External Power Wiring Installation; Figure 4-3. Typical Bus Bar Barrel Lug Mounting - Hardware Assembly Sequence - Eaton Power Xpert 9395 550/275 Installation And Operation Manual

UPS System Installation
Use the procedures in the following paragraphs to connect the external and battery power wiring.
4.6.1 2Hole Barrel Lug Terminations to Bus Bar Installation
Paragraphs 4.6.2 and 4.6.3 require connecting input, output, and battery power wiring using 2-hole barrel lugs.
See Figure 4-3 for the hardware sequence when installing the lugs to the bus bars. Tighten the nut to the
torque value listed in Table 3-10.
NOTE
Figure 4-3. Typical Bus Bar Barrel Lug Mounting – Hardware Assembly Sequence
4.6.2

External Power Wiring Installation

To install wiring to connections:
1. Remove one top screw and two bottom screws securing the UPS left front panel (see Figure 4-2). Lift the
panel straight up to remove it from the panel hanger bracket at the top of the cabinet.
2. Remove the screws securing the internal safety shield panel and remove the panel to gain access to the
input, output, and battery terminals. Retain the hardware for later use.
3. Route the input and output cables through either the top or bottom of the cabinet to the UPS terminals.
See Figure 4-4 for wiring access information and Figure 4-5 and Figure 4-6 for common rectifier feed
terminal locations or Figure 4-7 through Figure 4-9 for separate rectifier feed terminal locations.
TM
4-6 Power Xpert
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
9395 550/275 UPS (225–550 kVA) Installation and Operation Manual 164201716—Rev 8 www.eaton.com/powerquality
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