Install Manual

AC Module System Installation Manual
Rev. 1.0
To form balanced three phases, it is recommended to use 3-array and equal to the number of AC modules in each array .
There is one of samples for AC output cables connection of three phase 208VAC below.
Step 1. Check your distribution panel for figuring out what type of AC distribution system you have. Use a volt-meter to
find out the phase and line-to-line voltage across L1, L2 and neutral. If the AC distribution system have 208VAC
for L1-L2 and 120VAC for L1-N and L2-N, the AC modules should not be connected more than 18 AC modules
for the three phase system having one 3-pole 20AMP circuit breaker at the distribution panel. And do not
exceed 6 AC modules per phase.
Step 2. Install an AC junction box on an appropriate position for a transition cable to reach to the last AC module. If
necessary, move the AC junction box close to the last AC modules.
Step 3. Check extension/transition cables to verify they have not been pulled too tight or are hanging too loose. Attach
cables on a structure like PV racks or rails using the cable ties. Also, place extension/transition cables or AC
cables under a structure so that wires can avoid direct sunlight exposure and water immersion.
Step 4. Connect the equipment grounding conductor from all of the AC modules to the AC junction box ending to the
distribution panel.
Step 5. Make sure that a conduit or a small pipe protects wires from the AC junction box to the distribution panel from
rain, snow or direct sunlight.
X 6
X 6
X 6
Distribution panelAC junction box
Meter
3-pole
20A
AC output three phase 208VAC –merge type
3 - array of AC modules
transition cable
Conductor Color Description
L1 Black
Line to neutral voltage 120VAC
L2 Red
Line to neutral voltage 120VAC
Neutral White
Neutral
between L1 and L2
External Equipment Grounding Conductor (Array ↔ AC junction box)
Ground Green
Conductor to connect normally non
–current carrying metal parts of equipment together
General cable
L1 Black
Line to neutral voltage 120VAC
L2 Red
Line to neutral voltage 120VAC
L3 Blue
Line to neutral voltage 120VAC
L1-L2 -
Line to line
voltage 208VAC
L2-L3 -
Line to line
voltage 208VAC
L3-L1 -
Line to line
voltage 208VAC
Neutral White
Neutral
between L1 and L2
Ground Green
Conductor to connect normally non
–current carrying metal parts of equipment together
N L1 L2 L3
G
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