![background image](http://html1.mh-extra.com/html/nidec/leroy-somer-d510-c/leroy-somer-d510-c_installation-and-maintenance-manual_1687795056.webp)
2019.02 / p
Electric Power Generation
56
Installation and maintenance
D510 C
Digital voltage regulator
4243 en -
Fault
Fault
Fault
Not enabled
Fault
Fault
Enabled
OK
OK
OK
OK
OK
KVAR phase imbalance or
Incorrect PF regulation
Check that KVAR or PF
mode has been enabled
(yellow LED on)
Check whether quadrature
droop has been enabled
Check the no-load voltages
are matched before
connecting
Quadrature droop
disabled
Enable KVAR or PF
regulation (yellow LED on)
Check the wiring of the
voltage sensing U/V/W
Match the voltages
Check the position of the
CT on phase U (P1 at
source end) and the
output connections (S1-S2)
Replace the D510C AVR
Start generator and
control running
Modify the wiring
Modify the wiring