Siemens 3RT2348-1AK60 Contactor 4-Pole AC-1, 160A, 400V, 110V AC Coil, S3 Size Original Brand New

Siemens 3RT2348-1AK60 Contactor: Robust 4-Pole Power Switching for Industrial Applications

The Siemens 3RT2348-1AK60 is a high-performance 4-pole AC-1 contactor, engineered for reliable switching of resistive and non-inductive loads in industrial environments. With a rated current of 160 A at 400 V / 40 °C, this Size S3 contactor is a crucial component for power distribution, load disconnection, and transfer switching applications. Its 110 V AC (50 Hz) / 120 V AC (60 Hz) control coil, coupled with convenient screw terminals and integrated 1 NO + 1 NC auxiliary contacts, ensures versatile and secure operation.

Overview

The Siemens SIRIUS 3RT23 series contactors, including the 3RT2348-1AK60, are designed to meet stringent international standards, including IEC 60947-1, IEC 60947-4-1, and IEC 60947-5-1 (for auxiliary switches). This ensures high reliability and safety in various electrical systems. This specific model, part of the 3RT234 family, features robust screw terminals with box terminals, allowing for direct connection with cable lugs when the box terminal is removed, offering flexibility in wiring.

Key Benefit & Features:

• High Performance AC-1 Switching: Ideal for controlling 4-pole weak or non-inductive loads, disconnecting power generation plants, and transfer switching.
• Robust Current Rating: Handles up to 160 A at 400 V / 40 °C, suitable for demanding industrial applications.
• Integrated Auxiliary Contacts: Comes with 1 Normally Open (NO) and 1 Normally Closed (NC) auxiliary contacts for enhanced control and feedback.
• Versatile Coil Voltage: Operates with a 110 V AC (50 Hz) or 120 V AC (60 Hz) control supply, offering broad compatibility.
• Secure Screw Terminals: Provides reliable and easy wiring connections for main and auxiliary circuits.
• Compact Size S3: Optimized design for space efficiency within control panels.
• High Contact Reliability: Auxiliary contacts are designed for switching low voltages (≤ 110 V) and currents (≤ 100 mA), making them suitable for solid-state circuits.
• Overvoltage Protection Ready: Can be retrofitted with surge suppressors (RC elements, varistors, diodes) for coil damping, protecting against opening surges (accessories sold separately).
• Electromagnetic Compatibility (EMC): Fulfills requirements for environment category A, ensuring stable operation.

Function

The Siemens 3RT2348-1AK60 Contactor primarily functions as an electrically operated switch for:

• Four-pole switching of resistive and non-inductive loads (AC-1): Efficiently controls heating, lighting, and other non-motor loads.
• Disconnecting loads or power generation plants from the grid: Provides a safe and effective means of isolation.
• Transfer switching: Enables seamless transition between different power sources or circuits.
• Motor Protection Integration: Designed for easy mounting of 3RU2 thermal overload relays or 3RB3 electronic overload relays for comprehensive motor protection (for AC-3 applications with special versions of 3RT23).

Standards & Protection:

• Compliance: Meets IEC 60947-1, IEC 60947-4-1, IEC 60947-5-1 standards.
• Connection Protection: All connections require appropriate short-circuit and overload protection. Refer to technical data sheets and configuration manuals for detailed guidance on protecting main, auxiliary, and control supply connections.
• Overvoltage Protection: The contactor’s coil can be protected against overvoltage using optional surge suppressors.

Connection Methods:

• Main Circuit: Features robust screw terminals with box terminals. Direct connection via cable lugs is possible by removing the box terminal.
• Auxiliary and Control Circuit: Utilizes reliable screw terminals for secure wiring.

Operating Mechanism:

This 3RT23 contactor is equipped with a conventional AC operating mechanism, controlled via the A1-A2 control supply voltage connection.

Maintenance & Expandability:

• Solenoid Coil Replacement: The solenoid coil can be replaced for extended product life.
• Auxiliary Contact Expansion: The basic unit comes with two integrated auxiliary contacts (1 NO + 1 NC) and can be expanded with additional auxiliary switches as per permissible configurations.
• Accessories: A wide range of accessories and spare parts are available for the SIRIUS 3RT2 series contactors, including surge suppressors and additional auxiliary switches.

Application

• HVAC systems
• Lighting control panels
• Capacitor switching
• Resistive heating applications
• Power distribution boards
• Generator transfer switches

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