Siemens 3RT2625-1BB45 Capacitor Contactor, AC-6b 16.7 kVAr / 400 V, 3-Pole, 24V DC, Size S0, Screw Terminal Original Brand New

Overview: Siemens 3RT2625-1BB45 Capacitor Contactor

The Siemens 3RT2625-1BB45 is a high-performance capacitor contactor from the SIRIUS 3RT26 series, specifically engineered for switching capacitive loads in reactive power compensation systems. This robust and reliable 3-pole contactor is designed to handle loads up to 16.7 kVAr at 400 V (AC-6b), minimizing the impact of inrush currents on your power supply network.

This model features an integrated design with leading auxiliary contacts that engage precharging resistors before the main contacts close. This critical function effectively limits the peak charging current, enhancing the lifespan of your capacitors and improving overall system stability. With a 24V DC operating mechanism and a convenient screw terminal for secure wiring, the 3RT2625-1BB45 is a compact and efficient solution for professional electrical applications.

Key Benefit

• Extended Capacitor Lifespan: By limiting inrush currents, the contactor protects capacitors from premature wear and tear, reducing maintenance costs.
• Improved Power Quality: Minimizes voltage sags and disturbances on the power grid caused by large capacitive loads, leading to a more stable electrical system.
• Reliable Performance: Built to stringent IEC standards (IEC 60947, IEC 60831, etc.), ensuring safe and dependable operation in demanding industrial environments.
• Compact Design: The Size S0 form factor allows for efficient use of space within control panels and electrical cabinets.
• Versatile Application: Ideal for switching both choked and unchoked capacitors in reactive current compensation systems and for use with converters.

Features & Function

• Product Number: 3RT2625-1BB45
• Type: Capacitor Contactor
• Rated Load (AC-6b): 16.7 kVAr at 400 V
• Number of Poles: 3-pole
• Operating Coil Voltage: 24 V DC
• Auxiliary Contacts: 1 NO + 2 NC (Normally Open + Normally Closed)
• Connection Type: Screw Terminal
• Size: S0
• Integrated Precharging Resistors: Leading auxiliary contacts switch on resistors to limit inrush current, protecting the power network.
• Modular Expandability: Can be expanded with additional lateral auxiliary switches (for 3RT263/3RT264 models), offering configuration flexibility.
• Standards: Adheres to IEC 60947-1, IEC 60947-4-1, IEC 60947-5-1, IEC 60831-1, and IEC 61921.

Protection & Safety

The Siemens 3RT2625-1BB45 requires appropriate short-circuit and overload protection for its main and auxiliary connections. For detailed information on protecting device combinations, consult the Digital Configuration Manual for load feeders. The control supply voltage connections should be protected according to relevant standards and regulations, possibly using a current-limiting power supply or suitable circuit breakers. Optional surge suppressors (RC elements, varistors, etc.) can be retrofitted to the coil circuit to damp opening surges.

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