LTC391AE01 HIEE401782R0001 ABB Local terminal controller of the excitation system

Product Overview

ABB LTC391AE01 is a Local Terminal Controller specially designed for the UNITROL® 6000 and UNITROL® 6800 series digital excitation systems. As the core human-machine interaction (HMI) interface between the operation personnel and the excitation system. This device offers local operation, parameter display, alarm management and manual control functions, ensuring that the excitation system can still be operated safely and efficiently during remote communication interruption or debugging and maintenance.

Core features

High-visibility human-machine interface
5.7-inch monochrome LCD display (with backlight)
Resolution: 320 × 240 pixels
Support multi-language menus (including Chinese, English, Russian, etc.)
Local operation function
Adjustment of voltage/reactive power set values
Excitation engagement/exit (FCB), channel switching
Manual/automatic mode switching
Alarm confirmation and reset
Real-time data monitoring
Generator terminal voltage, stator current, rotor current/voltage
Reactive power, power factor, AVR output
System status (running/Down/faulty)

Technical parameters

Thermal/hydroelectric power plants: As the operation terminal of the main control room or local excitation cabinet
Gas turbine power station: Achieve local intervention during the rapid start-stop process
Industrial self-provided power stations: Provide backup control means when DCS communication fails
Black Start scenario: Voltage can be manually established without the need for an upper system
Equipment commissioning and maintenance: Engineers on-site inspect internal variables, modify parameters, and test functions

Installation and Usage instructions
Mechanical installation
Make a hole of 138 × 138 mm in the control cabinet door panel.
Insert the LTC391AE01 from the front and lock it with a snap at the back.
Install the sealing gasket to ensure IP65 protection.
Electrical connection
Connect to the LTC interface of the main control board of the excitation system (PSC391) using shielded twisted-pair cables.
The power supply is provided by the 24V DC bus inside the excitation system (no external power supply is required).
Operation function
The system status is automatically synchronized upon startup.
Select menu items through the knob and confirm the operation by pressing the button.
Real-time display of key electrical parameters and alarm information;
Support local modification of AVR Settings (permissions required).
Maintenance tip
For screen cleaning, use a lint-free soft cloth and neutral detergent.
Regularly check whether the shielding grounding of communication cables is in good condition.

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