Patent ID: 7218089
Filing Date: 2007-05-15
Classification: H02J,H02M,Y02B,Y04S

Abstract:
1. A method for converting to same phase power supply from three phase power system comprising: (a) Receiving a fault or overload trip signal from main power lines; (b) Operating an interlock of three phase circuit breakers to switch off main power lines and switch on same phase power line with a three phase to same phase conversion switch; (c) Categorizing power consumption subscribers by emergency and non-emergency groups in a way to minimize the power shut down impact on the subscribers and differentiate the charge rates between the emergency and non-emergency subscribers; (d) Selecting one of three phase power line as power source of the same phase power supply by means of a selection switch; and (e) Feeding power to load systems of three-phase four-wire with neutral line grounded and single-phase two-wire with one line grounded, wherein the grounded lines are connected to neutral line of the main power.