SECTION II
Installation
Page 2.11
BP+10-150
12/95
2.8 Power Connections (continued)
5.
Bypass Input Voltage Configuration (Dual Input UPS)
Bypass input voltage configuration must be the same voltage, frequency,
phase sequence and configuration as the UPS ac voltage configuration, i.e., 3-
phase, 4-wire plus ground. The UPS output can feed WYE (4-wire) loads or DELTA
(3-wire) loads: WYE systems require neutral connections for both bypass input and
UPS output; DELTA or 3-wire systems require neutral connection for bypass input
only.
6.
Ground Connections
Two 3/8-16 x 1.0 LG ground studs are provided for connection to system
ground. Ground studs are welded to the cabinet frame and are located near the
cable entry points or power terminal.
7.
Replace the panel around the circuit breakers (removed in Paragraph
2.2,
Step 3). (With top cable entry option, replace right side panel removed in
Paragraph 2.2, Step 4.)
2.9 Activating the Battery Cabinet(s)
WARNING
This procedure should be performed only by
qualified electrical personnel Due to potential
for arcing, safety equipment such as face shield
or eye goggles and gloves must be worn at all
times. All tools must be insulated. There will be
high voltages present and failure to follow this
procedure exactly may lead to injury or death.
•
Make sure that all electrical power has been removed from the
UPS and battery cabinets.
•
Make sure that battery tray cables are
not
plugged together.
