What Is an Alternating Relay?

An alternating relay is a control device that switches between two loads—such as pumps or compressors—to balance run time, reduce mechanical wear, and improve operational efficiency. ATC’s UL Listed alternating relays meet rigorous safety standards, making them ideal for industrial applications that demand reliable, time-based or demand-based load control. These relays are commonly used in duplex systems to ensure even cycling and system longevity.