Oops I said that backwards, I meant a 23% voltage drop. I made one last ditch effort to see what it would take for the vendor to up the SCCR, hopefully they can do something because I really do not want to go with the transformer option. Jraef, thanks for the suggestion on the reactors, I...
Unfortunately the equipment was consciously ordered with the lower SCCR without any electrical input. That made me look at our other chiller installations and they too are rated at 5kA SCCR. I am definitely going to add that line to all our specifications in case we (electrical guys) don't get...
Hi,
We've run into an issue where the chiller we bought is rated at 5kA SCCR and the available short circuit current at the switch gear is 52kA. The manufacturer says there isn't anything they can do to change the rating, we can't modify it ourselves without losing our warranty, and the...
Jraef, out of curiosity, how would one properly design the transformer for being back fed and size the starter? Is the worry from the motor back feeding? For the soft starter sizing, would I just calculate the transformer losses and add that on top of the whatever is required for the motor...
Thanks and I appreciate you responding jraef. You know, for this configuration being done all the time, I couldn't find anything on the web about it. I think I will go with the MV soft starter route. I wouldn't even know where to start in properly designing the transformer and sizing the soft...
We have a 4160V 600HP air compressor that we need to provide power to and only a 480V source available. It was determined that a soft starter will be required in order to start the compressor. In the interest of saving money, would it be possible to utilize this configuration:
480V Source ->...
