AC/DC Transformer Ratio and Vector Group Tester
Darui Electric recommends:
Using a transformer ratio bridge to measure the transformer ratio is a cumbersome process with a narrow measurement range, which no longer meets the fast-paced and high-efficiency requirements of modern measurement. To this end, modern electronic technology has been adopted to develop a new generation of ratio and vector group tester. It is small in size, light in weight, high in accuracy, and good in stability.
AC/DC Transformer Ratio and Vector Group Tester Performance Features
1. Dual AC/DC power supply: powered by lithium battery or 220V AC charger with adaptive switching.
2. A single charge can continuously measure the ratio and vector group of 100 transformers.
3. Intelligent charging management, remaining battery level display, low battery alarm, automatic backlight adjustment to save power.
4. Full three-phase sinusoidal inverter power output, automatic output voltage adjustment, with soft start and soft stop functions, thus fast testing speed and high accuracy.
5. Testing functions for three-phase transformers, single-phase transformers, PTs, and Z-type transformers: ratio, vector group, and polarity.
6. Blind testing function, i.e., testing ratio and vector group without knowing the high and low voltage connection methods.
7. CT ratio and polarity testing function.
8. Phase angle difference testing function for single-phase testing.
9. Tap positions can be tested up to 197.
10. Wide measurement range, up to 10000.
AC/DC Transformer Ratio and Vector Group Tester Technical Specifications:
1. Ratio measurement range: 0.9~10000.
2. Fast measurement speed: completes three-phase testing within 1 minute.
3. Measurement accuracy: high voltage side voltage measurement accuracy 0.05%
low voltage side voltage measurement accuracy 0.1%
phase angle measurement accuracy: 0.1°
4. Ratio measurement accuracy: 0.2% (0.9－1000)
0.3% (1000－3000)
0.5% (3000－10000)
5. Weight: 3Kg
Common Problems and Solutions:
Common Fault
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Fault Analysis and Solutions
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No display on power-on
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1) Poor power plug contact or damaged fuse 2) LCD contrast needs adjustment 3) Instrument power board fault
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Inaccurate test results
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1) Check if parameter settings are correct 2) Internal A/D board fault
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Printer does not print
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1) Internal computer board or power board fault 2) Check if the printer connector is loose, and if the paper is loaded correctly (thermal paper can only be printed on one side) 3) Printer itself faulty
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Note: The above information and technical parameters are compiled and released by Yangzhou Darui Electric Co., Ltd.
