Siemens 3RT2317-1BF40 Contactor 4-Pole AC-1, 22A, 110V DC, S00 Screw Terminal Original Brand New

Overview

The Siemens 3RT2317-1BF40 is a robust and reliable 4-pole contactor from the SIRIUS 3RT2 series, specifically designed for AC-1 applications. This means it’s perfectly suited for switching weak or non-inductive loads, disconnecting power generation plants from the grid, and transfer switching. With a rated operational current of 22 A at 400 V and 40°C, and a 110 V DC control voltage, it offers efficient and dependable performance in various industrial settings. Its compact S00 size and screw terminals ensure straightforward installation and maintenance.

Key Benefit

• Reliable Performance: Built to IEC standards (IEC 60947-1, IEC 60947-4-1, IEC 60947-5-1), ensuring high quality and safety.
• Versatile Application: Ideal for 4-pole switching of AC-1 loads, power plant disconnection, and transfer switching.
• Space-Saving Design: Compact S00 size allows for efficient panel layout.
• Easy Integration: Screw terminals simplify wiring and connectivity.
• Enhanced Safety: Integrated auxiliary contact in the basic unit (for 3RT231) provides additional control and safety features.
• Overvoltage Protection Ready: Can be easily retrofitted with surge suppressors (RC elements, varistors, diodes) for coil damping, protecting against opening surges.
• High Contact Reliability: Auxiliary contacts are designed for reliable switching even at low voltages and currents (≤ 110 V, ≤ 100 mA).

Detailed Functions & Features

Protection of Device Connections: The Siemens 3RT2317-1BF40 requires appropriate protection for all connections against overload, short circuits, and overvoltage to ensure safe and reliable operation. This includes:

• Main Connections: Refer to the technical product data sheet for specific short-circuit and overload protection details. For combined devices like motor feeders, consult the Digital or standard Configuration Manuals for load feeders.
• Auxiliary Connections: Information on auxiliary contact protection is available in the technical product data sheet.
• Control Supply Voltage Connections: Protection should align with relevant standards for control panel configuration, considering cable dimensioning and load characteristics (inrush current peaks, switch-on/holding power). Suitable power supplies with current-limiting functions or miniature/circuit breakers are recommended.
• Overvoltage Protection: The 3RT23 contactors can be equipped with optional RC elements, varistors, or diodes for damping opening surges in the coil, protecting the control supply voltage connection. Note that damping may increase break and delay times.

Connection Methods: The 3RT231 contactors offer flexible connection options for both main and control circuits:

• Main Circuit: Features screw terminals, allowing for secure and straightforward wiring.
• Auxiliary and Control Circuit: Utilizes screw terminals for reliable connections.

Electromagnetic Compatibility (EMC): The contactor meets the requirements for environment category A, ensuring reliable operation within typical industrial electromagnetic environments. When used with frequency converters, specific configuration notes in the Equipment Manual must be observed.

Contact Reliability of Auxiliary Contacts: For switching low voltages (≤ 110 V) and currents (≤ 100 mA), the integrated auxiliary contacts of the 3RT23 series guarantee high contact reliability, making them suitable for solid-state circuits with currents ≥ 1 mA at 17 V and higher.

Motor Protection Compatibility: While primarily for AC-1 applications, the 3RT2317-1BF40 can be combined with Siemens 3RU2 thermal overload relays or 3RB3 electronic overload relays for comprehensive motor overload protection if used in motor-driven applications (AC-3 with special versions available).

Operating Mechanism: This specific model features a 110 V DC conventional operating mechanism, ensuring precise control via the A1-A2 control supply voltage connection.

Replaceability: The solenoid coil of the 3RT2317-1BF40 is replaceable, extending the lifespan and simplifying maintenance of the unit.

Auxiliary Contact Expansion: The 3RT231 contactor includes one integrated NO auxiliary contact in its basic unit. The unit can be further expanded with additional auxiliary switches, provided the permissible configuration is observed. Refer to the “Auxiliary switches, instantaneous” overview for detailed information on fitting.

Accessories and Spare Parts: A wide range of accessories and spare parts are available for the SIRIUS 3RT2 contactors, including surge suppressors and additional auxiliary switches, ensuring long-term operational flexibility and easy maintenance. Please refer to the “Accessories and spare parts for SIRIUS 3RT2 contactors” documentation for ordering data.

Application

The Siemens 3RT2317-1BF40 contactor is ideally suited for:

• Four-pole switching of weak or non-inductive loads (AC-1): Perfect for applications such as resistive heaters, lighting circuits, or capacitive loads where breaking currents are not significantly higher than the operating current.
• Disconnecting loads or power generation plants from the grid: Provides a reliable means of isolating equipment from the main power supply.
• Transfer switching: Enables the seamless switching between different power sources or loads.

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