Patent ID: 9130364
Filing Date: 2015-09-08
Classification: G01R,H02H

Abstract:
1. A hot circuit indicator device comprising: a high voltage wire energized up to approximately 38 KV phase to phase of a three phase high voltage network connected to the hot circuit indicator device; a phase voltage detector to monitor a presence of each one of the three phases and detect a loss of one or more of the three phases; a phase rotation detector to monitor and detect a sequence of the three phases of the three phase high voltage network and output a phase rotation signal; a phase voltage indicator corresponding to each one of the three phases to show the present and loss of each phase; a phase rotation indicator to show one of a clockwise and a counterclockwise sequence of the three phases; a microprocessor for receiving the phase rotation signal and illuminating the phase present indicators and the phase rotation indicator based on the received phase rotation signal corresponding to the detected phase voltage and the detected phase sequence; and a relay contact controlled by the microprocessor to automatically disconnect power to a load when a phase loss or phase reversal condition is detected.