Capacitor hook up for star delta motor starter 1

[testtech]

What is the proper method of connecting power factor correction capacitors to a star delta motor starter? Is there any NEC reference for this (I could not find anything in NEC 460)? The motor in question is 3 phase, 208V, about 500 HP.

 

[waross]

I agree with you here!

However, my concern when starting this thread was to explore the potential for the caps to produce damaging transients. At this point, it appears that if they terminate the caps to load side of the M1 contactor and then run the capacitor leads through the CTs, they will have an installation that meets Code requirements and does not contribute any greater transients than the original system.

Bill
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"Why not the best?"
Jimmy Carter