JPS5824217Y2 - Measuring instrument - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a measuring instrument, and particularly to a measuring instrument suitable for application to a watt-hour meter having a power supply terminal and a load terminal for use in connection between a power supply and a load.

FIG. 1 is a block configuration diagram showing the general configuration of a general electronic watt-hour meter as an example of a measuring device, in which 1 is a power source, 2 is a power outlet, 3 is an electronic watt-hour meter body, 4
, 5 are power supply side terminals attached as plugs to the electronic watt-hour meter body 3, a, l) are current terminals provided for current detection, and c, d are voltage terminals provided for voltage detection. , 6 is a current transformer that is interposed between the current terminals a and l) to detect the current, 7 is a voltage transformer that detects the voltage between the voltage terminals c and d, and 8 is detected by the current transformer 6. 9 is a multiplier that generates an electrical signal proportional to the product of the input current and the voltage detected by the voltage transformer 7; 9 is a converter that converts the output of the multiplier 8 into a frequency proportional to this; 10 is a A counter for integrating the output of the converter 9, 11 a display device for displaying the counted value of the counter 10, and 12 a terminal a-
13.14 is the load side terminal attached to the electronic watthour meter body 3 as an outlet; 15.16 is the terminal part of the power plug 17; , 18 and 19 are power cords for the load 20.

In this configuration, the power supply 1 includes the power outlet 2, the power supply side terminals 4 and 5, the terminals a and b of the power meter main section 12, the load side terminals 13 and 14, the terminal portions 15 and 16 of the power plug 17,
Electric power is supplied to the load 20 via the power cords 18 and 19, and at this time, the supplied current is detected via the current transformer 6.

On the other hand, power supply side terminals 4 are connected to terminals c and d of the power meter main section 12.
, 5 is current, and this voltage is detected in the voltage transformer 7.

The current and voltage values detected as described above are multiplied by the multiplier 8, and the cumulative value thereof is calculated by the converter 9 and the counter 10.

This result is displayed on the display device 11 as the amount of power supplied from the power source 1 to the load 20.

Note that the outlet 2 and the load side terminals 13.14 have the same configuration, and on the other hand, the power supply side terminals 4, 5 and the terminal section 15.16 of the power plug 17 also have the same configuration. It is extremely easy to attach and detach.

That is, according to the configuration shown in FIG. 1, the power supply side terminals 4 and 5 of the electronic watt-hour meter main body 3 have a plug-like structure, so that connection to and removal from the outlet 2 is easy. and the load side terminal 13 of the electronic watt-hour meter main body 3.
Since the structure of 14 is receptacle-like, it has advantages such as easy connection and disconnection of load 20, and enables effective measurement of electric energy.

However, when testing the power-type watt-hour meter main body 3 side, on the other hand, the above-described configuration causes more inconvenience.

That is, since current terminal a and voltage terminal C are connected,
When the load 20 is connected to the load-side terminals 13 and 14, it becomes difficult to measure the characteristics of the watt-hour meter body 3 by fixing either the power supply voltage or the current value. This can be a factor in reducing productivity when mass-producing type watt-hour meters.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to eliminate the drawbacks of the prior art described above and to provide a measuring instrument that facilitates characteristic testing.

More specifically, in the present invention, at least one of the power supply side terminals configured as a plug is configured with two electrically insulated conductors, and each has a separate conductor for current measurement and voltage measurement. The purpose of the present invention is to provide a new measuring instrument that makes it possible to easily perform characteristic tests by providing the following functions.

Hereinafter, the present invention will be explained in more detail with reference to the drawings.

FIG. 2 is a connection diagram of a watt-hour meter as a measuring device according to an embodiment of the present invention, in which 22.23 indicates two conductors constituting the power supply side terminal 4, and 24 indicates the conductor 22.23. The conductor 22 is connected to the terminal a of the main part 12 of the electronic watt-hour meter, and the conductor 23 is connected to the terminal C of the main part 12 of the watt-hour meter.

Incidentally, the power meter main section 12 has the same configuration as that in FIG. 1.

In such a configuration, when measuring the power consumption of the load 20, connect the power supply side terminals 4 and 5 to the power outlet 2, and further connect the terminal section 15.16 of the power plug 17 to the load side terminal 13.14. This can be easily done by connecting.

At this time, the conductors 22 and 23 constituting the power supply side terminal 4 are electrically conductive by being plugged into the power outlet 2, so that the terminals a and C are connected and equivalently have the same connection configuration as in FIG. 1, As a result, the amount of electric power is measured.

On the other hand, when testing the electricity meter main body 3, the third
Tests such as those illustrated in the connection diagram shown in the figure will be applied.

In addition, 30 is an imaginary load test device, 31 is a voltage source, 32 is a current source, 33.34 is a current output terminal connected to the conductor 22 of the power supply side terminal 4 and the load side terminal 13, 35.3
6 are the conductors 23 of the power supply side terminal 5 and the power supply side terminal 4, respectively.
This is the voltage output terminal connected to.

Incidentally, in the imaginary load test device 30, the voltage source and the current source are connected in such a way that their outputs have a phase relationship, which is indicated by an arrow 37.

In such a configuration, the specific test method is not the essence of the present invention and will not be explained, but the terminals a, l) for current measurement and the terminal c for voltage measurement of the electronic quantity meter main section 12, Since d is completely separated and connected independently to the current source 32 and voltage source 31, a test method in which one of each parameter is fixed and the other is varied can be easily applied. Become.

Therefore, by configuring one of the plug-shaped power supply side terminals 4 and 5 with two electrically separated conductors 22 and 23, it is possible to perform the test efficiently.

Incidentally, in the configuration shown in FIG.
．． It goes without saying that 14 should match the dimensions of the terminal portions 15 and 16 of the power plug 17.

Furthermore, in the configuration shown in FIG. 2, when changing the load 20 whose power consumption is to be measured, pull out the terminal section 15.16 of the power plug 17 from the load side terminal 13.14 and connect it to another load. This can be easily done by inserting the plug into the load terminal 13,14.

In each of the above configurations, a semiconductor counter, a mechanical pulse motor, etc. can be used as the counter 10, and a semiconductor display device, a mechanical register, etc. can be used as the display section 11.

As described above, according to the present invention, it is possible to easily and quickly measure the power consumption of electrical equipment in response to the need for energy-saving equipment. It is possible to obtain a new measuring instrument that can greatly improve mass productivity, and its usefulness is extremely large.

Although the above embodiment has been explained using a power meter as an example, the present invention can also be applied to a measuring device for measuring effective, reactive, and apparent power, or measuring only power. Of course it is effective.

[Brief Description of the Drawings] Figure 1 shows the block configuration of a general electronic watt-hour meter as an example of a measuring device, and Figure 2 shows a block diagram of a measuring device according to an embodiment of the present invention. Electric energy meter connection diagram, Part 3
The figure is a connection diagram when testing the power meter itself. 1...Power supply, 2...Power outlet,
3... Electric energy meter body, 4, 5... Power terminal, 6... Current transformer, 7... Voltage transformer, 22.23. ...Conductor, 24...
·Insulator.

Claims (1)

[Scope of utility model registration request] In a measuring instrument in which a plug and a receiver that can be fitted with the outlet and the plug are inserted between two devices connected via an outlet and a plug, the plug or the receiver is inserted into the outlet. one side is separated by an insulating member, and the insertion plug or socket is comprised of a plurality of conductors that are mutually conductive when an outlet is connected to the outlet or plug, and each of the conductors is connected to a measuring section for a different parameter. A measuring instrument characterized by: