1. The 3UG4511-1AQ20 is a Siemens monitoring relay from the Sentron product line, designed to monitor various electrical functions such as phase loss, phase sequence and overload.
2. It is a single-phase mini monitoring relay with a robust, plastic housing and a dimension of 49 x 71 x 57 mm.
3. It has LED indicator lights to indicate various conditions including relay status, phase sequence, overload, underload and phase failure. It is protected against dust, water and UV radiation and rated for IP20 protection.