Siemens 3RT2636-1NB35 SIRIUS Capacitor Contactor, 50 kVAr, 400V, 20-33V AC/DC, Size S2 Original Brand New

Overview

The Siemens 3RT2636-1NB35 is a high-performance SIRIUS capacitor contactor designed for switching capacitive loads in reactive current compensation systems. This specialized contactor, part of the 3RT2 series, is engineered to handle AC-6b loads up to 50 kVAr at 400V. Its core function is to mitigate the high inrush currents associated with switching capacitors, thereby protecting the power network and extending the lifespan of connected equipment. The 3RT2636-1NB35 features integrated pre-charging resistors and a varistor for surge suppression, ensuring reliable and safe operation. With its 3-pole design, screw terminals, and a compact Size S2 footprint, it is a robust and efficient solution for power factor correction and converter applications.

Key Features & Functions

• Capacitive Load Switching: Specifically designed for AC-6b applications, the 3RT2636-1NB35 effectively switches capacitors up to 50 kVAr at 400 V, making it ideal for reactive power compensation systems.
• Integrated Pre-charging Resistors: Leading auxiliary contacts engage pre-charging resistors before the main contacts close. This limits the peak charging current of capacitive loads, minimizing stress on the power supply network and connected devices.
• Varistor for Surge Suppression: An integrated varistor protects the control supply voltage connections by damping opening surges in the coil, enhancing the contactor’s durability and reliability.
• Versatile Control Voltage: Operates with a wide control supply voltage range of 20-33 V AC/DC (50/60 Hz), offering flexibility in control circuit design.
• Robust Auxiliary Contacts: Equipped with two NC auxiliary contacts (2 Normally Closed), the contactor provides essential feedback and control signals for integration into complex systems.
• Screw Terminals: The secure screw terminals ensure a reliable and easy-to-install electrical connection.
• Compliance with Standards: Meets a comprehensive list of international standards, including IEC 60947-1, IEC 60947-4-1, IEC 60947-5-1, IEC 60831-1, and IEC 61921, guaranteeing quality and safety.
• Compact Size S2: The Size S2 form factor allows for efficient use of space within control panels and enclosures.

Benefits

• Improved Power Quality: By effectively switching capacitors, the 3RT2636-1NB35 helps improve power factor correction, leading to better energy efficiency and reduced utility costs.
• Extended Equipment Lifespan: The pre-charging resistors protect both the contactor and the capacitors from harmful inrush currents, significantly extending the service life of the entire compensation system.
• Enhanced System Reliability: The integrated varistor and robust design ensure stable and reliable operation, even in demanding industrial environments.
• Ease of Integration: The 3-pole design, standard screw terminals, and available expansion options for additional auxiliary switches simplify installation and system integration.
• Safety and Compliance: Adherence to multiple IEC standards ensures the product is safe, reliable, and suitable for use in a wide range of global applications.

Applications

The Siemens 3RT2636-1NB35 is suitable for a variety of applications requiring the switching of capacitive loads, including:

• Reactive current compensation systems
• Power factor correction
• Switching choked or unchoked capacitors
• Controlling converters and other capacitive loads

Standards

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

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