CN2186402Y

CN2186402Y - Actual load parity checker

Info

Publication number: CN2186402Y
Application number: CN 93227677
Authority: CN
Inventors: 赵振东; 周庆亭
Original assignee: Benxi Iron & Steel Co
Current assignee: Benxi Iron & Steel Co
Priority date: 1993-03-25
Filing date: 1993-03-25
Publication date: 1994-12-28
Anticipated expiration: 2003-03-25

Abstract

The utility model relates to an electromagnetic integrated actual load parity checker of an electric energy meter, which is suitable for checking and adjusting 1.0 stage, 2.0 stage and three-phase electric energy meters under the condition that a power generating plant and a power exchanging station have no power failure. The utility model can directly measure a hexagonal figure through changing the positions of a function converter and a switch. The utility model is composed of two 1.2 stage standard kilowatt hour meters, the function converter, a starting switch, and a polarity switch. The utility model has the advantages of reasonable design and simple structure, overcomes the defects of the measuring method of manually connecting wires repeatedly and easy to generate equipment and fatal accidents for measuring the hexagonal figure, and can be safely operated under the condition of no power failure.

Description

Actual load parity checker

The utility model belongs to the comprehensive tester of electromagnetic system, can be widely used under the situation that generating plant and electric substation do not have a power failure verification and adjustment to 1.0 grades, 2.0 grades three-phase electric energy meters, and can directly survey hexagonal figure.

Existing detecting instrument, the general portable watt-hour meter tester that all uses homemade or import, the testing result relative error of this method of calibration is bigger, and for the work on the spot inconvenience, and can not directly survey hexagonal figure.

It is with the accurate kilowatt-hour meter of two station symbols that present detecting instrument is done the hexagonal drawing method, and the method for interim wiring is repeatedly measured.This method operation more complicated, and the equipment personal injury appears easily.

The purpose of this utility model is that the problem at above-mentioned proposition provides a kind of simple in structure, in light weight, easy to carry, does not need external power supply, has the verification of three-phase electric energy meter and the real load of the electric energy meter checker of adjusting function and having straight survey hexagonal figure function.

Figure (1) is a schematic circuit of the present utility model, it by function translator (WS), starting switch (Ka) and (Kc), polarity switch (Ja) and (Jc), and standard kilowatt-hour meter (KWha) and (KWhc) form, the method for attachment of kilowatt-hour meter and switch is the connected mode of a kind of translate phase and polarity.

Figure (2) is a straight survey hexagonal coordinate diagram of the present utility model

Principle of the present utility model is achieved in that 1), during the verification electric energy meter, respectively voltage circuit and the current loop of corresponding tested table of the voltage circuit of two standard scales, current loop when function translator WS is placed on the abc position; During the verification error, it is identical that its principle is surveyed three phase power with two element power, when function translator is cut respectively at ab, bc, during the ca position, the voltage circuit of two standard scales is respectively Vab, Vbc, Vca, during the position of a function translator of every switching, can read two data WA and WC at standard scale, can measure six data according to above-mentioned situation, can be at Vab, Vbc, proportional vertical line that draws on the Vca coordinate axle namely draws an intersection point, the direction that is connected to electric current I in this intersection point and the center of circle, if three bar line intersects a triangle, take barycenter oftriangle as intersection point, when two senses of current are similar to 120 ° so, illustrate that circuit in service is correct. When if two senses of current differ approximate 60 °, wherein a phase current mistake, as can be seen from the figure which phase reversal connection or mistake of explanation then.

2), in six data being surveyed when being hexagonal figure, occur always wherein that two data are negative values, so in instrument, establish the demonstration that two polarity switchs (Ja, Jc) have solved negative value.

Below in conjunction with accompanying drawing, specific embodiments of the present utility model is described in further details:

KWha, KWhc are two 0.2 grade WH-VA type standard kilowatt-hour meter among Fig. 1, and WS is a function translator, adopt three cuttves four to throw the porcelain switch, and KA, KC are starting switch, and (Ja, Jc) is polarity switch, and method of attachment as shown in Figure 1.

Use the utility model can be to test of kilo watthour meter and adjustment, and has straight survey hexagonal figure function, the utility model reasonable in design, method of operating is simple, the accuracy of detection height, the utility model can not checked electric energy meter under the power-off condition and adjusted and straight test cross angle figure, brings many conveniences to work in generating plant, alternating current institute, save lot of manpower and material resources, for enterprise brings certain economic benefits.

Claims

1, a kind of by kilowatt-hour meter (KWha) (KWhc), function translator (WS), starting switch (Ka) (Kc) and the real load of the electric energy meter checker (Jc) formed of polarity switch (Ja), the connected mode that it is characterized in that kilowatt-hour meter and switch is a kind of connected mode of changing position and polarity.