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Replacing DC Breakers and Fuses
If a DC circuit breaker or fuse fails or becomes damaged, you can replace the breaker or fuse
in the field as described below.
Replacing Breakers
Circuit breakers protect the power circuits for the C7 shelves and battery strings. The
breakers are located on the DC distribution panel.
Circuit Type
Breaker Rating
C7 shelves
30 Amp
Battery strings
40 Amp
DANGER!
High voltage may be present. Only a qualified electrician
should perform this task. Follow NEC and local codes when handling
power systems.
WARNING!
Risk of electric shock. The following procedure can be
performed with the breaker assembly hot, provided that the new breaker is
installed in the
OFF
position.
Note:
To avoid an interruption of service, you can replace breakers while the distribution
system is hot. The bullet-style breakers can be removed with no wiring disconnections. Refer
to the
Valere DC Distribution Panel
manual for more information.
If you elect to replace a breaker with the power off, wait until a maintenance window to
minimize service impact. To disconnect power to the breakers, switch the 30A Rectifier A
and Rectifier B breakers
OFF
at the AC load center and switch the 40A battery breakers
OFF
at the DC distribution panel, then perform the procedure.
To replace a DC circuit breaker
1.
At the DC distribution panel, verify that the breaker to replace is
OFF
.
2.
Remove the cover from the DC distribution panel.
3.
Remove the identified circuit breaker from the housing. The breaker pulls straight out
with no connected wiring.
WARNING!
Risk of electric shock. Set the new breaker to the
OFF
position before installing it.
4.
Install the new breaker into the vacated housing position.
5.
Replace the cover on the DC distribution panel.
