Yes, I am talking about pole-pass frequency showing a significant dB spike in the test result. I'm not too familiar with MCSA, but I am told this is an indication for a possible cracked rotor bar, causing higher resistance, less bar current and imbalance.
I would expect this too. But, the...
We've recently had some of our Die-Cast Aluminium rotors pre-commissioned by another company. After doing a Motor Current Signature Analysis (MCSA) they found an imbalance in one of the rotor bars. The other rotors that passed the test, were subjected to both light and heavy loads. This rotor...
I am currently designing the retrofit for an old panel. I've never seen this symbol for a switch before and cannot see what state it is in from the picture. Can anyone help on this?
http://files.engineering.com/getfile.aspx?folder=13a04dda-4e28-4e87-b46a-4cbb3b05476f&file=Untitled.png
