Paul Frank

Modern electrical systems have enormous capacities for destruction when short circuits occur. Proper fusing is critical. One cycle of high fault current can vaporize wiring and...

Electrical equipment; especially motors and their controllers; will not operate reliably on unbalanced voltages in a 3-phase system. Generally, the difference between the highest...

Most large power (and many small distribution) transformer installations provide all three phases. Sometimes they do so with three single-phase units, sometimes with one 3-phase...