This unit is designed for alternators with an AREP (Auxiliary Winding regulation Excitation Principle) or PMG (Permanent Magnet Generator) excitation. The R449 AVR controls the excitation current in order to maintain the output voltage of the alternator. This is most important as a surge or dip in voltage can damage many machines. Having an AVR will ensure a constant and stable voltage supply and is simple to set to the particular needs of your machines. It is easy to use and has been proven to be very reliable. The modern solid state system AVR has many advantages over the old style electromechanical system. It is a feedback control system that measures the output voltage of a generator or alternator and compares it to a set point. If it detects a difference in voltage it adjusts the excitation of the power unit to correct the voltage. This happens in micro seconds and prevents any damage occurring.
Features and Characteristics of R449 Leroy-Somer Automatic Voltage Regulator
Some of the main features are:
Voltage regulation around 0.5
Response time : 500ms
Nominal excitation current : 7 amps
Maximum excitation current : 15 amps during 10 seconds
Supply Range and voltage detection 85 to 520 volts at 50 or 60 Hertz
Protection : 16 amp fuse mounted outside
The operating temperature ranges from – 30 degrees Celsius up to 65 degrees Celsius. The storage temperature has a far wide range of anywhere between -55 degrees Celsius up to 85 degrees Celsius. The hygrometry that it can tolerate is up to 98. It has a potentiometer for easy adjustment of droop settings as well as voltage settings and stability setting. The potentiometer also sets the excitation ceiling. The AVR controls current by using power electronic devices where a small part of the alternator or generators output is used to provide current. The unit can be mounted wherever it is convenient so long as it is out of the way of the general operation area. While connecting the unit remember to always treat it as live.