Siemens 3RT2627-1NF35 Capacitor Contactor 25 kVAr, AC/DC 95-130V, Size S0 Original Brand New

Overview

The Siemens 3RT2627-1NF35 is a high-performance capacitor contactor designed for switching capacitive loads in reactive current compensation systems and converter applications. As a specialized version of the SIRIUS 3RT2 series, this 3-pole contactor is engineered to handle AC-6b loads up to 25 kVAr at 400 V. Its unique design features integrated precharging resistors, which are engaged via leading auxiliary contacts. This mechanism effectively limits the inrush current, protecting the power supply network and the components connected to it. With a control voltage range of 95-130 V AC/DC and integrated varistor for surge suppression, this contactor provides reliable and safe operation.

Key Features & Benefit

• Optimized for Capacitive Loads: Specifically designed for AC-6b applications, minimizing electrical stress and extending the life of your equipment.
• Integrated Precharging Resistors: Limits peak charging current, ensuring smooth operation and protecting the power supply from negative impacts.
• Wide Voltage Control: The 95-130 V AC/DC control supply voltage allows for versatile use in various control circuits.
• Enhanced Surge Protection: The integrated varistor effectively dampens opening surges, protecting the contactor coil and prolonging its lifespan.
• Auxiliary Contacts: Comes with a configuration of 1 NO (Normally Open) + 2 NC (Normally Closed) auxiliary contacts, providing flexibility for signaling and control circuits.
• Secure Connections: Features robust screw terminals for a reliable and secure connection.
• Compact Design: Size S0 form factor allows for space-efficient installation in control panels.
• Compliance with International Standards: Adheres to critical standards including IEC 60947‑1, IEC 60947‑4‑1, IEC 60947‑5‑1, IEC 60831‑1, and IEC 61921, ensuring quality and safety.

Function

The Siemens 3RT2627-1NF35 contactor functions by first engaging precharging resistors through its leading auxiliary contacts. This action reduces the high peak charging current that occurs when switching capacitive loads. After a short delay, the main contacts close, bypassing the resistors and providing the full current path. This two-step process effectively protects both the capacitor and the electrical network from damaging current surges. The integrated varistor further enhances the device’s reliability by suppressing voltage spikes on the control coil, a common cause of premature failure in contactors.

Application

This contactor is ideal for applications involving:

• Reactive Current Compensation Systems: Switching capacitors to improve power factor.
• Converter Systems: Managing capacitive loads in various power electronics applications.
• Industrial Automation: Controlling machinery with significant capacitive components.

Technical Specifications

• Product Number: 3RT2627-1NF35
• Product Type: Capacitor Contactor
• IEC Utilization Category: AC-6b
• Rated Capacitor Output: 25 kVAr at 400 V
• Number of Poles: 3-pole
• Control Supply Voltage: 95-130 V AC/DC, 50/60 Hz
• Auxiliary Contacts: 1 NO + 2 NC
• Terminal Type: Screw Terminal
• Size: S0
• Special Features: Integrated varistor, precharging resistors

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