Siemens 3RT2348-1AF00 Contactor 160A AC-1, 4-Pole, 110V AC Original Brand New

Siemens 3RT2348-1AF00 SIRIUS 3RT23 Power Contactor for AC-1 Applications

Overview

The Siemens 3RT2348-1AF00 is a robust and reliable 4-pole power contactor from the SIRIUS 3RT23 series, engineered for switching weak or non-inductive loads (AC-1) up to 160 A at 400 V (40 °C). This size S3 contactor features a 110 V AC, 50 Hz operating mechanism and comes equipped with 1 normally open (NO) and 1 normally closed (NC) auxiliary contact, providing versatile control options. Designed with convenient screw terminals for secure connections, the 3RT2348-1AF00 is an essential component for critical industrial applications requiring dependable load isolation, transfer switching, and general four-pole switching.

Benefit

• Reliable Performance: Ensures safe and consistent switching of electrical loads, contributing to operational stability.
• Versatile Application: Ideal for a range of uses including disconnecting loads from the grid, transfer switching, and general non-inductive load control.
• Enhanced Safety: Built-in auxiliary contacts offer additional control and feedback, improving system safety and diagnostics.
• Easy Installation: Screw terminals provide a straightforward and secure connection for main, auxiliary, and control circuits.
• High Contact Reliability: Auxiliary contacts are designed for high reliability, particularly suitable for low voltages (≤ 110 V) and currents (≤ 100 mA), making them perfect for solid-state circuits.
• Expandable Functionality: The basic unit can be expanded with additional auxiliary switches (sold separately) for increased control flexibility.

Function & Technical Details

• Application: The 3RT23 contactors are specifically designed for 4-pole switching of weak or non-inductive loads (AC-1). They are widely used for disconnecting loads or power generation plants from the grid and for transfer switching applications. While this model is for AC-1, Siemens also offers special 3RT23 versions for motor-driven loads (AC-3).
• Standards & Protection:
  • Complies with international standards: IEC 60947-1, IEC 60947-4-1, and IEC 60947-5-1 (for auxiliary switches).
  • Protection of Device Connections: All connections (main, auxiliary, control supply) require protection against short-circuit, overload, and overvoltage using suitable external measures. Refer to the technical product data sheet for detailed protection guidelines for free-standing contactors. For device combinations (e.g., with overload relays or circuit breakers), consult the Digital Configuration Manuals for load feeders.
  • Overvoltage Protection: 3RT23 contactors can be retrofitted with surge suppressors (RC elements, varistors, diodes) for coil damping, available as accessories. Note that damping may increase contactor break times and auxiliary contact delays.
• Connection Methods:
  • Main Circuit: The 3RT2348-1AF00 (3RT234 contactor) utilizes screw terminals with a box terminal for robust main circuit connections. Direct connection to the connecting bar with cable lugs is possible by removing the box terminal.
  • Auxiliary and Control Circuit: Equipped with reliable screw terminals for easy wiring of auxiliary and control circuits.
• Electromagnetic Compatibility (EMC): These contactors meet the requirements for environment category A. For use with frequency converters, specific configuration notes in the Equipment Manual must be observed.
• Motor Protection Integration: For comprehensive motor protection against overload, 3RU2 thermal overload relays or 3RB3 electronic overload relays can be directly mounted onto 3RT23 contactors, creating a compact and efficient motor feeder solution.
• Operating Mechanism: This specific model features a conventional AC operating mechanism. Control is via the A1-A2 control supply voltage connection with defined operating ranges (refer to the technical product data sheet for details).
• Maintenance & Expandability:
  • Solenoid Coil: The solenoid coil for the 3RT2348-1AF00 (3RT234 contactor) is replaceable, simplifying maintenance.
  • Auxiliary Contact Expansion: The basic unit of the 3RT2348-1AF00 includes two integrated auxiliary contacts (1 NO + 1 NC). Further expansion is possible by mounting additional auxiliary switches. Refer to the “Auxiliary switches, instantaneous” overview for detailed information on permissible configurations.
• Accessories & Spare Parts: A wide range of accessories and spare parts are available for SIRIUS 3RT2 contactors, including surge suppressors, terminal covers, and various auxiliary switch blocks. Please refer to the dedicated accessory ordering data for more information.

Browse more Siemens products at Turll.