UPS
Installation Plan and Unpacking
•
The
bypass
feed into this
equipment uses
four wires (three line
conductors
and neutral
conductor), plus
grounding
conductor (protective earthing conductor)
.
The rectifier feed into this
equipment uses
four
wires
(three line
conductors
and neutral
conductor),
plus
grounding conductor (protective earthing conductor).
T
he phases must
be
symmetrical
about ground (from a
Wye/Star source)
for proper
equipment operation.
•
Parallel UPS input wiring size
requirements
and
output
wiring size
requirements
from the UPSs to the Tie
Cabinet are the
same
as
those
for single
sy
stems.
•
Install a proper
three-pole overcurrent disconnect
device
before connecting
to the UPS, the
disconnect
device
shall
disconnect simultaneously
all line
conductors
of the AC MAINS
SUPP
L
Y
.
•
MBS
(Maintenance bypass
switch) is installed inside the UPS. When
maintaining,
open neutral
switch and
MBS to
isolation the UPS internal parts from the utility. Do not open neutral
switch
in any other
cases
because
the neutral is
required
for UPS
operation.
•
If a
disconnect
device
interrupts
the neutral
conductor,
it shall
simultaneously interrupt
all line
conductors.
•
When
single-phase current exceeds
100A,
switches
of
protective atmosphere
should be
equipped with
arc-
control
de
vice.
•
The UPS
requires
an input neutral
connection. Ensure
that an input neutral is
connected
prior to
energizing
the UPS.
If a 4 pole
A
utomatic
Transfer Switch is installed
upstream
of the UPS it
must
work with a
break
before
make
transition
with a
minimum transfer
time of
50ms.
Figure 4-4
shows P
ower
terminal location 10/15/20/30 kVA
Figure 4-5
shows P
ower
terminal location 40 kVA
Eaton 93E MK2 UPS (10-40kVA, 380/400/415V) Installation and Operation
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