Saturated or Unsaturated Impedance

[davva]

I've tried a search on this forum to find some of the answers.

When considering electrical calcs, should unsaturated or saturated generator reactance be used for:-

1. Harmonic Analysis

2. Short Circuit Calcs

3. Motor Starting Volt drop calcs

From what I've read there appears to be an answer to 2 and 3 above, but not to 1...

1. ??? (unsaturated data?)

2. Saturated data

3. Unsaturated data

I stand to be corrected on my interpretation on the above answers!

 

[motorspert]

davva
You are correct

Generally speaking saturated values are used where the current is high - ie fault calculations. Unsaturated values are used up to rated current ie motor starting calcs. I would use unsaturated for harmonic calcs.