Siemens 3RT2348-1NF30 Contactor AC-1, 160A, 4-Pole, 83-155V AC/DC, S3 Size Original Brand New

Siemens 3RT2348-1NF30 Contactor: High-Performance AC-1 Switching for Industrial Application

The Siemens 3RT2348-1NF30 is a robust and versatile 4-pole contactor designed for reliable switching of AC-1 (non-inductive or weakly inductive) loads up to 160 A at 400 V / 40 °C. Part of the SIRIUS 3RT2 series, this Size S3 contactor is engineered for demanding industrial environments, offering integrated protection and flexible connectivity options.

Key Features & Benefit

• High Current Rating: Handles up to 160 A for AC-1 applications, making it suitable for a wide range of resistive loads, heating, and power distribution.
• Wide Control Voltage Range: The 83-155 V AC/DC operating mechanism with an integrated varistor ensures reliable operation across various control supply voltages and provides essential surge suppression for enhanced coil longevity.
• Integrated Auxiliary Contacts: Comes equipped with 1 normally open (NO) and 1 normally closed (NC) auxiliary contact, providing immediate feedback for control circuits and enabling complex interlocking.
• Secure Screw Terminals: Features robust screw terminals for secure and straightforward wiring of main and auxiliary circuits.
• Compact Size S3: Optimized design for efficient use of space within control panels.
• Compliance with Standards: Adheres to international standards including IEC 60947-1, IEC 60947-4-1, and IEC 60947-5-1 (for auxiliary switches), ensuring safety and performance.
• Enhanced Reliability: The integrated varistor provides crucial protection against overvoltage spikes, extending the lifespan of the contactor coil. Auxiliary contacts are designed for high contact reliability, even at low voltages and currents (≤ 110 V / ≤ 100 mA), making them ideal for solid-state circuits.

Overview

The Siemens 3RT2348-1NF30 contactor is an essential component for industrial automation and control systems. Its design prioritizes reliability, ease of integration, and compliance with stringent international standards. Whether used for switching lighting systems, heating elements, or other non-inductive loads, this contactor delivers consistent performance.

Standards Compliance:

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

Protection of Device Connection

Ensuring the longevity and safe operation of the contactor and connected equipment requires proper short-circuit, overload, and overvoltage protection.

• Short-circuit and overload protection of main connections: Refer to the technical product data sheet for specific information regarding free-standing contactors. For device combinations (contactor with overload relay or circuit breaker), consult the Digital and Configuration Manuals for load feeders.
• Short-circuit and overload protection of auxiliary connections: Detailed information can be found in the technical product data sheet.
• Short-circuit and overload protection of control supply voltage: Adherence to relevant standards for control panel configuration and cable dimensioning is crucial. Consider power supplies with current-limiting functions and select appropriate protection devices based on contactor load characteristics (inrush current, switch-on, and holding power).
• Protection against overvoltage at the control supply voltage connection: The integrated varistor in the 3RT2348-1NF30 provides effective damping of opening surges in the coil. For other 3RT23 contactors without integrated damping, RC elements, varistors, or diodes can be retrofitted as accessories. Note: Damping may increase break times and delay times of NO/NC contacts.

Connection Methods:

• Main Circuit: Screw terminals with box terminal, allowing for direct connection to connecting bars with cable lugs when the box terminal is removed.
• Auxiliary and Control Circuit: Reliable screw terminals for secure wiring.

Electromagnetic Compatibility (EMC):

The 3RT2348-1NF30 fulfills the requirements for environment category A, ensuring robust operation in typical industrial settings. When used with frequency converters, refer to the Equipment Manual for specific configuration notes.

Motor Protection:

While primarily designed for AC-1 loads, the 3RT23 series contactors can be combined with 3RU2 thermal overload relays or 3RB3 electronic overload relays for comprehensive motor protection where applicable.

Operating Mechanism:

This contactor features a wide-range solid-state operating mechanism that accommodates universal actuating voltage (83-155 V AC or DC operation). Control is via connections A1 – A2.

Maintenance and Expandability:

• Solenoid Coil Replacement: The solenoid coil of the 3RT2348-1NF30 can be replaced, facilitating maintenance and extending product life.
• Auxiliary Contact Expansion: The basic unit of the 3RT2348-1NF30 includes one NO and one NC integrated auxiliary contact. Further auxiliary switches can be easily added to the basic unit to meet specific application requirements.

Accessories and Spare Parts:

A wide range of accessories and spare parts are available for the SIRIUS 3RT2 contactors, including additional auxiliary switches, surge suppressors, and more. For detailed information, please refer to the accessories overview for SIRIUS 3RT2 contactors and SIRIUS 3RH2 contactor relays.

Application

The Siemens 3RT2348-1NF30 contactor is ideal for:

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

For more information on the Siemens 3RT2348-1NF30 contactor and our full range of industrial control components, please visit turll.com.