4. TECHNICAL SPECIFICATIONS
The M40FA644A voltage regulator can be calibrated using potentiometers. The circuit board is resin-bonded in order to
maintain a high degree of operational reliability even in difficult environmental conditions (high levels of humidity, dust, a salty
atmosphere) and in the presence of vibrations.
4.1. Specifications
Power supply voltage (auxiliary windings, main terminals)
±10% of range tolerance, 100/120Hz
Voltage sensing (single-phase)
±10% of range tolerance, 50/60Hz
Maximum continuative field current
Maximum forcing field current (1 minute)
Regulation accuracy from no load to full load
From 0 to 100% of the rated load - PF 0.8 - balanced and non deforming load, constant frequency
Steady state accuracy
@ frequenza e carico costanti
Accuracy with ±4% engine governing
@ steady state conditions for load and speed
Thermal Drift
% voltage change for 50°C change from T
amb
, after 10 minutes
Internal fuse, replaceable
With external potentiometer, 100 kΩ for ∆V = ±5 % of the rated voltage
With external DC voltage signal (-3/+3 V)
Suitable for connection to power factor regulator PFR M50FA400A
Reactive droop compensation, ±20 %
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