JP4284012B2 - Terminal block for energy meter - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a watt-hour terminal block that can be stored in an outer box of a watt-hour meter.
[0002]
[Prior art]
FIG. 9 shows a front view of a conventional composite instrument. FIG. 10 shows a front view of a conventional household electricity meter.
[0003]
Large-scale customers who make a demand contract use a composite meter that measures power factor, demand power, hourly power consumption, etc. as a trading instrument for power consumption. Measure measurement items such as total daily energy, force measurement active energy, force measurement reactive energy, and demand power. In recent years, composite watt-hour meters having a communication function have become widespread in order to rationalize meter reading work and supply data to customers.
[0004]
Since the composite instrument is used for trading electric power, it is installed at the cost of the electric power company that provides electric power. The cost is capital investment of the electric power company and is reflected in the electric power fee as it is. For this reason, there is a demand for an instrument that can be measured at a low cost.
[0005]
As cost reduction means for providing an inexpensive instrument, common parts or miniaturization can be considered. First, the standardization of parts means that parts that are mass-produced and parts that have mass production effects are made common. Household electricity meters are installed in general consumers nationwide with time contracts and are more demanding than composite electricity meters. Therefore, it is desirable to share parts with household electricity meters.
[0006]
The home watt-hour meter shown in FIG. 10 has fewer functions and measurement items than the composite meter shown in FIG. 9, so the external dimensions of the meter are also small, and means for realizing the function in the terminal block 13 can be taken. . For this reason, it is not necessary to provide another switch cover 15 on the cover 14 and provide the return switch 4, the setting / storage switch 5, and the numeric feed switch 6 for the maximum demand power in the cover 14 as in the composite instrument. For this reason, a shape is simple and can manufacture a meter by press work, and an inexpensive outer box can be manufactured by mass production effect.
[0007]
On the other hand, the composite meter shown in FIG. 9 has functions such as metering pulse service to customers, communication, time setting, and return to maximum demand power compared to the home electricity meter shown in FIG. The measuring pulse service terminal 2, the communication terminal 3, the return switch 4 for maximum demand power, the setting / storage switch 5, the numeric feed switch 6, and the earphone jack 8 are required. The return switch 4, the setting / storage switch 5, and the numeric feed switch 6 are provided in another switch cover 15 provided on the cover 14 that can be sealed with electric power. To form another switch cover 15 on the cover 14 while ensuring the weather resistance, the shape of the cover 14 is complicated. For this reason, the outer box of the composite instrument cannot be pressed, and is processed by die molding such as die casting, so that the cost of the outer box is high.
[0008]
In order to make the outer box of the combined meter common with the outer box of the home electricity meter, it is necessary to make the terminal block 12 small, and the measuring pulse service terminal 2 for realizing the function of the combined meter It is necessary to provide the terminal block 13 with the configuration of the communication terminal 3, the switches 4, 5, 6 and the earphone jack 8. Since this is in the direction of enlarging the terminal block 13, the two are contradictory.
[0009]
On the other hand, since the watt-hour meter is used for trading electricity bills, it is subjected to a 100% verification and is sealed so that it cannot be opened within its validity period. In addition, a power seal is applied to a portion managed by the power company. Such a watt hour meter is required to have different weather resistance depending on the usage environment, and there are items such as a water injection test in the reinforced weather resistance and normal weather resistance type instruments. If the opening is made, the structure of the window becomes complicated to ensure the water injection performance, and the cost increases.
[0010]
In addition, in order to realize the function of the composite instrument in the outer box of the home watt-hour meter, it is conceivable to reduce the size of the terminal block 12 and the terminal 7 and other components. Insulation performance is required between the electric circuit and the case, between the electric circuits such as the measurement pulse service terminal 2 and the communication terminal 3, and between the cases. For this reason, if the size is extremely reduced, the insulation distance is reduced and the insulation performance cannot be secured.
[0011]
Furthermore, the terminal 7 to which the current and voltage are input needs to have a certain size so that there is no abnormality when the overcurrent and overvoltage are applied, and the power loss does not increase. It cannot be extremely downsized.
[0012]
In addition, the lightning impulse performance required by electric power company standards for watt-hour meters, which currently requires a performance of 6 kV or higher, requires an insulating partition between terminals, which is one of the obstacles to miniaturization. It is.
[0013]
[Problems to be solved by the invention]
As described above, in order to realize the function of the composite instrument at a low cost, it is desirable to divert the outer case of the household electricity meter that is produced in large quantities. The measuring pulse service terminal 2, the communication terminal 3, and the switches 4, 5, 6 as means need to be configured in the terminal block 13, which causes the terminal block 13 to be enlarged and the outer box cannot be diverted. As one of cost reductions, there is a method for reducing the size such as the terminal interval in order to reduce the size. However, if the terminal interval is reduced, the insulation distance is reduced and the insulation performance is lowered, so that there is a limit. Furthermore, it is not possible to make the terminal 7 extremely small because there is a concern that heat generation and power loss due to overcurrent increase.
