ACB: SENTRON 3WTPlus Microprocessor based trip unit – 3WT8081-6UA34-5AB2

Product Description

SENTRON 3WTPlus ACB – Microprocessor Based Trip Unit – 3WT8081-6UA34-5AB2

The Siemens 3WT8081-6UA34-5AB2 is a high-end microprocessor-based trip unit system used in the SENTRON 3WTPlus Air Circuit Breaker (ACB) range. It is designed for intelligent protection, monitoring, and control of low-voltage power distribution systems, ensuring safe and reliable operation in critical electrical networks.

This trip unit is part of the ETU37WT LSING protection platform, offering advanced electronic sensing for overload, short circuit, and earth fault protection, along with real-time monitoring and system diagnostics. It is widely used in industrial plants, commercial complexes, data centers, and utility power distribution systems, where continuous power availability and system selectivity are essential.

According to Siemens technical configuration data, this model is used in a 3-pole withdrawable ACB (Size 1) with a rated current of 800 A and a short-circuit breaking capacity up to 66 kA at 500 V AC, making it suitable for heavy-duty industrial applications.

🔹 Key Features

• Siemens SENTRON 3WTPlus ACB system
• Part Number: 3WT8081-6UA34-5AB2
• Microprocessor-based electronic trip unit (ETU37WT / LSING)
• Protection functions: overload, short circuit & earth fault
• High-precision current measurement using internal CTs
• Integrated LCD display for real-time status monitoring
• Adjustable protection settings for selectivity & coordination
• Event logging and fault indication system
• Withdrawable (draw-out) breaker compatibility
• High short-circuit withstand capability
• Mechanical lockout and safety interlocking system
• Complies with IEC 60947-2 standards