D7 Switch Installation

This 25-minute video shows how to install a Chance D7 airbreak switch on a pole. After the pre-assembled assembly is inspected on the ground, it is rigged and lifted into place, then bolted to the pole. Using hand tools, the lineman installs the operating shaft, attaches ground connections, adds the operating lever, and tests the switch to confirm it opens and closes three phase lines simultaneously. See also Chance video “D7 Switch Installation with Reciprocating Operating Handle“ for the installation of this switch, operated by a reciprocation handle.(Courtesy Hubbell)