Thomas & Betts 9395 - Manual (Page 25)

UPS 225 - 275 kVA
User’s and Installation Guide
1027212
Revision B 25
3.4 Installing UPS external and battery power wiring
NOTE
The UPS cabinet is shipped with a debris shield covering the ventilation grill on top of the
unit. Do not remove the debris shield until installation is complete. However, remove the
shield before operating the UPS. Once the debris shield is removed, do not place objects on
the ventilation grill.
NOTE
Remove the UPS cabinet top or bottom conduit landing plate to drill or punch conduit holes
(see Figure 3-3).
NOTE
If the load requires a neutral, a bypass source neutral must be provided. If the load does not
require a neutral and there is no neutral conductor connected at the bypass input, a neutral
to ground bonding jumper must be installed. DO NOT install both a source neutral and a
bonding jumper. See Table 2-4 on page 15 for neutral bonding jumper wire sizes. Bonding
jumper must be copper wire.
Use the procedures in the following paragraphs to connect the external and battery power
wiring.
3.4.1 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
3-1). Lift the panel straight up to remove from the panel hanger bracket at the top of the
cabinet.
2. Route the input and output cables through either the top or bottom of the cabinet to
the UPS terminals. See Figure 3-3 through Figure 3-5 for wiring access information and
terminal locations.
3. Connect phase L1, L2, and L3 (E1, E2, E3), rectifier input power wiring from the utility
source to the rectifier input terminals in the UPS cabinet. See paragraph 2.2.2 on page 14
for wiring and termination requirements.
4. Connect phase L1, L2, and L3 (E6, E7, E8), and Neutral (if required) bypass input power
wiring from the utility source to the bypass input terminals and neutral terminals in the
UPS cabinet. See paragraph 2.2.2 on page 14 for wiring and termination requirements.
5. Connect phase L1, L2, and L3 (E9, E10, E11), and Neutral (if required) power wiring from
output terminals and neutral terminals to the critical load. See paragraph 2.2.2 on page 14
for wiring and termination requirements.
6. Proceed to paragraph 3.4.2.