Page
54
to
71
External Sync kit
In order to synchronise the inverter output to an external source, a
synchronisation kit is available. This kit contains an isolated single-phase low
voltage output transformer (SELV).
Connect the transformer secondary to the "EXT SYNC" terminal block
(marked as 1 and 2) in the power connections area (refer to the “Power
connection details” paragraph of the Installation manual for further information)
using a double insulated cable with a 1mmsq cross-section.
Make sure the polarity is respected as shown in the figure.
After installation, enable the control using the configuration software.
For EMI issues, keep the cable length as short as possible (suggested 25 mt maximum). If extended length is required,
please contact your local service centre.
Internal transformer
THE OT (OPTIONAL) VERSION OF THE UPS SERIES DIFFERS FROM THE STANDARD VERSION IN THAT IT
INCLUDES AN ISOLATION TRANSFORMER INSTEAD OF THE INTERNAL BATTERIES.
This series of UPS (available only in a dedicated chassis of the XTEND – XTD version), is equipped with an
isolation transformer connected to the UPS output terminals.
NOTE:
A Dual Input line is present as standard on this UPS version.
The transformer is connected to the UPS output terminals, so the values displayed are those of the
quantities measured upstream of the transformer.
The presence of the transformer inside the UPS modifies the system neutral arrangements.
The installation of a remote maintenance bypass switch which is parallel to the UPS is incompatible with
the inclusion of the transformer. In any event, if the remote maintenance bypass is inserted, make sure, at
the time when the remote bypass switch is closed, that the UPS is isolated from the system by opening
the input and/or output switches.
The UPS version with an internal transformer is supplied with a neutral on the secondary circuit which is
NOT
connected to earth. It must be bound to earth according with the neutral arrangements on the site.
Transformer Vector Group is YNyn0.
ATTENTION:
Manual By-pass changeover operation does not isolate the transformer inside the UPS and so it
will continue to supply the load; All personnel operating inside the UPS should be aware that
under these conditions some part are subjected to dangerous voltages.
