Main features
Digital microprocessor Automatic Voltage Regulator
IGBT DC/DC switching power converter
“Voltage Sensing” with true RMS measurement (for minimum susceptibility to non-linear
loads and distorted waveforms)
Three-phase sensing (6 measures: phase to phase and phases to neutral) and singlephase
sensing
Self learning for alternator connection (single-phase, three-phase star or delta)
Voltage accuracy : ± 0.5% from no-load to rated load in steady state conditions, with any
power factor and for frequency variations ranging from -5% to +20% of the rated value
Load Acceptance Module (LAM) for optimal transient voltage
Maximum continuous output current : 7A (15A in overload for limited time spans)
Very high overload capability (start-up of induction motors) comparable to compound
alternators
Low build-up voltage : < 3Vac
50/60 Hz selectable by DIP switch
Remote control through potentiometer or 0÷5Vdc signal
AVR Controls (trimmers):
P1 Volt: to adjust output voltage ± 10%
P2 Stab: to adjust stability (dynamic response)
P5 kVA: to adjust maximum excitation and maximum output power. The set value is
delayed to allow the necessary transient overloads.
Protections and LED warnings
Output voltage limitation in case of highly unbalanced loads
Underspeed
Sensing wire breakage
Excitation overcurrent
Overloads
Short-circuits
High operating AVR-d temperature
Environmental features
Robust mechanical design and coated components to withstand vibration and harsh
environments
Operating temperature range: - 30°C to +70°C
Vibrations: < 2 G (10 - 30 Hz), < 5 G (30 - 500 Hz)
Storage temperature range: - 40°C to + 85°C
Relative Humidity: <95% non-condensing
Dimensions: 148 x 121 x 52 mm (AVR760D), 127 x 115 x 52 mm (AVR960D)
Weight: 550 g
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