Siemens 3RT2645-1AF05 Capacitor Contactor, S3 Size, 75 kVAr / 400V, 110V AC Coil, 2 NC Aux Contact Original Brand New

Overview

The Siemens 3RT2645-1AF05 is a high-performance capacitor contactor specifically designed for switching capacitive loads (AC-6b) up to 75 kVAr at 400V. As part of the SIRIUS 3RT26 series, this specialized S3 size contactor is engineered to mitigate the negative effects of high inrush currents associated with switching capacitors. It features precharging resistors that are engaged via leading auxiliary contacts, which close momentarily before the main contacts.

This innovative design limits peak charging current, protecting both the contactor and the power supply network from stress and potential damage. With a 110V AC, 50 Hz coil and 2 normally closed (NC) auxiliary contacts, this device is a reliable and robust solution for reactive current compensation systems and converter applications.

Key Features & Benefits

• Capacitive Load Switching (AC-6b): Optimized for switching capacitive loads, limiting inrush currents to protect equipment and the grid.
• Integrated Precharging Resistors: Leading auxiliary contacts bring precharging resistors online, effectively limiting the peak charging current of capacitors.
• High Performance: Rated for 75 kVAr at 400V, making it suitable for demanding industrial applications.
• Reliable Operation: Conforms to international standards including IEC 60947-1, IEC 60947-4-1, and IEC 60831-1, ensuring safety and quality.
• Versatile Application: Ideal for switching choked or unchoked capacitors in reactive current compensation systems and for use with converters.
• Flexible Configuration: Features a screw terminal for secure connections and is expandable with additional lateral auxiliary switches (sold separately).
• Integrated Auxiliary Contacts: Comes with 2 NC auxiliary contacts for versatile control and signaling functions.

Functions

• Capacitor Switching: The primary function is to switch capacitive loads in reactive current compensation systems.
• Inrush Current Limitation: Utilizes leading auxiliary contacts and precharging resistors to limit the peak charging current upon closing.
• Circuit Control: The 110V AC, 50 Hz coil enables control from a standard AC power source.
• Signaling and Interlocking: The integrated 2 NC auxiliary contacts can be used for feedback, status indication, or interlocking with other control circuits.
• Short-Circuit and Overload Protection: Can be combined with suitable protective devices (e.g., fuses, circuit breakers) for comprehensive protection of the main, auxiliary, and control circuits.

For more our products visit turll.com