CN201319065Y - multifunctional test device - Google Patents

Abstract

The utility model discloses a multifunctional testing device, which is mainly composed of computer hardware and software systems and a program-controlled voltage source, a program-controlled current source, a CT open-circuit and short-circuit simulation unit, a wrong wiring simulation unit, a standard electric energy meter, and an error calculator integrated in the device. Composition, the computer hardware and software system controls all components to output voltage and current values or switch accordingly according to the requirements, the program-controlled voltage source is connected to the wrong wiring simulation unit, the program-controlled current source is connected to the CT open-circuit and short-circuit simulation unit, and the CT open-circuit and short-circuit simulation unit It is connected with the wrong wiring simulation unit, the wrong wiring simulation unit is connected with the standard electric energy meter and the inspected product, and the standard electric energy meter and the inspected article are connected with the error calculator. Under the control of the computer system, the device can verify and test the measurement performance of the tested product, and can also test the functions of the tested product such as voltage loss, current loss, wrong wiring judgment, CT open circuit and short circuit judgment.

Description

multifunctional test device

technical field

The utility model relates to a single-phase and three-phase multifunctional testing device, in particular to a device capable of testing the performance and functions of electric energy meters, load management terminals, customer site management terminals, and measuring device abnormality recorders.

Background technique

At present, the metering performance of equipment such as electric energy meters, load management terminals, customer site management terminals, and abnormal measurement recorders for metering devices is carried out by electric energy meter verification devices or other voltage and current power verification devices. Judgment, CT short circuit and open circuit and other functional tests are carried out manually, and some are not even tested.

Utility model content

In order to solve the performance and function test problems of electric energy meters, load management terminals, customer on-site management terminals, metering device abnormal recorders and other equipment, the utility model provides a new type of single-phase and three-phase multi-functional test device, which not only It can verify and test the metering performance of the above-mentioned equipment, and can also automatically test functions such as voltage loss, current loss, wrong wiring judgment, and CT short circuit and open circuit judgment.

The technical scheme that the utility model adopts is:

A multifunctional test device, including computer hardware and software systems and a program-controlled voltage source integrated in the device, a program-controlled current source, a CT open circuit and short circuit simulation unit, a wrong wiring simulation unit, a standard electric energy meter, and an error calculator. The computer hardware and The software system controls all components to output voltage and current values or perform corresponding switching according to the requirements. The program-controlled voltage source is connected to the wrong wiring simulation unit, the program-controlled current source is connected to the CT open-circuit and short-circuit simulation unit, and the CT open-circuit and short-circuit simulation unit is connected to the wrong-wiring simulation unit. Connected, the error wiring simulation unit is connected with the standard electric energy meter and the tested product, and the standard electric energy meter and the tested product are connected with the error calculator.

The CT open-circuit and short-circuit simulation unit is equipped with multiple sets of physical CTs.

The standard electric energy meter is connected to the same voltage and current input signals as the inspected product.

The standard electric energy meter outputs high-frequency electric energy pulse signals, and simultaneously provides voltage, current, frequency, and phase measurement data through the communication port.

The computer hardware and software system collects the voltage, current, frequency and phase data respectively measured by the standard electric energy meter and the inspected product through the communication port, and calculates the measurement error of the inspected product.

The communication port is RS-232 or RS-485 communication port.

The utility model can perform functional tests such as voltage loss, current loss, wrong wiring judgment, CT short circuit and open circuit while testing the performance of the inspected product. The performance and function tests are carried out in the same device, with simple structure, stable performance and accurate measurement. .

Description of drawings

Fig. 1 is the structural principle diagram of the utility model.

Detailed ways

Below in conjunction with accompanying drawing and specific embodiment the utility model is further described.

The reference signs are explained as follows:

1——computer hardware and software system 2——programmable voltage source

3——programmable current source 4——CT open circuit and short circuit analog unit

5——Miswiring analog unit 6——Standard energy meter

7——Inspected product 8——Error calculator

As shown in Figure 1, the computer hardware and software system 1 controls all components to output voltage and current values or perform corresponding switching according to requirements, the programmable voltage source 2 is connected to the wrong wiring simulation unit 5, and the programmable current source 3 is open and shorted to CT The simulation unit 4 is connected, the CT open circuit short circuit simulation unit 4 is connected with the wrong wiring simulation unit 5, the wrong wiring simulation unit 5 is connected with the standard electric energy meter 6 and the inspected product 7, the standard electric energy meter 6 and the inspected product 7 are connected with the error calculator 8 The above-mentioned functional units can be realized by adopting common technologies, and details will not be repeated here.

