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.

3WA1108-4AB42-0AA0

The Siemens 3WA1108-4AB42-0AA0 is a high-quality withdrawable circuit breaker designed with a guide frame and engineered for demanding applications. It is part of the 3WA1 Air Circuit Breakers series, meeting IEC 60947-2 standards to ensure performance and safety in industrial environments.

Key Features and Specifications:

• Number: 3WA1108-4AB42-0AA0
• Frame Size: 1
• Poles: 4-pole configuration, with the N-pole located on the left side
• Rated Current (In): 800 A
• Voltage Range: Supports 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 optimized for standard applications, offering long-time (LT), short-time (ST), and instantaneous (INST) protection
• N-Protection: Equipped with an internal N-sensor for enhanced protection of the neutral pole

Functional Features:

• Guide Frame and Withdrawable Mechanism:
• Features a guide frame with a shutter for safe handling during maintenance and withdrawable function
• Rear horizontal connection ensures a reliable and secure installation

Alarm and Monitoring:

• Includes a trip alarm switch (1 x CO) for immediate fault indication
• Excludes communication and metering functions, focusing on primary protection

Manual Operation:

• Operated via a manual mechanism with mechanical closing, making it suitable for systems prioritizing direct control
• No spring charging motor, closing coil, or remote trip alarm reset, keeping the design focused on simplicity and reliability

Auxiliary Features:

• Equipped with 2NO and 2NC auxiliary switches for additional circuit control and monitoring options
• Ready-to-close signal switch included for operational readiness indication

Additional Product Information:

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

Applications

The Siemens 3WA1108-4AB42-0AA0 is ideal for installations that require a flexible, withdrawable circuit breaker with reliable performance in high-current applications. With robust protection features and a guide frame with shutter, it provides an efficient and safe solution for critical industrial systems. This model is particularly suitable for environments where regular maintenance and direct manual operation are essential.