UNITROL® 5000 Excitation Systems

Control functions:

• Voltage regulator with adjustable PID controller (AUTOMATIC mode)
• Field current regulator with adjustable PI controller (MANUAL mode)
• Reactive power influence (Droop or compensation)
• Underexcitation and overexcitation limiters
• Automatic follow up between Automatic <-> Manual as well as Channel 1 <-> Channel 2
• Superimposed controller for machin or T-line
• Power factor or MVAr
• Power system stabilizer (IEEE 2 A, APSS, Multiband)
• Manual restrict (option)

• Overcurrent protection, inverse time and instantaneous
• Loss of excitation
• Overfluxing protection (V/Hz relay)
• Converter temperature monitoring
• Individual thyristor conduction monitoring
• Rotating diodes monitoring (option - requires additional sub-print)
• Processor and software monitoring
• Integrated fault/alarm logger
• Transient recorder function

• Display of four actual values in digital mode and in bar mode
• Displays operating status and alarms
• Comfortable local control

• MODBUS
• AF100
• PROFIBUS DP or FMS