Spinup #211 three phase fault
Posted 07 April 2012 - 05:30 PM
Here is the circuit that they give it the answer.
According to the symmetrical components by blackburn book this is a three phase to ground fault not a three phase fault. The zero sequence network should be left as an open circuit not closed.
Dose the industry consider these the same that a three phase to ground fault is usually assumed when talking about a three phase fault or have I miss understood something?
Posted 07 April 2012 - 11:10 PM
but if someone else could clarify it would be a huge help!
Posted 12 April 2012 - 01:09 PM
211#1 does appear to be a three-line-to-ground fault.
211#3: no idea. If 0 and 2 were flipped, it would be line-line?
211#4: two-lines-to-ground fault
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