Enphase Energy HCS-D Serie Manual De Instrucciones página 16

HCS-D User Manual
CAUTION: A 3-phase delta-connected transformer
secondary without a center-tap on one leg cannot be
used with the HCS-D. No "Neutral" point is available to
be connected to ground for ground-fault protection. The
HCS-D will not allow the contactor to close if it does
not sense the presence of a Ground wire connected to a
"Neutral" point on the transformer secondary.
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