240V 3-Phase Delta Connection (North America) With Center Tap On One Leg - SPX Power Xpress Installation Manual

240V 3-Phase Delta Connection (North
America) with Center Tap on One Leg
One leg must be center-tapped, and only the two
phases on either side of the center tap can be used
with the delta connection.
L2
CENTER TAP
Figure 3. 240V 3-Phase Delta Connection
8
Power Xpress™ Bollard Charge Station
L3 (NOT USED)
L1
L1
120V
240V
NEUTRAL
(NOT USED)
120V
L2
GND
NOTE: The third line (L3 on the illustration of the
delta) is 208V, with respect to the neutral,
and is sometimes referred to as a "stinger."
WARNING: Do not use this third line.
NOTE: The two used phases must each measure
120V to neutral or ground.
NOTE: Consult the utility company or the trans-
former manufacturer's literature to verify
that the single leg can supply the required
power.
NOTE: The EVSE will only operate properly if it de-
tects the presence of a ground wire con-
nected to a neutral point on the transformer
secondary.
WARNING: Do not use a 3-phase delta-
connected transformer
without a center tap on one leg and/or
without a neutral point available for the
required ground connection.
Installation Guide
secondary
EL-50600-17 Rev. A