Siemens 3RT2628-1AB05 Capacitor Contactor, AC-6b, 33 kVAr, 400V, 24V AC, Size S0 Original Brand New

Overview

The Siemens 3RT2628-1AB05 is a high-performance capacitor contactor designed for switching capacitive loads in reactive current compensation systems. As part of the SIRIUS series, this contactor is specifically engineered to handle the demands of AC-6b applications, featuring precharging resistors that limit inrush currents. This robust design minimizes negative impacts on the power supply network and ensures reliable operation. With a compact Size S0 frame and screw terminals, it offers a space-saving and secure solution for industrial control panels.

Key Features & Function

• Capacitive Load Switching (AC-6b): Specifically designed for switching capacitive loads up to 33 kVAr at 400V, making it ideal for reactive power compensation systems.
• Integrated Precharging Resistors: Leading auxiliary contacts engage precharging resistors before the main contacts close, effectively limiting the peak charging current and protecting the power network.
• Auxiliary Contacts: Equipped with 1 NO (Normally Open) and 2 NC (Normally Closed) auxiliary contacts, providing flexibility for control and signaling circuits.
• Control Voltage: Operates with a control supply voltage of 24 V AC, 50 Hz.
• Robust Construction: Features a durable 3-pole design and screw terminals for secure and reliable electrical connections.
• Standards Compliance: Meets international standards including IEC 60947-1, IEC 60947-4-1, IEC 60947-5-1, IEC 60831-1, and IEC 61921, ensuring safety and quality.
• Versatile Application: Suitable for switching choked or unchoked capacitors in compensation systems and for switching converters.

Benefit

• Extended Equipment Life: By limiting inrush currents, the precharging resistors protect the contactor and connected capacitors from excessive stress, leading to a longer service life.
• Improved Power Quality: Minimizes voltage fluctuations and disturbances in the power supply network, contributing to a more stable electrical system.
• Reliable Performance: The robust design and high-quality components ensure consistent and dependable operation in demanding industrial environments.
• Easy Integration: The compact Size S0 and screw terminal connections facilitate straightforward installation and integration into existing control panels.
• Flexible Control: The included auxiliary contacts allow for a wide range of control and monitoring functions.

Technical Specification

• Product Number: 3RT2628-1AB05
• Product Type: Capacitor Contactor
• Rated Operational Power (AC-6b): 33 kVAr at 400 V
• Number of Poles: 3
• Control Supply Voltage: 24 V AC, 50 Hz
• Auxiliary Contacts: 1 NO + 2 NC
• Terminal Type: Screw Terminal
• Size: S0
• Standards: IEC 60947-1, IEC 60947-4-1, IEC 60947-5-1, IEC 60831-1, IEC 61921
• Manufacturer: Siemens

Protection and Safety

The device connections must be protected against short circuits, overloads, and overvoltages. Refer to the technical product data sheet for specific protection requirements for main, auxiliary, and control supply voltage connections. Optional surge suppressors (RC elements, varistors, etc.) are available as accessories to protect the control supply voltage connection from overvoltage spikes.

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