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Negative Phase Sequence

Cameron O'Connell
I have been looking at a calculation formula someone sent to me for the negative phase sequence of an unbalanced three-phase generator. the calculation looks at the three loads applied to L1,L2 & L3. the formula gives the negative phase sequence which should not be more than 20% of the rated maximum current.


I have searched low and high for the source of this information and I can't find it anywhere, would anyone know if it is correct and/or where the information comes from as i have no contact details form the person who originally gave it to me.
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    I think Cameron is talking about the angular physical separation of the individual pole winding groups, not the vector angular separation of the phases of the supply circuit. For a two-pole alternator the separation would be 180° and such a generator would rotate at 50 revolutions per second or 3000 rpm at 50 Hz. A 12-pole alternator would rotate at 500 rpm.
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    I think Cameron is talking about the angular physical separation of the individual pole winding groups, not the vector angular separation of the phases of the supply circuit. For a two-pole alternator the separation would be 180° and such a generator would rotate at 50 revolutions per second or 3000 rpm at 50 Hz. A 12-pole alternator would rotate at 500 rpm.
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