Ratio testing is one of the routine test items in transformer manufacturing and maintenance. The BBC6638 ratio tester is designed with modern electronic technology, and its operation is controlled by a microcontroller. The large LCD screen can directly display information such as three-phase ratio, error, and tap position. The instrument is designed with a longitudinal test function for tap windings, which can automatically determine the tap position and store the corresponding ratio values. This instrument is suitable for ratio testing of transformers with various connection groups, including Z-type.
Main Functions
1. Automatically measure connection group
2. Automatically perform group transformation, can directly measure the ratio of all transformers
3. Automatically switch phase sequence
4. Automatically switch range
5. Automatically calibrate the meter
6. After inputting the standard ratio, it can automatically calculate the relative error
7. After one measurement is completed, the test voltage is automatically cut off
8. Set data, measurement results are automatically saved, and previous data can be viewed
2. If the test leads are short-circuited or the high and low voltage connections are reversed, the fuse will blow. After the fuse blows, if a measurement is attempted, the display will stop after showing "Measuring, please wait!". Turn off the power, replace the fuse with one of the same capacity, and retest.
3. Ensure good contact of the connections. The instrument should be properly grounded!
4. The working place of the instrument should be far away from strong electric fields, strong magnetic fields, and high-frequency equipment. The less interference in the power supply, the better. If the power supply interference is still significant, the instrument can be charged via an AC purified power line. A capacity of more than 200VA for the AC purified power supply is sufficient.
5. During operation, if the LCD display is disordered, all keys are unresponsive, or the measured values differ greatly from the actual values, press the reset key or turn off the power and restart the operation.
6. If the display shows no characters or the characters are too faint, adjust the brightness potentiometer to a suitable position.
7. When working in dark places, the backlight can be turned on. To reduce the power consumption of the display, the backlight is not very bright.
8. The instrument should be stored in a dry and ventilated place.
Note: The above information and technical parameters are compiled and released by Yangzhou Darui Electric Co., Ltd.
