User`s manual

UPS EVO DSP TT 25 User’s manual
9 After completing the configuration of the name of each UPS and N value, switch on the Input
circuit breaker (F1), then Bypass circuit breaker (F4) (if the UPS is split Bypass version) and Inrush
circuit breaker (F6) respectively on each Parallel UPS.
After seeing “NORMAL” message on the LCD panel, Battery circuit breaker (F5) can be switched on.
Then the Output circuit breaker (F2) can be switched on accordingly.
The Parallel System (all UPSs in parallel configuration) will start operating from static Bypass
initially, and then they will start supplying the load from Inverter.
10 The initially started up UPS will operate as master and the remaining UPSs will operate as slave.
According the numbers defined for each ups, on the LCD panel, MAS (master) and SLAVE (1, 2, 3, 4)
messages should be observed. On the master unit, candidate master UPS is also shown as CX.
CX represents the best available master candidate UPS among the slave UPSs and X represents the
number of the slave UPS. In case the master UPS fails, then this candidate assigned UPS becomes
master.
6.3 Procedure for Transferring to Static Bypass
In case it is required to transfer the Parallel System to Static Bypass, then this process can be made
from the LCD panel of any UPS in the Parallel System. In case static Bypass is activated on any UPS, all
the UPSs will pass to Static Bypass mode at the same time.
In order to transfer to static Bypass mode, from the LCD panel menu, go to “COMMANDS” menu and
then go to “EXTENDED CMNDS” submenu.
Select “SYS. TO BYP” and confirm “ENBLD” command by pressing ENTER key. If ENTER key is pressed
again from any UPS of the Parallel System (does not need to be done from the UPS where it was
enabled at the first time), then the selection will be changed to “DSBLD” (Static Bypass disabled, again
Inverter operation starts).
6.4 Procedure for Transferring to (Maintenance) Manual Bypass
In case it is required to transfer the Parallel System to Manual Bypass, then this process can be made
from any UPS of the Parallel System. In case Manual Bypass is activated on any one of the UPS, all the
UPSs will pass to Manual Bypass mode at the same time.
In order to activate the Maintenance Manual Bypass, it is enough to switch on the Maintenance Bypass
breaker (F3) on any UPS.
To go back to Inverter operation again, it is necessary to switch off the manual Bypass circuit breaker
(F3) of the UPS which was switched to on position in the first place.
6.5 Procedure for Switching OFF
To switch off the Parallel System or one of the UPSs, follow the procedure below;
1 Bring the Battery circuit breaker (F5) to “OFF”/“0” position.
2 Bring the Output circuit breaker (F2) to “OFF”/“0” position.
3 Bring the Input circuit breaker (F1) to “OFF”/“0” position.
4 Bring the Inrush circuit breaker (F6) to “OFF”/“0” position.
5 Bring the Bypass circuit breaker (F4) to “OFF”/“0” position, if it exists.
Now the UPS or UPSs can be separated from the Parallel System.