Protective switch with status detection

摘要

A protective switch assembly (100) includes switch position sensors (109) that sense switch blade (14) position and indicate whether one or more switches (104) are open. According to another aspect, the voltage and current of the switch circuits are monitored to determine switch position as well as overall circuit status.

主权项

1. A switch assembly for selectively opening and closing the electrical connection between a protective relay and a potential or current sensor, comprising:
a plurality of individual switches including blades movable between an open and a closed position, said switches being electrically connected between the protective relay and the potential or current sensor; a switch position sensor in each of said plurality of individual switches capable of sensing when the blade is in proximity to the sensor and positioned to be sufficiently close to the blade when the switch is in the closed position to sense the blade; and an indicator that optically displays whether any one of said blades is in the open position based on signals from said switch position sensors.