Siemens air circuit breakers, especially the SENTRON 3WA series, are advanced solutions for power distribution in industrial and infrastructure applications. These circuit breakers are essential for maintaining the reliability and safety of electrical systems, particularly as automation and strict regulatory standards become more prominent.

The SENTRON 3WA air circuit breakers are known for their fail-safe performance in complex environments, ensuring continuous power and protecting against overloads, short circuits, and other potential faults. They are engineered to be flexible and adaptable, allowing for integration into diverse system setups. With intuitive features and straightforward customization options, the SENTRON 3WA breakers simplify installation and operation, making it easier for engineers and facility managers to achieve their power management goals.

SENTRON 3WA

Siemens’ SENTRON 3WA air circuit breakers are designed to meet the growing demands of modern power distribution, providing safety and reliability in increasingly automated environments. As power distribution systems need to comply with stricter standards, the SENTRON 3WA offers a solution that is not only robust but also flexible, allowing for easy customization to suit different infrastructure needs.

This breaker line is engineered to ensure fail-safe operation, helping manufacturers and operators achieve optimal results while maintaining system integrity. With SENTRON 3WA, Siemens aims to simplify complex power distribution challenges, making it easier for users to meet their specific objectives.

3WA1120-3AB32-0AA0

The Siemens 3WA1120-3AB32-0AA0 is a withdrawable circuit breaker with a guide frame designed for versatile and efficient circuit protection in industrial settings. Built in compliance with IEC 60947-2, this breaker is tailored for applications requiring enhanced flexibility, reliability, and safety.

Key Features and Specifications:

• Number: 3WA1120-3AB32-0AA0
• Type: Withdrawable circuit breaker with guide frame.
• Frame Size: 1.
• Poles: 3-pole configuration.
• Rated Current (In): 2000 A.
• Voltage Rating: Up to 690 V AC, 50/60 Hz.

Breaking Capacity (Icu):

• 66 kA at 500 V.
• 50 kA at 690 V.

Features and Functionalities

Trip Unit:

• ETU300 LSI Trip Unit, optimized for standard applications.

Protection includes:

• LT (Long Time).
• ST (Short Time).
• INST (Instantaneous).
• Requires an external N-sensor for N-protection.

Withdrawable Design:

• Includes a guide frame with shutter, enhancing operational safety and flexibility.
• Excludes position signaling switch for the withdrawable mechanism.

Connections:

• Features rear horizontal connection for streamlined installation.

Manual Operating Mechanism:

• Equipped with a mechanical manual closing mechanism.

Excludes:

• Spring charging motor.
• Closing coil (CC).
• Remote trip alarm reset coil (RR).
• Shunt trips.

Auxiliary Switches:

• Comes with 2NO + 2NC auxiliary switches for additional monitoring and control.

Signaling and Communication:

• Includes a trip alarm switch (1xCO) to signal faults.
• No integrated communication or metering functionality.

Additional Features:

• Includes a ready-to-close signal switch for operational readiness.
• Additional Product Information

Product Family:

• Belongs to the 3WA1 Air Circuit Breakers series, supporting currents up to 6300 A (AC), adhering to IEC standards.
• Product Lifecycle: Active (PLM Code: PM300).
• Commodity Code: 85362090.
• Catalog ID: LV10.
• Group Code: P360.

Applications

The 3WA1120-3AB32-0AA0 is ideal for:

• High-current industrial applications requiring a withdrawable circuit breaker for easy maintenance and replacement.
• Scenarios where reliable circuit protection with adjustable trip characteristics is necessary.
• Environments prioritizing safety, with features like a guide frame and shutter mechanism.

This breaker ensures superior performance and flexibility, making it an excellent choice for demanding power distribution systems.