Siemens SIRIUS 3RT2336-1NB30-4AA0 Power Contactor 51A, 22kW, 4-Pole, AC/DC Coil, S2 Size with Varistor Original Brand New

Siemens SIRIUS 3RT2336-1NB30-4AA0 Power Contactor

The Siemens SIRIUS 3RT2336-1NB30-4AA0 is a high-performance 4-pole power contactor engineered for reliable switching of motor-driven loads (AC-3) and non-inductive loads (AC-1). Part of the renowned SIRIUS 3RT23 series, this S2 size contactor is designed for robust industrial applications, offering exceptional durability and compliance with international standards.

Overview

The Siemens 3RT2336-1NB30-4AA0 power contactor is a crucial component for efficient and safe control in industrial automation. Its robust design and versatile control voltage range make it suitable for a wide array of applications, including disconnecting loads, power generation plants from the grid, and transfer switching. The integrated varistor provides crucial overvoltage protection for the control coil, enhancing the lifespan and reliability of the device.

Benefit

• High Performance: Capable of handling significant current and power for demanding motor and resistive loads.
• Versatile Control: Wide-range AC/DC control voltage allows for flexible integration into various control systems.
• Enhanced Reliability: Integrated varistor protects the coil from damaging voltage surges, extending product longevity.
• Space-Saving Design: Compact S2 size optimizes panel space.
• Easy Integration: Standardized auxiliary contacts and screw terminals facilitate straightforward wiring and connection.
• Comprehensive Protection Options: Designed to integrate seamlessly with Siemens SIRIUS overload relays (3RU2 thermal, 3RB3 electronic) for complete motor protection.
• Compliance: Adheres to rigorous international standards (IEC 60947), ensuring safety and quality.

Function

• Power Switching: Efficiently makes and breaks electrical circuits for motors and other loads.
• Motor Control: Specifically designed for AC-3 applications, enabling precise control of motor operations.
• Load Isolation: Provides a safe means of isolating equipment from the main power supply.
• Auxiliary Signaling: Integrated NO/NC auxiliary contacts provide feedback on contactor status to control systems.
• Surge Suppression: Built-in varistor protects the control coil from transient overvoltages, ensuring stable operation.

Standards Compliance:

This Siemens power contactor conforms to the following international standards, ensuring high quality and safety:

• IEC 60947-1
• IEC 60947-4-1
• IEC 60947-5-1 (for auxiliary switches)

Protection of Device Connections:

All connections to the Siemens 3RT2336-1NB30-4AA0 must be adequately protected against overload and short circuits.

• Main Connections: For standalone contactor protection, refer to the technical product data sheet. For combinations with overload relays or circuit breakers, consult the Digital or standard Configuration Manual for load feeders.
• Auxiliary Connections: Protection details for auxiliary contacts are available in the technical product data sheet.
• Control Supply Voltage Connections: Protection should align with relevant control panel standards. Options include current-limiting power supplies or suitable miniature/circuit breakers, considering the contactor’s load characteristics (inrush current, holding power).

Protection against Overvoltage at Control Supply Voltage Connection:

The 3RT2336-1NB30-4AA0 comes with an integrated varistor for coil damping. For 3RT23 contactors without integrated damping, external RC elements, varistors, diodes, or diode assemblies can be added as accessories. Note that damping may slightly increase break times and delay times of contacts.

Connection Methods:

• Main Circuit: Screw terminals with a box terminal for robust connections. Direct connection with cable lugs is possible when the box terminal is removed.
• Auxiliary and Control Circuit: Reliable screw terminals for secure wiring.

Electromagnetic Compatibility (EMC):

The contactor fulfills requirements for environment category A. When used with frequency converters, specific configuration notes in the Equipment Manual must be observed.

Contact Reliability of Auxiliary Contacts:

The auxiliary contacts of the 3RT23 series ensure high contact reliability, especially suitable for switching low voltages (≤ 110 V) and currents (≤ 100 mA), as well as solid-state circuits with currents ≥ 1 mA at 17 V and higher.

Motor Protection Compatibility:

For comprehensive motor overload protection, the Siemens 3RT2336-1NB30-4AA0 can be seamlessly combined with:

• 3RU2 Thermal Overload Relays
• 3RB3 Electronic Overload Relays

Operating Mechanism:

This contactor features a wide-range solid-state operating mechanism that can be controlled with a universal actuating voltage of 20-33 V AC/DC (50/60 Hz). Control is applied via terminals A1 – A2.

Maintenance & Expansion:

• Solenoid Coil: Replacement of the solenoid coil is possible.
• Auxiliary Contacts: The basic unit integrates two auxiliary contacts (1 NO + 1 NC). All basic units can be expanded with additional auxiliary switches, adhering to permissible configurations.
• Accessories & Spare Parts: A wide range of accessories and spare parts are available for the SIRIUS 3RT2 contactors to meet various application requirements.

Application

The Siemens 3RT2336-1NB30-4AA0 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
• Switching motor-driven loads (AC-3)

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