Specification
SENSING/POWER INPUT
Voltage：90-480VAC/40-150VAC, 3 phase
MAGNETIC FIELD OUTPUT
Voltage：Max 160VDC at 120VAC input
Current：Max 10A
PRESSURE REGULATING ACCURACY
< +/-1% (with 4% engine governing)
Products Description
Specification of Leroy Somer R448 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 R448 Leroy Somer Alternator AVR:
The Leroy Somer R448 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
LAM enable/disable option
