Siemens SIRIUS 3RT2327-1AK60 4-Pole Contactor AC-1, 50A, 110V AC Coil, 1NO+1NC Aux, S0 Original Brand New

Siemens SIRIUS 3RT2327-1AK60 4-Pole Contactor: Robust AC-1 Switching for Non-Inductive Loads

The Siemens SIRIUS 3RT2327-1AK60 is a high-performance 4-pole contactor meticulously engineered for switching non-inductive or weakly inductive loads (AC-1 applications). With a robust 50A rating at 400V and a compact S0 size, this contactor is an ideal choice for diverse industrial and commercial power control systems, including load disconnection and power generation plant integration.

Overview

The 3RT2327-1AK60 is part of the renowned Siemens SIRIUS modular system, designed for reliability and ease of integration. It features a 110V AC (50 Hz) / 120V AC (60 Hz) coil for versatile control voltage applications. Equipped with one normally open (1 NO) and one normally closed (1 NC) auxiliary contact, it provides essential feedback and interlocking capabilities for your control circuits. Its secure screw terminals ensure straightforward and reliable wiring.

Key Benefit

• Reliable AC-1 Switching: Specifically designed for efficient and safe switching of non-inductive or weakly inductive loads, ensuring stable operation.
• Versatile Application: Ideal for general load switching, disconnecting loads, and integrating power generation plants into the grid.
• Enhanced Control: Integrated 1 NO + 1 NC auxiliary contacts provide crucial signaling and control interlocking.
• Robust Construction: Built to Siemens’ high-quality standards, ensuring long-term durability and consistent performance in demanding environments.
• Easy Installation: Screw terminals offer a secure and simple connection method for main and control circuits.
• Compact Design (Size S0): Optimizes panel space, making it suitable for installations with limited room.
• Global Compliance: Adheres to international standards such as IEC 60947-1, IEC 60947-4-1, and IEC 60947-5-1, guaranteeing safety and compatibility.

Function

• 4-Pole Switching: Enables simultaneous control of four independent circuits or multi-phase loads.
• AC-1 Application: Optimized for resistive and non-inductive loads where the current is primarily resistive.
• Coil Control: Activated by a 110V AC (50 Hz) or 120V AC (60 Hz) control supply voltage.
• Auxiliary Contacts: Provides 1 NO (Normally Open) and 1 NC (Normally Closed) contact for status indication, interlocking, and control circuit integration.
• Short-Circuit and Overload Protection Readiness: Designed for integration with external protection devices like miniature circuit breakers or fuses for main, auxiliary, and control circuits.
• Electromagnetic Compatibility (EMC): Fulfills requirements for environment category A, minimizing interference with other electronic devices.

Overview of Standards and Protection

• Standards Compliance: IEC 60947-1, IEC 60947-4-1, IEC 60947-5-1 (for auxiliary switches).
• Device Connection Protection: All connections require appropriate short-circuit and overload protection. Refer to the technical product data sheet for specific guidance on free-standing contactors and device combinations (e.g., with overload relays or circuit breakers).
• Auxiliary Connection Protection: Detailed information regarding auxiliary contact protection can be found in the technical product data sheet.
• Control Supply Voltage Protection: Consider relevant standards for control panel configuration. Suitable power supplies with current-limiting functions are recommended, along with appropriate protection devices (e.g., miniature circuit breakers).
• Overvoltage Protection: 3RT23 contactors can be retrofitted with surge suppressors (RC elements, varistors, diodes) for damping opening surges in the coil, available as separate accessories.

Connection Methods:

• Main Circuit (3RT232): Features reliable screw terminals.
• Auxiliary and Control Circuit: Utilizes screw terminals for secure connections.

Contact Reliability of Auxiliary Contacts: For switching voltages $\le$ 110 V and currents $\le$ 100 mA, the auxiliary contacts of 3RT contactors guarantee high contact reliability, making them ideal for solid-state circuits with currents $\ge$ 1 mA at 17 V and higher.

Motor Protection (with additional devices): For overload protection, the 3RT23 contactors can be combined with 3RU2 thermal overload relays or 3RB3 electronic overload relays (sold separately).

Operating Mechanism: The 3RT2327-1AK60 is equipped with a conventional AC operating mechanism, controlled via the A1-A2 terminals with specific operating ranges (refer to the technical product data sheet for details).

Maintenance: The solenoid coil on the 3RT23 contactors is replaceable, ensuring extended product lifespan and ease of maintenance.

Auxiliary Contact Expansion: The basic unit includes integrated auxiliary contacts (1 NO + 1 NC). It can be further expanded with additional auxiliary switches (sold separately), adhering to permissible configurations.

Accessories and Spare Parts: A wide range of accessories and spare parts are available for 3RT23 contactors to enhance functionality and ensure long-term operation. Please refer to the Siemens SIRIUS catalog for detailed ordering data.

Application

The Siemens 3RT2327-1AK60 contactor is ideally suited for:

• Four-pole switching of weak or non-inductive loads (AC-1).
• Disconnecting various loads or power generation plants from the electrical grid.
• Transfer switching applications.

For motor-driven loads (AC-3), special versions of 3RT23 contactors are also available.

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