Rules and Guidelines
Want to participate in the discussions? Please read our Community Rules and Guidelines. Need some help? Visit Support and Answers.

  • State Not Answered
  • Locked Locked
  • Replies 7 replies
  • Subscribers 15 subscribers
  • Views 561 views
  • Users 0 members are here
Options
You may also be interested in
This discussion has been locked.
You can no longer post new replies to this discussion. If you have a question you can start a new discussion

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.
Inps.png
Parents
  • 0
    I dont think an unbalanced load can exist for long in 3 phase , one story I heard was that on motors a phase drop out is about the most dangerous thing and perhaps spectacular thing you might be lucky enough to live to tell the tale about ,in electrical work on large motors/pumps. The 20% figure perhaps suggests a partial failure , but my understanding is when a phase drops out , time is pretty short
Reply
  • 0
    I dont think an unbalanced load can exist for long in 3 phase , one story I heard was that on motors a phase drop out is about the most dangerous thing and perhaps spectacular thing you might be lucky enough to live to tell the tale about ,in electrical work on large motors/pumps. The 20% figure perhaps suggests a partial failure , but my understanding is when a phase drops out , time is pretty short
Children
No Data

Community Rules & Guidelines