3 phase auto electrical transformer turns ratio ttr tester

128B turn ratio tester can check the correctness of transformer turns ratio, the condition of the tap changer, whether the transformer has inter-turn short circuits, and whether the transformers can run in parallel.
Turn ratio measurement range: 1-10000
Turn measurement accuracy: ± 0.1% + 2 words (0.9 ~ 500),
                             ± 0.2% + 2 words (501 ~ 2000)
                             ± 0.3% + 2 words (2001 ~ 10000)
Working power: AC 220V ± 10%  Power frequency: 50Hz ± 1Hz