Siemens 3RT1076-6AU36 Power Contactor, 500A, 250kW, 240-277V UC, Size S12 Original Brand New

Overview

The Siemens 3RT1076-6AU36 SIRIUS Power Contactor is a robust, high-performance switching device designed for the control of three-phase electric motors and other significant loads in industrial applications. As part of the SIRIUS 3RT1 family (Size S12), this 3-pole contactor is engineered for maximum reliability and a long mechanical service life, making it ideal for heavy-duty operations. It is compatible with both AC and DC control voltages due to its wide-range operation coil, offering flexibility in plant design.

Technical Specifications & Features

The 3RT1076-6AU36 boasts industry-leading specifications:

• Part Number: 3RT1076-6AU36
• Product Series: SIRIUS 3RT1 Contactor (Size S12)
• Current Rating (AC-3e/AC-3): 500 A
• Power Rating: 250 kW at 400 V
• Poles: 3-pole
• Coil/Control Voltage (Uc): 240-277 V AC (50-60 Hz) / DC (Wide-range UC operation)
• Auxiliary Contacts: Pre-installed 2 NO + 2 NC
• Drive Type: Conventional
• Main Circuit Connection: Busbar connection
• Control/Auxiliary Circuit Connection: Screw terminal

Key Benefit

• Exceptional Power Handling: Rated for 500 A and 250 kW, capable of managing large motor loads in demanding industrial settings.
• Universal Coil Voltage (UC): The 240-277 V UC coil simplifies inventory and allows the contactor to be operated with both AC and DC control supplies without separate conversion.
• High Reliability: Designed for a long mechanical and electrical service life, minimizing downtime and maintenance costs.
• Integrated Auxiliary Contacts: Comes standard with 2 Normally Open (NO) and 2 Normally Closed (NC) contacts, providing immediate feedback and interlocking capabilities without needing external blocks.
• Easy Integration: Features busbar connections for the main circuit, allowing for fast and secure installation into power distribution systems.

Function & Application

The Siemens 3RT1076-6AU36 contactor is primarily used for:

• Switching 3-phase electric motors (AC-3/AC-3e duty).
• Controlling resistive loads (AC-1 duty, e.g., heating).
• Creating combination starters (in conjunction with an overload relay).
• Integration into automated control systems, including those requiring high-power switching capability directly from the control cabinet.

Typical applications include: large pumps, powerful fans, compressors, heavy-duty machinery, and main power control in industrial plants.

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