Overview
The Siemens 3RT2047-1NB30-0CC0 is a high-performance power contactor designed for reliable and efficient switching of electrical loads in industrial applications. As part of the SIRIUS 3RT2 series, this communication-capable contactor combines robust functionality with advanced features, making it a cornerstone for modern automation and control systems. With its compact size S3 design, it provides a powerful solution for applications up to 55 kW at 400 V. The integrated varistor protects against voltage spikes, while the versatile 20-33 V AC/DC control voltage allows for flexible integration into various control circuits.
Key Features & Benefit
- High Power Rating: Rated for AC-3e/AC-3 applications at 110 A and 55 kW at 400 V, it is suitable for a wide range of demanding motor control tasks.
- Versatile Control: The wide 20-33 V AC/DC control voltage range simplifies inventory management and allows for use in both AC and DC control systems.
- Integrated Varistor: An integrated varistor protects the coil from overvoltage, extending the lifespan of the contactor and improving system reliability.
- Communication-Capable: This model is designed for seamless integration with communication modules, enabling remote diagnostics, monitoring, and control, which is essential for Industry 4.0 applications.
- Auxiliary Contacts: Includes 1 Normally Open (NO) and 1 Normally Closed (NC) auxiliary contact, providing feedback and control signals for complex interlocking and control circuits.
- Robust Connection: The reliable screw terminals ensure a secure and long-lasting electrical connection, minimizing maintenance requirements.
- Compact Size: The size S3 form factor offers a high power density, saving valuable space in control cabinets.
Function
The Siemens 3RT2047-1NB30-0CC0 power contactor serves as an electromechanical switch. When the control coil is energized by the 20-33 V AC/DC voltage, the main contacts close, allowing a high-power current to flow to the connected load, such as an electric motor. When the control voltage is removed, the contacts open, interrupting the power. Its primary function is to safely and efficiently switch high-current loads on and off, protecting the electrical system and enabling automated control. The integrated communication capability allows for data exchange with a PLC or other control system, providing real-time status updates and enabling advanced diagnostics.
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