Eaton Power Xpert 9395 550/275 Installation And Operation Manual page 67

UPS System Installation
HIGH IMPEDANCE GROUND SOURCES - If the supply source is a high impedance ground (IT) type, the input
neutral conductor must be connected from the source of supply. If there is no output neutral connected to the
UPS, the neutral–forming transformer kit may be used instead of pulling a neutral from the source. If the load
requires a neutral, then an input neutral conductor must be pulled into the UPS. In no circumstances shall a
neutral to ground bonding jumper be installed in the UPS.
Use the procedures in the following paragraphs to connect the external and battery power wiring.
4 4 . . 6 6 . . 1 1 2 2 – – H H o o l l e e B B a a r r r r e e l l L L u u g g T T e e r r m m i i n n a a t t i i o o n n s s t t o o B B u u s s B B a a r r I I n n s s t t a a l l l l a a t t i i o o n n
4.6.2 External Power Wiring Installation
battery power wiring using 2-hole barrel lugs. See
to the bus bars. Tighten the nut to the torque value listed in
NOTE
Figure 13. Typical Bus Bar Barrel Lug Mounting – Hardware Assembly Sequence
4 4 . . 6 6 . . 2 2 E E x x t t e e r r n n a a l l P P o o w w e e r r W W i i r r i i n n g g I I n n s s t t a a l l l l a a t t i i o o n n
To install wiring to connections:
46 Eaton Power Xpert 9395 UPS Installation and Operation Manual 164201716—Rev 14
and 4.6.3 Battery Power Wiring
Conical washers are special purpose washers that look similar to flat washers, except
for a slight conical shape. When installing conical washers, the top of the dome should
be next to the nut and the base of the washer should be against a flat surface such as a
bus bar, flat washer, or large terminal.
Single Lug Installation
Double Lug Installation
require connecting input, output, and
Figure 13 for the hardware sequence when installing the lugs
Table 11.
Hex Nut
Conical Washer
Flat Washer
Lug
Bus Bar
Flat Washer
Bolt Head
Hex Nut
Conical Washer
Flat Washer
Lug
Bus Bar
Lug
Flat Washer
Bolt Head