Legrand TRIMOD HE 60 kVA [5/14] X n p p

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2.4 Scalabilty

The modularity of the UPS must allow to increase the back-up time on site, simply adding battery

drawers. The upgrade will not require factory modifications and will not need dedicated special tools.

2.5 Architetture

The architecture of the UPS must be parallel distributed, to be more precise, the load will be shared

between all power modules in each phase. In this way, during normal run, no power module is inactive or

in standby. In a redundant configuration, if one moduel fails all the others ones will take the relevant load

without any interruptions or transfer time at the output of the UPS. In case one module failure the power

is guaranteed by the others modules and the supplied power will been s follows:

nomout

)( −

in single phase configuration

and

nomout

)3( −

in three phase configuration

where

•

nom

is the nominal power of the UPS;

• is the power supplied by the UPS with one module out of order;

•

is the number of installed power modules inside the UPS;

• x is the number of power modules out of order;

out