Siemens OLR1003 (G) Overload Relay, also listed as Siemens Allis OLR1003 (G) Overload Relay, is a motor-protection device rated for 70–100 A. Designed to accompany Siemens contactors in industrial control panels, this relay provides overload protection by monitoring current in motor circuits and tripping to prevent damage from overcurrent. The model's 70–100 A range makes it suitable for mid-sized motors and compatible starter assemblies within the Siemens/Allis-Chalmers lineage.
