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.

3WA1110-3AB42-0AA0

The Siemens 3WA1110-3AB42-0AA0 is a robust withdrawable circuit breaker equipped with a guide frame, designed to meet IEC 60947-2 standards. This model provides essential protection for medium-voltage systems in industrial settings, where reliability and ease of maintenance are key. Part of Siemens’ 3WA1 Air Circuit Breakers family, this breaker is suitable for applications requiring high breaking capacity and durable protection.

Key Features and Specifications:

• Number: 3WA1110-3AB42-0AA0
• Mounting Type: Withdrawable with guide frame for ease of service
• Frame Size: 1
• Poles: 4-pole, with N-pole on the left
• Rated Current (In): 1000 A
• Voltage Rating: Up to 690 V AC (50/60 Hz)

Breaking Capacity:

• Icu: 66 kA at 500 V
• Icu: 50 kA at 690 V

Functional Features:

Trip Unit:

• Includes ETU300 LSI trip unit optimized for standard applications, providing long-time (LT), short-time (ST), and instantaneous (INST) fault protections
• Integrated N-protection with an internal N-sensor for enhanced safety and fault response

Manual Operating Mechanism:

• Operated manually with mechanical closing, ensuring reliable operation in various environments
• Does not include a spring charging motor, making it a straightforward choice for manual control applications

Auxiliary and Alarm Switches:

• Equipped with 1xCO trip alarm switch for alarm signaling during trip events
• 2NO and 2NC auxiliary switches are included for versatile control options

Connectivity:

• Rear horizontal connection for easy and secure installation
• Guide frame comes with a shutter for safety, though it lacks a position signaling switch

Additional Features:

• No closing coil (CC), remote trip alarm reset coil (RR), or shunt trip functions, allowing it to be used in installations not requiring these additional remote functionalities

Additional Product Information:

• Product Family: 3WA1 Air Circuit Breakers for applications up to 6300 A (AC)
• Product Lifecycle (PLM): Active, ensuring support and ongoing availability
• Commodity Code: 85362090
• Catalog ID: LV10, Group Code: P360

Applications

The Siemens 3WA1110-3AB42-0AA0 circuit breaker is ideal for industrial applications that need robust, straightforward, and reliable circuit interruption. The withdrawable design provides easy access for maintenance, while the ETU300 LSI trip unit delivers critical fault protections tailored for typical electrical distribution setups. The lack of communication and metering functions keeps it simple and focused on essential protection tasks, making it suitable for use in manual and locally operated systems.