12
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
170 ÷ 277 Vac
Voltage build-up
5 Vac
Voltage sensing (single-phase)
±10% of range tolerance, 50/60Hz
170 ÷ 480 Vac
Current sensing
0 ÷ 1 Aac
Maximum continuative field current
0 ÷ 8 Adc
Maximum forcing field current (1 minute)
0 ÷ 15 Adc
Maximum field voltage
100 Vdc
Field resistance
3
÷ 20
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
±0.5 %
Steady state accuracy
@ frequenza e carico costanti
±0.1 %
Accuracy with ±4% engine governing
@ steady state conditions for load and speed
±1 %
Thermal Drift
% voltage change for 50°C change from T
amb
, after 10 minutes
±0.5 %
Response time
1 ciclo
Operating temperature
-30°C ÷ +70°C
Storage temperature
-40°C ÷ +80°C
4.2.
Functions
Protection
Under-frequency limiter
Over-excitation limiter
Internal fuse, replaceable
Control
With external potentiometer, 100 k
Ω for ∆V = ±5 % of the rated voltage
With external DC voltage signal (-3/+3 V)
Suitable for connection to power factor regulator PFR M50FA400A
Parallel
Reactive droop compensation, ±20 %
4.3.
Dimensions
L
180mm
B
170mm
K
160mm
J
150mm
H
41mm
D
6.5mm
Weight
670g
L
B
H
K
J
D
