Quote:
Originally Posted by Al Skierkiewicz
Guys,
The snap action breakers we use will sustain a 600% overload for a second or two and 300% for a while longer. When you are running CIMs the stall(start) current is 131 amps. If you use normal fuses, they will open with high current motors. While the fuses do have a spec that provides for currents in excess of their rated values, they do not survive three times their current ratings for very long and they are not repairable.
|
I agree that the breakers are better all around. If you insist on fuses with large motors, be sure to ramp your voltage up to avoid that high inrush current. Of course, if the motor gets stuck, you will still draw that 131A when you get to full throttle. I would suggest monitoring the current to avoid this condition, but current-monitoring modules cost more than breakers.