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.

3WA1108-4AB02-0AA0

The Siemens 3WA1108-4AB02-0AA0 is a fixed-mounted circuit breaker, part of Siemens’ 3WA1 Air Circuit Breakers series, designed for high-performance protection in standard applications. Conforming to IEC 60947-2 standards, this model is engineered for reliability and safety in demanding environments.

Key Features and Specifications:

• Number: 3WA1108-4AB02-0AA0
• Frame Size: 1
• Poles: 3-pole configuration
• Rated Current (In): 800 A
• Voltage Range: Up to 690 V AC, 50/60 Hz
• Breaking Capacity:
• Icu: 85 kA at 500 V
• Icu: 66 kA at 690 V
• Trip Unit: ETU300 LSI (providing long-time, short-time, and instantaneous protection)
• Protection Types: LT (long-time), ST (short-time), INST (instantaneous) with external N-sensor required for N-protection

Functional Features:

Alarm and Safety Components:

• Includes trip alarm switch (1 x CO) for instant alert during fault conditions
• Rear horizontal connection for secure and compact installation

Manual Operating Mechanism:

• Mechanical closing with a manual operating mechanism, ideal for systems where simplicity and manual control are preferred
• No spring charging motor or automated reset functions

Auxiliary and Signaling Functions:

• Auxiliary Switches: 2NO and 2NC for enhanced flexibility in circuit monitoring and control
• Ready-to-Close Signal Switch: Provides operational readiness indication
• Excludes closing coil (CC), remote trip reset (RR), and shunt trips, keeping the unit focused on primary protection.

Additional Product Information:

• Product Family: 3WA1 Air Circuit Breakers for applications up to 6300 A (AC), IEC compliant

Compliance and Certifications:

• Commodity Code: 85362090
• Product Lifecycle (PLM): Active
• Catalog ID: LV10, Group Code: P360

Applications

The Siemens 3WA1108-4AB02-0AA0 circuit breaker is tailored for applications requiring consistent, high-current protection. With its fixed-mounted design, this circuit breaker is ideal for stationary installations in industrial and commercial power systems. The model’s robust protection and simplified manual control provide a reliable solution for critical infrastructure where dependable fault management and easy maintenance are essential.