Hi,
I am reading some books trying to understand how physically they rotate in the same direction as the positive sequence components but in the reverse sequence. How can that even be. If a machine rotor under normal load conditions is rotating CCW with ABC sequence. How can the machine continue to rotate in CCW direction but with ACB sequence.
The book:
My confusion is from the below page. How the phase sequence is reversed? As I understood from page#58 above as highlighted in red "The connections from a, b, c to a, c, b or vice versa can generally be made by completely interchanging phases b and c for both the equipment and the connections." Does this mean that they interchange the phases! it cannot be this. So, how phase sequence is reversed?
Protective Relaying: Principles and Applications, Fourth Edition
By J. Lewis Blackburn
2014 by Taylor & Francis Group, LLC
International Standard Book Number-13: 978-1-4398-8812-4 (eBook - PDF)
I am reading some books trying to understand how physically they rotate in the same direction as the positive sequence components but in the reverse sequence. How can that even be. If a machine rotor under normal load conditions is rotating CCW with ABC sequence. How can the machine continue to rotate in CCW direction but with ACB sequence.
The book:
My confusion is from the below page. How the phase sequence is reversed? As I understood from page#58 above as highlighted in red "The connections from a, b, c to a, c, b or vice versa can generally be made by completely interchanging phases b and c for both the equipment and the connections." Does this mean that they interchange the phases! it cannot be this. So, how phase sequence is reversed?
Protective Relaying: Principles and Applications, Fourth Edition
By J. Lewis Blackburn
2014 by Taylor & Francis Group, LLC
International Standard Book Number-13: 978-1-4398-8812-4 (eBook - PDF)