ATB01 PCT Auto‐Test Box for PCT200i/PCT200Ai CT/PT Tester Introduction ATB01 is an accessory for the PCT200i/PCT200Ai CT/PT Tester which allows automatic testing of multi‐ratio current transformers. ATB01 is connected to all taps of the current transformer and to the PCT200i/PCT200Ai CT/PT Tester. This allows the transformer ratios of all winding combinations to be automatically tested with the PCT200i/PCT200Ai CT/PT Tester. Main Features • Up to six connections for the secondary side of the current transformer • Automatic check to ensure correct wiring • Separate connections for primary resistance measurement and measurement of the secondary burden • Fully automated testing with no need for rewiring Applications Testing multi‐ratio current transformers No.139 Jinghai Third Road, BDA, Beijing, China. 100176 Tel: +86 (10) 5908