Siemens 3RT1055-7AB36 Power Contactor AC-3e/AC-3 150A, 75kW, 23-26V AC/DC Coil, 3-Pole, 2NO+2NC Aux Original Brand New

Overview

The Siemens 3RT1055-7AB36 is a robust, high-performance power contactor from the SIRIUS series, designed for switching motors and other loads up to 150 A (AC-3e/AC-3). Engineered for industrial applications, it reliably controls three-phase AC and DC electrical circuits. This 3-pole contactor handles demanding motor control tasks up to 75 kW at 400 V. Its conventional drive and versatile terminal options make it an ideal choice for integrating into various control systems.

Key Specification

• Product Number: 3RT1055-7AB36
• Type: Power Contactor (SIRIUS)
• Performance: AC-3e/AC-3, 150 A, 75 kW at 400 V
• Coil Voltage (Uc): 23-26 V AC (50-60 Hz) / DC
• Poles: 3-pole
• Auxiliary Contacts: 2 NO + 2 NC (Normally Open + Normally Closed)
• Drive: Conventional
• Main Circuit Connection: Box Terminal (up to 70 mm²)
• Control/Auxiliary Circuit Connection: Screw Terminal

Benefit

• High Reliability: Designed by Siemens, a leader in industrial automation, ensuring long-term, dependable operation.
• Versatile Control: The 23-26V AC/DC coil allows for flexible integration into low-voltage control circuits.
• Comprehensive Auxiliary Contacts: Includes 2 NO and 2 NC contacts for comprehensive signaling, interlocking, and control circuit integration.
• Easy Installation: Features robust box terminals for secure and high-capacity main circuit wiring up to 70 mm².
• Space-Efficient Design: Part of the compact SIRIUS series, saving valuable cabinet space.
• Dual Standard Compliance: Rated for both AC-3 and the energy-efficient AC-3e standard.

Function

The 3RT1055-7AB36 contactor serves as the primary electrical switch in a control circuit, providing these essential functions:

1. Motor Switching: Controls the ON/OFF status of three-phase AC motors (up to 75 kW).
2. Remote Load Control: Allows for the remote activation and deactivation of high-current electrical loads.
3. Circuit Isolation: Safely isolates the load from the power source when de-energized.
4. Signal Feedback: The integrated 2 NO + 2 NC auxiliary contacts provide feedback to the PLC or control system about the contactor's status.

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