ABB OVR-15 Instruction, Operation And Maintenance Manual page 20

20 O V R - 1 5 , 2 7 A N D 3 8 O U T D O O R VA C U U M R E C L O S E R L O W VO LTA G E U N I T W I T H S E L -7 5 1
No. Trouble/malfunction
4 Recloser (AR) is ready,
but CLOSE operation is
not possible from SEL-751
local HMI or remote
5 Battery failure
6 Condition monitoring
alarm activated
(This is a proactive alarm
about a recloser condition
that may require attention
in the near future)
Indication/observation Possible causes
SYN CHECK LED The phase sequence of the
(if applicable) on relay MV power connections on
HMI turns RED both sides of the recloser
do not match each other
Synchronizing and
energization check
conditions are not being
satisfied as per settings
of SECRSYN function block
Battery status MCB for battery is OFF
LED on relay HMI
turning RED
Battery connections to
charging device are loose
or have wrong polarity
Battery unhealthy (battery
may have undergone deep
discharge or excessive
temperatures or exceeded
working life)
Condition monitoring Out of the rated life of
alarm on relay HMI 10,000 CO operations,
turning RED 9000 operations have been
completed and last 1000
operations remain
Recloser has completed
a greater number of open
operations on higher
currents (fault currents)
Recloser is in inactive
(no close/open operations)
stage for more than 2000
days; after the latest ON/
OFF operation while LV unit
powered ON
Remedy/troubleshooting
Check and correct the phase
sequence of the MV power
cable connections to the
recloser terminals
Check system voltage
parameter and
network status
Switch ON the MCB
for battery
Check, correct and secure
battery connections to
charging device with
correct polarities
Check battery health
and replace the battery
if needed
Contact the nearest ABB
Customer Service Group
for further advice