Legrand TRIMOD HE 15 kVA [9/14] Inverter stopping in a power module

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Bypass activation, based on the length of time "loss of voltage" on the output lasts, can be regulated by

the user in discrete steps so as to facilitate use of UPS together with equipment characterized by frequent

surge currents. This adjustment can be carried out by the user from the front panel or by means of the

diagnostic software installed on an external PC.

4.2.4

Inverter stopping in a Power Module

The modular architecture, with N+X redundant configuration, allows energy to be supplied to the load

even if the inverter of a power module stops.

The nominal power represented by the sum of the functional modules can always be supplied to the user,

which can work at reduced load or full load in the case of a redundant configuration. The inverter stopped

condition is detected by the monitoring logic, is transmitted to the microprocessor and is then signaled to

the user on the frontal display or via software. Each power module also has a LED that immediately

signals its operating status. This allows the damaged module to be immediately identified and facilitates

the replacement operations.

4.3 Emergency condition (Mains failure)

In a blackout, or if the electricity main values are off range, the users are powered by the batteries via

the booster-inverter pathway. The batteries function in discharged conditions in this operating mode.

The UPS informs the user about this operating status with clear visual and acoustic signals.

Thanks to a diagnostic-predictive algorithm, the microprocessor control can calculate the available

residual runtime depending on the instantaneously applied load. This runtime is shown on the frontal

display of the unit with a reasonable degree of accuracy.

4.4 After a blackout

When the electricity Mains power returns within the tolerated limits after a voltage drop or a blackout,

the UPS automatically returns to operate in normal service conditions absorbing electricity from the

Main.

Even after the end of autonomy, at the return of the Mains the battery charger automatically start to

charge batteries.

4.5 Smart Eco Mode

In order to save Energy in particular conditions the UPS must be easily set by the user to run in Eco

Mode. In this running mode the load is directly connected to the utility. In the mean time the UPS is

continuously checking the mains Energy supply, as soon the input Energy is out of tolerance, the UPS

immediately switches in on line mode.

4.6 Cold Start

The UPS must be able to be strat up without the input mains, just using batteries (Cold Start Function).

4.7 Start Up on Bypass

The UPS must be able to connect the load directly on bypass during the strat up (start up on bypass) and

then connect the load to the inverter output when the inverter is full syncrhonised with the input Mains.

4.8 Maintenance Bypass

The UPS will be equipped with a manual maintenance bypass to allow the service and the access to

modules and battery, keeping the load powered. The maintenance bypass can activated manually and

must be protected by a door locked with a key.

A disconnectors system must isolate the internal parts of the UPS from any energy source allowing the

UPS maintenance, service and acces to modules without danger.