Siemens SIRIUS 3RT2344-1AP60 Power Contactor AC-1, 110A, 4-Pole, 220V/240V AC Coil, S3 Size Original Brand New

Siemens SIRIUS 3RT2344-1AP60 Power Contactor – High Performance for AC-1 Application

The Siemens SIRIUS 3RT2344-1AP60 is a robust and reliable 4-pole power contactor, specifically designed for switching non-inductive or weakly inductive loads (AC-1) up to 110 Amperes at 400 V / 40 °C. Part of the renowned SIRIUS 3RT23 series, this S3 size contactor offers exceptional performance and versatility for a wide range of industrial applications, including disconnecting loads, power generation plants from the grid, and transfer switching.

Overview

The 3RT2344-1AP60 features a highly efficient 220 V AC (50 Hz) / 240 V AC (60 Hz) coil, ensuring dependable operation. It comes equipped with 1 normally open (NO) and 1 normally closed (NC) integrated auxiliary contacts, providing essential feedback and control capabilities. With its secure screw terminals, installation and wiring are straightforward and reliable.

Key Features & Benefit

• High Current Capacity: Rated for 110 A (AC-1) at 400 V / 40 °C, making it suitable for demanding non-inductive load applications.
• 4-Pole Design: Provides comprehensive switching capabilities for various circuit configurations.
• Flexible Coil Voltage: Operates on 220 V AC (50 Hz) or 240 V AC (60 Hz), offering compatibility with common industrial power supplies.
• Integrated Auxiliary Contacts: Includes 1 NO + 1 NC auxiliary contacts for seamless integration into control circuits and signaling.
• Reliable Screw Terminals: Ensures secure and durable electrical connections for main, auxiliary, and control circuits.
• Compact Size S3: Optimized dimensions for efficient space utilization within control panels.
• Enhanced Safety: Designed with provisions for robust short-circuit, overload, and overvoltage protection of all connections.
• Versatile Application: Ideal for switching resistive loads, heating elements, lighting, and general power distribution in industrial settings.
• Standards Compliance: Adheres to international standards including IEC 60947-1, IEC 60947-4-1, and IEC 60947-5-1 (for auxiliary switches), ensuring global applicability and safety.
• High Contact Reliability: Auxiliary contacts are optimized for low voltages (≤ 110 V) and currents (≤ 100 mA), ensuring reliable performance in solid-state circuits.
• Expandable Functionality: Can be easily expanded with additional auxiliary switches (sold separately) to meet evolving application requirements.
• Coil Replacement Capability: The solenoid coil can be replaced, extending the lifespan and serviceability of the contactor.

Function

• Switching of AC-1 Loads: Primarily functions as a robust switch for resistive, non-inductive, or weakly inductive loads.
• Load Disconnection: Effectively disconnects loads or power generation plants from the electrical grid.
• Transfer Switching: Capable of facilitating transfer switching operations in various electrical systems.
• Control Integration: Auxiliary contacts enable seamless integration into control logic for interlocking, signaling, and sequence control.
• Motor Protection Integration: Designed to be combined with Siemens 3RU2 thermal overload relays or 3RB3 electronic overload relays for comprehensive motor protection (for 3RT23 contactors used in motor applications).

Protection of Connections:

• Main Connections: Requires suitable short-circuit and overload protection. Refer to the technical product data sheet for free-standing contactors, or the Digital/Configuration Manuals for load feeders when combined with overload relays or circuit breakers.
• Auxiliary Connections: Refer to the technical product data sheet for specific protection guidelines.
• Control Supply Voltage Connections: Protection must align with relevant standards for control panel configuration. Selection of power supply with current-limiting function and consideration of inrush current peaks are crucial.

Connection Methods:

• Main Circuit: Screw terminals with box terminal. Direct connection to connecting bar possible with cable lugs when box terminal is removed.
• Auxiliary and Control Circuit: Screw terminals.

Compatibility & Accessories:

• Motor Protection Relays: Compatible with 3RU2 thermal overload relays and 3RB3 electronic overload relays for motor protection.
• Surge Suppressors: Can be equipped with RC elements, varistors, or diodes for coil damping (ordered separately).
• Auxiliary Switches: Expandable with additional auxiliary switches for increased control flexibility. Refer to “Auxiliary switches, instantaneous → Overview” for details.
• Spare Parts: Solenoid coil replacement is possible. Contacts can be replaced for 3RT233 contactors (check specific compatibility for 3RT2344-1AP60 in documentation).

Application

The Siemens 3RT2344-1AP60 contactor is an ideal choice for:

• Controlling resistive heating elements
• Switching lighting circuits
• Managing non-inductive motor loads
• Power distribution circuits
• Transfer switches for backup power systems
• Disconnecting power generation units
• Any application requiring reliable 4-pole switching of AC-1 loads

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