how can LED bulb indication work correctly without CT OR PT for 3 phase indication if one is cut then it will show the correct indication?
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Answer Posted / Munish Kumar Gautam
LED bulbs used for three-phase power indication might have a specialized design that allows them to work correctly even without Current Transformers (CT) or Potential Transformers (PT). This is possible due to the use of a phase-sensitive indicator circuit inside the LED bulb, which can determine the phase by analyzing the voltage waveforms. If one phase is cut, the circuit may still show the correct indication by detecting the change in the remaining phases.
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