HT INDUSTRIAL AUTOMATION LIMITED

Leroy Somer Alternator Voltage Regulator AVR R449

R449 Product Specification Download.pdf

R449 Manual Download.pdf

We have Leroy Somer Alternator AVR R449 in our regulator stock!

Replacement Models: R220, R230, R250, R438, R448, R449, R450

Original Modules: D510C, R120, R129, R250, R438, R449, R450, R450M, R450T, R630, R726, R731 

The Brands / Part No. here are for reference purpose only, our parts can exactly replace the original ones.

The circuitry of the Leroy Somer 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: 

Ø  8100 Series Alternators

Ø  9100 Series Alternators

Compatible Leroy Somer Alternators : LSA51.2, LSA53.1 , LSA54 

Specification of Leroy Somer R449 AVR: 

Ø  Steady state voltage regulation ± 0.5%

Ø  Short circuit capability: 3 x Irated for 10 seconds (AREP or PMG excitation)

Ø  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)

Ø  Response time:

Normal (1 sec) for ± 20% voltage variation or Rapid (0.3 sec) for ± 20% voltage variation

Ø  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 of R449 Leroy Somer Alternator AVR:

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

n  Quadrature droop adjustment

n  Alternator output voltage adjustment

n  Stability adjustment

n  LAM Threshold (underspeed) adjustment

n  Excitation ceiling adjustment

n  Selection of single phase or three phase* voltage sensing

n  Selection of normal or rapid response time

n  50 Hz or 60 Hz frequency option

n  Remote voltage adjustment option

n  LAM enable/disable option