What is the function of the automatic instrument transformer calibration station?

Automatic transformer calibration bench is a new generation of transformer calibration device developed and developed, using the latest virtual instrument design ideas, users only need to operate the virtual instrument interface on the computer screen through the mouse and keyboard, input transformer type, range, accuracy level, capacity, power factor and other parameters, you can complete the automatic test of current transformer and voltage transformer, and analyze the test results, calculate and database management, and can print various records and certificates according to the needs of users. This device is ideal for power systems and other units engaged in transformer verification.

1.Through the operation of the computer mouse and keyboard, the fully automatic measurement of current and voltage transformers can be completed according to the requirements of the regulations. 2.

The use of dual voltage regulators and double stepper motors, and the optimized stepper motor control scheme, the fixed-point is fast, stable and accurate, and completely solves the problem of 1% fixed-point of S-class transformer.

3.The voltage and current load box are automatically switched, without manual calculation and manual gear shifting, which greatly improves the test speed and avoids the wrong gear selection.

4.With Windows as the operating platform, it has powerful functions and beautiful interface, and supports a variety of Chinese character input methods and a variety of printers.

5.The attached transformer calibrator can be used separately from the table, which greatly facilitates debugging, verification and on-site use.

6.It has perfect alarm and over-current protection functions.

7.It can be used as a power frequency withstand voltage test bench.

Check whether the accurate grade of the transformer is qualified.

The "automatic transformer calibration bench" is composed of several parts, such as the transformer calibrator, the current load box, the control cabinet, and the special test bench for the current transformer. It mainly tests the error of current transformer and voltage transformer. Let's take the "GYHT-6 Automatic Transformer Calibration Bench" as an example.

When buying a "transformer calibration station", you must pay attention to a few points:

1. The "automatic transformer calibration station" can measure up to 12 current transformers of any ratio in 3-5 minutes.

2. The "automatic transformer calibration bench" is equipped with 1A and 5A standard current transformers, the current load box is equipped with 1A and 5A load values, and the voltage load box is equipped with 100V and 100 load values, which can basically meet the requirements of users. The load bank can be switched automatically during measurement.

3. The "automatic transformer calibration station" can also measure the procedures and non-procedures of the transformer, and the user can specify the measurement of any percentage point during the measurement.

Pay attention to the above points, you can buy a satisfactory "automatic transformer calibration station".

The former is calibrator, standard current and voltage transformer, booster voltage booster, voltage regulator, switching device, automatic test software, load box, etc.

Electronic transformer calibration software is divided into three functional interfaces, namely error verification, parameter setting, communication settings, this article takes the WD-807 transformer tester of Wugao Electric Testing as an example, and briefly introduces the uproar function of each functional interface and the operation method.

1. Communication settings.

In this case, this interface does not need to be set up, the serial port will be automatically opened when the software is opened, and the settings need to be changed only when you need to change the settings, or when you conduct a communication test.

The data receiving area displays the received data, communication frames, etc., and the data to be sent is stored in the data sending area, and the data here is sent to the control module of the calibrator.

Setup Instructions: Serial port line without number: Select the serial slogan used to communicate with the calibrator control module, fixed to COM2.

Baud Rate: Select the baud rate to be used for communication, which is 57600 by default.

Check bit: You can select odd check, even check, no check, and no check, and no check is selected by default.

Stop Bit: Select the number of stop bits for serial communication, which is 1 stop bit by default.

Here you set the display mode of the receiving area, the normal display mode displays the received content in ASIC character mode, and the hexadecimal mode displays each byte of received data in hexadecimal mode.

The above area is used to set the data input type in the sending area, the normal input mode can input characters, and the hexadecimal input mode can only input data that conforms to the hexadecimal system.

In addition to maintaining the advantages of high stability and accuracy, the automatic current transformer calibration bench has introduced some new ideas on the original high level of intelligence: the large-screen Chinese character LCD display is adopted, and the LCD screen backlight control means are adopted, so that users can easily choose the backlight according to the ambient light, which completely solves the problem of unclear outdoor digital tube outdoor; Directly provide the test value and integer value of each point, and directly prompt the deviation (including the variation difference); Provide standard test methods for S-class and light load and the corresponding automatic control function of the operating station; Provide asset number entry and storage functions to facilitate on-site data microcomputer management; Direct display of on-site CT test wiring diagram; Only four buttons are required for all functions to operate.

1.Display method: 320 240 Chinese large LCD screen.

2.Storage function: 40 sets of PT and CT data, which can store the error data of 1 point of CT;

3.Online function: can be connected to the computer and the corresponding software;

4.Printing function: real-time query and printing.

Series Chinese large liquid crystal transformer calibrator, and used for verification accuracy level secondary to 10, rated secondary current is.

5A, 1A and current transformers and voltage transformers with rated secondary voltage of 100V, 100V, 150V (100 3V, 220V).

The measurement results are displayed directly digitally, and can be equipped with RSC232 interface for users to easily connect to a computer.

2.When verifying the transformer, the instrument can measure the impedance of the secondary circuit of the transformer under test or the active component and reactive power of the admittance at any time.

Heft. 3.When calibrating a transformer, the instrument automatically indicates the polarity. When the polarity is wrong, the instrument can automatically cut off the differential current (differential pressure) back.

to ensure the safety of the instrument input circuit. And send out an audible and visual alarm to remind the inspectors to pay attention.

4.The instrument can be used as a Cartesian coordinate system AC potentiometer to measure small AC current or small AC voltage.

5.The instrument can measure the secondary voltage drop of the voltage transformer together with the isolated PT and the operating box.

6.When verifying the transformer, the instrument can use a standard current transformer or a standard voltage transformer as a standard, or it can use two-stage electricity.

Flow transformers, two-stage voltage transformers or inductive voltage dividers are used as proportional standards.

7.The instrument can be periodically calibrated using either the integral method or the component method.