Emerson ASTEC Helios Candeo AP6C75AA Installation Manual page 71

5 Connect the –48 V lead(s) at the negative (–) terminal(s) of the battery string(s).
Torque as recommended by the battery manufacturer.
6 Connect the battery return lead(s) (+) at the positive (+) terminal(s) of the
battery string(s). Torque as recommended by the battery manufacturer.
WARNING! Before completing the connection of the battery return leads (+)
from the AP6C75AA Helios Candeo power system battery return busbar (BR+)
to the positive (+) terminal of the battery strings, measure with a voltmeter
across the connection to be made. The voltage difference measured must not be
greater than 0.05 volt. This is necessary to prevent significant current flow and
thus any sparking. If the voltage difference is greater than 0.05 volt, then use a
resistance lamp in series across the connection to equalize the potential.
Note: Any potential difference that may exist should be small and would be
caused by internal circuits of the AP6C75AA Helios Candeo power
system. If the resistance lamp continues to glow brightly as the
connection is being made, the installer should discontinue from making
the connection and rather proceed to re-verify all cabling for possible
short circuits. Verify again that all circuit breakers are in the OFF
position and that all fuses are removed on the power system.
Once the battery string cables have been connected, use a multimeter to check
for proper polarity at the charge and discharge busbars before installing any
fuses or operating any circuit breakers.
–end–
Helios Candeo Power System – AP6C75AA Installation Manual
Cabling and connecting 71