A switching station is a substation without transformers and operating only at a single voltage level. Sometimes they are used for switching the current to back-up lines or for parallelizing circuits. A feeder usually begins with a feeder breaker at the distribution substation. At this point, underground cable transitions to an overhead three-phase main trunk. From there, it is routed to individual building distribution boxes (secondary distribution boxes), which subsequently supply power to unit-level distribution boxes. It is called the switching station in the high-voltage grid. With the comprehensive transformation and development of power transmission, distribution and transformation networks, the number. While primary switchgear operates at the initial stages of power distribution and handles higher voltages, secondary switchgear works further downstream to manage medium-voltage and localized networks.
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