Siemens 3RT2645-1AP03 SIRIUS Capacitor Contactor 75 kVAr, S3 Size, 230V AC Coil Original Brand New

Overview

The Siemens 3RT2645-1AP03 SIRIUS capacitor contactor is a specialized 3-pole switching device designed for the demanding requirements of reactive power compensation systems. It is engineered to switch capacitive loads up to 75 kVAr at 400 V (AC-6b), making it ideal for applications involving choked or unchoked capacitors.

A key feature of this contactor is its integrated precharging resistors, which are engaged by leading auxiliary contacts before the main contacts close. This intelligent design effectively limits the peak inrush current, minimizing stress on the power grid and extending the lifespan of the connected components.

This S3 size contactor is equipped with a 230 V AC, 50 Hz control coil and features a screw terminal for secure and reliable wiring. It includes one normally open (1 NO) and one normally closed (1 NC) auxiliary contact, providing flexibility for control and signaling circuits. The robust construction and adherence to international standards like IEC 60947 ensure reliable performance and a long service life in industrial environments.

Key Benefits

• Minimizes Inrush Current: Integrated precharging resistors limit high peak currents, protecting the power grid and improving system stability.
• Enhanced System Longevity: By reducing electrical stress, the contactor helps extend the operational life of capacitors and other connected equipment.
• Reliable Performance: Built to IEC standards, the contactor provides consistent and safe switching of capacitive loads in power factor correction applications.
• Versatile Application: Suitable for switching both choked and unchoked capacitors in reactive current compensation systems and for converter applications.
• Easy Integration: Screw terminals simplify wiring, while the standard size S3 form factor allows for straightforward integration into existing control panels.
• Flexible Control: Includes 1 NO + 1 NC auxiliary contacts for versatile use in control and feedback circuits.

Functions and Features

• Capacitor Switching (AC-6b): Specifically designed for switching capacitive loads, with a rating of 75 kVAr at 400 V.
• Precharging Resistors: Leading auxiliary contacts engage precharging resistors to dampen the inrush current spike during capacitor energization.
• 3-Pole Main Contacts: Provides reliable switching for three-phase systems.
• Control Coil: Operates on 230 V AC, 50 Hz power.
• Auxiliary Contacts: Features one normally open (1 NO) and one normally closed (1 NC) auxiliary contact for signaling and interlocking.
• Screw Terminals: Ensures a secure and low-resistance electrical connection for both main and auxiliary circuits.
• Size S3: A standard frame size for easy mounting and panel integration.
• Robust Standards Compliance: Meets international standards including IEC 60947-1, IEC 60947-4-1, IEC 60947-5-1, IEC 60831-1, and IEC 61921.

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