Siemens SIRIUS 3RT2637-1AB03 Capacitor Contactor, AC-6b 75kVAr / 400V, 24V AC Coil, S2 Frame Original Brand New

Overview

The Siemens SIRIUS 3RT2637-1AB03 is a specialized capacitor contactor from the SIRIUS 3RT2 series, engineered for switching capacitive loads in reactive power compensation systems. This robust S2 frame contactor is designed for AC-6b applications up to 75 kVAr at 400 V, making it an ideal choice for minimizing electrical network disturbances. Its unique design features precharging resistors activated by leading auxiliary contacts, which effectively limit inrush current peaks and protect the electrical system.

The 3RT2637-1AB03 comes equipped with a 24 V AC, 50 Hz control coil and a 1 NO + 1 NC auxiliary contact configuration, all connected via reliable screw terminals. This contactor is a crucial component for ensuring the stability and efficiency of power grids by managing the switching of both choked and unchoked capacitors.

Key Features & Benefit

• Optimized for Capacitive Loads (AC-6b): Specifically engineered to handle the high inrush currents associated with switching capacitors, ensuring reliable and long-lasting operation.
• Integrated Precharging Resistors: Leading auxiliary contacts engage precharging resistors before the main contacts close, drastically limiting current peaks and reducing stress on the network and connected equipment.
• Enhanced Network Stability: Minimizes negative impacts on the power supply network by controlling inrush currents, leading to improved power quality and reduced harmonic distortion.
• Durable and Reliable: Built to IEC standards (IEC 60947-1, IEC 60947-4-1, etc.), guaranteeing high performance and safety in demanding industrial environments.
• Versatile Application: Suitable for switching capacitors in reactive current compensation systems and for use with converters.
• Convenient Auxiliary Contacts: Includes one normally open (NO) and one normally closed (NC) auxiliary contact for seamless integration into control circuits and signaling.
• Standardized Size (S2 Frame): Allows for easy integration into existing control panels and equipment configurations.
• Flexible Protection Options: Supports various short-circuit and overload protection methods for both main and auxiliary circuits.

Technical Specifications

• Product Type: Capacitor Contactor
• Product Number: 3RT2637-1AB03
• Standard Designation: SIRIUS
• Rated Power (AC-6b): 75 kVAr at 400 V
• Number of Poles: 3-pole
• Control Supply Voltage: 24 V AC, 50 Hz
• Auxiliary Contacts: 1 NO + 1 NC
• Terminal Type: Screw terminal
• Size: S2 frame
• Standards: IEC 60947-1, IEC 60947-4-1, IEC 60947-5-1, IEC 60831-1, IEC 61921
• Application: Switching of choked or unchoked capacitors in reactive power compensation systems and converters.
• Damping: Can be retrofitted with surge suppressors (RC elements, varistors, etc.) for coil protection (sold separately).

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