How can you confirm the isolation before performing the preventive maintenance of a 11 kV power transformer

Question

Accepted Answer

Isolation can be confirmed by using a voltage detector, lockout/tagout procedures, and visual inspection.

Use a voltage detector to ensure that there is no voltage present in the transformer.
Follow lockout/tagout procedures to prevent accidental energization.
Visually inspect the transformer to ensure that all switches and breakers are in the off position.
Check the grounding system to ensure that it is properly installed and functioning.
Perform a phase rotation test to ensure that the transformer is properly connected.
Verify that all warning signs and labels are in place and legible.

Accepted Answer

By fallow  LOTO procedure step by step,( by otatin isolation confirmation certificate from operation)

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