Siemens SIRIUS 3RT1374-6AE36 Power Contactor, 4-Pole, AC-1, 500A/400V, Wide Range Coil Original Brand New

Siemens SIRIUS 3RT1374-6AE36 Power Contactor

The Siemens SIRIUS 3RT1374-6AE36 is a high-performance 4-pole power contactor engineered for reliable switching of weak or non-inductive loads (AC-1 applications). With a robust current rating of 500A at 400V and a 40°C ambient temperature, this S12 size contactor is ideal for demanding industrial environments. Its innovative wide-range solid-state operating mechanism supports both AC (24-60V) and DC (20-60V) control voltages, offering exceptional versatility and simplified inventory. Equipped with 2 normally open (NO) and 2 normally closed (NC) auxiliary contacts, the 3RT1374-6AE36 ensures comprehensive control and feedback capabilities. Connection is made easy and secure via connection rails and screw terminals.

Overview

The Siemens SIRIUS 3RT13 contactor series stands for proven quality and reliability in power switching. The 3RT1374-6AE36 is a testament to this, designed to meet rigorous international standards and provide robust performance in a variety of applications. It’s a critical component for controlling large non-inductive loads, facilitating grid disconnection, and enabling efficient transfer switching in industrial and commercial systems.

Key Features & Benefit

• High Power Rating: Handles up to 500A at 400V (AC-1), suitable for substantial non-inductive loads.
• Versatile 4-Pole Design: Ideal for multi-phase switching of loads or power generation plants.
• Wide-Range Solid-State Operating Mechanism: Flexible control with 24-60V AC and 20-60V DC, reducing the need for multiple coil variants.
• Integrated Coil Damping: Equipped with a varistor for surge suppression, enhancing coil longevity and system reliability.
• Comprehensive Auxiliary Contacts: Features 2 NO + 2 NC contacts for versatile control circuitry and status indication.
• Robust Connection: Secure and reliable connection via connecting rails and screw terminals, accommodating cable lugs or flexible/rigid busbars.
• Standards Compliance: Manufactured and tested according to IEC 60947-1, IEC 60947-4-1, and IEC 60947-5-1 (auxiliary switches), ensuring global applicability and safety.
• High Contact Reliability: Auxiliary contacts designed for reliable switching even at low voltages and currents (≤ 110V, ≤ 100mA).
• Electromagnetic Compatibility (EMC): Fulfills requirements for environment category A, ensuring stable operation in industrial settings.

Function

• AC-1 Switching: Primarily designed for switching weak or non-inductive loads.
• Load Disconnection: Facilitates safe disconnection of loads or power generation plants from the electrical grid.
• Transfer Switching: Enables seamless transfer between different power sources or load configurations.
• Control Integration: Auxiliary contacts provide essential feedback and control points for automated systems.
• Overvoltage Protection: Built-in varistor damping protects the coil from harmful voltage surges.

Protection of Connections:

All connections (main, auxiliary, and control supply voltage) must be protected against overload and short circuits using appropriate measures. Refer to the technical product data sheet for specific guidance on free-standing contactors. For device combinations (e.g., contactor with overload relay or circuit breaker), consult the Digital Configuration Manual for Load Feeders. Protection for auxiliary contacts is detailed in the technical product data sheet. For control supply voltage, consider relevant standards, cable dimensioning, and the use of current-limiting power supplies or suitable protection devices like miniature circuit breakers.

Compatibility & Accessories:

• Motor Protection: For overload protection, the 3RT1374-6AE36 can be effectively combined with 3RB2 electronic overload relays.
• Auxiliary Switches: This contactor is supplied with two laterally mounted auxiliary switches. While the operating mechanism and main contacts are not field-replaceable on 3RT13 contactors, compatible accessories and spare parts can be found in the accessories ordering data.
• Bus Connectors: 3RT136 and 3RT137 contactors can be fitted with broadened bus connectors (refer to overview graphic or accessories ordering data).

Application

The Siemens 3RT1374-6AE36 contactor is perfectly suited for a wide range of industrial applications, including:

• Switching resistive loads in heating systems
• Controlling lighting circuits
• Managing capacitor banks for power factor correction
• Isolating power supplies in large installations
• Transferring loads in standby power systems
• Any application requiring reliable switching of non-inductive AC loads.

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