26
in the worst case, the following deviations have to be strictly re-
spected:
when the distance among the UPSs and protection panel is
lower than 20 metres, the difference in the length between
the input and output cables of the equipments has to be
lower than 20%.
when the distance among the UPSs and the protection
panel is higher than 20 metres, the difference in the length
between the input and output cables of the equipments has
to be lower than 10% .
input circuit breakers
output circuit breakers
M
an
ua
l b
yp
ass
UPS nr 1
input
To loads
UPS nr 2
Fig. 16. Parallel installation of two KESSUPS 91RT UPSs from 4 to 10
kVA, with protection and manual bypass panel.
UPS nr 1
UPS nr 2
input and bypass circuit breakers
output circuit breakers
M
an
ua
l b
yp
ass
input
To loads
bypass line
Fig. 17. Parallel installation of two KESSUPS 91RT UPSs from 4 to 10
kVA, with bypass line and protection and manual bypass
panel.
