Portable Transformer Ratio and Vector Group Tester
Darui Electric recommends:
Portable Transformer Ratio and Vector Group Tester Performance Features:
1. Dual AC/DC power supply: powered by lithium battery or 220V AC charger with automatic adaptation.
2. A single charge allows continuous measurement of 100 transformers' ratio and vector group.
3. Intelligent charging management, remaining battery display, low battery alarm, automatic backlight adjustment to save power.
4. Full three-phase sinusoidal inverter power output with automatic voltage adjustment, featuring soft start and soft stop functions, thus providing fast testing speed and high accuracy.
5. Testing functions for ratio, vector group, and polarity of three-phase transformers, single-phase transformers, PTs, and Z-type transformers.
6. Blind test function: allows ratio and vector group testing without knowing the high/low voltage connection modes.
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 testing range, up to 10000.
11. High-low voltage reverse connection protection function.
12. Output short circuit protection function.
13. Non-volatile clock and date display; data storage methods include local storage and USB drive storage. Local storage can save up to 500 test records and can be transferred to a USB drive; data stored on USB drive is in Word format, which can be directly edited and printed on a computer.
14. Thermal printer printing function, fast and silent.
15. Compact size, light weight, easy to carry and use.
Portable Transformer Ratio and Vector Group Tester Purpose of Ratio Test
1. Check whether the ratio matches the nameplate value to ensure the required voltage transformation is achieved.
2. Check whether the position indicated by the voltage tap changer is correct.
3. Check the turns ratio of each coil to determine if there is an inter-turn short circuit in the transformer.
4. Measure the unbalance of the transformer ratio of a three-phase transformer itself.
5. Provide the accuracy of the transformer ratio to determine whether transformers can operate in parallel..
Note: The above information and technical parameters are compiled and released by Yangzhou Darui Electric Co., Ltd.
