enphase HCS EVSE Serie Manual De Usuario página 14

HCS EVSE User Manual
CAUTION: This is a single-phase device. Do not connect
all three phases of a 3-phase feed! You may use any two
phases of a three phase wye-transformer feed. The
centerpoint of the three phases (usually used as Neutral)
must be grounded somewhere in the system. A Neutral
connection is not required by the EVSE. Only Line 1, Line
2, and Ground are required, as shown in Figure 3.
CAUTION: The two phases used must each measure 120V
to Neutral. Earth Ground must be connected to Neutral at
only one point, usually at the service entry breaker panel.
CAUTION: If a 240V 3-phase feed is from a Delta-
connected secondary, the leg used must have a center-tap.
That tap must be Grounded. Only the two phases on either
side of the center-tapped leg can be used. See Figure 4.
CAUTION: Warranty is void if this unit is not wired
properly.
WARNING: Only a qualified electrician should perform
the installation. The installation must be performed in
accordance with all local electrical codes and ordinances.
Only 3 wires are connected, but care must be taken that the service
transformer secondary connection is definitely known, and the
3 wires from the main circuit breaker panel are connected and
labeled correctly. Figures 2, 3, and 4 show the most common
service transformer secondary wiring formats.
Notice that L1, L2, & Ground are labeled on each diagram. Those
transformer outputs correspond to the same inputs on the HCS.
Also, each of the two 3-phase diagrams shows an L3 output, which
is not used. Do not connect all three phases of a 3-phase secondary
to the EVSE. This is a single-phase device.
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