Figure 4-17. Typical Bus Bar Barrel Lug Mounting - Hardware Assembly Sequence - Eaton Power Xpert 825/550 Installation And Operation Manual

4.8.1
t
Power Xpert 9395 UPS (450–825 kVA) Installation and Operation Manual
DELTA SOURCES (TN‐S) - The UPS cannot be operated from a mid‐point or end‐point grounded delta supply
source. With this type of supply source, there is no capability to provide an output neutral. 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.
2‐Hole Barrel Lug Terminations to Bus Bar Installation
Paragraphs 4.8.2 and 4.8.3 require connecting input, output, and battery power wiring
using 2-hole barrel lugs. See Figure 4‐17 for the hardware sequence when installing
the lugs to the bus bars. Tighten the nut to the torque value listed in Table 3‐12.
NOTE 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.
Figure 4‐17. Typical Bus Bar Barrel Lug Mounting – Hardware Assembly Sequence
C A U T I O N
Single Lug Installation
Double Lug Installation
S
www.eaton.com/powerquality
164201725 Rev 9
UPS SYSTEM INSTALLATION
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
4-19