S
B
EPARATE
YPASS
DI
THE
(OPTIONAL) VERSION OF THE UPS SERIES HAS SEPARATE BYPASS AND INPUT LINES.
The UPS series with separate Bypass ensures a separate connection between the input and bypass lines.
The UPS output is synchronised with the bypass line so as to safeguard against incorrect voltage changeovers in the
alternate phases, in the event of automatic bypass or closing of the maintenance switch (SWMB).
A
I
DDITIONAL
NTERNAL
The additional internal battery charger cards are powered directly on mains power and have pseudo-sinusoidal wave
form absorption.
If the input switch is closed but the I/O switch is open (UPS switched off) the battery chargers operate
independently. Open the input switch (SWIN) to totally shutdown the UPS and the additional battery chargers.
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.
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
I
(
NPUT
OPTIONAL
B
C
ATTERY
HARGERS
(
OPTIONAL
- 62 -
)
)