The circuitry of the R448 Voltage Regulator AVR provides closed loop control of the alternator output voltage by regulating the exciter field current.

The R448 AVR can be powered by Shunt, AREP or PMG field excitation systems and is fitted as standard on:

5000 Series Alternators

6000 Series Alternators

7000 Series Alternators

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