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Specification & Description
The Siemens 3RU2126-4EB1 is a high-quality thermal overload relay designed to provide efficient motor protection. This component is part of the SIRIUS product range and is engineered to safeguard motors in the event of overload or phase failure. With a size S0 footprint, it is suitable for standalone installation and can be easily integrated into existing systems.
The relay offers an adjustable current setting range of 27 to 32 A, ensuring precise protection for a variety of motor sizes. It features a class 10 tripping characteristic, which means it will trip within 10 seconds at 7.2 times the set current, providing quick response to prevent motor damage.
Constructed with robust materials, the 3RU2126-4EB1 is designed to withstand challenging industrial environments. It can operate effectively within a wide temperature range from -40 to +70 °C, making it suitable for use in a diverse array of operating conditions. Additionally, the relay is equipped with both screw-type main and auxiliary circuits for secure and reliable connections.
The 3RU2126-4EB1 also includes a manual-automatic-reset function, allowing for both manual intervention and automatic reset, which is essential for applications requiring frequent start-stop operations. This feature enhances the flexibility and control for the user, ensuring that the relay can be tailored to specific application needs.
With its combination of adjustable protection settings, durable construction, and versatile functionality, the Siemens 3RU2126-4EB1 thermal overload relay is an essential component for industrial motor control applications, providing reliable protection to extend the lifespan of motors and reduce downtime.
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Frequently Asked Questions
What is the function of an overload relay?
An overload relay is designed to protect an electric motor from overheating by detecting an overload condition and interrupting the current flow to the motor, thus preventing potential damage.
How can I install this overload relay?
The overload relay can be installed as a stand-alone device with screw connections for the main and auxiliary circuits. It should be installed by a qualified electrician following the appropriate electrical standards and regulations.
What are the tripping characteristics of this relay?
The tripping characteristics of the 3RU2126-4EB1 are designed to provide thermal overload protection for motors, with a class 10 trip class, meaning it will trip within 10 seconds under certain conditions of overload.
Can this overload relay be used in hazardous locations?
Yes, this overload relay has approvals for use in hazardous locations, making it suitable for a variety of industrial environments where such conditions may exist.
What is the temperature range for operating this relay?
The operating temperature range for this relay is between -40°C and +70°C, ensuring reliable performance in a wide range of environmental conditions.
What is the significance of the insulation voltage rating?
The insulation voltage rating indicates the maximum voltage the relay can withstand without risk of electrical breakdown. For this relay, the insulation voltage with degree of pollution 3 is rated at 690V.
What size of conductor can be connected to the main contacts?
The relay can accommodate single or multi-stranded conductors from 1 to 10 mm², and finely stranded conductors with core end processing from 1 to 10 mm² for the main contacts.
Is there a manual reset function on this relay?
Yes, the 3RU2126-4EB1 features a manual reset function, allowing for the relay to be manually reset after a trip event.
What is the rated operating voltage for this relay?
The rated operating voltage for this relay is 690V, which is the maximum voltage at which the relay can operate effectively.
How can I determine if the relay has tripped due to an overload?
The relay includes an integrated auxiliary switch with a normally open contact that can be used to provide a signal or indication that the relay has tripped due to an overload condition.
