Siemens SIRIUS 3RT2327-2AP60 Contactor 4-Pole, AC-1, 50A, 220/240V AC Coil, Spring Terminal, Size S0 Original Brand New

Overview

The Siemens SIRIUS 3RT2327-2AP60 is a high-performance 4-pole contactor designed for robust switching of AC-1 (non-inductive or weakly inductive) loads. With a rated current of 50 A at 400 V and 40 °C, this compact Size S0 contactor is engineered for reliability and efficiency in industrial control applications. Its 220 V AC (50 Hz) / 240 V AC (60 Hz) operating coil, combined with integrated 1 NO + 1 NC auxiliary contacts and convenient spring-loaded terminals, makes it a versatile choice for a wide range of power switching and distribution tasks. Built to comply with international standards like IEC 60947, the 3RT2327-2AP60 ensures safe and dependable operation.

Key Features & Benefit

• High Performance for AC-1 Applications: Specifically designed for switching non-inductive or weakly inductive loads, making it ideal for heating applications, lighting circuits, and resistive loads up to 50 A.
• Space-Saving Design (Size S0): Compact footprint allows for efficient use of panel space, especially in crowded control cabinets.
• Versatile Coil Voltage: Operates reliably with both 220 V AC (50 Hz) and 240 V AC (60 Hz) control supply voltages, offering flexibility in different electrical systems.
• Integrated Auxiliary Contacts: Features 1 Normally Open (NO) and 1 Normally Closed (NC) auxiliary contacts, providing essential feedback and interlocking capabilities without the need for additional modules.
• Spring-Loaded Terminals: Ensures fast, secure, and vibration-resistant wiring connections, reducing installation time and maintenance efforts. Ideal for applications where screw terminals are impractical or subject to vibration.
• Robust & Reliable: Manufactured by Siemens, a global leader in industrial automation, guaranteeing high quality, durability, and long operational life.
• Standards Compliant: Adheres to critical international standards including IEC 60947-1, IEC 60947-4-1, and IEC 60947-5-1, ensuring safety and compatibility.
• Easy Integration: Part of the comprehensive SIRIUS modular system, allowing for seamless integration with other Siemens control devices like overload relays and circuit breakers.

Function

• Four-Pole Switching: Enables the simultaneous switching of four separate electrical circuits, providing comprehensive control over multi-phase or complex single-phase systems.
• Load Disconnection: Efficiently connects or disconnects loads or power generation plants from the electrical grid.
• Transfer Switching: Can be utilized in transfer switching applications for power source selection.
• Control Circuit Integration: The integrated auxiliary contacts facilitate interlocking, status indication, and control circuit logic, enhancing the safety and automation of your system.
• Flexible Protection Options: Designed to integrate seamlessly with Siemens 3RU2 thermal overload relays or 3RB3 electronic overload relays for comprehensive motor protection (though this specific model is primarily for AC-1, it is part of a series that supports such integration).

Protection of Device Connections: It is crucial to protect all connections against overload and short circuits.

• Main Connections: Refer to the technical product data sheet for specific protection information for free-standing contactors. For device combinations (contactor with overload relay or circuit breaker), consult the Digital/Configuration Manual for load feeders.
• Auxiliary Connections: Specific protection details for auxiliary contacts are available in the technical product data sheet.
• Control Supply Voltage: Adhere to relevant standards for control panel configuration. Consider power supplies with current-limiting functions and proper cable dimensioning. For further recommendations, consult the “Control panel tip – Selecting and dimensioning suitable power supplies quickly and reliably.”

Overvoltage Protection (Control Supply): 3RT23 contactors without coil circuits can be retrofitted with external surge suppressors (RC elements, varistors, diodes) to dampen opening surges. Note that damping may increase break and delay times of contacts.

Connection Methods:

• Main Circuit: Spring-loaded terminals for convenient plug-in design.
• Auxiliary and Control Circuit: Screw terminals (standard for this model’s auxiliary and control connections).

Motor Protection: While primarily for AC-1, this contactor series is designed to accommodate Siemens 3RU2 thermal overload relays or 3RB3 electronic overload relays for overload protection if used in motor-driven applications where AC-1 characteristics apply.

Operating Mechanism: This 3RT23 contactor features a conventional AC operating mechanism, controlled via terminals A1-A2.

Auxiliary Contact Expansion: The basic unit includes two integrated auxiliary contacts (1 NO + 1 NC for 3RT232 to 3RT234 contactors). Further expansion with additional auxiliary switches is possible, adhering to permissible configurations.

Accessories and Spare Parts: A wide range of accessories and spare parts are available for 3RT23 contactors, including surge suppressors, additional auxiliary switches, and replacement coils. Refer to the “Accessories and spare parts for SIRIUS 3RT2 contactors and SIRIUS 3RH2 contactor relays” for details.

Application

• Switching of resistive loads, heating elements, and lighting systems (AC-1).
• Main power switching for non-motor loads.
• Grid disconnection and transfer switching in power generation plants.
• Integration into complex control systems requiring reliable 4-pole switching.

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