SIEMENS 3WT9841-4AA00 ETU35WT CIRCUIT BREAKER DIGITAL TRIP UNIT 11:59

SIEMENS 3WT9841-4AA00 ETU35WT CIRCUIT BREAKER DIGITAL TRIP UNIT

• SIEMENS
• 3WT9841-5AB00
• S ZVA9005012013
• AE501075812
• ES: 0303
• EU37WT

The Siemens 3WT9841-4AA00 is a state-of-the-art ETU35WT Electronic Trip Unit designed for use with Siemens 3WT series air circuit breakers. This digital module serves as the “intelligent brain” of the breaker, providing advanced protection, precise monitoring, and comprehensive communication capabilities for low-voltage power distribution systems.

Key Features & Highlights

• Advanced Digital Protection: Offers highly accurate and adjustable protection functions to safeguard electrical equipment from damage due to overloads, short-circuits, and ground faults.

• Comprehensive Measurement & Monitoring: Continuously measures and displays key electrical parameters like current, voltage, power, energy, and frequency, enabling proactive system management.

• Powerful Communication Ready: Equipped with a Communication Ready (CR) module slot, allowing for easy integration into industrial networks via PROFIBUS DP or Modbus RTU protocols for centralized supervision and control.

• Large Graphical Display: Features a high-contrast, backlit LCD that provides clear visualization of measured values, status information, and event logs.

• Enhanced Safety & Diagnostics: Includes detailed event recording and fault diagnostics to quickly identify the cause of a trip, minimizing downtime during troubleshooting.

• Robust and Reliable: Designed and manufactured by Siemens to the highest quality standards, ensuring long-term reliability in demanding industrial and commercial environments.

Technical Specifications

• Manufacturer: Siemens

• Product Type: Electronic Trip Unit (ETU)

• Article Number: 3WT9841-4AA00

• Trip Unit Designation: ETU35WT

• Rated Current (Iu): This ETU35WT unit is typically used with breakers having a rated current up to 630A. (The specific breaker frame size must be confirmed).

• Protection Functions:

  • L – Long-Time Delay Protection: For overloads.

  • S – Short-Time Delay Protection: For short-circuits.

  • I – Instantaneous Protection: For high-level short-circuits.

  • G – Ground-Fault Protection: For earth leakage faults.

• Communication: Communication Ready (CR) slot for optional plug-in modules (e.g., PROFIBUS DP or Modbus RTU).

• Display: Graphical LCD with user-friendly navigation buttons.

• Standards Compliance: Meets relevant international standards for safety and performance.

Primary Applications

The ETU35WT is ideal for a wide range of applications requiring reliable and intelligent circuit protection, including:

• Main Power Distribution Boards in industrial plants and commercial buildings.

• Power Distribution in Data Centers and critical infrastructure.

• Motor Control Centers (MCCs) and large machinery power feeds.

• Shipboard and Offshore Electrical Systems.

• Any application where system visibility, remote control, and detailed fault analysis are critical.

Benefits for the User

• Increased System Availability: Prevents unnecessary trips and allows for selective coordination, isolating only the faulty section of the network.

• Reduced Downtime: Fast and precise fault location through detailed event logs and diagnostics.

• Improved Energy Efficiency: Monitoring of power and energy consumption helps identify opportunities for cost savings.

• Seamless Integration: Easy connection to SCADA, PLC, and Building Management Systems (BMS) via industry-standard communication protocols.

• User-Friendly Operation: Intuitive interface simplifies configuration, setting adjustments, and data reading.

Compatibility

This trip unit is designed exclusively for use with Siemens 3WT Air Circuit Breakers. It is crucial to verify compatibility with the specific 3WT breaker frame and rating.