Siemens SIRIUS 3RT1055-6NB36 Power Contactor 150A, 75kW, 21-27.3V AC/DC PLC Input Original Brand New

Overview

The Siemens SIRIUS 3RT1055-6NB36 is a high-performance 3-pole power contactor designed for the switching and control of motors and other resistive loads up to 75 kW at 400 V. As part of the SIRIUS family, it offers exceptional reliability and a compact design, making it a perfect fit for a wide range of industrial applications. This model is equipped with a versatile 21-27.3V AC/DC PLC input and an electronic drive, providing superior flexibility and control in modern automation systems.

Key Features & Specification

• Product Number: 3RT1055-6NB36
• Type: Power Contactor
• Rated Operating Current: AC-3e/AC-3 150 A
• Rated Power: 75 kW @ 400 V
• Number of Poles: 3
• Operating Voltage (Control Circuit): Uc: 21-27.3 V AC (50-60 Hz) / DC
• PLC Input: 24 V DC
• Auxiliary Contacts: 2 NO (Normally Open) + 2 NC (Normally Closed)
• Drive Type: Electronic
• Main Circuit Connection: Busbar
• Control and Auxiliary Circuit Connection: Screw Terminal

Benefit

• Enhanced Reliability: Built with Siemens’ renowned engineering, this contactor ensures long-term, dependable performance in demanding industrial environments.
• Optimized for Automation: The 24V DC PLC input and electronic drive allow for direct integration into modern automation and control systems, reducing wiring complexity and improving signal accuracy.
• Flexible Application: Suitable for both AC and DC control circuits, offering a single solution for diverse control requirements.
• Space-Saving Design: Its compact size helps save valuable panel space, allowing for more efficient and organized control cabinets.
• Ease of Installation: The busbar connection for the main circuit simplifies wiring and reduces installation time, while screw terminals provide secure connections for control and auxiliary circuits.

Function

The Siemens 3RT1055-6NB36 power contactor is primarily used for switching electric motors. It acts as a remote-controlled switch, allowing a low-power control signal to turn on and off a high-power circuit. Its main functions include:

• Starting and stopping motors.
• Switching resistive loads (e.g., heating elements).
• Controlling lighting circuits.
• Serving as the main switching component in motor starter combinations.

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