S
EPARATE BYPASS INPUT
DI
THE OPTIONAL
VERSION OF THE UPS SERIES HAS SEPARATE BYPASS AND INPUT LINES.
The UPS series with Separate Bypass allows a separate connection between the input and the bypass lines.
The UPS output is synchronised with the bypass line, in order to avoid incorrect voltage changeovers during the alternate phases,
in case an automatic bypass or a maintenance isolator closure occurs.
I
T
NTERNAL
RANSFORMER
OT
THE
(OPTIONAL) VERSION OF THE UPS SERIES DIFFERS FROM THE STANDARD VERSION IN THAT IT USES AN
ISOLATION TRANSFORMER INSTEAD OF THE BATTERIES.
This series of UPS uses an isolation transformer connected to the UPS output terminals.
NOTE: A separate bypass line is supplied 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 parallel to the UPS is incompatible with inclusion of the
transformer. In any event, if the remote maintenance bypass is inserted, make sure, at the time the remote bypass
switch is closed, that the UPS is isolated from the system by opening the input and/or output switches.
UPS version with internal transformer is supplied with neutral on secondary circuit not connected to earth. It shall
be bind to earth according with neutral arrangement on the site.
ATTENTION:
Manual By-pass change over operation does not insulate the transformer inside which continue to supply
the load; the personnel operating inside the UPS should be aware that under these conditions some part
are subjected to dangerous voltages
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OPTIONAL
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OPTIONAL
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