UPS Electrical Installation
15
Liebert
®
e
XL
™
2.6
No CB2 Option
Figure 4
No CB2 option
If a module does not have the inverter output breaker CB2, an overcurrent protection device with a
manual disconnect must be supplied by others in a readily accessible location.
This overcurrent protection device must be appropriately sized. See
for rated module output
current. For system breaker coordination, see
through
for the overload capabilities of
the modules.
2.7
Internal Breaker Settings
All internal breakers—CB1, CB2 and BFB—were installed and set at the factory.
NOTICE
Risk of incorrect adjustment. Can cause equipment damage.
Factory circuit breaker settings must not be altered without contacting Emerson Network
Power
®
customer support.
NOTE
This option does not allow the Liebert
e
XL module to be isolated from critical load. Emerson
recommends installing a wraparound maintenance bypass. If a wraparound bypass is not
installed, according to the latest OSHA safety regulations, the output of the module may need
to be shut down to maintain the module.
FBO
FBO
Critical Load
UPS Module
Maintenance Bypass
3-Wire + GND
AC Output
3-Wire + GND
