4.4
External Power Wiring
Installation
To install wiring:
1. Route the wiring to the UPS terminal blocks in the UPS. Figure 4-4 for wiring
access
information
and terminal
locations.
2. Ground the UPS
according
to local and/or national electrical wiring
codes
by routing and
connecting
the
ground wire to the input ground
lug
.
3.
Connect phase
A, B and C rectifier input
power
wiring from the utility
source
to the rectifier input,
See
paragraph
3.2.2 for wiring and
termination
requirements.
4.
Bypass
input
power
wiring from the utility
source
to the
bypass
input
terminals
and neutral
terminals.
See
paragraph
3.2.2 for wiring and
termination
requirements.
5.
Connect phase
A, B and C
power
wiring from
output terminals
to the critical load. See
paragraph
3.2.2 f
or
wiring and
termination
requirements.
6. Mains input N ,
Output
N and
Bypass
input N are
connected together
inside
UPS
.
7. If wiring
interface connections, proceed
to
paragraph
4.5.
W
ARNING
•
HIGH
TOUCH CURRENT.
EARTH
CONNECTION
ESSENTIAL
BEFORE CONNECTING
SUPPLY.
As
a result of the
connected
loads high
leakage current
is
possible. Connection
of
the
earth (ground) is
required
for proper
product operation.
Do not check UPS
operation b
y
removal of the Earth (ground)
connection.
•
If a 4 pole
A
utomatic
Transfer Switch (ATS) is installed
upstream
of the UPS, ensure that ATS
switching will not break the Neutral line.
•
BAT+/BAT-
are
terminals connected
to the
battery cabinet, Battery+
polarity should use
red
cable,
battery
-
polarity should use black or blue
cable.
•
This device may not be fitted with an optional internal mains
disconnection
device. If
not
fitted, it is
essential
that the
customer
install such a device at the installation site near
the
UPS
.
•
Input neutral line should be directly
connected
to input “N” terminal of UPS wire
connection
terminal bay
without
AC input idle-r
un.
•
There are
protective earthing terminals
within the UPS for mains supply, load supply
and
bat
ter
y
.
The
battery cabinet
earth
protection
can be
connected
either to the UPS or to
a
common earthing
terminal
outside
the
UPS
.
Eaton 93E MK2 UPS (10-40kVA, 380/400/415V) Installation and Operation
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