Its working principle is as follows: the program-controlled voltage source can change the amplitude, frequency and phase of the output voltage according to the commands issued by the computer system, and can also output a variety of harmonics, and can also change the amplitude, frequency and phase of the output harmonic voltage; program-controlled The current source also changes the amplitude, frequency and phase of the output current according to the commands issued by the computer system, and can also output a variety of harmonics, and can also change the amplitude, frequency and phase of the output harmonic current; the CT open circuit and short circuit analog unit is equipped with Multiple sets of physical CTs (current transformers), multiple sets of CTs are available for selection, including CTs of different types and specifications, and each set can choose three or two CTs according to the situation of the tested product to form a star or delta or V-V connection Form; Under the control of the computer system, the primary open circuit and short circuit of the CT and the secondary open circuit and short circuit of the CT can be realized through the switching switch such as the relay; the wrong wiring simulation unit can simulate common errors through the switching switch such as the relay under the control of the computer system Wiring form, including voltage wrong phase, current wrong phase, meter tail current in and out reverse connection, PT secondary disconnection, PT secondary polarity reverse connection, CT secondary short circuit, CT secondary polarity reverse connection, CT secondary open circuit etc., and can be set in combination; the standard electric energy meter and the tested electric energy meter are connected to the same voltage and current input signals; the standard electric energy meter outputs high-frequency electric energy pulse signals, and at the same time, it can pass through the RS-232 or RS-485 communication port Provide measurement data such as voltage, current, frequency, phase, etc.; the error calculator can receive the corresponding pulse signal input of the electric energy output by the standard electric energy meter and the tested product, and can perform error comparison to calculate the electric energy measurement error of the tested product; the computer system also The voltage, current, frequency, phase and other data measured by the standard electric energy meter and the tested product can be collected through RS-232, RS-485 or other communication ports to calculate the measurement error of the tested product. Under the control of the computer system, it can output voltage and current signals, and can simulate CT open circuit and short circuit, and simulate various wrong wiring. By comparing the standard electric energy meter with various measurement results of the inspected product, the measurement error can be obtained. The inspection can judge CT open circuit, short circuit, and wrong wiring, and compare with the setting form to judge whether the function of the inspected product is normal.

The utility model is not limited to the above-mentioned best implementation mode, and anyone can draw other various forms of products under the enlightenment of the present invention. But no matter any changes are made in its shape or structure, all technical solutions identical or similar to the utility model are all within its protection scope.

Claims (6)

1, a kind of multipurpose test system, it is characterized in that, comprise computer hardware and software systems and the inner integrated program-controlled voltage source of device, programmable current source, CT open circuit short circuit analogue unit, the false wiring analogue unit, standard electric energy meter, Error Calculator, described computer hardware and software systems are controlled all parts output voltage as requested, current value or carry out corresponding switch and switch, program-controlled voltage source links to each other with the false wiring analogue unit, programmable current source links to each other with CT open circuit short circuit analogue unit, CT open circuit short circuit analogue unit links to each other with the false wiring analogue unit, the false wiring analogue unit links to each other with standard electric energy meter and tested product, and standard electric energy meter and tested product link to each other with Error Calculator.

2, multipurpose test system according to claim 1 is characterized in that, described CT open circuit short circuit analogue unit disposes many groups CT in kind.

3, multipurpose test system according to claim 1 is characterized in that, described standard electric energy meter inserts identical voltage, current input signal with tested product.

4, multipurpose test system according to claim 1 is characterized in that, the electrical energy pulse signal of described standard electric energy meter output high frequency provides voltage, electric current, frequency, phase measurement data by communication port simultaneously.

5, multipurpose test system according to claim 1, it is characterized in that, described computer hardware and software systems are gathered voltage, electric current, frequency, the phase data that standard electric energy meter and tested product are measured respectively by communication port, and calculate the measuring error of tested product.

According to claim 4 or 5 described multipurpose test systems, it is characterized in that 6, described communication port is RS-232 or RS-485 communication port.

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