Siemens 3RT1373-6AP36 SIRIUS Power Contactor 4-Pole, 400A, AC/DC Coil Original Brand New

Overview

The Siemens 3RT1373-6AP36 is a high-performance SIRIUS power contactor designed for switching weak or non-inductive loads (AC-1) up to 400A at 400V. This robust 4-pole contactor is engineered for reliability and versatility, making it ideal for applications like disconnecting loads, power generation plants, and transfer switching. Featuring a wide-range solid-state operating mechanism, it accepts a universal control voltage of 100-250V AC/DC. The unit comes equipped with 2 normally open (NO) and 2 normally closed (NC) auxiliary contacts and offers flexible connection options via connection rails and screw terminals.

Key Features & Benefit

• High Power Handling: Rated for 400A at 400V (AC-1), suitable for demanding industrial applications.
• Universal Control Voltage: The wide-range solid-state operating mechanism operates on 100-250V AC or DC, simplifying inventory and configuration.
• Enhanced Reliability: Built to IEC 60947 standards, ensuring consistent and safe operation.
• Integrated Protection: Features built-in varistor for coil damping, protecting against overvoltage surges.
• Flexible Connectivity: Supports both connection rails and screw terminals for main circuit connections, accommodating various installation needs.
• Comprehensive Auxiliary Contacts: Includes 2 NO and 2 NC auxiliary contacts for versatile control and signaling integration.
• Contact Reliability: Auxiliary contacts are designed for high contact reliability, even at low voltages and currents (≥ 17V, ≥ 1 mA), making them suitable for solid-state circuits.
• Modularity and Compatibility: Mounts with 3RB2 electronic overload relays for motor protection and is part of the extensive SIRIUS modular system.

Function

• Load Switching (AC-1): Efficiently switches 4-pole weak or non-inductive loads.
• Grid Disconnection: Safely disconnects loads or power generation plants from the electrical grid.
• Transfer Switching: Facilitates the transfer between different power sources.
• Control Integration: Auxiliary contacts enable connection to control circuits for signaling and interlocking.

Standards

• IEC 60947-1
• IEC 60947-4-1
• IEC 60947-5-1 (auxiliary switches)

Connection Methods

• Main Circuit: Screw terminals with connecting bars, allowing for cable lugs or flexible/rigid busbars.
• Auxiliary & Control Circuit: Screw terminals.

Protection and Safety

The Siemens 3RT1373-6AP36 requires external short-circuit and overload protection for all connections. For detailed guidance on protection devices, including the use of miniature circuit breakers and power supplies with current-limiting functions, refer to the provided technical documentation and configuration manuals. The integrated varistor provides protection against overvoltage on the control supply voltage.

Application

The 3RT1373-6AP36 contactor is perfectly suited for use in:

• Industrial machinery
• Power distribution systems
• Building automation
• HVAC systems
• Control panels for non-motor loads

Note: For optimal performance, especially in environments with frequency converters, please consult the equipment manual. While the 3RT13 contactors come with built-in coil damping, this can increase break and delay times.

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