SECTION II
Installation
Page 2.10
BP+10-150
12/95
2.8 AC Power Connection (continued)
3. a.
UPS Input Voltage Configuration (continued)
Note: When connecting the UPS to a 3-phase, 3-wire supply, the supply
transformer must be a 3-phase, center grounded WYE and the ground conductor
must be connected to the UPS ground terminal. The neutral must be grounded
and the UPS can only supply power to 3-phase, 3-wire loads. No single-phase
loads can be connected to the UPS. For any other configurations consult IPM
Application Engineering.
b.
On a single input UPS, when input voltage does not equal output
voltage and on a dual input UPS
—
3-phase, 3-wire plus ground.
Note: The UPS 3-phase, 3-wire supply transformer must be a 3-phase,
center grounded WYE with neutral grounded. The ground connector must be
connected to the UPS ground terminal. For any other configurations, consult IPM
Applications Engineering.
4. UPS Output Voltage Configuration.
Referring to the installation drawings in this section, connect UPS output
terminals to the equipment to be protected, running the cables out through the
access panel.
a.
On a single input UPS, when input voltage equals output voltage,
and on a dual input UPS
—
3-phase, 4-wire plus ground can feed WYE-connected or
DELTA-connected loads (see Note at 3,a, above).
b.
On a single input UPS, when input voltage does not equal output
voltage
—
3-phase, 4-wire plus ground; can feed WYE-connected or DELTA-
connected loads.
Note: This configuration provides a separately derived source. UPS output
neutral has been factory connected to system ground. UPS output circuit
protection is required.
