Siemens 3RT1375-6AF36 Contactor 525A, 4-Pole, AC-1, 48-130V AC/DC Control, S12 Frame Original Brand New

Siemens 3RT1375-6AF36 Contactor: High-Performance 4-Pole Switching for Industrial Application

Overview

The Siemens 3RT1375-6AF36 is a robust and reliable 4-pole contactor from the SIRIUS 3RT13 series, specifically designed for switching non-inductive or weakly inductive loads (AC-1). With a high current rating of 525 A at 400 V and 40 °C, and a versatile control supply voltage range of 48-130 V AC/DC, this S12 frame contactor is an ideal solution for demanding industrial power control applications. It comes equipped with 2 normally open (NO) and 2 normally closed (NC) auxiliary contacts, offering flexible integration into various control circuits. Featuring connection rail and screw terminals, the 3RT1375-6AF36 ensures secure and straightforward wiring. Built to stringent international standards, including IEC 60947, this contactor provides exceptional performance and durability.

Key Features & Benefit

• High Current Capacity (AC-1): Rated at 525 A at 400 V, making it suitable for heavy-duty non-inductive load switching applications.
• Versatile 4-Pole Design: Enables the switching of four separate circuits simultaneously, perfect for multi-phase systems, disconnecting loads, or power generation plants from the grid.
• Wide Control Voltage Range (48-130 V AC/DC): Offers flexibility and simplifies stock management, as it can be controlled by a broad spectrum of AC or DC voltages.
• Integrated Coil Damping (Varistor): Enhances the lifespan of the contactor by suppressing opening surges in the coil, reducing wear and tear on the control circuit components.
• Robust Connection Options: Equipped with connecting bars for screw terminals, accommodating cable lugs or flexible/rigid busbars, ensuring secure and reliable power connections.
• Pre-fitted Auxiliary Switches (2 NO + 2 NC): Provides immediate control circuit integration and monitoring capabilities.
• Compliance with International Standards: Manufactured to IEC 60947-1, IEC 60947-4-1, and IEC 60947-5-1, guaranteeing safety, reliability, and global compatibility.
• Durable S12 Frame Size: Built for demanding industrial environments, ensuring long-term operational stability.

Function

• Four-pole switching of weak or non-inductive loads (AC-1): Efficiently controls heating elements, lighting systems, capacitor banks, and other resistive loads.
• Disconnecting loads or power generation plants from the grid: Provides a reliable means to isolate electrical systems for maintenance or emergency.
• Transfer switching: Facilitates the seamless transfer between different power sources.
• Integration into Motor Protection Systems: Can be combined with 3RB2 electronic overload relays for comprehensive motor protection (overload protection).
• Control Circuit Integration: Auxiliary contacts enable interlocking, signaling, and control functions within automation systems.

Protection and Safety:

• Short-circuit and overload protection of main connections: Requires external suitable measures. Refer to the technical product data sheet or configuration manuals for device combinations.
• Short-circuit and overload protection of auxiliary connections: Consult the technical product data sheet for specific information.
• Short-circuit and overload protection of control supply voltage: Adhere to relevant standards for control panel configuration. Consider power supplies with current-limiting functions and suitable protection devices like miniature or circuit breakers.
• Protection against overvoltage at control supply voltage connection: The 3RT13 contactors come with integrated coil damping (varistor). Note that damping increases break times and opening/closing delays of contacts.

Connection Methods:

• Main Circuit: Screw terminals with connecting bars, allowing connections via cable lugs or flexible/rigid busbars. Can also be fitted with broadened bus connectors (see accessories).
• Auxiliary and Control Circuit: Reliable screw terminals.

Compatibility and Accessories:

• Motor Protection: Compatible with 3RB2 electronic overload relays for robust motor overload protection.
• Auxiliary Switches: Supplied with two laterally mounted auxiliary switches.
• Accessories and Spare Parts: Refer to the overview graphic or “Accessories ordering data” for compatible components.

Application

• Switching of heating systems in industrial furnaces.
• Controlling lighting circuits in large commercial buildings.
• Isolation switches for power distribution units.
• Transfer switches in emergency power supply systems.
• Controlling non-motor loads in automation and process control.

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