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Specification & Description
The Siemens 3RU1126-1FB0 is a thermal overload relay designed to provide efficient motor protection. This component is essential for safeguarding motors in industrial applications from potential damage due to overloads. With an adjustable response current range of 3.5 to 5 A, it ensures precise protection for motors by tripping in the event of an overload, thus preventing motor burnout and downtime.
Crafted for direct mounting onto contactors, the 3RU1126-1FB0 is part of the SIRIUS product family, renowned for reliability and performance. It features a compact design with dimensions of 96 mm in depth, 97 mm in height, and 45 mm in width, making it suitable for installations where space is at a premium.
The overload relay is equipped with three main poles for the current circuit and offers a finger-safe protection class of IP20, ensuring a high level of safety during operation. It is capable of withstanding impulse voltages up to 6 kV and operates within an ambient temperature range of -20 to +70°C, making it robust for challenging industrial environments.
Additionally, the 3RU1126-1FB0 includes one normally closed (NC) and one normally open (NO) auxiliary contact, providing flexibility for control circuit integrations. It is designed to be used with a size S0 contactor, and it conforms to the CLASS 10 trip class, which specifies a trip time of 2 to 10 seconds under overload conditions of 600% of the set current value.
This overload relay is suitable for a wide range of industrial applications, including manufacturing, processing, and automation systems, where motor protection is critical for operational efficiency and safety.
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Frequently Asked Questions
What is the function of this overload relay?
The overload relay is designed to protect motors from overcurrent situations, ensuring safe operation by tripping the circuit when current exceeds a preset level.
Can this overload relay be mounted directly onto a contactor?
Yes, it is designed for direct mounting onto a contactor, specifically Siemens size S0 contactors.
What is the adjustable response current range for this relay?
The adjustable response current range for the 3RU1126-1FB0 is between 3.5 and 5 amperes.
What trip class does this overload relay belong to?
This overload relay is classified as a Class 10 trip class, which means it will trip within 10 seconds at 600% of the rated current.
What are the dimensions of this overload relay?
The dimensions are 97 mm in height, 45 mm in width, and 96 mm in depth.
What is the maximum operating voltage for the main circuit of this relay?
The maximum operating voltage for the main circuit is rated at 690 volts AC.
What type of terminals does this overload relay have for electrical connections?
It features screw-type terminals for both the main current circuit and the auxiliary and control current circuit.
What is the ambient temperature range in which this relay can operate?
The relay can operate within an ambient temperature range of -20 to +70 degrees Celsius.
Is this overload relay suitable for use in hazardous locations?
Yes, it has certifications for use in hazardous locations, ensuring compliance with relevant safety standards.
What is the insulation voltage of this relay?
The insulation voltage, with a degree of pollution 3, is rated at 690 volts.
