Siemens 3RT2617-1BF45 Capacitor Contactor, S00, 12.5 kVAr, 110V DC, 2 NC Original Brand New

Overview

The Siemens 3RT2617-1BF45 is a high-performance capacitor contactor designed for switching capacitive loads in reactive current compensation systems. Part of the SIRIUS 3RT2 series, this specialized S00-size contactor handles AC-6b loads up to 12.5 kVAr at 400 V. It features an integrated precharging resistor system, which is activated via leading auxiliary contacts to limit inrush currents. This innovative design minimizes electrical stress on the power supply network and extends the life of the connected capacitors. With a robust 110 V DC coil, screw terminals for secure wiring, and 2 normally closed (NC) auxiliary contacts, the 3RT2617-1BF45 is a reliable solution for demanding industrial applications.

Key Features & Benefit

• Optimized for Capacitive Loads (AC-6b): Specifically designed to manage high inrush currents associated with switching capacitors, ensuring reliable operation and network stability.
• Integrated Precharging Resistors: Leading auxiliary contacts bring precharging resistors online before the main contacts close, effectively dampening peak charging currents and preventing voltage dips.
• Long-Lasting Performance: By reducing electrical stress, the contactor protects both itself and the connected capacitors, leading to a longer service life and reduced maintenance costs.
• Versatile Application: Ideal for use in reactive current compensation systems, both choked and unchoked, and for switching converters.
• Compact S00 Size: The small form factor allows for efficient use of space within control panels and enclosures.
• Reliable DC Coil: The 110 V DC coil provides stable and consistent operation in various industrial environments.
• Flexible Connectivity: Equipped with screw terminals for robust and straightforward wiring.
• Built-in Auxiliary Contacts: Includes 2 NC auxiliary contacts for seamless integration into control circuits and signaling systems.
• Adherence to Global Standards: Compliant with major international standards, including IEC 60947-1, IEC 60947-4-1, and IEC 60831-1, guaranteeing quality and safety.

Functionality

The Siemens 3RT2617-1BF45 capacitor contactor operates by controlling the flow of current to capacitive loads. Its core functionality is the two-stage switching process:

1. Pre-charging: When the contactor is energized, the leading auxiliary contacts close first, engaging the precharging resistors. This allows a limited current to flow, gradually charging the capacitors and mitigating the initial surge.
2. Main Contact Engagement: Immediately after the pre-charging phase, the main contacts close, bypassing the resistors and allowing the full load current to flow to the now partially charged capacitors. This two-step process effectively manages the high peak currents, protecting the system from damaging electrical transients.

Protection and Safety

The device requires proper protection for all connections against short-circuit, overload, and overvoltage. Consult the technical product data sheet and configuration manuals for detailed information on selecting appropriate fuses, circuit breakers, and overload relays. For the control circuit, consider using surge suppressors (RC elements, varistors, diodes) to dampen opening surges and protect the coil.

Standard

• IEC 60947-1
• IEC 60947-4-1
• IEC 60947-5-1
• IEC 60831-1
• IEC 61921

Technical Specification

• Product Number: 3RT2617-1BF45
• Rated Power (AC-6b): 12.5 kVAr at 400 V
• Poles: 3-pole
• Operating Voltage: 110 V DC
• Auxiliary Contacts: 2 NC
• Terminal Type: Screw terminal
• Size: S00

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