Automatic Voltage Regulator


AVR R220The R220 automatic voltage regulator (AVR) for the Leroy-Somer LSA series of industrial alternators provides excitation current up to 3.2 A with excellent reliability for SHUNT excitation types. 

The R220 AVR cannot be used in dedicated single-phase 60 Hz. Please use dedicated R221.

Key specifications

 Technology  Analog
 Excitation mode SHUNT, 3-phase and 1-phase
 Rated excitation current  3.2 A
 Regulation accuracy (+/- %) 0.5 %
 Frequency range 10 – 100 Hz
 Voltage setting range (+/- %) 5 %
 kU/F limitation K = 1
 Loss of sensing voltage -
 Over-excitation limitation -
 Short circuit current limitation -
 Voltage droop -
 Parallel operation between alternators -
 Load Acceptance Module (LAM) -


Compatible products


  • External potentiometer
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