ABB UAD149A1501 3BHE014135R1501  

ABB’s high-performance, fully digital excitation system controller is part of the company’s renowned UNITROL® series and is one of the high-end and flagship products in the series.

1. Product Overview

The UAD149A1501 3BHE014135R1501 is a high-performance, fully digital Excitation System Controller manufactured by ABB. It belongs to ABB’s renowned UNITROL® series and is one of the premium and main product lines within this series.

• Core Function: To provide precise, reliable, and adjustable excitation current control for synchronous generators or synchronous motors.

• Primary Applications: Widely used in critical areas such as thermal power plants, hydroelectric power stations, nuclear power plants, industrial drives (e.g., for large compressors, pumps), and marine propulsion.

• Product Positioning: This is a powerful single-channel controller typically serving as the core control unit of a complete excitation system (UNITROL® excitation cabinet). It can operate as a standalone controller or communicate with a superior control system (like a DCS) to implement complex automation control.

2. Core Functions & Purpose

The excitation system is the “brain” and “heart” of a synchronous machine, and the UAD149A1501 is the core controller of this system. Its main functions include:

• Voltage Regulation: Automatically maintains the generator terminal voltage at the set value, ensuring stable power quality.

• Reactive Power Control: Regulates the reactive power output of the generator to maintain grid voltage stability and improve the power factor.

• System Stabilizer: Damps low-frequency oscillations in the power system by introducing auxiliary signals (e.g., rate of change of power, frequency), enhancing the dynamic stability of the grid.

• Motor Starting & Synchronization: Controls the smooth start-up, pull-in synchronization of synchronous motors, and re-synchronization after a grid fault.

• Protection Functions: Provides comprehensive protection functions such as over-excitation limitation, under-excitation limitation, V/Hz (Volt per Hertz) limitation, loss of excitation protection, and overcurrent protection, ensuring the safety of the machine and the excitation system itself.

• Diagnostics & Monitoring: Features built-in powerful diagnostics for real-time system status monitoring, event logging, and fault data recording, facilitating maintenance and troubleshooting.

3. Key Technical Features

• Fully Digital Design: Based on advanced microprocessor technology, offering high control accuracy, fast response, and superior reliability.

• Flexible Programming Capability: Supports graphical programming using ABB’s MACH2™ or Control Builder Plus engineering tools, allowing users to customize control logic and protection functions according to specific application needs.

• Powerful Communication Interfaces:

  • Supports multiple industrial standard communication protocols, such as Modbus RTU/TCP, IEC 61850, PROFIBUS-DP, etc., enabling seamless integration into modern automation systems.

  • Typically equipped with physical interfaces like Ethernet and serial ports (RS485/232).

• High-Resolution Measurement: Utilizes high-precision analog and digital I/O modules to ensure control accuracy.

• User-Friendly Human-Machine Interface (HMI):

  • Often used in conjunction with ABB’s CI871 or similar communication interface modules, allowing parameter setting, status monitoring, and data analysis via a web browser or dedicated software, eliminating the need for an additional display panel.

• Modular & Compact Design: Features a modular structure for easy installation, maintenance, and functional expansion.

• High Reliability: Designed for harsh industrial environments, with robust immunity to electromagnetic interference and a wide operating temperature range.

4. Typical Application Scenarios

• Power Generation Sector:

  • Large turbo-generators (thermal, nuclear)

  • Hydro-generators

  • Gas turbine generators

• Industrial Drives Sector:

  • Large synchronous motors for driving compressors, blowers, pumps, crushers, etc.

• Marine & Offshore:

  • Ship main propulsion generators and synchronous motor drives for large port equipment.

☀️Tara(Sales Director)

📞Tel: + 86-13806028623

📮Whatsapp:+86-13806028623

💬Email: ydf8801@163.com

🏚️Ship to you via DHL/TNT/UPS/EMS/Fedex

🥇Product Condition: One-year warranty

Sales of the brand:

ABB、EPRO、GE、FOXBORO、Schneider、Rexroth、Honeywell、Bently、YASKAWA other global DCS system and PLC system, servo system of famous industrial brand.

Company Overview

Main Products

We specialize in supplying original imported spare parts for DCS, PLC, robotics, and large servo systems from leading global brands, including:

• FOXBORO | EMERSON | TRICONEX | XYCOM | BENTLY
• ROCKWELL | ABB | GE | Aen-Brady | YOKOGAWA
• HONEYWELL | RELIANCE | SCHNEIDER | MODICON
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