Siemens 3RT2317-1BG40 Contactor 4-Pole, AC-1, 22A, 125V DC, Screw Terminal, S00 Original Brand New

Siemens 3RT2317-1BG40 Contactor – Reliable 4-Pole Switching for AC-1 Application

The Siemens 3RT2317-1BG40 is a high-performance 4-pole contactor from the SIRIUS series, specifically designed for AC-1 applications. With a rated current of 22A at 400V/40°C, this compact S00 size contactor is ideal for switching weak or non-inductive loads. Featuring robust screw terminals for secure connections and a 125V DC operating mechanism, the 3RT2317-1BG40 ensures reliable and efficient operation in various industrial and power distribution settings.

Overview

The Siemens 3RT2317-1BG40 contactor is part of the SIRIUS modular system, known for its versatility and adherence to global standards. This 4-pole AC-1 contactor is engineered for applications requiring the switching of resistive or slightly inductive loads, offering exceptional performance and durability. Its compact S00 size makes it suitable for space-constrained control panels, while the 125V DC coil ensures compatibility with common DC control circuits.

Standard

This contactor fully complies with international safety and performance standards, including:

• IEC 60947-1: General rules for low-voltage switchgear and controlgear.
• IEC 60947-4-1: Contactors and motor-starters – Electromechanical contactors and motor-starters.
• IEC 60947-5-1: Control circuit devices and switching elements – Electromechanical control circuit devices (for auxiliary switches).

Protection of Device Connections:

Ensuring the longevity and safety of your electrical system, the 3RT2317-1BG40 requires proper protection against short circuits, overload, and overvoltage.

• Short-circuit and Overload Protection of Main Connections: Refer to the technical product data sheet for specific recommendations for free-standing contactors. For device combinations (e.g., contactor with overload relay or circuit breaker as a motor feeder), consult the Digital and Configuration Manuals for load feeders.
• Short-circuit and Overload Protection of Auxiliary Connections: Detailed information on auxiliary contact protection can be found in the technical product data sheet.
• Short-circuit and Overload Protection of Control Supply Voltage: Adhere to relevant standards and regulations for control panel configuration, including cable dimensioning. Consider power supplies with current-limiting functions and suitable protection devices, taking into account the contactor’s load characteristics (inrush current, switch-on power, holding power). Recommendations for miniature or circuit breakers in control circuits are available in the “Control panel tip – Selecting and dimensioning suitable power supplies quickly and reliably” guide.
• Protection against Overvoltage at the Control Supply Voltage Connection: The 3RT23 contactors (when supplied without a coil circuit) can be retrofitted with surge suppressors such as RC elements, varistors, diodes, or diode assemblies (ordered separately) to dampen opening surges in the coil. Note that damping may increase break times and delay times of NO/NC contacts. Consult the Equipment Manual for detailed information on how damping influences time response.

Connection Methods:

The Siemens 3RT2317-1BG40 utilizes robust and reliable connection methods:

• Main Circuit: Features screw terminals, ensuring secure and durable connections for the main power lines.
• Auxiliary and Control Circuit: Equipped with reliable screw terminals for easy and straightforward wiring of control and auxiliary circuits.

Electromagnetic Compatibility (EMC):

The 3RT2317-1BG40 contactor meets the requirements for environment category A, ensuring its reliable operation in typical industrial environments. For applications involving frequency converters, it is crucial to observe the configuration notes provided in the Equipment Manual to maintain optimal performance and EMC compliance.

Contact Reliability of Auxiliary Contacts:

For switching low voltages (≤ 110 V) and currents (≤ 100 mA), the integrated auxiliary contacts of the 3RT23 contactors offer a high level of contact reliability. These contacts are especially suitable for solid-state circuits with currents ≥ 1 mA at a voltage of 17 V and higher, ensuring precise and dependable control signals.

Motor Protection

While the 3RT2317-1BG40 is an AC-1 contactor, it can be seamlessly integrated into motor control systems for overload protection:

• For 3RT23 Contactors: Siemens 3RU2 thermal overload relays or 3RB3 electronic overload relays can be directly mounted to the 3RT23 contactors, providing comprehensive overload protection for motors.

Operating Mechanism Type:

The 3RT2317-1BG40 features a conventional DC operating mechanism for reliable coil actuation. Control is managed via the control supply voltage connection A1-A2, with specific operating ranges detailed in the technical product data sheet.

Replacing Solenoid Coils, Operating Mechanisms, or Spare Contacts:

For the 3RT2317-1BG40 (part of the 3RT23 contactor series), solenoid coil replacement is possible, extending the lifespan and serviceability of the unit. For 3RT233 contactors, contacts can also be replaced.

Fitting Auxiliary Contacts and Mounting Additional Auxiliary Switches:

• Equipment as Supplied: The 3RT231 contactors, including the 3RT2317-1BG40, come with one integrated auxiliary contact in the basic unit.
• Expansion Possibilities: All 3RT23 basic units can be expanded with additional auxiliary switches, provided the permissible configuration is observed. Detailed information on fitting auxiliary switches for 3RT23 contactors can be found in the “Auxiliary switches, instantaneous → Overview” section.

Accessories and Spare Parts:

A wide range of accessories and spare parts are available for 3RT231 to 3RT234 contactors, ensuring expandability and ease of maintenance. Refer to the “Accessories and spare parts for SIRIUS 3RT2 contactors and SIRIUS 3RH2 contactor relays” for a complete list.

Application

The Siemens 3RT2317-1BG40 contactor is ideally suited for a variety of applications, including:

• Four-pole switching of weak or non-inductive loads (AC-1): Perfect for resistive heating, lighting, and general power distribution.
• Disconnecting loads or power generation plants from the grid: Provides a reliable means of isolation for safety and maintenance.
• Transfer switching: Can be used in systems requiring switching between different power sources.

For specialized applications involving switching motor-driven loads (AC-3), Siemens offers dedicated versions of the 3RT23 contactors.

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