33
than 0.5V. If the difference is more than 0.5V, the UPS need to be regulated.
10) Press the button of one UPS, each UPS would start to turn off and
transfer to the Bypass mode, switch on the output breaker of each UPS to
parallel all the output of UPS together.
11) Press the button of one UPS, each UPS would start to turn on , after
turning on, the UPS should work parallel in the Line mod
How to join a new UPS to a parallel system:
1) First the parallel system must be installed one main maintenance bypass
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
"
, Press the button of one UPS, each UPS would turn off and the
UPS system would transfer to the Bypass mode.
4) Set the main maintenance bypass switch from
"
UPS
"
to
"
BPS
"
, switch off the
main output breaker and the main input breaker, the UPS would shut down.
5) Ensure the UPS shut down totally, add the new UPS and reinstall the new
UPS parallel system by following step 1) to 10) of last chapter -
"
How to install
a new parallel UPS system
"
.
6) Switch on the main input breaker and the main output breaker, and set the
main maintenance bypass switch from
"
BPS
"
to
"
UPS
"
, Press the button
of one UPS, each UPS would start to turn on, after turning on, the UPS 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 bypass
switch.
2) Ensure the bypass of the parallel system is normal and the bypass setting is
"
enable
"
, Press the button of one UPS, each UPS would turn off and the
UPS system would transfer to the Bypass mode.
3) Set the main maintenance bypass switch from
"
UPS
"
to
"
BPS
"
, switch off the
main output breaker and the main input breaker, the UPS would shut down.
4) Ensure the UPS shut down totally, remove the wanted UPS and reinstall the
new UPS parallel system by following step 1) to 10) of last chapter -
"
How to
