecting portion 11S.

The voltage circuit lead wire 29 is used for the voltage terminal frame body 2.
1 is a lead wire for connecting to the voltage terminal of the electronic watt-hour meter main body, and is electrically connected to the voltage terminal frame body 21 by being soldered to the frame body 21, for example.

As shown in FIG. 3, the proof / test of the electronic watt-hour meter having such a terminal structure is carried out with the current circuit terminal portion 161 of the current line terminal 16S and the voltage terminal 21 separated from each other. This is performed by flowing a test current between the line terminals 16S and 16L, gripping the grip portion 212 of the voltage terminal 21 with the probe of the test apparatus to supply a voltage, and forming and measuring an imaginary load.

After completion of the verification / test, as shown in FIG.
By pressing the test terminal screw 23 into the screw hole 162 of the current circuit terminal portion 161, and fixing it, the current circuit terminal portion 161 of the current wire terminal 16S and the voltage terminal 21 are connected, and the electronic watt-hour meter is actually loaded. State.

A second embodiment of the present invention will be described with reference to FIGS. FIG. 6 is a top view of the electronic watt-hour meter according to the second embodiment in which the test terminal section is shown in cross section, and FIG. 7 is a second view in which the test terminal section before the end of the verification or test is shown in cross section. A side view of the electronic watt hour meter according to the embodiment of
FIG. 8 (A) is a cross-sectional perspective view illustrating the structure of the test terminal portion of the electronic watt-hour meter according to the second embodiment, and FIG. 8 (B) illustrates the shape of the components that make up the test terminal. FIG. 9 is a cross-sectional view of the test terminal portion of the electronic watt-hour meter according to the second embodiment which has completed the verification or test. A front view of the electronic watt-hour meter according to this embodiment is the same as that of the first embodiment, and therefore its illustration is omitted. 6 to 9, constituent elements having the same functions as those of the constituent elements shown in the first embodiment are designated by the same reference numerals.

The electronic watt-hour meter 1 having the structure of the test terminal portion according to the second embodiment of the present invention is a container 10 having a space for accommodating an electronic watt-hour meter main body (not shown).
And a lid portion 30 that covers the opening of the container.

The container 10 and the lid 30 have substantially the same construction as in the first embodiment.

In the internal space 151 of the test terminal hole 15,
A test terminal 20 having the structure according to the present invention is provided. The test terminal 20 includes a voltage terminal plate 22 that serves as a voltage terminal of the electronic watt-hour meter body, a test terminal screw 23, and
It has a leaf spring 26 and a voltage circuit lead wire 29.

The voltage terminal plate 22 is formed in a cross shape in a plan view, has a screw hole 211 in the center of the upper surface, and has a grip portion 212 that rises from the side surface.

The test terminal screw 23 is a screw for connecting and fixing the test voltage terminal 22 to the current line terminal 16S after the verification / test is completed, and is inserted into the screw hole 211, and into the screw hole 162 of the current circuit terminal portion 161. It is arranged facing each other.

The leaf spring 26 includes a pair of legs 26 opened downward.
1 and a guide hole 262, guided by the test terminal screw 23 and in contact with the lower surface of the voltage terminal plate 22, the voltage terminal plate 22 is urged toward the front surface side of the connection portion 11S.

The voltage circuit lead wire 29 is connected to the voltage terminal plate 22.
Is a lead wire for connecting to the voltage terminal of the electronic watt-hour meter main body, and is electrically connected to the voltage terminal plate 22 by being soldered to the voltage terminal plate 22, for example.

Below the wall portion of the internal space 151 of the test terminal hole 15, the voltage terminal plate 2 is provided by the repulsive force of the plate spring 26.
Gradient surfaces 152 that press 2 toward the front surface side of the connection portion 11S are provided facing each other.

As shown in FIG. 7, the verification / test of the electronic watt-hour meter having such a terminal structure is carried out with the current circuit terminal portion 161 of the current line terminal 16S and the voltage terminal 22 separated from each other. This is performed by flowing a test current between the line terminals 16S and 16L, gripping the grip portion 212 of the voltage terminal 22 with the probe of the test apparatus to supply a voltage, and forming and measuring an imaginary load.

After completion of the verification / test, as shown in FIG.
By pressing the test terminal screw 23 into the screw hole 162 of the current circuit terminal portion 161 and fixing it, the current circuit terminal portion 161 of the current wire terminal 16S and the voltage terminal 22 are connected, and the electronic watt-hour meter is actually loaded. State.

