Siemens SIRIUS 3RT2317-1FF40 4-Pole Contactor for AC-1 Loads, 22A, 110V DC Coil, Screw Terminals (Size S00) Original Brand New

Overview

The Siemens SIRIUS 3RT2317-1FF40 is a high-performance 4-pole contactor designed for reliable switching of non-inductive or weakly inductive loads (AC-1) in industrial applications. This robust contactor is rated for 22A at 400V (at 40 °C ambient temperature) and features a 110V DC operating mechanism with an integrated diode for coil damping, ensuring enhanced reliability and protection. Its compact S00 size and user-friendly screw terminals make it a versatile choice for a wide range of control panel and load feeder configurations.

Key Features & Benefit

• Optimized for AC-1 Loads: Specifically engineered for efficient and safe switching of resistive and non-inductive loads, making it ideal for heating elements, lighting, or isolation applications.
• Integrated Coil Damping: The 110V DC coil includes a built-in diode, which effectively dampens opening surges, protecting the control circuit and extending the coil’s lifespan. This eliminates the need for external surge suppressors in many cases.
• Robust 4-Pole Design: Provides four main contacts for versatile control of multi-phase circuits or simultaneous switching of multiple single-phase circuits.
• Compact S00 Size: Its small footprint allows for efficient use of space within control cabinets, simplifying installation and reducing panel dimensions.
• Reliable Screw Terminals: Ensures secure and straightforward electrical connections, suitable for various wiring methods and environments.
• High Contact Reliability: The auxiliary contacts are designed for high contact reliability, particularly suitable for low voltages (≤ 110V) and currents (≤ 100mA), including solid-state circuits.
• Broad Compliance: Adheres to international standards including IEC 60947-1, IEC 60947-4-1, and IEC 60947-5-1, guaranteeing quality and safety.

Function

• Four-Pole Switching: Capable of switching four separate circuits or a single four-wire circuit simultaneously.
• Load Disconnection: Effectively disconnects resistive or weakly inductive loads from the grid.
• Transfer Switching: Can be utilized in transfer switching applications for various power distribution needs.
• Control Circuit Integration: Designed for seamless integration into control circuits with its 110V DC coil, compatible with various control supply voltage protection schemes.
• Auxiliary Contact Expansion: The basic unit includes integrated auxiliary contacts (1 NO + 1 NC for 3RT232 to 3RT234 models), and can be expanded with additional auxiliary switches for increased signaling and control versatility.

Application

The Siemens 3RT2317-1FF40 contactor is a crucial component for power control in diverse industrial settings. It is ideally suited for:

• Controlling resistive loads in heating, lighting, and power distribution systems.
• Isolating and disconnecting electrical equipment from the main power supply.
• Implementing basic switching functions in machinery and automation systems.
• Applications requiring reliable DC coil operation with built-in surge suppression.

Standards & Protection: The Siemens 3RT2317-1FF40 adheres to stringent international standards, ensuring high levels of safety and performance. Proper protection of device connections against short circuits, overloads, and overvoltage is essential for optimal operation and longevity. Refer to the technical product data sheet and relevant configuration manuals for detailed guidance on implementing suitable protection measures, including considerations for main, auxiliary, and control supply voltage connections. Overvoltage protection for the control supply voltage can be further enhanced by selecting appropriate power supplies or by retrofitting with additional surge suppressors (RC elements, varistors, diodes, or diode assemblies), available as accessories.

Connection Methods: Both the main circuit and the auxiliary/control circuit utilize robust screw terminals for secure and straightforward wiring. This design allows for flexible integration into various electrical systems.

Motor Protection Compatibility: While primarily designed for AC-1 loads, the 3RT23 contactors can be combined with Siemens 3RU2 thermal overload relays or 3RB3 electronic overload relays for comprehensive motor protection when used in relevant applications (e.g., for weak inductive loads where AC-3 characteristics are less critical).

Operating Mechanism & Maintenance: This model features a 110V DC operating mechanism with an integrated diode. For 3RT23 contactors, the solenoid coil is replaceable, contributing to easier maintenance and extended product life.

Accessories & Spare Parts: A wide range of accessories and spare parts are available to enhance the functionality and serviceability of your Siemens SIRIUS 3RT23 contactors. These include additional auxiliary switches, surge suppressors, and various connection components. Please refer to the SIRIUS 3RT2 contactors and SIRIUS 3RH2 contactor relays accessory catalog for comprehensive ordering data.

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