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Specification & Description
The Siemens 3RU2126-4BC0 is a thermal overload relay designed to provide efficient motor protection. This component is part of the SIRIUS product family, renowned for its reliability and versatility in industrial applications. With a size S0 footprint, it is engineered to seamlessly integrate with contactors of the same size, ensuring a compact and efficient assembly.
This overload relay is adjustable for currents ranging from 14 to 20 A, making it suitable for a variety of motor sizes and applications. It features a class 10 tripping characteristic, which means it will trip in 10 seconds or less if the current exceeds 600% of its rated value, providing quick response to prevent motor damage due to overload conditions.
The main and auxiliary circuits of the 3RU2126-4BC0 utilise spring-type terminals, which facilitate a secure and maintenance-free electrical connection, enhancing the reliability of the installation. The manual-automatic-reset function allows for easy restoration of operation after a trip event.
Constructed to withstand challenging industrial environments, the relay operates effectively within a temperature range of -40 to +70°C and at altitudes up to 2000 metres above sea level. It also boasts an insulation voltage rating of 690V and a surge voltage resistance of 6kV, ensuring robust performance in electrical demanding situations.
The 3RU2126-4BC0 is designed with safety in mind, featuring finger-safe terminals and a protection class of IP20, which guards against the ingress of solid objects and enhances the safety of personnel during installation and maintenance.
This overload relay is a testament to Siemens' commitment to quality and innovation, providing a dependable solution for motor protection in a wide range of industrial applications.
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Frequently Asked Questions
What is the size of the overload relay?
The overload relay is of size S0, which is suitable for compact installations and can be combined with S0 size contactors.
Can this overload relay be used in hazardous locations?
Yes, the overload relay has general product approval for use in hazardous locations, ensuring it can operate safely in such environments.
What type of terminals does this overload relay have for the main and auxiliary circuits?
The overload relay features spring-type terminals for both the main and auxiliary circuits, facilitating secure and maintenance-free connections.
What is the operating temperature range for this overload relay?
The operating temperature range for the overload relay is from -40°C to +70°C, making it suitable for a wide range of environmental conditions.
What is the tripping class of this overload relay?
This overload relay has a tripping class of 10, which means it provides a quick response to overloads, typically within 2 to 10 seconds at 600% of the rated current.
What is the adjustable pick-up value current range for the current-dependent overload release?
The adjustable pick-up value current range for the current-dependent overload release is from 14 A to 20 A.
What is the insulation voltage rating for this overload relay?
The insulation voltage rating for the overload relay is 690 V with a degree of pollution 3, ensuring adequate insulation for safety and performance.
Is there a manual reset function available on this overload relay?
Yes, the overload relay comes with a manual-automatic-reset feature, allowing for manual intervention when needed.
What is the surge voltage resistance of this overload relay?
The surge voltage resistance of the overload relay is rated at 6 kV, providing robust protection against voltage spikes.
How many poles does the main current circuit of this overload relay have?
The main current circuit of the overload relay has 3 poles, which is typical for three-phase applications.
