Siemens 3RT2327-1AH20 Contactor, AC-1, 50A, 4-Pole, 48V AC Coil, Screw Terminal, Size S0 Original Brand New

Siemens 3RT2327-1AH20 Contactor – Robust Switching for Non-Inductive Load

The Siemens 3RT2327-1AH20 is a high-performance 4-pole AC-1 contactor from the SIRIUS family, meticulously engineered for reliable switching of non-inductive or weakly inductive loads. With a current rating of 50 A at 400 V / 40 °C, this contactor is a crucial component for a wide range of industrial and commercial applications, including power distribution, load disconnecting, and transfer switching.

Overview

Designed for versatility and durability, the 3RT2327-1AH20 features a 48 V AC (50/60 Hz) coil, ensuring consistent and efficient operation. Its integrated 1 normally open (NO) and 1 normally closed (NC) auxiliary contacts provide essential feedback and control capabilities, while robust screw terminals simplify wiring and ensure secure connections. This Size S0 contactor adheres to stringent international standards, including IEC 60947-1, IEC 60947-4-1, and IEC 60947-5-1, guaranteeing reliability and compliance in diverse operational environments.

Key Features & Function

• AC-1 Application: Specifically designed for switching of four-pole, non-inductive, or weakly inductive loads, such as resistive heaters, furnaces, and lighting systems.
• High Current Rating: Capable of handling up to 50 A at 400 V / 40 °C, providing robust performance for demanding applications.
• 4-Pole Design: Enables the simultaneous switching of four separate circuits, enhancing control and safety.
• 48 V AC Coil: Operates efficiently with a 48 V AC control supply voltage (50/60 Hz).
• Integrated Auxiliary Contacts: Comes with 1 NO (Normally Open) and 1 NC (Normally Closed) auxiliary contacts, crucial for interlocking, signaling, and control circuits. These contacts offer high contact reliability, even for low voltages (≤ 110 V) and currents (≤ 100 mA), making them suitable for solid-state circuits.
• Screw Terminals: Provides secure and straightforward wiring for both main and auxiliary circuits.
• Compact Size S0: Optimized for space-saving integration within control panels.
• Standards Compliance: Fully compliant with IEC 60947-1, IEC 60947-4-1, and IEC 60947-5-1, ensuring global applicability and safety.

Benefit

• Reliable Performance: Built by Siemens, a leader in industrial automation, ensuring long-term reliability and operational stability.
• Enhanced Safety: Provides secure switching for critical loads and offers options for comprehensive short-circuit, overload, and overvoltage protection.
• Versatile Application: Ideal for various non-inductive switching tasks, including disconnecting loads, power generation plant integration, and transfer switching.
• Easy Integration: Compact design and intuitive screw terminals facilitate quick and easy installation into existing or new control systems.
• Expandability: Can be expanded with additional auxiliary switches, offering flexibility for evolving control requirements.
• Durable Construction: Designed for demanding industrial environments, ensuring a long service life.

Protection and Connection Information:

• Main Circuit Protection: Requires suitable short-circuit and overload protection. Refer to the technical product data sheet for free-standing contactors or the Digital/Configuration Manual for load feeders with overload relays/circuit breakers.
• Auxiliary Circuit Protection: Refer to the technical product data sheet for detailed protection guidelines.
• Control Supply Voltage Protection: Consider current-limiting power supplies or suitable protection devices. Observe relevant standards for control panel configuration.
• Overvoltage Protection: The 3RT23 contactors allow for retrofitting of surge suppressors (RC elements, varistors, diodes, diode assemblies) to dampen opening surges in the coil.

Connection Methods:

• Main Circuit (3RT232 Contactor): Screw terminals.
• Auxiliary and Control Circuit: Screw terminals.

Electromagnetic Compatibility (EMC):

• Fulfills requirements for environment category A.
• Note: Observe configuration notes in the Equipment Manual when used with frequency converters.

Motor Protection:

• Compatible with Siemens 3RU2 thermal overload relays and 3RB3 electronic overload relays for robust motor protection.

Operating Mechanism & Maintenance:

• Features a conventional AC operating mechanism.
• Solenoid coil replacement is possible for the 3RT23 contactors, extending product lifespan.

Accessories and Spare Parts:

A range of accessories and spare parts are available to enhance functionality and maintain the contactor. These include:

• Surge suppressors (RC elements, varistors, diodes, diode assemblies)
• Additional auxiliary switches
• Overload relays (3RU2, 3RB3)

For a complete list of accessories and spare parts, please refer to the “Accessories and spare parts for SIRIUS 3RT2 contactors” documentation or visit our website.

Application

The Siemens 3RT2327-1AH20 contactor is ideally suited for:

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

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