I am currently looking at a job where I have two compressors to install both are 200 amp compressors one has a vfd and one does not. I am a little confused on sizing the wire and breakers for this application. We will have breakers that will feed fused disconnects next to the compressor and the farthest compressor is 50 feet from the switchgear.
first compressor with a VFD
480 volt 284 amp FLA
reccommended cable 500 kcmil
reccommended fuses fast acting 500 amps.
Second compressor non VFD
480 volt 275 amps fla
reccommended cable size 400 mcm
reccommended fuse size 350 amp time delay
first compressor with a VFD
480 volt 284 amp FLA
reccommended cable 500 kcmil
reccommended fuses fast acting 500 amps.
Second compressor non VFD
480 volt 275 amps fla
reccommended cable size 400 mcm
reccommended fuse size 350 amp time delay