Patent ID: 9077161
Filing Date: 2015-07-07
Classification: H01H,H02B

Abstract:
1. A system including a high voltage electric power switch and a current transformer supported by the switch designed for an operating voltage, comprising: a high voltage insulator having first, second and third elongated insulator sections, each insulator section having a first end and a second end, the insulator sections being aligned integrally in an end-to-end configuration; the first insulator section having a first high voltage line tap at its first end and a first current transformer (CT) flange at its second end, the second insulator section having a second CT flange at its first end and a second high voltage line tap at its second end, and the third insulator section having the second high voltage line tap at its second end and an electrical ground connection at its second end; the insulator sections each having a length defining an atmospheric insulating distance sufficient to insulate the operating voltage from electric ground through ambient atmosphere; a sealed container extending inside the high voltage insulator filled with a dielectric gas; an electric switch contact located within the sealed container comprising a stationary contact, a moving contact, and a drive rod connected to the moving contact and extending past the electrical ground connection of the third insulator, wherein the drive rod is configured for connection to a switch actuator located beyond the ground connection of the third insulator; the switch configured to conduct an electric power line current between the first and second line taps when the stationary contact is in electrical contact with the moving contact to complete an electric power circuit through the switch; a CT located outside the high voltage insulator at the junction between the first and second CT flanges and positioned to inductively monitor the line current flowing between the switch, the CT having a cover maintained at electrical ground; a conduit maintained at electric ground housing signal wires extending from the CT to a grounded destination point, wherein the conduit is routed through a path in the ambient atmosphere that maintains at least the atmospheric insulating distance between the conduit and the first and second high voltage line taps.