Siemens 3RT2627-1AV05 SIRIUS Capacitor Contactor 25 kVAr, AC-6b, 400V, 3-Pole, Size S0 Original Brand New

Overview

The Siemens 3RT2627-1AV05 is a specialized SIRIUS capacitor contactor designed for the reliable and safe switching of capacitive loads in power factor correction systems. Built to the highest industry standards (IEC 60947 series), this 3-pole contactor is rated for 25 kVAr at 400 V AC.  Its key feature is the integrated precharging resistors, which are switched on via leading auxiliary contacts.

This innovative design effectively limits the high peak charging currents associated with capacitive loads, minimizing stress on the electrical network and extending the lifespan of the equipment.

Ideal for both choked and unchoked capacitors in reactive current compensation systems, as well as for switching converters, the 3RT2627-1AV05 ensures a stable and efficient power supply. The compact Size S0 unit comes equipped with a 400 V AC, 50 Hz control supply voltage and features a convenient screw terminal connection for secure wiring.

It includes 1 normally open (NO) and 2 normally closed (NC) auxiliary contacts, providing flexibility for control circuit integration.

Key Benefits

• Optimized for Capacitive Loads: Specifically engineered to handle AC-6b loads, the integrated precharging resistors mitigate inrush currents, protecting the power grid and connected equipment.
• Enhanced Reliability: By minimizing electrical stress, the contactor improves the overall reliability and service life of the capacitors and the contactor itself.
• Compliance with Global Standards: Adheres to rigorous international standards (IEC 60947, IEC 60831, IEC 61921), ensuring safety and quality for global applications.
• Versatile Application: Suitable for use in reactive current compensation systems, both with choked and unchoked capacitors, as well as in converter applications.
• Flexible Control Integration: Features 1 NO and 2 NC auxiliary contacts for easy integration into complex control and monitoring circuits.
• Robust and Secure Connections: Utilizes screw terminals for a reliable and secure electrical connection, a preferred method for industrial environments.

Functions

• Capacitor Switching: Safely and reliably switches capacitive loads (AC-6b) up to 25 kVAr at 400 V.
• Inrush Current Limitation: Utilizes leading auxiliary contacts and precharging resistors to limit the peak charging current, preventing disturbances to the power network.
• Auxiliary Contact Operation: The integrated 1 NO + 2 NC auxiliary contacts provide signaling and control functionalities for the capacitor switching process.
• Coil Control: The 400 V AC, 50 Hz coil ensures the main contacts are controlled effectively in accordance with the control circuit’s requirements.
• Protection: Designed to be easily integrated with external short-circuit and overload protection devices for both main and auxiliary connections, as per standard safety practices.

Standards

• IEC 60947-1: General Rules
• IEC 60947-4-1: Contactors and Motor-Starters
• IEC 60947-5-1: Control Circuit Devices and Switching Elements
• IEC 60831-1: Shunt Power Capacitors of the Self-Healing Type for A.C. Systems Having a Rated Voltage up to and Including 1000V
• IEC 61921: Power Capacitors – A Guide for the selection, installation and operation of equipment

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