Diesel Gen-set Operation Instructions
13
Table 3-2 Function list of AS440 adjustment potentiometer
No. in
figure
Control button
Function
Direction of adjustment
1 Voltage
Adjust output voltage of
alternator
Turn clockwise to
increase output voltage
2
Droop (applicable for
parallel connection)
Droop is 5% when power
factor of Gen-set is 0
Turn clockwise to
increase droop
3 Fine
adjustment
Increase analog input
sensitivity
Turn clockwise to
increase gain or
sensitivity
4 Over-excitation
tripping
Set over-excitation tripping
trigger potential
Turn clockwise to
increase tripping trigger
potential
5
Stability
Prevent voltage swing
Turn clockwise to
increase damping effect
6
UFRO
(Under-Frequency Roll
Off)
Set UFRO knee point
Turn clockwise to
decrease knee point
frequency
3.2 BE350
Figure 3-6 BE350 wiring diagram
Notes:
For remote adjustment, use a
2Kohm and 0.5W potentiometer
(adjustment range is up to 10%).
For 50Hz alternator, its frequency
jumper shall be moved to 50Hz
terminal.
