Siemens 3RT2344-1AB00 Contactor, AC-1, 110A, 4-Pole, 24V AC, S3 Size Original Brand New

Overview

The Siemens 3RT2344-1AB00 is a robust and reliable 4-pole contactor from the SIRIUS 3RT2 series, specifically designed for switching non-inductive or weakly inductive loads (AC-1 applications). With a rated current of 110 A at 400 V / 40 °C, this Size S3 contactor is ideal for demanding industrial environments. It features a 24 V AC, 50 Hz operating mechanism and comes equipped with 1 normally open (NO) and 1 normally closed (NC) integrated auxiliary contacts for enhanced control flexibility. Its convenient screw terminals ensure secure and straightforward installation, making it a valuable component for various electrical distribution and control panel applications.

Benefit

• Reliable Performance: Engineered by Siemens, a leader in industrial automation, ensuring high-quality and long-lasting operation.
• Versatile Application: Perfectly suited for four-pole switching of weak or non-inductive loads, disconnecting power generation plants, and transfer switching.
• Enhanced Control: Integrated 1 NO + 1 NC auxiliary contacts provide immediate feedback and control possibilities for complex circuits.
• Easy Installation: Screw terminals simplify wiring, reducing installation time and effort.
• Robust Design: Built to withstand demanding industrial conditions, offering dependable performance in various environments.
• Expandable: Can be expanded with additional auxiliary switches for increased functionality (refer to documentation for permissible configurations).

Function

• Switching AC-1 Loads: Primarily functions as a reliable switch for resistive or slightly inductive loads in AC circuits.
• Disconnecting Loads/Power Plants: Capable of safely disconnecting loads or power generation plants from the electrical grid.
• Transfer Switching: Facilitates the transfer of electrical power between different sources.
• Control Circuit Integration: Auxiliary contacts enable seamless integration into control circuits for signaling and interlocking functions.

Technical Details & Considerations:

• Protection of Device Connections: All connections must be protected against overload and short circuits. Refer to the technical product data sheet and configuration manuals for detailed guidance on protecting main, auxiliary, and control supply voltage connections.
• Overvoltage Protection: The 3RT23 contactors can be retrofitted with surge suppressors (RC elements, varistors, diodes) for damping opening surges in the coil. Note that damping increases break times and opening/closing delay times of contacts.
• Connection Methods:
  • Main Circuit: Screw terminals with box terminal. Direct connection with cable lugs is possible when the box terminal is removed.
  • Auxiliary and Control Circuit: Screw terminals.
• Electromagnetic Compatibility: Meets requirements for environment category A. Observe configuration notes when used with frequency converters.
• Contact Reliability of Auxiliary Contacts: High contact reliability for switching voltages $\le$ 110 V and currents $\le$ 100 mA, suitable for solid-state circuits with currents $\ge$ 1 mA at 17 V and higher.
• Motor Protection: For overload protection, compatible with 3RU2 thermal overload relays or 3RB3 electronic overload relays (sold separately).
• Operating Mechanism: Conventional AC operating mechanism (24 V AC, 50 Hz).
• Solenoid Coil & Contact Replacement: Solenoid coil replacement is possible. For 3RT233 contactors, only the contacts can be replaced (though this specific product is a 3RT2344, verify specific replacement options in the technical data sheet).
• Auxiliary Contact Configuration: Basic unit contains two integrated auxiliary contacts (1 NO + 1 NC). Expansion with additional auxiliary switches is possible, adhering to permissible configurations.
• Accessories & Spare Parts: A wide range of accessories and spare parts are available for SIRIUS 3RT2 contactors (refer to relevant Siemens documentation or Turll for ordering data).

Application

The Siemens 3RT2344-1AB00 contactor is an ideal solution for a variety of industrial applications, including:

• Control panels for general industrial machinery
• Building automation systems
• Heating, ventilation, and air conditioning (HVAC) systems
• Lighting control
• Power distribution circuits
• Any application requiring reliable switching of non-inductive AC loads.

For more industrial automation products and solutions, visit Turll.