Siemens 3RT2628-1AV05 Capacitor Contactor 33 kVAr, 400V, Size S0, 1 NO + 2 NC Aux Contact Original Brand New

Overview

The Siemens 3RT2628-1AV05 is a high-performance capacitor contactor from the trusted SIRIUS 3RT2 series, specifically engineered for switching capacitive loads in reactive power compensation systems. Designed to meet the stringent demands of AC-6b applications, this contactor is rated for 33 kVAr at 400V. Its integrated precharging resistors, activated by leading auxiliary contacts, effectively limit peak charging currents, minimizing stress on the power supply network and ensuring reliable, long-term operation. With its compact Size S0 design, screw terminals for secure wiring, and a versatile 1 NO + 2 NC auxiliary contact configuration, the 3RT2628-1AV05 provides a robust and efficient solution for a wide range of industrial and commercial applications.

Key Benefits & Feature

• Optimized for Capacitive Loads: Specifically designed for AC-6b applications, this contactor expertly manages the unique challenges of switching capacitors, ensuring smooth and reliable operation in reactive power compensation systems.
• Current Limiting Technology: The built-in precharging resistors, controlled by leading auxiliary contacts, significantly reduce inrush currents during switching. This protects the capacitor bank, prolongs the life of the equipment, and maintains the stability of the power grid.
• High Performance and Durability: Rated for up to 33 kVAr at 400V, the 3RT2628-1AV05 is built with high-quality components and adheres to rigorous international standards (IEC 60947-1, IEC 60947-4-1, etc.), guaranteeing exceptional performance and a long service life.
• Versatile Auxiliary Contacts: The integrated 1 NO + 2 NC auxiliary contacts provide flexible control and signaling options, allowing for easy integration into complex control circuits and monitoring systems.
• User-Friendly Design: Featuring secure screw terminals for main and auxiliary circuits, this contactor simplifies installation and maintenance, ensuring a reliable and professional connection. Its compact Size S0 form factor saves valuable space in control panels.
• Comprehensive Protection: This device can be easily integrated with suitable protection measures against short circuits and overloads, enhancing the safety and reliability of your electrical system.

Function

The Siemens 3RT2628-1AV05 capacitor contactor performs the critical function of switching capacitive loads (AC-6b) in power factor correction systems. It operates by first engaging leading auxiliary contacts that connect precharging resistors in series with the capacitors. This initial step limits the high inrush current, or peak charging current, that typically occurs when switching a capacitor. After a brief delay, the main contacts close, bypassing the resistors and connecting the capacitors directly to the power supply. This process effectively minimizes network disturbances and protects both the contactor and the capacitor bank from electrical stress. The 400V AC, 50 Hz coil and 1 NO + 2 NC auxiliary contacts enable seamless integration into automated control systems.

Technical Specification

• Product Type: Capacitor Contactor
• Product Number: 3RT2628-1AV05
• Rated Power (AC-6b): 33 kVAr at 400 V
• Poles: 3-pole
• Control Supply Voltage: 400 V AC, 50 Hz
• Auxiliary Contacts: 1 NO (Normally Open) + 2 NC (Normally Closed)
• Terminal Type: Screw terminals
• Size: S0
• Standards: IEC 60947-1, IEC 60947-4-1, IEC 60947-5-1, IEC 60831-1, IEC 61921
• Mounting: Can be retrofitted with surge suppressors, lateral auxiliary switches, and other accessories (sold separately).

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