With that length of 700ft between the motor and the drive you would most likely benefit from a line reactor installed on both line and load side of the VFD.
The line side reactor would help protect the drive from harmful power conditions. It would also cut down on the harmonics introduced onto...
That's excatly what I was expecting to hear. It seems that there is no convenient way to protect these.
However, I did find out that Ferraz Shawmut came out with a High Speed Class J fuse (HSJ). They claim that it combines the low I^2t of a semiconductor fuse and branch circuit performance...
Is anybody familiar with fusing Soft Start controllers? I ususally fuse my motors at 125-150% of the motor's nameplate FLA. Due to the high cost of semiconductor fuses, most people fuse soft starts with regular fuses. What are the best semiconductor fuses to use with soft starts and how...
I always use input line reactors on Inverter installations. They are cheap insurance. Check out MTE Corp. They have a user freindly chart for selecting reactor sizes. A 5% usually will do the trick. Depending on how far away you put your motor from your drive, an output line reactor may also...
I need to hook up a machine at 208-240V 3ph using a transformer to step-down the voltage from 480V. There is not a convienient place for me to add Secondary overcurrent protection so I wish to use the primary OC protection only. The NEC code specifies that secondary overcurrent protection is...
