MOTOR RUN VS. MOTOR START

From: vrs <vrs_at_msn.com>
Date: Thu Dec 4 15:14:01 2003

> > We used to have to put "motor run" capacitors on all our
> > large equipment (3 phase) to get our power factor closer
> > to one (unity). However, this system is a single phase
> > system. I don't think the same issue is being addressed
> > by the run capacitor.
>
> It is, like the capacitor in flourescent light fittings the
> run capacitor on a motor is (usually) just for power factor
> correction and it matters not if it's 3 phase or single. The
> give away is if it's across the supply or in series with a
> separate winding. If it's across the supply then it's for PFC.


The drawing does look as though it is in series with a second winding.

    Vince
Received on Thu Dec 04 2003 - 15:14:01 GMT