Automatic Voltage Regulator

An automatic voltage regulator (AVR) is an electronic device that maintains a constant voltage level to electrical equipment on the same load. The AVR regulates voltage variations to deliver constant, reliable power supply.

  • Brand: Leroy-Somer
  • Frequency: 50/60 Hz
  • Application: Alternator voltage regulation
  • Model: Leroy-Somer AVR, R230,R250, R438,R448,R449, R450

  • Parameters
  • Brand: Leroy-Somer
  • Frequency: 50/60 Hz
  • Application: Alternator voltage regulation
  • Model: Leroy-Somer AVR, R230,R250, R438,R448,R449, R450

Automatic Voltage Regulator


R250 

AVR FOR ALTERNATORS WITH SHUNT EXCITATION




R250 is an analog AVR with power controled by transistors. It is designed for small alternators with a SHUNT excitation. 

R250 controls the excitation current in order to maintain the output voltage of the alternator. R250 is performant in 

terms of voltage regulation, simple to set, to use and is reliable. It is in compliance with IEC 60034-1 standard and 

UL 508 / CSA approved.


KEY FEATURES


• Voltage regulation: ± 0.5 % 

• U/F function 

• LAM function 

• Quick response: 500 ms 

• Nominal excitation current: 5A 

• Maximum excitation current:7A during 10 s 

• Supply range / voltage detection:85 to 139 V (50/60Hz) 

• Protection: fuse 8A 

OPERATION CONDITIONS


• Operating temperature range:- 40° C to + 65° C 

• Storage temperature range:- 55° C to + 85° C 

• Hygrometry: 98% 

• Maximum impact: 9 g on 3 axis 

• Vibrations: less than 10 Hz,2 mm peak magnitude 

• From 10 Hz to 100 Hz: 100 mm/s,below 100 Hz: 8g



CONNECTIONS AND SETTINGS


Settings are done through the AVR.                                                 

• Potentiometer P1: voltage setting 

• Potentiometer P2: stability setting 

• Strap ST3: frequency selection 

• Jumper: frequency, U/F function,LAM function 

• Potentiometer ST4: remote voltagesetting





























Automatic Voltage Regulator
An automatic voltage regulator (AVR) is an electronic device that maintains a constant voltage level to electrical equipment on the same load. The AVR regulates voltage variations to deliver constant, reliable power supply.
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