Product Details

Leroy Somer AVR R449 Automatic Voltage Regulator (Replacement)

We provide good quality replacement model for Leroy Somer AVR R449 with very reasonable price!

R230, R250, R438, R448, R449, R450

The Brands mentioned here are for reference purpose only, our parts can exactly replace the original ones.

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One year Quality Warranty;
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The circuitry of the R449 Voltage Regulator (AVR) provides closed loop control of the alternator output voltage by regulating the exciter field current.

The R449 Leroy Somer AVR can be powered by either AREP or the PMG field excitation systems and is fitted as standard on following alternators:

8100 Series Alternators
9100 Series Alternators

Specification:

Steady state voltage regulation ± 0.5%
Short circuit capability: 3 x Irated for 10 seconds (AREP or PMG excitation)
Voltage sensing:
0-110v Terminals = 95 to 140 volts (50/60 Hz) or
0-220v Terminals = 170 to 260 volts (50/60 Hz) or
0-380v Terminals = 340 to 520 volts (50/60 Hz)
Response time:
Normal (1 sec) for ± 20% voltage variation or Rapid (0.3 sec) for ± 20% voltage variation
Remote voltage adjustment range: ± 5%

Load Adjustment Module (LAM):

On load impact, the rotation speed of the generator set decreases. When it passes below the preset frequency threshold, the LAM causes the voltage to drop by approximately 15% and consequently the amount of active load applied is reduced by approximately 25% until the speed reaches it's rated value again

Adjustment capability:

The R449 AVR features the following adjustment capabilities (Please note that no adjustments should be made prior to careful consultation of the alternator installation and maintenance manual):