Siemens 3RT2628-1NP35 SIRIUS Capacitor Contactor 33 kVAr 400V, S0, 200-280V AC/DC, Screw Terminal Original Brand New

Overview

The Siemens 3RT2628-1NP35 is a high-performance SIRIUS capacitor contactor specifically engineered for switching capacitive loads in reactive current compensation systems. This specialized S0 size contactor is designed to handle loads up to 33 kVAr at 400 V (AC-6b), making it ideal for managing power factor correction. Its key feature is the integration of precharging resistors, which are engaged by leading auxiliary contacts.

This innovative design effectively limits the peak inrush current, minimizing stress on the electrical grid and prolonging the life of your capacitors and equipment. With a versatile 200-280 V AC/DC control voltage, integrated varistor for surge suppression, and a robust 1 normally open (NO) + 2 normally closed (NC) auxiliary contact configuration with screw terminals, the 3RT2628-1NP35 offers reliability, safety, and efficiency for demanding industrial applications.

Key Benefit

• Extended Equipment Lifespan: The built-in precharging resistors effectively limit peak charging currents, protecting both the contactor and the capacitors from harmful inrush currents.
• Grid Stability: By minimizing negative impacts on the power supply network, this contactor contributes to improved power quality and grid stability.
• Versatile Control: The wide 200-280 V AC/DC control voltage range allows for flexible integration into various control systems.
• Enhanced Safety: An integrated varistor provides superior protection against overvoltage surges, safeguarding the control coil from damage.
• Reliable Connections: Robust screw terminals ensure secure and durable electrical connections, reducing the risk of faults.
• Easy Integration: The compact S0 size and 1 NO + 2 NC auxiliary contact configuration with the leading auxiliary contacts simplify installation and integration into existing control panels and systems.

Key Function

• Capacitive Load Switching (AC-6b): Designed to reliably switch choked or unchoked capacitors up to 33 kVAr at 400 V.
• Inrush Current Limitation: Utilizes leading auxiliary contacts and integrated precharging resistors to limit the high peak charging currents associated with switching capacitors.
• Overvoltage Protection: The integrated varistor protects the contactor’s coil circuit from voltage spikes, ensuring long-term operational integrity.
• Auxiliary Switching: Provides a 1 NO + 2 NC auxiliary contact arrangement for signaling, interlocking, and other control functions.
• Standard Compliance: Meets international standards including IEC 60947-1, IEC 60947-4-1, IEC 60947-5-1, IEC 60831-1, and IEC 61921, guaranteeing quality and safety.

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