The Siemens 3RU1136-1KB0 is a thermal overload relay designed to provide efficient protection for motors in the event of overload or phase failure. This relay is part of the SIRIUS product family, renowned for its reliability and versatility in various industrial applications. With a trip class of 10, it ensures quick response to prevent motor damage due to excessive current draw.
This overload relay is suitable for direct mounting onto contactors and features a three-pole design for the main current circuit. It has an adjustable response current range of 9 to 12.5 A, allowing for precise calibration according to the motor's requirements. The relay operates within an insulation voltage rated at 690 V and has an impulse voltage resistance of 6 kV, ensuring it can withstand transient spikes and surges.
The 3RU1136-1KB0 is designed with user safety in mind, boasting a finger-safe protection class of IP20. It can be installed in environments with an altitude of up to 2000 meters above sea level and can operate within a temperature range of -20 to +70 degrees Celsius, making it suitable for a wide range of operating conditions.
For auxiliary circuits, the relay includes one normally closed (NC) and one normally open (NO) contact, providing flexibility for control circuit integration. The contacts are reliable for PLC control applications, with operational currents rated for various AC and DC voltages.
The compact dimensions of the relay, with a height of 105 mm, a width of 55 mm, and a depth of 118 mm, make it an ideal choice for installations where space is at a premium. The screw-type terminals for both the main and auxiliary circuits facilitate straightforward and secure wiring connections.
Overall, the Siemens 3RU1136-1KB0 thermal overload relay is a robust and dependable choice for motor protection in industrial settings, ensuring machinery operates safely and efficiently while safeguarding against potential overload damage.