[0014]
The present invention is an electric energy that can reduce the cost of the watt hour meter by arranging the measuring pulse service terminal, the communication terminal, and the switch part without increasing the size of the terminal block while ensuring the insulation performance and the weather resistance performance. It is to provide a measuring terminal block.
[0015]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the present invention is a watt-hour meter terminal block that can be housed in an outer box of a watt-hour meter, and a switch portion is disposed above or below the metering pulse service terminal and the communication terminal. The switch portion is incorporated in another piece block having a concave shape different from the terminal block.
[0016]
According to this invention, since the switch part is disposed above or below the metering pulse service terminal and the communication terminal, it is not necessary to increase the size of the terminal block, and the cost of the watt-hour meter can be reduced. Further, since the switch portion is incorporated in a separate piece block having a different shape from the terminal block, the insulation performance and weather resistance performance can be easily ensured.
[0017]
In addition, a terminal block for the watt hour meter that can be stored in the outer box of the watt hour meter, wherein the switch portion is disposed above or below the measurement pulse service terminal and the communication terminal, and the measurement pulse service terminal and the communication terminal And the switch portion are incorporated in a separate piece block having a different concave shape from the terminal block, and the separate piece block is incorporated in the terminal block as a unit.
[0018]
According to this invention, since the switch part is disposed above or below the metering pulse service terminal and the communication terminal, it is not necessary to increase the size of the terminal block, and the cost of the watt-hour meter can be reduced. In addition, by incorporating the switch unit, the measuring pulse service terminal and the communication terminal into another piece block having a concave shape different from the terminal block and incorporating the other piece block as a unit into the terminal block, the measuring pulse is directly applied to the terminal block. Assembling work can be performed more easily than when incorporating a service terminal and a communication terminal.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of a watt-hour meter terminal block according to the present invention will be described in detail with reference to the drawings.
[0020]
(First embodiment)
FIG. 1 is a front view showing a state in which another concave piece block is incorporated in the watt-hour meter terminal block according to the first embodiment. FIG. 2 is a front view showing a state in which the metering pulse service terminal and the communication terminal and another concave piece block are incorporated in the watt-hour meter terminal block according to the first embodiment. FIG. 3 is a perspective view showing a state in which the switch unit is incorporated in the concave separate piece block according to the first embodiment. 4 is a cross-sectional view taken along a line AA in FIG. FIG. 5 is a front view showing the watt-hour meter having the watt-hour meter terminal block and the concave separate piece block according to the first embodiment.
[0021]
A watt-hour meter terminal block (hereinafter referred to as a terminal block) 1 shown in FIG. 1 is an elongated terminal block that can be stored in an outer box of a household watt-hour meter as shown in FIG. In this terminal block 1, a terminal 7 is arranged from substantially left end to substantially center, and a switch portion 10 including switches 4, 5, 6 is arranged on the right side and upper side of the terminal 7. A measuring pulse service terminal 2 and a communication terminal 3 are arranged on the right side and the lower side of 7. An earphone jack 8 is disposed at a substantially right end of the terminal block 1.
[0022]
The switch unit 10 includes a return switch 4 for maximum demand power, a setting / storage switch 5 and a numeric feed switch 6, and as shown in FIG. 4, the terminal block 1 is completely separated from the terminal block 1. It is covered with another piece block 9 made of another concave phenol resin or the like. For this reason, the insulation performance of the switch part 10, the measurement pulse service terminal 2, and the communication terminal 3 can be ensured.
[0023]
Further, the measuring pulse service terminal 2 and the communication terminal 3 are fastened with a terminal screw 17 as shown in FIG.
[0024]
Thus, according to the watt-hour meter terminal block according to the first embodiment, as shown in FIG. 2, first, the metering pulse service terminal 2 and the communication terminal 3 are assembled in the terminal block 1 and the metering incorporated therein. On the upper part of the pulse service terminal 2 and the communication terminal 3, another concave piece block 9 incorporating the switch unit 10 composed of the switches 4, 5, 6 is arranged and incorporated in the terminal block 1.
[0025]
That is, the measuring pulse service terminal 2 and the communication terminal 3 and the switch unit 10 are arranged in the upper and lower positions in the terminal block 1 so that the lateral width of the terminal block 1 is set to the terminal block 13 of the conventional household watt-hour meter. Therefore, the width of the terminal block 1 is not increased. For this reason, the outer box of the composite meter and the outer box of the household watt hour meter can be shared, and the cost of the watt hour meter can be reduced due to the mass production effect.
[0026]
The measurement pulse service terminal 2 and the communication terminal 3 are in direct contact with each other for use by the user, and are preferably insulated from the circuit of the switch unit 10. For this reason, insulating performance and weather resistance performance can be easily ensured by covering the switch part 10 with the concave separate piece block 9. Furthermore, there is no problem in assembly work and switch operation.
