Advanced Service And Parts LLC [home link]
Advanced Service And Parts LLC

SSL BBB Accredited  Service Manuals   
ASAP shipping methods
Visa mastercard  Acceptance Mark  American express discover

Please Notice:If you choose a UPS method upon ordering, we may switch the method to Fedex, of equal service value in regards to the number of days transit. Usually Fedex is as good or better in regards to transit time by Ground. If you choose UPS Next Day, we may switch to Fedex Priority Overnight. If this is a problem, state so in the comments of your order. Feel free to read more about our shipping policy here.

Normal Hours of operation: Mon. - Thurs. 8:00AM - 5:00PM Fri. 8:00AM - 4:00PM (EST)


Leroy Somer R449 replacement AVR (Automatic Voltage Regulator)

$695.00  $599.00
Save: 14% off


New after-market AVR is the same fit, form & function as the genuine Leroy Somer R449.

Save $1800.00 - $2000.00!  The Genuine R 449 sells for approx. $2500.00!

Replaces the following part numbers:

  • R449 LS/A
  • R449 LS/B
  • R449 LS/C
  • AEM220RE010 (AEM 220 RE 010)

 This replacement voltage regulator for R 449 is a shunt type AVR. It is designed to fit as standard on A50 to A 54 alternators.

It can be supplied with power either by a power VT, or by the AREP field excitation system, or by a single-phase or 3-phase PMG.
Using the R 726 external module, the regulator can control the power factor (2F) and can match the alternator voltage to the mains voltage (3F) prior to synchronization.

The output power is 7amps @ 63VDC under normal conditions and 15A for 10s under overload conditions.

The power can be supplied:
- using 2 independent auxiliary windings integrated in the alternator stator (AREP excitation)
- using a single or 3-phase power VT
- using a single or 3-phase PMG.

Note: The single or 3-phase input voltage must not exceed 240V AC.

Add to Cart:

  • Model: R449-A
  • 2 Units in Stock


Parse Time: 0.273 - Number of Queries: 313 - Query Time: 0.0473405972595