METHOD NO. 1 Using the PHASE-A-MATIC static
converter alone will produce approximately 2/3 normal HP.* This
method is inexpensive, the most popular, provides excellent
results on most machine tools and for numerous other uses.
Motor speed is not changed. Most 2-speed motors, power feeds,
coolant pumps, etc. will operate. Motor will instant reverse. There
is nothing to change. All switch gear will work normally.
*Refers to wye-wound motors; delta-wound motors will
run at 50% rated HP. Delta-wound motors are rarely made in
the United States, but are occasionally found on some
imported equipment, and particularly on German and Italian
machines.