Register to reply

Negative sequence (Symmetrical component)

by sarayut
Tags: component, negative, sequence, symmetrical
Share this thread:
sarayut
#1
Apr30-12, 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.
Phys.Org News Partner Engineering news on Phys.org
New filter technology uses inert gas to bore holes in high-quality steel
Augmented reality helps in industrial troubleshooting
How wireless technology can dramatically improve ship safety
SirAskalot
#2
Apr30-12, 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
sarayut
#3
Apr30-12, 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
Non-Negative, 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