🔹 Siemens SENTRON 3WT Air Circuit Breaker – 3WT8125-6UA38-5AB2 (Microprocessor Trip Unit ACB)
🔹 Product Description
The Siemens 3WT8125-6UA38-5AB2 is a SENTRON 3WT series Air Circuit Breaker (ACB) designed for high-capacity low-voltage power distribution systems with advanced electronic protection. It is equipped with a microprocessor-based electronic trip unit (ETU) that provides precise and intelligent protection for modern electrical infrastructure.
This breaker is widely used in industrial plants, large commercial buildings, data centers, utility substations, and critical power distribution networks, where reliable fault protection and system selectivity are essential.
The integrated microprocessor trip unit offers protection against overload, short circuit, and earth fault conditions, along with adjustable settings, real-time diagnostics, and improved coordination with other protection devices. This ensures higher system stability and reduced downtime.
The SENTRON 3WT series is Siemens’ advanced intelligent ACB platform, designed for digital power distribution. It supports modular construction, withdrawable design, and communication-ready architecture, making it suitable for integration into SCADA and energy management systems.
According to Siemens 3WT series specifications, this platform supports high-rated current frames up to 4000A with strong breaking capacity (up to ~80kA range depending on variant), making it suitable for demanding industrial applications.
🔹 Key Features
• Genuine Siemens SENTRON 3WT Air Circuit Breaker
• Model: 3WT8125-6UA38-5AB2
• Microprocessor-based electronic trip unit (intelligent protection system)
• Protection against overload, short circuit, and earth fault
• High breaking capacity for industrial-grade power systems
• Withdrawable (draw-out) type design for easy maintenance
• Supports selective coordination in complex networks
• Suitable for PCC, MCC, and LT distribution panels
• Compatible with SCADA and energy monitoring systems
• High reliability and long operational life
| Parameter | Specification |
|---|---|
| Product Series | Siemens SENTRON 3WT |
| Model Number | 3WT8125-6UA38-5AB2 |
| Product Type | Air Circuit Breaker (ACB) |
| Rated Current | 1250 A |
| Poles | 4 Pole |
| Trip Unit | Microprocessor-based Electronic Trip Unit (ETU) |
| Protection Functions | Overload, Short Circuit, Earth Fault |
| Mounting Type | Withdrawable / Draw-out type |
| Breaking Capacity | ~66 kA (typical class for this frame) |
| Application | Industrial / Commercial Power Distribution |
| Brand | Siemens |
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