ZC-203C The special transformer ratio tester adopts large screen LCD display, full Chinese menu and Chinese character printing output. It has friendly man-machine interface, perfect function and convenient operation. It can be used for three-phase transformer test of power system, especially for Z-winding transformer, rectifier transformer and balance transformer test. It is a transformer transformer transformer for power system, transformer manufacturer and railway electrical system Ideal instrument for ratio, group, polarity and angle measurement.

1. How to use the rotating mouse

In the digital input mode, the number can be changed by turning left or right. The down key can select the current shift. In the menu selection mode, the cursor can be moved by turning left or right. The down button is the confirmation key.

2. Introduction of main interface

The main interface is shown in the figure below, which is composed of four modules.

1) Transformation ratio test: in this menu, the transformation ratio, error and angle difference of single-phase transformer and three-phase transformer can be measured.

2) Data browsing: browse, print and delete the stored data.

3) System settings: set the current system time, system parameters, etc.

4) Manufacturer setting: this function is used for production adjustment and trial use.

In the main interface, the power and voltage of the current system are displayed in real time. Because two batteries are used in the system, the interface is divided into positive voltage and negative voltage. When the power of the instrument is insufficient, the interface will prompt "charge if the power is insufficient!" At this time, it should be shut down and charged in time.

3. Introduction to transformation process

1) Conduct correct wiring according to the corresponding wiring diagram in the test panel or instruction manual.

2) Select the transformation ratio in the main interface to display the ratio test setting interface, as shown in the following figure:

This page saves the setting value of the last test, check and modifies the setting value in this page to make it consistent with the current test transformer.

Number: the number of the tested object, which is used for the management of the tested object and the preservation and identification of the test record.

Type: the type of the tested object, including three-phase, single-phase, Scott and reverse Scott transformers, and single-phase for voltage transformer ratio test.

High voltage and low voltage connection: this option will appear when three-phase transformer is selected. It is only used as an auxiliary item for displaying and printing groups and does not affect the test results.

Rated tapping: The rated tap gear of transformer is used to judge the current test gear automatically.

Each gear: the voltage regulation percentage of transformer, which is used to automatically judge the current test gear.

Rated transformation ratio: It means the standard transformation ratio of transformer at rated gear. If this setting item is not set correctly, it will affect the test result of ratio difference. Please refer to the transformer nameplate when setting the above parameters.

3) In the above figure, select "measure" with the cursor, and press the confirm key to enter into the following automatic step-up page of variable ratio test:

In this step-up interface, the instrument will automatically rise to the appropriate voltage according to the transformation ratio of the transformer, and test the transformation ratio, error and angle difference. This process will be completed within 10 seconds. If there is an error in the test process, an error message will be prompted, and the test result page will appear as shown in the following figure.

The "save" on the page saves the current results to the random memory; the "print" button prints the current test results through the printer.

Note: the error at this time is the error between the measured transformation ratio and the current transformation ratio.

In the figure above, press "retest" to retest the tested object, and press "exit" to return to the main interface of the previous system function.

4. Data browsing description

1) Select "data browsing" in the main interface. If there are test results stored in the device, the following data browsing interface will be displayed:

2) In this interface, all stored data are stored in the order of time from new to old. During browsing, you can press "previous" and "next" to turn the page, "print" can print the currently displayed test results, and press "delete" to delete useless data.

5. System settings

1) Select "system settings" in the main interface, and select the following interface to display:

2) In the above figure, you can modify the date and time of the system. After the modification, press "OK" to save the current setting, and "clear record" can delete all the records stored in the current instrument.