Should unused current transformers associated with potentially energized circuits be short-circuited?

Unused current transformers (CTs) associated with potentially energized circuits should not be short-circuited because doing so can create safety hazards and operational issues. Current transformers are designed to measure alternating current (AC) and produce a corresponding output signal. If these transformers are left open-circuited while energized, it could lead to dangerously high voltage levels developing across their secondary terminals, which poses a risk of electric shock or equipment damage.

In scenarios where the CT is unused, simply short-circuiting it, regardless of the presence of power, does not eliminate the potential risk associated with incorrect configurations or unexpected energization. Removing unused CTs from the circuit or ensuring they are properly terminated according to standards is the safest approach. Continuous adherence to proper procedures helps ensure the safety of both personnel and equipment in electrical installations.