Question:
Switch on power supply while working with the transformer.
Switch on power supply while working with the transformer.
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The golden rule of electrical maintenance: Always de-energize, lock out, and ground the primary and secondary connections of a transformer before initiating any maintenance or diagnostic work.
Updated On: Jun 18, 2026
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Solution and Explanation
Step 1: Evaluating the Safety Hazard:
Working on a transformer with the power supply switched on presents an immediate and life-threatening risk of high-voltage electric shocks, arc flashes, and short circuits.
Step 2: Safety Protocols:
Standard safety protocols mandate that any transformer under maintenance must be completely de-energized. The high-voltage and low-voltage supply breakers must be opened, locked out, and tagged out (LOTO). All windings must then be grounded to safely discharge any residual inductive or capacitive charge before technicians touch any part of the system.
Step 3: Conclusion:
Working on an active, energized transformer is extremely dangerous and violates basic safety standards. The statement is False.
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