[0027]
(Second Embodiment)
Next, the watt-hour meter terminal block according to the second embodiment of the present invention will be described. FIG. 6 is a rear perspective view showing a state in which a measuring pulse service terminal, a communication terminal, and a switch unit are incorporated in another concave piece block according to the second embodiment. FIG. 7 is a front perspective view showing a state in which a measuring pulse service terminal, a communication terminal, and a switch unit are incorporated in another concave piece block according to the second embodiment. FIG. 8 is a front view showing a state in which the metering pulse service terminal and the communication terminal and another concave piece block are incorporated in the watt-hour meter terminal block according to the second embodiment.
[0028]
As shown in FIG. 6, the concave separate piece block 11 is configured to incorporate the switch unit 10 in the upper part and the measurement pulse service terminal 2 and the communication terminal 3 in the lower part.
[0029]
In this way, according to the watt-hour meter terminal block according to the second embodiment, as shown in FIG. 6, the measuring pulse service terminal 2 and the communication are connected to the concave separate piece block 11 into which the switch unit 10 is incorporated. Incorporate terminal 3. Thereafter, as shown in FIG. 8, the separate piece block 11 is integrated into the terminal block 16 and incorporated. Thereby, the terminal block 16 which has arrange | positioned the switch part 10, the measurement pulse service terminal 2, and the communication terminal 3 up and down can be comprised.
[0030]
That is, by previously incorporating the switch unit 10, the measurement pulse service terminal 2 and the communication terminal 3 into another piece block 11 having a concave shape different from the terminal block 16, and incorporating the other piece block 11 as a unit into the terminal block 16, Assembling work can be performed more easily than when the measuring pulse service terminal 2 and the communication terminal 3 are directly incorporated into the terminal block 16. Thereby, work efficiency improves.
[0031]
Moreover, since the switch part 10 is arrange | positioned in the upper part or the lower part with respect to the measurement pulse service terminal 2 and the communication terminal 3, it is not necessary to increase the dimension of the terminal block 16, and the cost of a watt-hour meter can be reduced.
[0032]
【The invention's effect】
According to the present invention, the metering service pulse terminal, the communication terminal, and the switch unit for realizing the function of the composite instrument are provided in the terminal block for common parts, and the insulation performance required for the watt-hour meter and The terminal block of the conventional composite meter can be made to have the same dimensions as the terminal block of the home electric energy meter while ensuring the weather resistance performance. As a result, it is possible to share the outer box with the home watt-hour meter, and to reduce the cost of the watt-hour meter.
[Brief description of the drawings]
FIG. 1 is a front view showing a state in which another concave piece block is incorporated in a watt-hour terminal block according to a first embodiment.
FIG. 2 is a front view showing a state in which a metering pulse service terminal and a communication terminal and a concave separate piece block are incorporated in the watt-hour meter terminal block according to the first embodiment;
FIG. 3 is a perspective view showing a state in which a switch unit is incorporated in another piece block having a concave shape according to the first embodiment.
4 is a cross-sectional view taken along a line AA in FIG.
FIG. 5 is a front view showing a watt-hour meter having a watt-hour meter terminal block and a concave separate piece block according to the first embodiment;
FIG. 6 is a rear perspective view showing a state in which a measurement pulse service terminal, a communication terminal, and a switch unit are incorporated in another concave piece block according to the second embodiment.
FIG. 7 is a front perspective view showing a state in which a measuring pulse service terminal, a communication terminal, and a switch unit are incorporated in another concave piece block according to the second embodiment.
FIG. 8 is a front view showing a state in which a metering pulse service terminal, a communication terminal, and another concave piece block are incorporated in the watt-hour meter terminal block according to the second embodiment.
FIG. 9 is a front view of a conventional composite instrument.
FIG. 10 is a front view of a conventional household electricity meter.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1,12,13,16 ... Terminal block, 2 ... Metering pulse service terminal, 3 ... Communication terminal, 4 ... Reset switch, 5 ... Setting / memory switch, 6 ... Number feed switch, 7 ... Terminal, 8 ... Earphone jack, 9, 11 ... separate piece block, 10 ... switch part, 14 ... cover, 15 ... switch cover, 17 ... terminal screw.

Claims (2)

A watt-hour terminal block that can be stored in an outer box of a watt-hour meter, wherein a switch part is arranged above or below the measuring pulse service terminal and the communication terminal, and the switch part is separate from the terminal block. A terminal block for a watt-hour meter, which is incorporated into a separate concave piece block. A terminal block for a watt-hour meter that can be stored in an outer box of a watt-hour meter, wherein a switch part is disposed above or below the measurement pulse service terminal and communication terminal, and the measurement pulse service terminal, communication terminal, and switch A terminal block for a watt-hour meter, wherein the part is incorporated in a separate piece block having a different shape from the terminal block, and the separate piece block is incorporated in the terminal block as a unit.

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