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The purpose and use points of the ratio tester

time:2020/12/11   source:华天电力  reading:247 time

The purpose of the ratio tester


The transformation ratio test is one of the routine test items in the process of transformer manufacturing and maintenance. The transformation ratio tester is designed with modern electronic technology, and the operation of the instrument is controlled by a single-chip microcomputer. The large-screen LCD screen can directly display the three-phase transformation ratio, error, tap position and other information. The instrument is designed with the tap winding longitudinal test function, which can automatically determine the tap position and store the corresponding transformation ratio value. The instrument is suitable for the transformation ratio test of various wiring group transformers including Z-type.


Multi-Function Transformer Turns Ratio Tester (TTR).png


The main points of the use of the ratio tester


1. During the measurement, people should not touch the sample.


2. If the test line is short-circuited and the high and low voltage connections are reversed, the fuse will be blown. After the fuse is blown. If you are measuring, stop after displaying "Measuring, please wait". Please turn off the machine, replace the insurance with the same capacity, and retest.


3. The connection should be well protected, and the instrument should be well grounded.


4. The working place of the instrument should be far away from strong electric field, strong magnetic field, and high frequency equipment. The less interference from the power supply, the better, and the lighting wire should be used. If the power interference is still large, you can charge the instrument with AC clean power cord. The capacity of the AC purification power supply is greater than 200VA.


5. When the transformation ratio tester is working, if the liquid crystal display is disordered, pressing all the buttons will have no response. Or the measured value is far from the actual value, please press the reset button, or turn off the power, and then operate again.


6. If the display has no characters displayed, or the color is very light. Please adjust the brightness potentiometer to a suitable position.


7. Working in a dark place, you can turn on the backlight. To reduce the power consumption of the display, the backlight is not very bright.

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