![background image](http://html1.mh-extra.com/html/nidec/leroy-somer-r449/leroy-somer-r449_installation-and-maintenance-manual_1687803021.webp)
2018.01 / g
Electric Power Generation
21
Installation and maintenance
R449 revision f
AVRs
3983 en -
The following settings are for the R726.
Close the 3F contact (terminals 5 and 6 of J1
of the R726 or terminals 34 and 35 of
terminal block C of the alternator). The red
LED lights up. Adjust potentiometer P1 to
match the alternator voltage to the mains
voltage.
- Power factor regulation with the alternator
synchronised with the mains (2F):
The following settings are for the R726.
When the alternator is in phase with the
mains and the mains and alternator voltages
are equal, proceed with synchronisation.
Contact 2F closes when the circuit breaker
is closed. The green LED on the R726 lights
up. Open contact 3F and remove the mains
voltage reference.
Preset the PF potentiometer P2 to 5 and
limit potentiometer P4 to 3.5.
Without supplying kW power to the mains,
the reactive current of the alternator should
be at or around 0.
Increase the kW power. When it reaches
50% of the rated power, adjust potentiometer
P4 to obtain a PF of 0.9 LAG (inductive) on
the alternator. The range is then 0.7 LAG PF
(inductive) (P2 turned fully clockwise) to
0.95 LEADING (capacitive) (P2 turned fully
anti-clockwise).
Adjust P2 to obtain the required power factor
value.
Increase the kW power until it reaches the
rated power. The PF should remain constant.
If it becomes unstable, adjust potentiometer
P3 on the R726 or potentiometer P3 on the
R449.
- Stop the alternator and reconnect the
external potentiometers.