Distribution feeder circuits are the connections
between the output terminals of a distribution substation and the input
terminals of primary circuits. The distribution feeder circuit conductors
leave the substation from a circuit breaker or circuit recloser via
underground cables, called substation exit cables. The underground cables
connect to a nearby overhead primary circuit outside the substation. This
eliminates multiple circuits on the poles adjacent to the substations
thereby improving the overall appearance of the substation.
Several distribution feeder circuits can leave a substation extending in
different directions to serve customers. The underground cables are
connected to the primary circuit via a nearby riser pole.
The distribution feeder bay routes power from the substation to the
distribution primary feeder circuits.
In the photo of the distribution main feeder the primary circuit is fed
underground to a nearby distribution system overhead line. The yellow cables
are the primary feeder lines going underground.
Figure 1. 3-phase distribution feeder bay
Figure 2. Distribution main feeder
Figure 3. Distribution feeder recloser