ABB PowerValue 11/31 T Operating Manual page 34

4. Set the own maintenance switch of each UPS from "UPS" to "BPS".
5. Switch off the main output breaker and the main input breaker. The UPS will shut down.
6. Check that that there is no current in the output and that the UPS is switched off.
7. Add the new UPS and reinstall the new UPS parallel system by following steps 1-7 of section
4.2.2.2.
8. Switch on the main input breaker and the main output breaker, and set the main maintenance
switch or static switch from "BPS" to "UPS".
9. Set the UPS own maintenance switch from "BPS" to "UPS" and screw the maintenance cover plate
back again.
10. Press the power-on button of one UPS. Each UPS will start up and all UPSs will run in parallel in
online mode.
How to remove a single UPS from a parallel system:
Note: The parallel system must have a main maintenance mechanical switch or static switch according
to Figure 15.
1. Ensure that the bypass is working and that he bypass setting is "enabled".
2. Remove the cover plate of maintenance switch on the rear panel of each UPS. The UPS system will
transfer to bypass automatically.
3. Set the own maintenance switch of each UPS from "UPS" to "BPS".
4. Switch-off the main output breaker and the main input breaker. The UPSs will shutdown.
5. Check that that there is no current in the output and that the UPS is switched off.
6. Remove the UPS and reinstall the new UPS parallel system by following steps 1-7 of section 4.2.2.2.
7. If the removed or the remained UPS are then used in a standalone configuration, JP1 and JP2 on
the terminal block should be connected with a short connection wire.
8. Switch on the main input breaker/switch and the main output breaker/switch.
9. Set the main maintenance switch or static switch from "BPS" to "UPS" and screw the maintenance
cover plate back to the UPS.
10. Press the power-on button of one UPS. Each UPS will start-up and all UPSs will run in parallel in
online mode.
Modifications reserved
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