Line Stop Services Line Stops are used to temporarily shut down a pipeline system to complete modifications or repairs. They allow a system to operate as usual without any interruption of service. Line Stops can be performed on almost any kind of pipe with pressures up to 900 psi @ 100º...
A changeover arrangement for load selector switches of tapped transformers having a plurality of fixed tap contacts which are arranged in a circle and having two switching contacts which can roll on said tap contacts, change over the load output line and, in the quiescent state, both rest on ...