The present invention relates generally to voltage level indicators for use with connectors employed in alternating current high voltage circuits, and more particularly, to a voltage-indicating test point cap for mounting on the test point terminal of an elbow connector or the like to provide a visual indication of the voltage level present in such connectors.
Often cables used to carry alternating current at high voltage levels in power generating and distribution systems are connected to transformers and other system components by means of plug-in connectors which snap onto a complementary terminal on the component. Connectors of this type often provide one or more test points for capacitively coupling test devices such as fault indicators to the conductor of the connector. One such fault indicator is disclosed in my U.S. Letters Pat. No. 3,906,477, issued Sept. 16, 1975.
Various types of indicator circuits have heretofore been provided for determining whether the conductor of a connector is energized by a high voltage current. Examples of such indicator circuits may be seen in U.S. Letters Pat. Nos. 3,524,178 and 3,328,690. While such indicator circuits provided means for determining whether the conductor is energized, they did not provide an indication of the voltage level on the conductor. Although apparatus for determining voltage level on a conductor is known, such as that disclosed in U.S. Letters Pat. No. 3,660,757, such apparatus has been unsatisfactory for use in conjunction with connector test points.