Description
The Siemens 3RU21464LB1 is a high-performance SIRIUS thermal overload relay, engineered to provide robust and reliable protection for electric motors up to 75 kW. This advanced relay features a 1 normally closed (NC) and 1 normally open (NO) contact configuration, a significant 90A Full Load Current (FLC) rating, and a 3A contact rating, ensuring precise detection of motor overloads and phase failures. Its design prioritizes safety, operational efficiency, and the longevity of motor-driven equipment.
This Siemens thermal overload relay is a critical component in motor control circuits, designed to trip and disconnect the motor from the power supply when excessive current is drawn, preventing damage due to overheating. The Siemens 3RU21464LB1 offers a wide setting range for current adjustment, allowing for precise calibration to match the specific requirements of different motor sizes and applications. Its robust construction ensures dependable operation in demanding industrial environments.
Key applications for the Siemens 3RU21464LB1 include its use in conjunction with Siemens contactors to form complete motor starter units for pumps, fans, conveyors, and other industrial machinery. It is essential for ensuring the operational integrity and safety of motors in manufacturing plants, processing facilities, and commercial buildings. The Siemens 3RU21464LB1 is a cornerstone of effective motor protection.
Invest in the Siemens 3RU21464LB1 for a superior thermal overload relay solution that offers advanced protection and reliability. Its comprehensive features and Siemens’ commitment to quality make it an indispensable component for safeguarding your valuable motor assets and ensuring uninterrupted industrial operations.







