Siemens 3RT2646-1AF03 Capacitor Contactor, 100 kVAr, 400V, 3-Pole, 110V AC, S3 Screw Terminal Original Brand New

Overview

The Siemens 3RT2646-1AF03 is a specialized capacitor contactor designed for switching capacitive loads up to 100 kVAr at 400V. This 3-pole contactor is a crucial component in reactive current compensation systems and for switching converters. It is built on the robust 3RT2 platform, featuring integrated precharging resistors that engage via leading auxiliary contacts. This design effectively limits the peak charging current of capacitive loads, minimizing disturbances to the power supply network and ensuring reliable operation. The contactor is equipped with a 110V AC, 50 Hz control coil and includes 1 NO + 1 NC auxiliary contacts for versatile control circuit integration. Its S3 size and screw terminals make installation secure and straightforward.

Key Benefit

• Optimized Performance: Specially designed with integrated precharging resistors to limit inrush currents, protecting both the contactor and the power network.
• High Reliability: Based on the proven 3RT2 series, ensuring long-term durability and dependable performance in demanding applications.
• Enhanced Safety: Reduces stress on electrical components by managing capacitive loads effectively, which in turn enhances the safety and longevity of the entire system.
• Versatile Integration: The 1 NO + 1 NC auxiliary contacts allow for easy integration into complex control and monitoring systems.
• Easy Installation: Features S3 size and secure screw terminals for a quick and reliable connection.

Functions and Features

• Precharging Resistors: Leading auxiliary contacts switch on precharging resistors before the main contacts close. This function is key to limiting the peak charging current of capacitive loads.
• Load Management: The 3RT26 contactor is perfectly suited for switching choked or unchoked capacitors in reactive current compensation systems, as well as switching converters.
• Expandability: The 3RT264 model can be expanded with lateral auxiliary switches to meet specific control circuit requirements.
• Short-Circuit and Overload Protection: The device connections require appropriate protection (see technical data sheet and configuration manuals for details).
• Overvoltage Protection: The contactor can be retrofitted with surge suppressors (RC elements, varistors, etc.) for damping opening surges in the coil (ordered separately).

Important Note on Protection

For optimal performance and safety, all connections (main, auxiliary, and control supply) must be protected against short circuits and overloads. Refer to the technical product data sheet and relevant configuration manuals for detailed guidance on selecting and dimensioning suitable protection devices.

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