OVR
–
Three phase mechanically ganged reclosers
Operator’s
quick reference guide for OVR-15, OVR-27 & OVR-38
Page
4
of
6
2.
LED indication on ACU
LED Status
Description
C.
Switches on relay front fascia
D.
Handling reclosers during long outages
1.
Recloser needs auxiliary power for general application. This power is generally derived from the distribution feeder itself
with the help of control transformer or fed from substation auxiliary source. In case of temporary unavailability of auxiliary
power (few hrs. in a day), the recloser is feed via internal battery bank of the LV cabinet.
2.
If battery bank is healthy and in fully charge condition i.e.
≥
24 Vdc, for the power outage can be of < 24Hrs. without any
special attention required.
3.
If power outage is for more than 24 Hrs OR typically > 10 CO operations after power failure, then it is considered as long
power outage requiring special attention of batteries.
4.
During long outages, the batteries might get drained to such a level that it might go into deep discharge stage i.e. battery
bank voltage goes below 18 V.
5.
In this situation recloser will not be able to recharge the batteries automatically and external charging may be required.
Such situation might also damage batteries permanently and thus required to be replaced.
6.
To avoid such situation, in case of power outage more than 24 Hrs. switch OFF the battery MCB D10-24. After the power is
resume, switch ON the battery MCB D10-24
7.
If power outage is more than a month, then charge the batteries on regular interval externally to keep ensure the battery
bank voltage more than 21 VDC.
1
2
3
4
OFF
Blinking
fast
OFF
OFF
Normal condition
–
ACU ready to
perform operations
Blinking
slowly
Blinking
fast
OFF
OFF
Close operation is not allowed
ON
Blinking
fast
OFF
OFF
Both open and close operations are
not allowed
Don’t
care
Blinking slowly Boot loader started but the FW is
missed
ON
OFF
ON
OFF
File system error
OFF
OFF
ON
ON
Initial condition at start-up
If the LEDs remain in this condition,
the CPI has not started
ON
ON
ON
ON
This state shows for 3 seconds
indicating ACU can receive FW
upgrades
