Using this function, the TAPCON® voltage regulator records the topology of the switchgear with its disconnectors and circuit breakers. It also detects transformers connected in parallel in the process, without using additional equipment. This puts the TAPCON® in a position to take over configuring the switchgear and adjusting the control response for the present switching state. As part of the topology function, one of the TAPCONs involved takes over controlling the operation of the remaining TAPCON voltage regulators in parallel in addition to regulating the associated transformer. The parallel operating methods, tap synchronization and circulating reactive current minimization, are optionally available for the topology function.