Patent ID: 7168974
Filing Date: 2007-01-30
Classification: H01R

Abstract:
1. Apparatus adapted to be coupled to an AC multi-phase power line having a first conductor for receiving a first phase, a second conductor for receiving a second phase, a third conductor for receiving a third phase and a fourth conductor for a ground connection comprising: a first series circuit of a diode interposed between a first resistor and a second resistor; a second series circuit of a diode interposed between a first resistor and a second resistor; a third circuit of a diode interposed between a first resistor and a second resistor; said first, second and third series circuits coupled in parallel with each other between a first end terminal coupled to the first resistor of each series circuit and a second end terminal coupled to the second resistor of each series circuit; indicator means coupled between said first and second end terminals; a first diode having a first terminal coupled to said first end terminal and a second terminal adapted to be coupled to said fourth conductor; said first conductor for receiving said first phase is coupled between said diode and said second resistor of said first series circuit; said second conductor for receiving said second phase is coupled between said diode and said second resistor of said second series circuit; and said third conductor for receiving said third phase is coupled between said diode and said second resistor of said third series circuit.