
OMD10078 rev F
18
2.4
MANUAL BYPASS
The manual bypass operation is necessary every time the functionality of the UPS
needs to be checked or during maintenance or repair works.
The manual bypass procedure is described in the UPS operating manual and must
be followed carefully in order to avoid damages to the UPS.
During the functional check of the UPS, all the breakers can be closed, except for the
output breaker OCB, and the full functionality can be tested.
Picture 16 – Manual Bypass for functional tests
During the manual bypass operation for repair or maintenance, the UPS is
completely switched off and the load is supplied directly by the bypass mains.
Picture 17 – Manual Bypass for repair or maintenance works