Automatic Voltage Regulator for LSA alternators


AVR R450The R450 automatic voltage regulator (AVR) for the LSA series of industrial alternators provides excitation current up to 6 A with excellent reliability for SHUNT, permanent magnet (PMG) or AREP (auxiliary winding) excitation types. 

The R450 includes advanced protections such as over-excitation limitation and voltage sensing loss, and also features voltage droop for genset parallel operation. The R450 is also equipped with a Load Acceptance Module (LAM) to handle load impact events. 


Key specifications

 Technology  Analog
 Excitation mode SHUNT, AREP, PMG
 Rated excitation current 6 A
 Regulation accuracy (+/- %) 0.5 %
 Frequency range 10 – 100 Hz
 Voltage setting range (+/- %) 5 %
 kU/F limitation K = 1&2
 Loss of sensing voltage
 Over-excitation limitation
 Short circuit current limitation
 Voltage droop
 Parallel operation between alternators
 Load Acceptance Module (LAM)


Compatible products


  • R450M with Mate-N-Lok connectors
  • R450T with Mate-N-Lok connectors and 3-phase sensing module


  • Use R726 module for Power factor regulation (PF)
  • Use R729 for PF + kVAr regulation and 4-20 mA signal treatment
  • External potentiometer
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