When using step regulators in series on a distribution circuit, which regulator should have the longer time delay?

When configuring step regulators in series on a distribution circuit, the regulator that is farthest from the source should have the longer time delay. This is important because the farthest regulator will typically experience the most fluctuations and variations in load due to the cumulative effects of all the equipment and load between it and the source.

By allowing a longer time delay for the farthest regulator, it can better accommodate these fluctuations before making adjustments. This approach minimizes unnecessary switching actions caused by transient changes in load, which could lead to more stable voltage regulation across the entire circuit.

In contrast, a regulator that is nearest to the source does not need as long of a delay because it responds to a smaller segment of the circuit and can effectively stabilize voltages in real time without the influence of the loads further down the line. The middle regulator, while significant, typically balances the influences of both the source and the farthest points, making a standard time delay more suitable. Having all regulators set to the same time delay would not account for the varying distances from the source and the resultant load characteristics, which can lead to inefficiencies and potential instability in the overall system.