SMARTZONE UPS USER MANUAL
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8. The rectifier will start operating normally after 30 seconds. If the inverter is
working normally, the system will automatically switch from internal Bypass state
to Normal state.
Shutting Down the UPS
CAUTION
! This procedure should be followed to completely shut down the UPS
and the Load. Not until all power switches, isolators and circuit breakers are opened
will there be no output.
1. Switch OFF the Battery breakers on all the EBP units connected to the system.
2. Switch OFF (from up to down) the MAINS breaker on the MBS. If there is no
MBS, then the breaker must be switched OFF at the power distribution panel,
feeding the main input to the UPS unit.
3. Switch OFF (from up to down) the BYPASS breaker on the MBS. If there is no
MBS, then the breaker must be switched OFF at the power distribution panel,
feeding the bypass input of the UPS unit. The UPS shuts down.
4. Switch OFF (from up to down) the OUTPUT breaker on the MBS if one is in the
system. This will isolate the load bus from the UPS unit.
5. To completely isolate the UPS from AC Input Main, the user either needs an
MBS unit that is operating in Maintenance Bypass state, or all input breakers
(Main and Bypass) in the power distribution panel from the utility shall be turned
OFF, and a lockout tagout device should be placed on the power distribution
panel feeding the UPS.
Note:
Wait for about 30 minutes for the internal DC bus capacitors to be completely discharged,
before opening the UPS enclosure for period maintenance by qualified personnel.
