Siemens 3RT1373-6AR36 SIRIUS Power Contactor AC-1, 4-Pole, 400A, 250-500V AC/DC Original Brand New

Overview

The Siemens 3RT1373-6AR36 is a robust and highly reliable SIRIUS Power Contactor, specifically designed for switching non-inductive or weakly inductive loads in AC-1 applications. This 4-pole contactor boasts a substantial 400A current rating at 400V and 40°C, making it suitable for demanding industrial environments. Part of the S12 frame size, it features a versatile wide-range solid-state operating mechanism that accepts both AC and DC control voltages from 250V to 500V. Equipped with 2 normally open (NO) and 2 normally closed (NC) auxiliary contacts, and offering flexible connection options via connection rail or screw terminals, the 3RT1373-6AR36 provides exceptional performance and ease of integration for critical power control applications.

Function

• Four-Pole Switching (AC-1): Designed to safely and efficiently switch weak or non-inductive loads.
• Load Disconnection: Ideal for disconnecting loads or power generation plants from the electrical grid.
• Transfer Switching: Capable of facilitating transfer switching operations in various power distribution setups.
• Control Circuit Integration: Features 2 NO + 2 NC auxiliary contacts for seamless integration into control circuits and signaling.
• Wide Voltage Control: Operates reliably with a broad control supply voltage range of 250-500V AC/DC.
• Coil Damping: Integrated varistor for damping opening surges, enhancing coil longevity and system stability.

Benefit

• High Current Capacity: Handles significant loads with a 400A rating, ensuring reliable operation in high-power applications.
• Versatile Power Supply: Wide operating voltage range (250-500V AC/DC) simplifies inventory and offers flexible control options.
• Enhanced Reliability: Built-in coil damping (varistor) protects against overvoltage, contributing to longer service life.
• Standard Compliant: Meets rigorous international standards including IEC 60947-1, IEC 60947-4-1, and IEC 60947-5-1 (auxiliary switches), ensuring safety and quality.
• Flexible Connection: Offers both connection rail and screw terminals for adaptable installation methods.
• Integrated Auxiliary Contacts: Provides essential feedback and control points for complex systems.
• Robust Design: Engineered for harsh industrial environments, ensuring consistent performance.
• Easy Integration: Compatible with 3RB2 electronic overload relays for comprehensive motor protection.

Protection & Safety

The Siemens 3RT1373-6AR36 requires appropriate external protection for all connections to ensure optimal operation and safety.

• Main Connections: Refer to the technical product data sheet for specific short-circuit and overload protection details for free-standing contactors. For device combinations (e.g., with overload relays or circuit breakers as motor feeders), consult the Digital Configuration Manual for load feeders or the Configuration Manual for load feeders.
• Auxiliary Connections: Short-circuit and overload protection information for auxiliary contacts can be found in the technical product data sheet.
• Control Supply Voltage: Adhere to relevant standards for control panel configuration and components (e.g., cable dimensioning). Consider using a suitable power supply with current-limiting functions and select appropriate protection devices based on contactor load characteristics (inrush current, switch-on, holding power).
• Overvoltage Protection: The 3RT13 contactors come equipped with integrated coil damping (varistor) for protection against opening surges. Note that damping may slightly increase break times and delay times of contacts.

Connection Methods:

• Main Circuit: Utilizes screw terminals with connecting bars, allowing for cable connections using cable lugs or flexible/rigid busbars. For larger applications, 3RT136 and 3RT137 contactors can be fitted with broadened bus connectors (accessories available).
• Auxiliary and Control Circuit: Features reliable screw terminals for secure wiring.

Electromagnetic Compatibility (EMC): The 3RT1373-6AR36 fulfills the requirements for environment category A, ensuring stable operation in typical industrial settings. When used with frequency converters, specific configuration notes in the Equipment Manual must be observed.

Contact Reliability: The auxiliary contacts of 3RT13 contactors offer high contact reliability, particularly suitable for switching voltages $\le 110\text{ V}$ and currents $\le 100\text{ mA}$. They are also ideal for solid-state circuits with currents $\ge 1\text{ mA}$ at voltages of $17\text{ V}$ and higher.

Motor Protection: For comprehensive motor overload protection, the Siemens 3RT1373-6AR36 can be easily combined with Siemens 3RB2 electronic overload relays, which can be directly mounted onto the contactor.

Operating Mechanism: This contactor features a sophisticated wide-range solid-state operating mechanism, allowing for flexible control with both $50/60\text{ Hz AC}$ and DC voltages. The operating range is 0.8×Us,min​ to 1.1×Us,max​ for DC control and 0.85×Us,min​ to 1.1×Us,max​ for AC control.

Maintenance & Expansion:

• Operating Mechanism/Contacts: For the 3RT13 series, it is not possible to change the operating mechanism or contacts.
• Auxiliary Switches: The 3RT1373-6AR36 is supplied with two laterally mounted auxiliary switches. The basic unit can be further expanded with additional auxiliary switches, adhering to permissible configurations.

Application

The Siemens 3RT1373-6AR36 contactor is perfectly suited for a variety of industrial and commercial applications requiring robust switching of non-inductive loads, including:

• Switching resistive loads (e.g., heating elements, lighting)
• Controlling large capacitor banks
• Isolating and connecting power generation units
• Implementing automatic transfer switch (ATS) functions
• General power distribution and control systems in factories, buildings, and infrastructure.

For more information on our complete range of industrial control products, please visit Turll.