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  1. PLCs, VFDs, Motors and Controls
    Hi guys, I been asked to quote on a 175hp 600v 3ph Atlas air compressor, no name plate as unit hasnt been ordered yet. Been spending the past few years doing mainly resi so im a bit rusty and hopefully can get some confirmation from you guys. (CEC).. from my calc, conductors would be 3/O...
  2. PLCs, VFDs, Motors and Controls
    I have a 3ph 600 volt 5hp motor running a grinder. It takes roughly 5 minutes to stop when the stop button is pressed. I'm looking to wire up dynamic braking to stop the motor much quicker. What's size resisters should I use? Which wattage? After power is removed the voltage drops to 20 vac...
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