Siemens 3RT2326-1AV00 Contactor 4-Pole AC-1, 40A, 400V AC, S0 Size with 1 NO + 1 NC Auxiliary Contact Original Brand New

Siemens 3RT2326-1AV00 Contactor: Robust 4-Pole AC-1 Switching Solution

The Siemens 3RT2326-1AV00 is a high-performance 4-pole contactor from the SIRIUS 3RT2 series, specifically designed for AC-1 applications. This reliable device is ideal for switching resistive and mildly inductive loads, disconnecting power generation plants from the grid, and transfer switching applications. With a rated current of 40A at 400V / 40°C, a 400V AC 50 Hz coil, and integrated 1 NO + 1 NC auxiliary contacts, it offers versatile control and robust performance for your industrial and commercial electrical systems.

Overview

The Siemens 3RT2326-1AV00 contactor is part of the trusted SIRIUS modular system, known for its reliability, ease of integration, and compliance with international standards. This S0 size contactor features convenient screw terminals for secure and straightforward wiring in main, auxiliary, and control circuits. It’s engineered to provide safe and efficient switching of non-inductive or weakly inductive loads, ensuring optimal performance in diverse applications.

Key Benefit

• Reliable AC-1 Switching: Specifically designed for switching resistive loads, heating circuits, and power factor correction capacitors, ensuring stable operation.
• Enhanced Control & Monitoring: Equipped with integrated 1 NO (normally open) and 1 NC (normally closed) auxiliary contacts, providing essential feedback and control options for your system.
• Robust Construction: Built to Siemens’ high-quality standards, ensuring durability and a long operational lifespan even in demanding industrial environments.
• Easy Integration: Part of the modular SIRIUS system, allowing for seamless integration with other Siemens control gear like overload relays and circuit breakers.
• Safety & Compliance: Adheres to critical international standards such as IEC 60947-1, IEC 60947-4-1, and IEC 60947-5-1, guaranteeing safe and compliant operation.
• Flexible Protection Options: Supports various protection measures for short-circuit, overload, and overvoltage, enhancing overall system safety.
• Maintenance Friendly: Features a replaceable solenoid coil, simplifying maintenance and extending the product’s service life.

Function

• Four-pole Switching: Capable of simultaneously switching four poles, making it suitable for multi-phase applications or independent switching of multiple circuits.
• Load Disconnection: Effectively disconnects loads or power generation plants from the electrical grid, providing isolation for maintenance or safety.
• Transfer Switching: Can be utilized in transfer switching applications for switching between different power sources.
• Auxiliary Contact Operation: The 1 NO + 1 NC auxiliary contacts provide essential signaling functions, enabling interlocking, status indication, and control circuit activation.

Standards & Protection

The Siemens 3RT2326-1AV00 contactor is designed and manufactured in accordance with leading international standards, ensuring high levels of safety and performance:

• IEC 60947-1: Low-voltage switchgear and controlgear – General rules.
• IEC 60947-4-1: Low-voltage switchgear and controlgear – Contactors and motor-starters – Electromechanical contactors and motor-starters.
• IEC 60947-5-1: Low-voltage switchgear and controlgear – Control circuit devices and switching elements – Electromechanical control circuit devices.

Protection of Device Connections: All connections must be protected against overload and short circuits.

• Short-circuit and overload protection of main connections: Refer to the technical product data sheet for free-standing contactors. For device combinations (contactor with overload relay or circuit breaker as motor feeder), consult the Digital Configuration Manual for load feeders.
• Short-circuit and overload protection of auxiliary connections: Information available in the technical product data sheet.
• Short-circuit and overload protection of control supply voltage: Consider relevant standards and regulations for control panel configuration. Possible protection includes current-limiting power supplies or suitable miniature/circuit breakers.
• Protection against overvoltage at control supply voltage connection: Can be retrofitted with RC elements, varistors, diodes, or diode assemblies (ordered separately as accessories). Note: Damping increases break, opening, and closing delay times.

Connection Methods

• Main Circuit: Screw terminals (3RT231 and 3RT232 contactors).
• Auxiliary and Control Circuit: Screw terminals.

Electromagnetic Compatibility

The contactor fulfills the requirements for environment category A. When used with frequency converters, observe configuration notes in the Equipment Manual.

Contact Reliability of Auxiliary Contact

For switching voltages $\le 110V$ and currents $\le 100mA$, the auxiliary contacts of 3RT contactors ensure high contact reliability. They are especially suitable for solid-state circuits with currents $\ge 1mA$ at voltages of $17V$ and higher.

Motor Protection

For protection against overload, 3RU2 thermal overload relays or 3RB3 electronic overload relays can be mounted directly onto the 3RT23 contactors.

Operating Mechanism Types

3RT23 contactors are available with conventional AC or DC operating mechanisms, or wide-range solid-state operating mechanisms for universal AC/DC operation. Control is via connections A1-A2.

Replacing Components

• Solenoid Coils: Replaceable.
• Contacts: Only contacts for 3RT233 contactors can be replaced (this specific model is 3RT2326, so contact replacement is not typically supported on this unit’s basic contacts).

Auxiliary Contact Expansion

The basic unit of the 3RT2326-1AV00 includes two integrated auxiliary contacts (1 NO + 1 NC). The unit can be expanded with additional auxiliary switches, adhering to permissible configurations.

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