Test point mounted circuit condition indicator

Details Test point mounted circuit condition indicator Test point mounted circuit condition indicator

G - Physics

01

R

324/58

G01R 5/00 (2006.01) G01R 19/155 (2006.01)

Patent

CA 1124795

Case 790314 TEST POINT MOUNTED CIRCUIT CONDITION INDICATOR Edmund O. Schweitzer Abstract of the Disclosure Indicating devices for mounting on a test point in an alternating current distribution system provide a visual indication of either voltage level or fault occur- rence in the system. The indicating devices are contained in a housing which includes an electrically-conductive rubber outer shell adapted to snap-fit over the test point, and a non-conductive inner housing within which the indicating devices are contained. The indicating devices include a bridge-type rectifier which is coupled to a con- ductor of the system through the test point terminal, and to ground through the electrically-conductive outer shell. In a voltage indicator application, the rectifier circuit charges a capacitor across which a neon lamp visible through a window in the end of the housing is connected the rate at which the neon lamp flashes providing an indication of the voltage level on the conductor. In a fault indicator application, the rectifier charges a capacitor which provides current for tripping an indicator flag to a fault-indicating position following a fault, and to a reset position upon restoration of alternating current in the system.

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