PARALLEL FEEDERS Clause Samples

PARALLEL FEEDERS. In a 2x25 kV Autotransformer Feed System (shown above), a bare parallel Feeder (often termed the negative Feeder) will normally be mounted aerially on insulators on the OCS Poles, and will form a continuous electrical connection between Substation facilities. There is a 180 degree phase difference between the voltages of the parallel negative Feeder and the Catenary System, giving a 50 kV phase-to-phase voltage difference between these conductors. In a 1x25 kV Direct Feed System, the Feeder (where used) will be a bare paralleling conductor that can be connected at frequent intervals to the OCS to provide localized electrical reinforcement of the circuit. There is no phase difference between the voltages of the parallel reinforcement Feeder and the Catenary System. In some restricted clearance locations, insulated cables may have to be substituted for the bare conductors in either system.