Adjust the tap should be first exit from the grid transformer

Distribution transformer no-load voltage regulation system, so adjust the tap should be first out of the transformer from the grid, to ensure that no power distribution  mcb circuit breaker , and make the appropriate security measures. (2) Unscrew the weatherproof cover the head screws, remove  power transformers . (3) before switching tap tap to see the location of each marker to distinguish gear. There are three general distribution transformers gear: 2 (Ⅱ) block represents the distribution transformer rated voltage, 1 (Ⅰ) distribution transformer block represents 105% of the rated voltage, 3 (Ⅲ) block represents 95% of the rated voltage distribution transformers .