Originally Posted by
joeavaerage
Hi,
a 3.8kW spindle drive is likely to suck 40A peak from a single phase supply....does your circuit have that ability?
A 2.2kW VFD is a practical limit for a domestic single phase circuit. Beyond that you need a larger cable installed with appropriate breakers/fuses.
I have just bought a 3 phase (400VAC) 3.5kW spindle, and its peak current is 21A per phase!!!!! 99% of the time it draws about 10A per phase (400VAC), but there is just no
way I could run it on single phase even if I tried.
Craig