Actuator Control Module; Rechargeable Batteries - ABB OVR-15 Instruction, Operation And Maintenance Manual

G E N E R A L D E S C R I P T I O N O F LV C A B I N E T O F O V R -1 5 , 2 7 A N D 3 8 R E C LO S E R
For the auxiliary supply voltage/frequency
—
05 Actuator control
applicable for your recloser, please refer to
module (ACM)
the approved/as-built drawings.
An MCB is provided inside the cubicle for protection
of the intelligent battery charger, cubicle heating,
illumination and auxiliary power socket outlet.
The auxiliary power outlet on the inner
swinging door is intended only for laptop
charging in an emergency. It should not be
used for any other purpose because it may
burden the external auxiliary power source.

4.2.4 Actuator control module

The actuator control module (ACM) gets its power
supply from the intelligent battery charger.
Hardwired to the SEL-751 relay, the ACM regulates
closing and tripping signals to the magnetic
actuator in accordance with feedback from the
HV unit and interaction with the relay by charging/
discharging the capacitors.
—
05
ACM LED status
1 2 3
OFF Blinking fast OFF
Blinking Blinking fast OFF
slowly
ON Blinking fast OFF
Any Blinking slowly
ON OFF ON
OFF OFF ON
ON ON ON
4
OFF Normal condition — ACM ready
to perform operations
OFF Close operation is not allowed
OFF Neither open nor close operations are
Boot loader started, but FW is missing
OFF File system error
ON Initial condition at start-up; if LEDs remain
in this condition, the CPI has not started
ON This state shows for three seconds,
indicating ACM can receive FW upgrades

4.2.5 Rechargeable batteries

The LV unit is supplied with two 12 V batteries
connected in series and securely mounted in the
LV cabinet for providing backup power to the
recloser in case of external auxiliary power failure.
Typically, the battery bank ensures minimal
stand-by backup power for 24 hours at 20 °C from
a fully charged initial condition. However, the actual
backup duration depends upon various site
conditions, including:
• Ambient temperature and initial condition of the
battery (temperature and storage period before
commissioning, periodic charge/discharge,
battery maintenance)
• Frequency of external auxiliary power outages
and duration of each outage (i.e., the number
of charging/discharging cycles) and depth
of each discharge
• Percent charging (terminal voltage) of the battery
at the time of outage of external auxiliary power
For additional details, refer to the battery
manufacturer's documentation. Also, see the
inspection and maintenance section of this manual.
A battery temperature sensor is provided near
the battery bank terminals. Battery charging
temperature range is -20 to + 50 °C.
The batteries provided are valve-regulated lead
acid (VRLA) batteries, which are temperature and
charging voltage sensitive. Although maintenance
by way of water topping is not required, a regular
check and assurance of proper charging voltage,
depth of discharge and operating temperature
is needed.
In case of loss of external auxiliary supply, the
intelligent battery charger switches over to the
battery bank for power and continues to conduct
its function. The recloser will operate if the battery
bank voltage remains above 20.5 V. Below 20.5 V,
a load management algorithm activates within the
intelligent battery charger and disconnects the
Description
power feed to the ACM, SEL-751 and optional radio
modem. The purpose of this is to delay the
batteries going into deep discharge mode. With
the relay not being powered, the recloser will not
be able to perform any operation.
allowed
11