Siemens 3RT2627-1BF45 SIRIUS Capacitor Contactor AC-6b 25 kVAr, 110V DC, Size S0 Original Brand New

Overview

The Siemens 3RT2627-1BF45 is a high-performance SIRIUS 3RT26 series capacitor contactor specifically engineered for the reliable and efficient switching of capacitive loads. Designed to meet the demanding requirements of AC-6b applications, this contactor is ideal for use in reactive current compensation systems and for switching converters. It is part of the comprehensive SIRIUS modular system, ensuring seamless integration and robust performance in industrial control environments.

Benefits

• Minimized Peak Currents: The integrated precharging resistors, activated by leading auxiliary contacts, significantly reduce the peak inrush current of capacitive loads. This protects your power supply network and extends the life of connected equipment.
• Enhanced System Stability: By effectively managing capacitive loads, this contactor helps maintain power quality and system stability in applications like power factor correction.
• Reliable Performance: Built to Siemens’ high-quality standards and complying with international IEC regulations, the 3RT2627-1BF45 offers exceptional reliability and a long service life.
• Versatile Application: Suitable for both choked and unchoked capacitors, as well as for switching converters, providing flexibility for a wide range of industrial applications.
• Easy Integration: As part of the SIRIUS family, it is designed for straightforward installation and integration with other Siemens control components.

Functionality & Protection

The core functionality of the 3RT2627-1BF45 lies in its unique design for switching capacitive loads. The contactor’s precharging resistors are a critical component, engaging just before the main contacts close. This precharging process limits the high-current peaks that are characteristic of switching capacitors, thereby minimizing electrical stress on the system.

• Short-Circuit & Overload Protection: All connections (main, auxiliary, and control) must be protected with appropriate measures. Refer to the technical data sheet for protection details of the free-standing contactor. For device combinations, consult the Digital Configuration Manual for load feeders.
• Overvoltage Protection: The contactor can be retrofitted with optional surge suppressors (RC elements, varistors, or diodes) to dampen opening surges in the coil, protecting sensitive control circuits.
• Auxiliary Contacts: The basic unit comes with two free auxiliary contacts (1 NO + 1 NC). These can be used for signaling, interlocking, or other control circuit functions. The integrated auxiliary switch for the precharging resistors is a fixed component of the design.

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