Which tests should be performed on the distribution transformer before installation? What are the two inherent errors in a current transformer?

Distribution transformers are an essential component of the electrical power distribution system, and their proper functioning is crucial for the efficient and reliable supply of electricity to consumers. Therefore, before installation, several tests should be performed on the distribution transformer to ensure its proper functioning and safety. The following are the tests that should be performed on a distribution transformer before installation:

1. Transformer turns ratio test: This test is performed to ensure that the turns ratio of the transformer is as per the design specifications. It involves measuring the ratio of the primary to secondary winding turns of the transformer.

2. Insulation resistance test: This test is performed to ensure that the insulation of the transformer __________ _______ _________ _______ _______ _______ ____ ______ ______ ______ _______.
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