Patent ID: 6031335
Filing Date: 2000-02-29
Classification: C07D,G05F,H05B

Abstract:
A method of controlling an electrical power system for providing one of a plurality of selected voltages to a load, the method comprising the steps of:(a) electrically connecting one end of a winding to the positive terminal of a source of electrical power, the winding being tapped at a predetermined position for supplying an output terminal with a selected voltage;(b) enabling a terminal connection device to electrically connect the other end of said winding to a neutral terminal of said source of electrical power in response to supply of power being required;(c) excluding a predetermined number of turns of said winding in response to a request for another selected voltage;(d) monitoring for at least one type of fault condition; and(e) electrically disconnecting the winding from the neutral terminal and electrically short-circuiting said other end of the winding to said predetermined position when a fault condition is detected.