Siemens 3RT2626-1NB35 SIRIUS Capacitor Contactor AC-6b 20 kVAr, 400V, 21-28V AC/DC, Size S0 Original Brand New

Overview

The Siemens 3RT2626-1NB35 is a high-performance SIRIUS capacitor contactor designed for the reliable switching of capacitive loads up to 20 kVAr at 400V. As part of the SIRIUS 3RT26 series, this contactor is engineered to minimize the negative impact of high inrush currents on power supply networks, making it an essential component for power factor correction systems, reactive current compensation, and converter applications.

A key feature of the 3RT2626-1NB35 is its innovative design with integrated precharging resistors. These resistors are switched into the circuit via leading auxiliary contacts, which close just before the main contacts.

This action effectively limits the peak charging current of the capacitors, reducing stress on the electrical system and extending the lifespan of both the contactor and the connected equipment.

This model is a 3-pole device with a control supply voltage of 21-28V AC/DC, making it highly versatile for various control circuits. It comes equipped with an integrated varistor for surge suppression, and its auxiliary contact configuration of 1 NO + 2 NC provides ample signaling and control options.

The contactor features robust screw terminals for secure and reliable wiring and has a compact size S0 form factor, ideal for space-constrained control panels.

Benefits

• Extended Equipment Lifespan: The precharging resistors and integrated varistor protect the contactor and connected capacitors from damaging inrush currents and voltage spikes.
• Improved Power Quality: By effectively switching capacitive loads, the 3RT2626-1NB35 helps to maintain stable power supply networks and enhance overall system efficiency.
• Versatile Control: The wide 21-28V AC/DC control voltage range and auxiliary contact configuration (1 NO + 2 NC) allow for flexible integration into a variety of control circuits.
• Reliable Operation: Built to meet stringent international standards (IEC 60947 series), this contactor ensures safe and dependable performance in demanding industrial environments.
• Easy Installation: The compact size S0 and user-friendly screw terminals simplify mounting and wiring, reducing installation time and effort.

Functions

• Capacitor Switching: Designed specifically for AC-6b duty, providing controlled and reliable switching of both choked and unchoked capacitors.
• Inrush Current Limitation: Utilizes leading auxiliary contacts and precharging resistors to limit the peak charging current of capacitive loads.
• Surge Suppression: An integrated varistor protects the control coil from damaging voltage surges.
• Auxiliary Signaling: The 1 NO + 2 NC auxiliary contacts provide status feedback and enable control of other components in the circuit.
• Overload and Short-Circuit Protection: Can be combined with suitable protection devices to safeguard main and auxiliary circuits.

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