ABB UNITROL® 5000 Excitation Systems

ABB UNITROL® 5000 Excitation Systems

DESCRIPTION

The UNITROL 5000 is the most powerful product in the ABB Switzerland UNITROL® series of excitation systems. The microprocessor-based voltage regulator uses the latest available technology. The development is based on more than 40 years experience with semiconductor voltage regulators and more than 15 years experience with microprocessor technology for this application.

Application areas

• Static Excitation Systems (SES) for 50 Hz, 60 Hz or 16 2 /3Hz power supply with field currents from 1000 ADC to more than 10,000 ADC 

• Automatic Voltage Regulating Systems (AVR) for exciter machines with special functions, supply frequencies from 16 2 /3Hz to 400 Hz.

Regulator highlights

Additional regulator redundancy 

• Dual-channel system with backup current regulator 

Digital input processing 

• Three-phase voltage measurement 

• Three-phase current measurement 

• Digital processing of the input values with a signal processor 

Additional functions 

• Software solutions only – without additional hardware

Additional inputs and outputs 

• Easy to extend to the required number with ARCnet® devices 

• Digital and analog Event and error log 

• With real-time stamp 

• Remote interrogation possible.

Power section highlights

Power converter redundancy 

• Up to a maximum of eight parallel power converters are possible 

• Power converter redundancy is completely independent of the regulator configuration

Intelligent power converter electronics

• Active equalization of the current between the power converters 

• 4-quadrant operation (negative excitation current is possible) 

• Thyristor current monitoring 

• Fan control and monitoring 

• Monitoring of fuses, power converter temperature and cooling-air flow 

• Bridge current display.

Communication with the system

• The most frequently used protocols for higher level control systems are supported 

• A second control panel in the control room is possible, up to a maximum distance of several 100 m 

• Remote diagnostics by an ABB service office is available via Internet using the PC software “AVRview”.