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)
Monitoring and protection functions:
  • 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
Local operating panel:
  • Display of four actual values in digital mode and in bar mode
  • Displays operating status and alarms
  • Comfortable local control
Serial communication processors for the following communication protocols:
  • MODBUS
  • AF100
  • PROFIBUS DP or FMS

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