DESIGN AND CONSTRUCTION OF A SELF-OPERATED SAFETY SWITCH
Abstract
The design and construction of an automatic change-over from public utility supply to private and vice-versa was aimed at providing a useful system for use in homes, offices, or industries. The system was achieved with a veroboard,1000µf (microfarads), 2-capacitor, 5-diodes, 3 relays, jump wire, transformer, bulb, lamp holder. The system turns on a generator when the public utility (PHCN) is off by cranking when the generator is fully started. A delay was provided to stop the generator microseconds after the PHCN is restored to avoid unnecessary off and on. A display that shows when PHCN or GEN. is son was provided.
Keywords
GEN, CHANGE-OVER, switching-unit, NEPA, PHCN