Leroy Somer AVR R449 | Original
The regulator includes:
- A main terminal strip (10 terminals)
- A secondary terminal block (5 terminals)
- A frequency selection terminal block (3 terminals) – A quadrature droop potentiometer
- A voltage potentiometer
- A stability potentiometer
- A maximum excitation potentiometer
- A sensing selection jumper ST1 (single/3-phase with an external module)
- A response time jumper ST2 – A frequency selection jumper ST3 – An external voltage setting jumper ST4 – A LAM (load adjustment module) jumper ST5
- From R449 Version E number 10,000, this jumper will be removable.
- A selecti
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The R449 Voltage Regulator (AVR) actively controls alternator output by regulating the exciter field current, ensuring stable and precise voltage for your generator. Compatible with AREP or PMG excitation systems, the R449 comes standard on Ø8100 and Ø9100 series alternators and supports LSA51.2, LSA53.1, and LSA54 models.
This shunt-type AVR maintains steady-state voltage regulation of ±0.5% and offers rapid response times, protecting your system during transient load changes. With optional Load Adjustment Module (LAM), the R449 reduces voltage by approximately 15% during low-speed operation, limiting active load by about 25% until the generator returns to rated speed.
Adjustments include quadrature droop and alternator output voltage, allowing precise tuning for optimal performance. The R449 ensures reliable, efficient, and consistent power output for a wide range of industrial generator applications.
