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5.4. Manual Bypass Operation
Manual Bypass enables the user to isolate the electronic circuitry of the UPS from the mains and
the load without interrupting the load operation by connecting the loads directly to the bypass
utility
supply. This feature is useful while performing maintenance or service and should only be
executed by authorized technical service personnel.
When installing external maintenance bypass breaker please make sure that auxiliary contact
information carrier cable is connected in parallel to internal maintenance bypass auxiliary
contacts. And please use twisted and shielded cable for this transmission
.
This procedure may only be executed by authorized Technical Service personnel.
Some parts inside the UPS (terminals, EMC filters and measurement circuits) are still
energized during Maintenance Bypass Operation. In order to deenergize all UPS parts, circuit
breakers on mains and bypass mains distribution panels feeding the UPS and circuit breakers
on external battery cabinet shall be brought to “OFF” position. Internal batteries should also
be isolated from the system.
During Manual Bypass operation; in case of any mains interruption occurs, all loads on the
output will be deenergized. Manual Bypass Operation should not be preferred for long time
use.
Summary of Contents for PDSP 33010
Page 17: ...12 80kVA Terminal Connections Separate Bypass Terminal Bypass L1 L2 L3 N version is optional...
Page 18: ...13 100kVA Terminal Connections Separate Bypass Terminal Bypass L1 L2 L3 N version is optional...
Page 19: ...14 120kVA Terminal Connections Separate Bypass Terminal Bypass L1 L2 L3 N version is optional...