3RU1146-4MB0

The 3RU1146 thermal overload relays can protect your loads from overload and phase failure. You must implement short-circuit protection by means of a fuse or circuit-breaker. The main and auxiliary circuits can be connected in various ways, including the use of Cage Clamp terminals. When the overload relay has been connected, it can be tested for correct functioning using a TEST slide. In addition to the TEST function, the Siemens 3RU1146 thermal overload relay is equipped with a STOP function. The tripping characteristics show the relationship between the tripping time and the tripping current as a multiple of the operational current Ie and are specified for symmetrical three-pole and two-pole loading from cold. The limits of the limiting tripping current lie, in the case of the 3RU1146 thermal overload relay for symmetrical three-pole loading between 105% and 120% of the operational current.