Siemens 3RT2344-1AK60 Contactor AC-1, 110A, 4-Pole, S3 Size, SIRIUS Industrial Control Original Brand New

Siemens 3RT2344-1AK60 SIRIUS Power Contactor – Reliable AC-1 Switching for Industrial Application

The Siemens 3RT2344-1AK60 is a high-performance 4-pole AC-1 contactor from the renowned SIRIUS family, designed for robust and reliable switching of non-inductive or weakly inductive loads in industrial environments. Engineered for efficiency and durability, this S3-sized contactor offers a substantial 110 A current rating at 400 V / 40 °C, making it an ideal choice for a wide range of power control applications.

Key Features & Benefit

• High Current Rating: Rated for AC-1 applications up to 110 A at 400 V / 40 °C, ensuring capability for demanding loads.
• 4-Pole Design: Provides versatile switching capabilities for multi-phase systems or applications requiring multiple breaking points.
• Integrated Auxiliary Contacts: Comes equipped with 1 NO (Normally Open) + 1 NC (Normally Closed) auxiliary contacts, offering flexible integration into control circuits for signaling and interlocking.
• Versatile Coil Voltage: Operates on a 110 V AC (50 Hz) / 120 V (60 Hz) control supply voltage, suitable for common industrial power systems.
• Robust Screw Terminals: Features reliable screw terminals for secure and straightforward wiring of main and auxiliary circuits.
• Compact S3 Size: Optimized for space efficiency within control panels while maintaining high performance.
• Compliance with Standards: Manufactured in accordance with international standards including IEC 60947-1, IEC 60947-4-1, and IEC 60947-5-1 (for auxiliary switches), ensuring safety and compatibility.
• Expandable Functionality: Supports the addition of further auxiliary switches for enhanced control and monitoring (see accessories).

Overview

The Siemens 3RT2344-1AK60 contactor is a vital component for power distribution and control in various industrial settings. Its design prioritizes reliability and ease of use, with features catering to comprehensive system protection and flexible connectivity.

Standards Compliance:

• IEC 60947‑1
• IEC 60947‑4‑1
• IEC 60947‑5‑1 (auxiliary switches)

Device Connection Protection:

The 3RT2344-1AK60 requires appropriate protection against short circuits, overload, and overvoltage across all connections to ensure safe and reliable operation.

• Main Connections: Refer to the technical product data sheet for specific short-circuit and overload protection details for free-standing contactors. For device combinations (e.g., with overload relay or circuit breaker), consult the Digital and Standard Configuration Manuals for load feeders.
• Auxiliary Connections: Protection information for auxiliary contacts can be found in the technical product data sheet.
• Control Supply Voltage: Adherence to relevant standards for control panel configuration and component installation (e.g., cable dimensioning) is crucial. Consider power supplies with current-limiting functions and appropriate protection devices, factoring in the contactor’s load characteristics (inrush current, switch-on power, holding power).

Overvoltage Protection (Control Supply Voltage):

While 3RT23 contactors like the 3RT2344-1AK60 are supplied without an integrated coil circuit, they can be easily retrofitted with external surge suppressors (RC elements, varistors, diodes, or diode assemblies) to damp opening surges in the coil. These accessories must be ordered separately. Note: Damping increases break times and delays of contacts.

Connection Methods:

• Main Circuit: The 3RT2344-1AK60 (3RT234 contactor) features robust screw terminals with a box terminal for secure connections. Direct connection with cable lugs is possible by removing the box terminal.
• Auxiliary and Control Circuit: Utilizes reliable screw terminals for straightforward wiring.

Electromagnetic Compatibility (EMC):

The 3RT2344-1AK60 fulfills requirements for environment category A, ensuring reliable operation in typical industrial settings. Note: When used with frequency converters, observe configuration notes in the Equipment Manual.

Contact Reliability of Auxiliary Contacts:

The integrated auxiliary contacts of the 3RT2344-1AK60 ensure high contact reliability, particularly suitable for switching voltages $\le$ 110 V and currents $\le$ 100 mA. They are also ideal for solid-state circuits with currents $\ge$ 1 mA at voltages of 17 V and higher.

Motor Protection Compatibility:

For overload protection, the Siemens 3RT2344-1AK60 can be paired with 3RU2 thermal overload relays or 3RB3 electronic overload relays, which can be directly mounted onto the contactor.

Operating Mechanism:

This contactor features a conventional AC operating mechanism, controlled via the A1 – A2 control supply voltage connection with varying operating ranges (refer to the technical product data sheet for details).

Solenoid Coil & Contact Replacement:

The solenoid coil of the 3RT2344-1AK60 can be replaced, offering extended service life. For 3RT234 contactors, the main contacts are also replaceable.

Auxiliary Contact Expansion:

The 3RT2344-1AK60 (a 3RT234 contactor) comes with two integrated auxiliary contacts (1 NO + 1 NC). The basic unit can be further expanded with additional auxiliary switches, adhering to permissible configurations.

Accessories and Spare Parts:

A wide range of accessories and spare parts are available for the SIRIUS 3RT2 contactor family, including surge suppressors, additional auxiliary switches, and various connection components.

Application Areas:

The Siemens 3RT2344-1AK60 contactor is perfectly suited for applications requiring:

• Four-pole switching of non-inductive or weakly inductive loads (AC-1).
• Disconnecting loads or power generation plants from the grid.
• Transfer switching operations.

For specialized applications involving motor-driven loads (AC-3), Siemens offers specific versions of the 3RT23 contactors.

For more Siemens industrial control products and solutions, visit Turll.com.