The Siemens SIRIUS 3UG4625-1CW30 is a residual current monitoring relay with digital setting, designed specifically for three-phase supplies. It monitors residual current in the range of 30 mA to 40 A, adjustable via the digital interface, and operates on a wide supply voltage of 24 to 240 V AC/DC. This makes it a versatile choice for detecting ground faults or insulation degradation in motor feeders, distribution panels, and industrial loads.
Width is 22.5 mm, so it takes one slot in a terminal-block-style rail. Pollution degree 3 means it's suitable for conductive environments (condensation, occasional dust) typical of control rooms and light industrial floors.
