Overview: Siemens 3RT2027-1AB00 SIRIUS Power Contactor
The Siemens 3RT2027-1AB00 is a high-performance, compact 3-pole power contactor from the SIRIUS 3RT2 family, specifically designed for switching motors in industrial applications. This robust device features a rated operational current of 32 A for AC-3/AC-3e duty (motor switching) and a rated operating power of 15 kW at 400 V.
It is equipped with a reliable 24 V AC (50 Hz) operating coil and includes one integrated Normally Open (NO) and one Normally Closed (NC) auxiliary contact for signaling and interlocking. The dependable screw terminals ensure a secure and maintenance-friendly connection for both the main circuit and control wiring. Its compact Size S0 makes it ideal for panel space optimization.
Benefit
- Reliability: Part of the proven Siemens SIRIUS modular system, ensuring high contact reliability and a long mechanical service life.
- Space-Saving: The compact Size S0 design minimizes panel footprint.
- Ease of Wiring: Convenient screw terminals for straightforward and secure installation.
- System Integration: Fully compatible with a comprehensive range of SIRIUS accessories (e.g., overload relays, auxiliary switch blocks) to create complete load feeders.
- Global Standard: Approved for worldwide use (e.g., IEC and UL/CSA), making it suitable for international machine builders.
Function
The Siemens 3RT2027-1AB00 functions as an electromagnetically operated switch. When the 24V AC control voltage is applied to the coil, it closes the three main contacts, allowing the 32A/15kW load (typically a motor) to be powered. Simultaneously, the integrated 1 NO and 1 NC auxiliary contacts switch state, providing crucial feedback or control signals to the automation system (e.g., PLC). It is primarily used for switching:
- Three-phase motors (AC-3/AC-3e duty)
- Resistive loads (AC-1 duty, e.g., heating)
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