LG A1 Series Installation Manual page 43

AC output three phase 208VAC –split type
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.
X 10
X 10
X 10
3 - array of AC modules
Conductor Color
L1 Black
L2 Red
Neutral White
Ground Green
L1 Black
L2 Red
L3 Blue
L1-L2 -
L2-L3 -
L3-L1 -
Neutral White
Ground Green
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 10 AC modules
for one 2-pole 20AMP circuit breaker at the distribution panel.
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 clips. 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.
Rev. 1.5
AC Module System Installation Manual
Line to neutral voltage 120VAC
Line to neutral voltage 120VAC
Neutral between L1 and L2
External Equipment Grounding Conductor (Array ↔ AC junction box)
Conductor to connect normally non–current carrying metal parts of equipment together
Line to neutral voltage 120VAC
Line to neutral voltage 120VAC
Line to neutral voltage 120VAC
Line to line voltage 208VAC
Line to line voltage 208VAC
Line to line voltage 208VAC
Neutral between L1 and L2
Conductor to connect normally non–current carrying metal parts of equipment together
General wiring
General wiring
General wiring
AC junction box
transition cable
Description
General wiring
Meter
2-pole
20A
2-pole
20A
2-pole
20A
G
N L1 L2 L3
Distribution panel
43