Aplus PlusIII-10KLRB, User Manual

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tocheck if the voltage difference between them is less than 0.5V.If the difference is
more than 0.5V, the UPSsneed to be regulated.
12) Press the button of one UPS, each UPS would start to turn off andtransfer to the
Bypass mode, switch on the output breaker of each UPS to parallel all theoutput of
UPSs together
13) Press the button of one UPS, each UPS would start to turn on, after turningon,the
UPSs should work parallel in the Line mode.
How to join a new UPS to a parallel system:
1) First the parallel system must be installed one main maintenance mechanical switch or
static switch.
2) Regulate the output voltage of the new UPS separately: check if the output voltage
difference between the new UPS and the parallel system is less than 0.5V.
3) Ensure the bypass of the parallel system is
normal and the bypass setting is “enable”,
remove the cover plate of maintenance switch on the rear panel of each UPS, the UPS
system would transfer to bypass automatically, set the own maintenance switch of each
UPS from “UPS” to “BPS”.
4)
Set the main main
tenance switch or static switch from “UPS” to “BPS”, switch off the
main output breaker and the main input breaker, the UPSs would shut down.
5) Ensure the UPSs shut down totally, add the new UPS and reinstall the new UPS
parallel system by following step 1) to 9) of last chapter -
“install a new parallel UPS
system”.
6) Switch on the main input breaker and the main output breaker, and set the main
maintenance switch or static switch from “BPS” to “UPS”, then set the UPS own
maintenance switch from “BPS” to “UPS” and screw the maintenance cover plate back
again. Press the button of one UPS, each UPS would start to turn on, after turning
on, the UPSs should work parallel in the Line mode.
How to remove a single UPS from a parallel system:
1) First the parallel system must be installed one main maintenance mechanical switch or
static switch.
2)
Ensure the bypass is normal and the bypass setting is “enable”, remove the cover plate
of maintenance switch on the rear panel of each UPS, the UPS system would transfer
to bypass automatically, set the own maintenance switch of each UPS from “UPS” to
“BPS”.