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Rajaneesh said:Hi All,
Is there any simple circuit to identify the phase reverse or phase sequence change in a 3 phase (star connected) 440V system?
Thanks in advance
RODALCO said:What do you want to prove !
The phase sequence is clockwise or anti-clockwise. The only time when a change may happen is when the cables get transposed when a transformer is replaced or a generator is inserted and appropiate before and after tests were not done.
Get a phasesequence meter ( for continuous duty ) with optical indicators and sense these with an optocoupler to detect rotation and trigger your alarm or relay.
Cheers, Raymond