Siemens 3RT2348-1AB00 SIRIUS Contactor AC-1, 160A, 4-Pole, 24V AC, S3, Screw Terminal Original Brand New

Overview

The Siemens 3RT2348-1AB00 is a robust 4-pole power contactor from the SIRIUS family, specifically designed for AC-1 applications. This high-performance contactor is engineered to switch weak or non-inductive loads up to 160 A at 400 V (at 40 °C), making it ideal for a wide range of industrial and commercial uses including disconnecting loads or power generation plants from the grid, and transfer switching. Featuring a reliable 24 V AC (50 Hz) operating mechanism and convenient screw terminals, the Size S3 unit also includes integrated 1 NO + 1 NC auxiliary contacts for versatile control circuit integration. Built to IEC standards, this contactor ensures reliable and safe operation in demanding environments.

Key Benefit

• High Power Switching Capacity: Rated for 160 A (AC-1) at 400 V, suitable for heavy-duty non-inductive loads.
• Reliable 4-Pole Design: Ensures secure and effective switching for various applications.
• Integrated Auxiliary Contacts: Comes with 1 Normally Open (NO) and 1 Normally Closed (NC) contact for simplified control circuit wiring and expanded functionality.
• Durable Screw Terminals: Provides secure and robust connections for main and auxiliary circuits.
• Compact Size S3: Optimized dimensions for efficient panel space utilization.
• Enhanced Safety & Protection: Designed with provisions for short-circuit, overload, and overvoltage protection for all connections.
• IEC Standard Compliance: Adheres to IEC 60947-1, IEC 60947-4-1, and IEC 60947-5-1, guaranteeing quality and interoperability.
• Electromagnetic Compatibility: Fulfills requirements for environment category A, ensuring reliable operation in industrial settings.
• Versatile Application: Ideal for switching weak/non-inductive loads, grid disconnection, and transfer switching.

Function & Features:

• AC-1 Application Specific: Optimized for switching resistive or slightly inductive loads, ensuring efficient power management.
• 24 V AC Operating Mechanism: Standard 24 V AC (50 Hz) coil for straightforward integration into control systems.
• Connection Methods:
  • Main Circuit: Screw terminals with box terminal design, allowing direct connection to connecting bars with cable lugs (when box terminal is removed).
  • Auxiliary & Control Circuit: Reliable screw terminals.
• Auxiliary Contact Reliability: High contact reliability for switching low voltages (≤ 110 V) and currents (≤ 100 mA), suitable for solid-state circuits.
• Motor Protection Compatibility: Seamlessly integrates with Siemens 3RU2 thermal overload relays or 3RB3 electronic overload relays for comprehensive motor protection (when used in motor applications, though primarily AC-1).
• Overvoltage Protection (Optional): Can be retrofitted with RC elements, varistors, diodes, or diode assemblies for damping opening surges in the coil (accessories sold separately).
• Replaceable Solenoid Coil: Facilitates maintenance and extends product lifespan.
• Expandable Auxiliary Switches: Basic unit can be expanded with additional auxiliary switches (permissible configuration must be observed) for increased control flexibility.

Standards Compliance:

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

Protection Considerations:

• Main Connections: Requires suitable short-circuit and overload protection; refer to technical product data sheet for free-standing contactor details or digital/configuration manuals for device combinations (contactor with overload relay/circuit breaker).
• Auxiliary Connections: Short-circuit and overload protection information available in the technical product data sheet.
• Control Supply Voltage: Protection should align with relevant standards for control panel configuration, considering load characteristics (inrush current, switch-on power, holding power). Use of power supplies with current-limiting function or suitable miniature/circuit breakers recommended.
• Overvoltage at Control Supply: Coil damping accessories (RC elements, varistors, diodes) available for separate order to mitigate opening surges.

Application

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

Accessories & Spare Parts:

For a complete list of compatible accessories and spare parts, refer to the “Accessories and spare parts for SIRIUS 3RT2 contactors and SIRIUS 3RH2 contactor relays” documentation. Examples include surge suppressors and additional auxiliary switches.