The Siemens 3UG5522-1AW30 is an analog current monitoring relay from the SIRIUS family, designed to detect overcurrent and undercurrent conditions in AC or DC circuits. It monitors current from 0.05 to 10 A AC/DC and operates on a universal supply voltage of 24 to 240 V AC/DC at 50/60 Hz. The adjustable trip delay (0.5 to 30 s) lets you filter out transient spikes, so nuisance trips don't pull a line down. Output is a single changeover relay contact (1 CO) with screw terminals for wiring.
The 0.05–10 A AC/DC sensing range covers small motor loads, heater banks, and pump currents. The 24–240 V AC/DC supply is a wide-range universal input. Trip delay of 0.5–30 s is set via a front-panel potentiometer.