Leroy-Somer R452 Installation And Maintenance Manual page 18

LEROY-SOMER
INSTALLATION AND MAINTENANCE
Ref. 3563 GB - 4.33 / a - 01.02
VOLTAGE REGULATOR R452
C
OMMISSIONING
- Power factor regulation with the alternator synchronised to
the mains voltage (2F):
- The following settings are for the R 726.
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 R 726 lights up. Open
contact 3F and remove the mains voltage reference.
Preset 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 PF range is then 0.7 LAG
(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 R 726
or potentiometer P3 on the R 452.
- Stop the alternator and reconnect the external
potentiometers.
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