Phase Sequence Indicator Circuit Diagram. We have three phase system and by convention we write three phases as ryb. Rotating type phase sequence indicators.
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An imaginary viewer see figure a left will encounter first phase a then b then c again a then b like wise the sequence is abcabcabc. The device whose phase sequence is used to be known is connected to the static phase sequence indicators. If the lamp 1 is dim and the lamp 2 glows brightly then the phase sequence of supply is ryb.
If the lamp 1 is dim and the lamp 2 glows brightly then the phase sequence of supply is ryb.
In the diagram just look at the abc anti clock wise phase sequence. Now what will happen to direction of rotation of. Here the phasors are rotating in anti clock wise direction. The device whose phase sequence is used to be known is connected to the static phase sequence indicators.
