Siemens 3RT1076-6NB36 Power Contactor, 500A, 250kW, 24V DC PLC Original Brand New

Overview

The Siemens 3RT1076-6NB36 power contactor from the SIRIUS 3RT1 series is a high-performance, robust switching device designed for the reliable control and protection of large industrial motors and high-current loads. Part of the modular SIRIUS system, this 3-pole contactor (Size S12) is engineered for efficiency and durability, offering superior switching capacity up to 500 A for AC-3 operation and a power rating of 250 kW at 400 V.

Featuring an electronic drive with a 24 V DC PLC input, the 3RT1076-6NB36 ensures highly reliable operation and easy integration into modern automation systems. Its main circuit uses secure busbar connections, while the control and auxiliary circuits utilize dependable screw terminals.

Benefit

• Optimized for Automation: Integrated 24V DC PLC input via electronic drive allows for seamless, direct connection to Programmable Logic Controllers (PLCs) and modern automation systems, simplifying wiring and reducing interface components.
• High Power Density: Handles substantial electrical loads up to 500 Amperes and 250 kW in a compact, Size S12 frame, maximizing space efficiency in control cabinets.
• Global Compatibility (IE3/IE4 Ready): Approved for worldwide use (IEC, UL/CSA) and suitable for highly efficient IE3/IE4 motors, future-proofing your motor control solutions.
• Versatile Control: Operates with a wide control voltage range of $21-27.3\text{ V}$, accepting both AC and DC, providing installation flexibility.
• Enhanced Functionality: Comes with pre-installed 2 NO + 2 NC auxiliary contacts, ready for complex control and signaling circuits, reducing the need for add-on blocks.
• Robust Connection: Features Busbar connection for the main circuit to handle high currents reliably and Screw Terminals for secure control/auxiliary wiring.

Function

The Siemens 3RT1076-6NB36 power contactor is primarily used for switching three-phase motors in industrial environments. It safely and reliably connects and disconnects the motor from the main power supply. Its key functions include:

1. Motor Switching: Starting and stopping high-power motors (up to 250 kW) under AC-3/AC-3e conditions.
2. Remote Control: Allowing remote or automatic control of the load circuit via the low-voltage PLC input.
3. Circuit Monitoring: Utilizing the integrated auxiliary contacts (2 NO + 2 NC) for signaling the contactor status to a PLC or other control devices.
4. Integration: Forming a key part of a load feeder when combined with an overload relay and circuit breaker.

Application

The 3RT1076-6NB36 contactor is perfectly suited for heavy-duty applications across various industries:

• Pumps and Pumping Stations
• Large Compressors and HVAC Systems
• Material Handling and Conveyor Systems
• Machine Tools and Process Machinery
• Industrial Fans and Ventilators

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