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Specification & Description
The Siemens 3RU Series Overload Relay is a robust and reliable component designed for motor protection. With a current range of 57 to 75 A, it is suitable for a variety of industrial applications. This overload relay ensures efficient operation with its size S3 footprint, making it a compact solution for integrating into motor control systems. The device features a manual and automatic reset function, providing flexibility in system control.
Constructed to withstand voltages up to 1000 V, the relay is equipped with both 1NC and 1NO contacts, offering versatility in circuit design. The screw-type terminals ensure a secure and durable connection for both the main and auxiliary circuits. With dimensions of 120 x 70 x 140 mm, it maintains a minimal space requirement while delivering reliable performance.
The Siemens 3RU Series Overload Relay is engineered to provide trip class 10 protection, safeguarding motors from overload conditions. It is designed for direct mounting, allowing for a straightforward installation process. The relay's operational reliability is further enhanced by its ability to function effectively in a wide range of ambient temperatures, from -20 to +70°C, making it suitable for challenging environments.
This overload relay is an essential component for industrial professionals seeking a dependable solution for motor protection that combines functionality with ease of use.
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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 by interrupting the electrical supply when an overload condition is detected, ensuring the motor operates within its rated current range.
Can this overload relay be used in hazardous locations?
Yes, the overload relay has general product approval for use in hazardous locations, making it suitable for a variety of industrial environments.
What are the mounting options for this relay?
The relay can be directly mounted to a contactor and is designed to be rotatable and tiltable to accommodate various installation requirements.
What is the trip class of this overload relay?
This overload relay has a trip class of 10, which means it will trip within 10 seconds at 600% of its rated current, providing quick protection against overloads.
What type of terminals does this overload relay have?
It is equipped with screw-type terminals for both the main current circuit and the auxiliary and control current circuit, facilitating secure and reliable connections.
What is the required spacing for side-by-side mounting of this relay?
No additional spacing is required for side-by-side mounting of the relay, but a 6 mm clearance is recommended for live parts at the side.
What is the insulation voltage rating of this overload relay?
The overload relay has an insulation voltage rating of 1000 V, with a degree of pollution 3, ensuring it can withstand the electrical demands of industrial applications.
What are the dimensions of this overload relay?
The dimensions of the overload relay are 120 mm in height, 70 mm in width, and 140 mm in depth, making it compact enough for integration into various control systems.
What is the ambient temperature range for operating this relay?
The relay can operate within an ambient temperature range of -20 to +70 degrees Celsius, ensuring reliable performance in a wide range of environmental conditions.
How can I determine if this overload relay is compatible with my existing contactor?
The overload relay is designed to be compatible with size S3 contactors. You should verify the size and specifications of your contactor to ensure compatibility.
