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):
- Quadrature droop adjustment
- Alternator output voltage adjustment
- Stability adjustment
- LAM Threshold (underspeed) adjustment
- Excitation ceiling adjustment
- Selection of single phase or three phase* voltage sensing
- Selection of normal or rapid response time
- 50 Hz or 60 Hz frequency option
- Remote voltage adjustment option
- LAM enable/disable option
