Blackburn SWD190A1406 SWD FLEX BRAID SERIES 406MM LONG

It is a flexible braid shunt connector, built to IEEE/ANSI C37.34, the standard covering high voltage air switches. The braid carries current across a moving or expanding joint, such as a switch blade, disconnect hinge, or bus expansion point, where a rigid bar cannot flex. Conductor is tin-plated copper in a flat braid form, 406 mm long, with a 4-hole pad arrangement at the terminations.

Four holes. It is a 4-hole pad braid, so the mating bus or switch terminal needs a matching four-hole drilling pattern. If your existing pad is drilled two-hole, the 4-hole braid will not bolt up without re-drilling, and you would want a 2-hole braid instead.

It is built to IEEE/ANSI C37.34, the test code for high voltage air switches, which is the standard normally called out on switch shunt connections in substation drawings. Match that reference against your drawing note along with the required length and hole pattern.

Not where the joint moves. A rigid bar transmits mechanical stress into the terminal pad and will work-harden or crack at a hinge, a rotating blade, or a bus run that expands and contracts with temperature. The SWD braid is a flexible flat conductor precisely so the connection flexes instead of the hardware. Use rigid bar only on static bus-to-bus connections.

Tin plating on the copper braid slows oxidation at the strand surface and in the bolted connection, which keeps contact resistance stable outdoors and in switchyard conditions. It also makes the braid compatible with aluminum bus without the galvanic problem you get from bare copper on aluminum.

Each. The selling unit is one braid, so for a three-phase switch you order three, and for a job needing a shunt at each hinge and each jaw you count every joint separately. Part number is SWD190A1406.

Country of origin is the United States, which matters on federally funded and utility work carrying domestic sourcing requirements such as Buy America provisions.