Siemens 3RT2625-1NB35 SIRIUS Capacitor Contactor 16.7 kVAr, 400V, 21-28V AC/DC Original Brand New

Overview

The Siemens 3RT2625-1NB35 is a SIRIUS series capacitor contactor specifically engineered for switching capacitive loads in reactive current compensation systems and for use with converters. This specialized 3-pole contactor is designed to handle loads up to 16.7 kVAr at 400 V (AC-6b). Its key feature is the integration of precharging resistors, which are engaged via leading auxiliary contacts.

This innovative design limits the inrush current, preventing stress on the power supply network and ensuring reliable and efficient operation. With a versatile 21-28 V AC/DC control supply and integrated varistor for surge suppression, this Size S0 contactor offers robust performance and enhanced protection. It comes equipped with 1 NO and 2 NC auxiliary contacts and secure screw terminals for easy and reliable wiring.

Key Benefits

• Extended Equipment Life: The built-in precharging resistors effectively limit peak charging currents, minimizing stress on both the capacitor and the power supply network.
• Enhanced Reliability: Designed for the specific demands of capacitive loads (AC-6b), ensuring stable and reliable switching operations.
• Flexible Control: The wide 21-28 V AC/DC control voltage range makes it highly adaptable for various control panel configurations.
• Increased Protection: The integrated varistor provides superior surge suppression, protecting the contactor’s coil and improving overall system durability.
• Versatile Integration: Multiple auxiliary contacts (1 NO + 2 NC) allow for seamless integration into complex control circuits and signaling systems.
• Easy Installation: Features robust screw terminals for secure and straightforward wiring.

Functions

• Capacitive Load Switching (AC-6b): Switches choked or unchoked capacitors in reactive power compensation systems.
• Inrush Current Limitation: Utilizes leading auxiliary contacts and precharging resistors to limit the peak charging current of capacitive loads.
• Surge Suppression: The integrated varistor protects the coil from damaging voltage spikes caused by inductive loads.
• Control & Signaling: The multiple auxiliary contacts provide feedback and control signals for the wider system.

Protection

• Short-circuit and Overload Protection: The device must be protected against short circuits and overloads using suitable measures. Refer to the technical product data sheet for specific recommendations on protecting main, auxiliary, and control supply connections. For comprehensive solutions, consult the Siemens Digital Configuration Manual for load feeders.
• Overvoltage Protection: The integrated varistor provides a high level of protection against overvoltage on the control supply connection.

Expansion Possibilities

The Siemens 3RT2625-1NB35 contactor can be expanded with additional lateral auxiliary switches to meet specific application requirements.

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