Transformer Differential Relay Testing

The transformer differential relay testing  is important because this is used to prevent the failures or faults of the transformers. This test helps in improving the overall performance of the transformers. The transformer differential relays are particular devices that have the main purpose of protecting the transformer from any unusual faults. Therefore, these relays also needed to be tested frequently, in order to ensure that it is in good working condition.   On the other hand, a sort of insulation resistance test called the polarisation index test  (PI) is used to assess the insulation in electrical equipment such as transformers, motors, generators, and cables. When conducting a PI test, a high-voltage DC source is applied to the item being tested, and the insulating resistance is tracked over time. The PI test aids in detecting the presence of moisture, pollution, or other flaws that could harm electrical equipment's insulation. Low PI values suggest that the insul...