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.

3WA1112-4AB02-0AA0

The Siemens 3WA1112-4AB02-0AA0 is a fixed-mounted circuit breaker designed for robust and efficient electrical protection. It adheres to the IEC 60947-2 standard and is part of the 3WA1 Air Circuit Breakers family.

Key Features and Specifications:

• Number: 3WA1112-4AB02-0AA0
• Mounting Type: Fixed-mounted
• Frame Size: 1
• Poles: 3-pole configuration
• Rated Current (In): 1250 A
• Voltage Rating: Up to 690 V AC (50/60 Hz)

Breaking Capacity (Icu):

• 85 kA at 500 V
• 66 kA at 690 V

Features and Functionalities

Trip Unit:

• Equipped with the ETU300 LSI trip unit optimized for standard applications

Provides protection for:

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

Connections:

• Rear horizontal connection for easy integration

Alarm and Indicators:

• Includes a trip alarm switch (1xCO)

Manual Operating Mechanism:

• Features mechanical closing for manual operation

Excludes:

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

Auxiliary Features:

• Includes 2NO and 2NC auxiliary switches

Display and Communication:

• Lacks display, communication, and metering functionalities

Additional Product Information:

• Product Family: 3WA1 Air Circuit Breakers for up to 6300 A (AC), IEC
• Product Lifecycle (PLM): Active product (PM300)
• Commodity Code: 85362090
• Catalog ID: LV10
• Group Code: P360

Applications

The Siemens 3WA1112-4AB02-0AA0 is suitable for:

• Standard industrial and commercial power distribution systems
• Systems requiring high fault-breaking capacity (up to 85 kA at 500 V)
• Reliable and efficient protection with manual operation

This fixed-mounted circuit breaker is a dependable solution for safeguarding electrical systems while offering easy maintenance and integration.