ZC-203C special transformation ratio tester is professional transformation ratio test equipment, which can be used for three-phase transformer test of power system, especially suitable for Z-winding transformer, rectifier transformer and balance transformer test. The instrument adopts large screen liquid crystal display. It has friendly man-machine interface, perfect function and convenient operation. It is an ideal instrument for power system, transformer manufacturer and railway electrical system to test transformer ratio, group, polarity and angle.

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 tapping gear of transformer is used to automatically judge the current test gear.

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.

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.