An improved method to install high voltage cables into ducts using water flow is described. Instead of using a single pig, a number of （dividable） MultiPigs are mounted around the cable, exerting a distributed force...An improved method to install high voltage cables into ducts using water flow is described. Instead of using a single pig, a number of （dividable） MultiPigs are mounted around the cable, exerting a distributed force resulting from the equally shared pressure differences over each pig. Because the capstan effect is reduced, the installation lengths are increased considerably, while pulling forces on the cable remain small. The MultiPigs can also be used for FreeFloating, flowing cable lengths to any desired location, loose from the cable insertion equipment. This is especially of use in difficulty to reach （for cable drums and other equipment） places, e.g. tunnels.展开更多
文摘An improved method to install high voltage cables into ducts using water flow is described. Instead of using a single pig, a number of （dividable） MultiPigs are mounted around the cable, exerting a distributed force resulting from the equally shared pressure differences over each pig. Because the capstan effect is reduced, the installation lengths are increased considerably, while pulling forces on the cable remain small. The MultiPigs can also be used for FreeFloating, flowing cable lengths to any desired location, loose from the cable insertion equipment. This is especially of use in difficulty to reach （for cable drums and other equipment） places, e.g. tunnels.
