Originally Posted by
rob2290
Hello,
I have a similar question and I will jump on this thread and ask here since it is on the same topic...
I also have 3 Dyn4 H01 drives and my shop runs on 3-phase 240v. Voltage measures at L1 / R= 120v to ground, L2 "wild leg" / S = 215v to ground, L3 / T = 120v to ground (L1 to L3 = 240v, L1 to L2 = 245v, L2 to L3 = 245V). So my question is, will it be best / safer running the drives on 2 legs of the 3 phase as in single phase L1 and L3 or will I be okay with running them on full 3 phase wired L1=R L2=S L3=T.
I have been running them for months on the full 3 phase as I thought it was acceptable to do so... I have not had any issues running them this way but I will rewire to run on two legs if that is the proper way and if it is better for the drives in the long term.
I am unaware of a 3 phase power option which does not have a high leg. Please help me understand how one would be able to run a Dyn4 on 3 phase without hitting the 140v max that is specified in the manual. I dont know of any 3 phase source that does not have a high leg above that voltage. That is why I assumed 240v 3 phase is ok. The manual states to keep voltages between any R-S-T-L1-L2 terminal below 240v which that is what my voltage meter reading are. Max 244v between R->S and S->T the rest of the readings are under 240v (R->T, L1->L2 etc..)
I do have a main noise filter, and also individual noise filters for each drives L1 L2. Of course also fuses and breakers for each drive.
Much appreciated.
Thanks,
Robert