[0038]

As described above, according to the present invention, without increasing the size of the electronic watt-hour meter, the grip portion 212 is clipped to supply the voltage of the imaginary load during the verification / test, and the verification / test is performed. After completion of the test, the screw 23 can be put into an actual load state by simply tightening the screw 23, so that it is possible to provide an electronic watt-hour meter with extremely excellent workability. In addition, the grip portion 212
Since the state of can be visually recognized from the outside, it is possible to easily recognize whether the state is an imaginary load or a real load.
Furthermore, in the actual field where the watt-hour meter is actually used, even though the test terminal is near the front of the meter, the charging part is not exposed and safety can be maintained.

[Brief description of drawings]

FIG. 1 is a front view illustrating the shape of an electronic watt-hour meter according to a first embodiment of the present invention.

FIG. 2 is a top view illustrating the shape of the electronic watt-hour meter according to the first embodiment of the present invention.

FIG. 3 is a side view showing a shape of the electronic watt-hour meter according to the first embodiment of the present invention, showing a partial cross section.

FIG. 4 is a perspective view illustrating a structure of a terminal portion of the electronic watt-hour meter according to the first embodiment of the present invention.

FIG. 5 is a cross-sectional view illustrating a state of the terminal portion after the test of the electronic watt-hour meter according to the first embodiment of the present invention.

FIG. 6 is a top view illustrating the shape of the electronic watt-hour meter according to the second embodiment of the present invention.

FIG. 7 is a side view showing the shape of an electronic watt-hour meter according to a second embodiment of the present invention in a partial cross section.

FIG. 8 is a perspective view illustrating a structure of a terminal portion of the electronic watt-hour meter according to the second embodiment of the present invention.

FIG. 9 is a cross-sectional view illustrating a state of the terminal portion after the test of the electronic watt-hour meter according to the second embodiment of the present invention.

FIG. 10 is a front view illustrating an external structure of a conventional electronic watt-hour meter.

FIG. 11 is a connection diagram of the electronic watt hour meter of FIG.

FIG. 12 is a front view for explaining the external structure of a circuit breaker electronic watt-hour meter for wiring (test terminal not shown).

FIG. 13 is a connection diagram of a circuit breaker type electronic watt-hour meter for wiring.

14 is a front view for explaining a state in which a test terminal having a conventional structure is provided on the circuit breaker type electronic watthour meter of FIG.

[Explanation of symbols]

1 Electronic energy meter 10 containers 11 Connection 12-terminal recess 14 Instrument set screw hole 15 Test terminal hole 151 interior space 152 Slope 16 current wire terminals 161 Current circuit terminal 162 screw holes 17 screws 18 Recessed portion for transmitting pulse output 20 Test terminal (imaginary load terminal) 21 Voltage terminal frame 211 screw holes 212 grip 213 Information piece 22 Voltage terminal board 23 Test terminal screw 25 coil spring 26 leaf spring 261 legs 262 holes 29 Voltage circuit lead wire 30 Lid 31 Weighing value display 32 operation display 33 Measuring pulse transmitter 50 current line 60 voltage terminals 62 voltage line 63 Connection member

Continued front page    (72) Inventor Hisaaki Kataoka             5-9-24 Negishidai, Asaka City, Saitama Prefecture (72) Strict cultivation of the inventor             2-8-16 Nishi Mizuhodai, Fujimi City, Saitama Prefecture

Claims (4)

[Claims] 1. A circuit breaker type watthour meter, characterized in that imaginary load terminals are provided on both sides of an end of a terminal portion. 2. The imaginary load terminal has a structure in which a grip portion and a spring support are provided, and by fastening or loosening a screw,
The circuit breaker type watthour meter according to claim 1, wherein the structure has a structure for switching between an actual load and an imaginary load. 3. A wiring breaker having terminal portions for at least two or more current wires provided on a peripheral surface of the instrument and connected to a power source, and an imaginary load terminal arranged outside the terminal portions and not disposed in the opening. In a portable electronic watt-hour meter, the imaginary load terminal is connected to a current terminal having a screw hole provided in the terminal portion and a voltage terminal of an electronic circuit, and a grip portion is located near the surface of the meter. And a screw which is inserted into a screw hole provided in the voltage circuit terminal and is detachably arranged in a screw hole of the current terminal. 4. The circuit breaker power for wiring according to claim 1 or 2, Quantity meter. 4. A spring support is provided below the voltage circuit terminal,
The circuit breaker type electronic watt-hour meter according to claim 3, wherein the actual load and the imaginary load are switched only by fastening and loosening a screw.