Siemens 3RT2336-1AL20 SIRIUS 4-Pole Contactor, AC-1 (60A, 400V), 230V AC Coil, S2 Size Original Brand New

Overview

The Siemens 3RT2336-1AL20 is a high-performance SIRIUS 4-pole contactor, meticulously engineered for switching weak or non-inductive loads (AC-1 applications). As part of the Siemens SIRIUS modular system, this contactor offers exceptional reliability, flexibility, and ease of integration into various industrial control panels and power distribution systems. Its robust design, adherence to international standards like IEC 60947, and comprehensive protection features make it an ideal choice for demanding applications.

Benefit

• Reliable Switching: Designed for AC-1 applications, ensuring stable and safe switching of non-inductive loads, weak inductive loads, or resistive loads.
• Enhanced Safety: Built-in features and recommended protection measures safeguard against short circuits, overloads, and overvoltage, promoting operational safety and equipment longevity.
• Versatile Application: Ideal for disconnecting loads, power generation plants from the grid, and transfer switching scenarios.
• Easy Integration: Compatible with the Siemens SIRIUS modular system, allowing for seamless integration with other Siemens control gear like overload relays and circuit breakers.
• Flexible Connectivity: Equipped with robust screw terminals for secure and straightforward wiring in the main, auxiliary, and control circuits.
• High Contact Reliability: Auxiliary contacts are optimized for low-voltage and low-current applications (≤ 110 V, ≤ 100 mA), ensuring dependable signaling, even in solid-state circuits.
• Durable Design: Engineered for long service life, with the ability to replace solenoid coils for extended operational economy.

Function

• 4-Pole Switching: Provides four independent poles for simultaneously switching multiple phases or circuits in AC-1 applications.
• Load Disconnection: Effectively disconnects resistive or slightly inductive loads, ensuring safety during maintenance or system shutdowns.
• Grid Isolation: Facilitates the isolation of power generation plants from the electrical grid.
• Transfer Switching: Capable of handling transfer switching operations between different power sources.
• Auxiliary Contact Functionality: Includes 1 normally open (NO) and 1 normally closed (NC) auxiliary contacts for feedback, interlocking, and control circuit signaling.
• Coil Operation: Operates with a 230 V AC, 50/60 Hz control supply voltage.

Standards & Protection

The Siemens 3RT2336-1AL20 contactor is built to rigorous international standards, including:

• IEC 60947-1 (General rules)
• IEC 60947-4-1 (Contactors and motor-starters)
• IEC 60947-5-1 (Control circuit devices and switching elements – auxiliary switches)

Protection Measures:

• Short-Circuit and Overload Protection:
  • Main Connections: Requires suitable external protection. Refer to the technical product data sheet for free-standing contactors or the Digital/Configuration Manuals for load feeders (contactor with overload relay/circuit breaker combinations).
  • Auxiliary Connections: Consult the technical product data sheet for specific protection guidelines.
  • Control Supply Voltage: Protection considering cable dimensioning, load characteristics (inrush current, holding power), and potential current-limiting power supplies. Recommendations for miniature or circuit breakers in control circuits are available.
• Overvoltage Protection (Control Supply Voltage): The 3RT23 series allows for retrofitting with optional surge suppressors (RC elements, varistors, diodes) to dampen opening surges in the coil. Note: Damping increases break/delay times.

Connection Methods

• Main Circuit: Screw terminals with box terminal design, allowing direct connection or use with cable lugs (by removing the box terminal).
• Auxiliary and Control Circuit: Reliable screw terminals.

Electromagnetic Compatibility (EMC)

This contactor meets the requirements for environment category A. When used with frequency converters, refer to the Equipment Manual for specific configuration notes.

Contact Reliability of Auxiliary Contacts

For switching low voltages (≤ 110 V) and currents (≤ 100 mA), the integrated auxiliary contacts provide high contact reliability, making them ideal for sensitive solid-state circuits with currents ≥ 1 mA at 17 V and higher.

Motor Protection Compatibility

While primarily for AC-1 loads, the 3RT2336-1AL20 (being a 3RT23 contactor) can be combined with Siemens 3RU2 thermal overload relays or 3RB3 electronic overload relays for applications requiring overload protection.

Operating Mechanism Type

The 3RT2336-1AL20 features a conventional AC operating mechanism, controlled via the A1-A2 terminals with a 230 V AC, 50/60 Hz supply. Refer to the technical product data sheet for detailed operating ranges.

Maintenance & Expansion

• Solenoid Coil Replacement: The solenoid coil of the 3RT2336-1AL20 can be replaced for extended product lifespan.
• Auxiliary Contact Expansion: The basic unit comes with 1 NO + 1 NC integrated auxiliary contacts and can be expanded with additional auxiliary switches. Refer to the “Auxiliary switches, instantaneous” section for permissible configurations.

Accessories & Spare Parts

A wide range of accessories and spare parts are available for the SIRIUS 3RT2 contactor series, including surge suppressors, additional auxiliary switches, and more. For detailed ordering data, please refer to the “Accessories and spare parts for SIRIUS 3RT2 contactors” documentation or contact Turll.

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