Register to reply 
Negative sequence (Symmetrical component) 
Share this thread: 
#1
Apr3012, 05:30 AM

P: 2

I'd like to know how do i find I2 (Negative sequence current) if I know Ia, Ib and Ic but don't know angle (in normal system_not fault)? My system's 3 phases 3 wires.



#2
Apr3012, 01:25 PM

P: 141

You need to specify what you mean by "normal system_not fault"?
Is the load balanced? If so, you know the angles relative to each other. You can then use the symmetrical transformation to find if there is a negative sequence current. http://en.wikipedia.org/wiki/Symmetrical_components 


#3
Apr3012, 08:45 PM

P: 2

Thank you very much for answer!!!!, "Normal system_not fault" mean imbalance situation in distribution system. For example Ia= 85 A, Ib= 92 A and Ic= 90 A. I'd like to know I2 for set the I2 pick up to detect low fault current.



Register to reply 
Related Discussions  
Proving covariant component is physical component times scaling factor  Calculus & Beyond Homework  1  
Why is the Time component in the Space Time Interval negative?  Special & General Relativity  26  
Component vectors positive or negative and angles positive or negative  Introductory Physics Homework  5  
NonNegative, Decreasing Sequence: If series converges then lim n*a_n = 0  Calculus & Beyond Homework  3  
Component of Fibonacci Sequence  Set Theory, Logic, Probability, Statistics  1 