Siemens SIRIUS 3RT1375-6AE36 Power Contactor, 525A, AC-1, 4-Pole, 24-60V AC/DC Coil, S12 Frame Original Brand New

Siemens SIRIUS 3RT1375-6AE36 Power Contactor: High-Performance 525A Switching for Industrial Application

The Siemens SIRIUS 3RT1375-6AE36 is a robust and highly reliable 4-pole power contactor designed for demanding industrial applications. With an AC-1 rating of 525 A at 400 V and 40 °C, this S12 frame contactor is engineered for switching weak or non-inductive loads, disconnecting loads or power generation plants from the grid, and transfer switching. Its versatile wide-range solid-state operating mechanism supports control voltages from 24-60 V AC and 20-60 V DC, offering exceptional flexibility in control circuit design.

Overview

The Siemens 3RT1375-6AE36 belongs to the SIRIUS 3RT13 series, renowned for its performance, durability, and compliance with international standards. This specific model comes equipped with a pre-integrated coil damping (varistor) for enhanced protection against overvoltage, and includes two laterally mounted auxiliary switches (2 NO + 2 NC) for comprehensive control and feedback. Its main circuit connection utilizes robust screw terminals with connecting bars, accommodating both cable lugs and flexible/rigid busbars, ensuring secure and flexible wiring solutions.

Key Benefits

• High Current Capacity: Rated for 525A (AC-1) at 400V, ideal for heavy-duty non-inductive loads.
• Versatile Control Voltage: Wide-range solid-state operating mechanism accepts 24-60V AC and 20-60V DC, simplifying power supply requirements.
• Enhanced Reliability: Integrated varistor for coil damping provides overvoltage protection, extending coil lifespan.
• Comprehensive Auxiliary Contacts: Supplied with 2 NO + 2 NC auxiliary contacts for flexible control and signaling.
• Robust Construction: S12 frame size and durable design ensure long-term performance in industrial environments.
• Flexible Connection Options: Screw terminals with connecting bars support various cable and busbar types for easy installation.
• Standards Compliance: Meets rigorous international standards including IEC 60947-1, IEC 60947-4-1, and IEC 60947-5-1, ensuring safety and compatibility.

Functions & Features

• 4-Pole Switching: Designed for multi-phase or multi-circuit applications involving weak or non-inductive loads.
• AC-1 Category Operation: Optimized for resistive loads, heating, distribution, and non-inductive or slightly inductive loads.
• Wide-Range Solid-State Operating Mechanism: Facilitates control with both AC (50/60 Hz) and DC voltages, offering broad operating ranges (0.85-1.1 x Us max for AC, 0.8-1.1 x Us max for DC).
• Integrated Coil Damping (Varistor): Provides effective suppression of opening surges in the coil, protecting control circuitry.
• Integrated Auxiliary Switches: Comes standard with 2 Normally Open (NO) and 2 Normally Closed (NC) auxiliary contacts for feedback and interlocking.
• Main Circuit Connections: Robust screw terminals with connecting bars are designed for secure connection of cables via lugs or flexible/rigid busbars.
• Auxiliary and Control Circuit Connections: Utilizes reliable screw terminals for easy wiring.
• Electromagnetic Compatibility (EMC): Fulfills requirements for environment category A.
• Contact Reliability: Auxiliary contacts are designed for high reliability, even at low voltages (≤ 110 V) and currents (≤ 100 mA), suitable for solid-state circuits.
• Motor Protection Integration: Compatible with SIRIUS 3RB2 electronic overload relays for comprehensive motor protection (when used with motors).
• Application Versatility: Suitable for four-pole switching of weak or non-inductive loads, disconnecting loads or power generation plants from the grid, and transfer switching.

Protection & Safety

• Short-Circuit and Overload Protection: All connections require appropriate protection. Refer to the technical product data sheet for specific guidance on main connections. For device combinations, consult the Digital or Configuration Manual for load feeders.
• Auxiliary Connection Protection: Information on auxiliary contact protection is available in the technical product data sheet.
• Control Supply Voltage Protection: Consider relevant standards for control panel configuration, cable dimensioning, and suitable power supply selection (e.g., current-limiting functions).
• Overvoltage Protection: The 3RT13 contactors come with integrated varistor-based coil damping.

Connection Methods

• Main Circuit: Screw terminals with connecting bars. Cables can be connected using cable lugs or flexible/rigid busbars. For 3RT136 and 3RT137, broadened bus connectors are an option (accessories).
• Auxiliary and Control Circuit: Screw terminals.

Electromagnetic Compatibility

The contactors meet the requirements for environment category A. For use with frequency converters, specific configuration notes in the Equipment Manual must be observed.

Motor Protection

For overload protection, 3RB2 electronic overload relays can be mounted directly onto 3RT13 contactors.

Application

• Switching resistive heaters in industrial ovens.
• Controlling large lighting systems.
• Disconnecting power generation plants (e.g., solar or wind) from the grid.
• Implementing transfer switching for power sources.
• Managing power distribution in non-motorized industrial loads.

Accessories & Spare Parts

While the operating mechanism and contacts of 3RT13 contactors are not replaceable, a range of accessories is available to enhance functionality. Please refer to the Accessories Ordering Data or the overview graphic in the product documentation for a comprehensive list of mountable accessories.

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