Siemens 3RT2645-1NB35 Capacitor Contactor AC-6b, 75 kVAr, 400V, 3-Pole, 20-33V AC/DC, Size S3 Original Brand New

Overview

The Siemens 3RT2645-1NB35 is a high-performance capacitor contactor specifically engineered for switching capacitive loads in reactive current compensation systems. Part of the SIRIUS 3RT26 series, this contactor is designed for demanding applications up to 75 kVAr at 400 V, making it an ideal choice for power factor correction and harmonic filtering.

The contactor features integrated precharging resistors, which are engaged by leading auxiliary contacts to effectively limit the inrush current that is characteristic of capacitive loads. This crucial function minimizes stress on the power grid and extends the lifespan of the connected equipment. The 3RT2645-1NB35 is a 3-pole contactor with a versatile 20-33 V AC/DC control voltage and comes with an integrated varistor for surge suppression and 2 normally closed (NC) auxiliary contacts for enhanced control. The robust S3 size and screw terminals ensure a secure and reliable connection in various industrial environments.

Key Benefit

• Optimized for Capacitive Loads: Specifically designed to handle the high inrush currents of capacitors, protecting your equipment and the power supply network.
• Integrated Varistor: Provides built-in overvoltage protection for the control coil, enhancing the device’s durability and reliability.
• Flexible Control: The 20-33 V AC/DC control voltage allows for versatile integration into a wide range of control systems.
• Reliable Connections: Screw terminals provide a secure and robust electrical connection, simplifying installation and maintenance.
• Standards Compliance: Adheres to stringent international standards including IEC 60947 and IEC 61921, ensuring safety and performance.
• Compact and Robust Design: The S3 size offers a balance of power and space efficiency, while the durable construction ensures long-term performance.

Function

• Capacitor Switching (AC-6b): Switches choked or unchoked capacitors in reactive current compensation systems.
• Inrush Current Limitation: Utilizes precharging resistors via leading auxiliary contacts to limit peak charging currents.
• Overvoltage Protection: The integrated varistor protects the control supply voltage connection from damaging voltage surges.
• Auxiliary Switching: The two integrated NC auxiliary contacts provide additional control and feedback capabilities for monitoring and interlocking.

Standards

The Siemens 3RT2645-1NB35 complies with the following international standards:

• IEC 60947-1
• IEC 60947-4-1
• IEC 60947-5-1
• IEC 60831-1
• IEC 61921

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