Enphase Energy HCS-D Serie Manual De Instrucciones página 15

NOTE: With a wye-connected secondary, any two of
the legs can be used to provide 208V to the HCS-D. For
example, L1 & L2, or L1 & L3, or L2 & L3. Leave the
unused leg open. Do not connect it to a Neutral bar, or
to Ground. Be sure the center point is grounded to Earth
somewhere in the system.
Figure 4: 240V 3-Phase, Delta-Connected, w/Center-Tap on
One Leg
CAUTION: With the delta connection, one leg must be
center-tapped. Only the two phases on either side of the
center tap can be used. The two phases must both measure
120V to Neutral. The third line (L3) of the delta is 208V,
with respect to Neutral, and is sometimes referred to
as a "stinger". Do not use this third line! Consult the
transformer manufacturer's literature to be sure the single
leg can supply the required power.
L3 (DO NOT USE!)
120V
NEUTRAL
(NOT USED)
120V
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HCS-D User Manual
L1
240V
L2
GROUND