Siemens 3RT2646-1NF35 SIRIUS Capacitor Contactor 100 kVAr, 400V, AC-6b, Size S3 Original Brand New

Overview

The Siemens 3RT2646-1NF35 is a high-performance SIRIUS capacitor contactor specifically designed for switching capacitive loads in reactive current compensation systems. Part of the robust SIRIUS 3RT2 series, this contactor is engineered to handle demanding AC-6b applications up to 100 kVAr at 400 V. Its unique design incorporates precharging resistors that limit the inrush current, protecting the power supply network and extending the lifespan of the equipment. Featuring a compact Size S3 footprint, it is a reliable and efficient solution for modern industrial environments.

Key Features & Benefit

• Optimized for Capacitive Loads (AC-6b): Designed with leading auxiliary contacts and integrated precharging resistors to effectively manage the high inrush currents associated with switching capacitors, minimizing stress on the electrical system.
• High Power Rating: Capable of switching up to 100 kVAr at 400 V, making it suitable for a wide range of reactive power compensation applications.
• Flexible Control Voltage: The control circuit operates on a wide range of AC/DC voltages from 83-155 V, 50/60 Hz, offering versatility and easy integration into various control systems.
• Integrated Varistor: Comes with an integrated varistor for overvoltage protection, safeguarding the coil and enhancing the device’s durability.
• Reliable Auxiliary Contacts: Equipped with two normally closed (2 NC) auxiliary contacts for feedback and control functions, providing a secure and configurable interface for your system.
• Secure Screw Terminals: Features robust screw terminals for a strong and reliable electrical connection, simplifying installation and maintenance.
• Compact & Efficient: The Size S3 design offers a powerful solution in a space-saving form factor.
• Standards Compliant: Adheres to critical international standards including IEC 60947-1, IEC 60947-4-1, IEC 60831-1, and others, ensuring safety and compatibility.

Function

• Capacitor Switching: The primary function is to switch choked or unchoked capacitors in reactive current compensation systems. The precharging resistors and leading auxiliary contacts effectively limit peak charging currents.
• Converter Switching: Can also be used for switching converters, highlighting its versatility in power electronics applications.
• Current Inrush Limitation: The integrated precharging resistors serve to limit the harmful peak charging current of capacitive loads, preventing voltage dips and other negative impacts on the power supply network.
• Overvoltage Protection: The built-in varistor protects the contactor’s coil from overvoltage spikes, increasing its operational reliability and lifespan.

Technical Specification

• Product Number: 3RT2646-1NF35
• Application: Capacitor Contactor
• Rated Power (AC-6b): 100 kVAr at 400 V
• Number of Poles: 3-pole
• Control Voltage: 83-155 V AC/DC, 50/60 Hz
• Integrated Features: Varistor
• Auxiliary Contacts: 2 NC
• Terminal Type: Screw Terminal
• Size: S3
• Standards: IEC 60947‑1, IEC 60947‑4‑1, IEC 60947‑5‑1, IEC 60831‑1, IEC 61921
• Compatibility: Part of the Siemens SIRIUS 3RT2 product family.

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