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06 Electrical Connection User Manual V1.0-2023-03-20
6.4 Connecting the AC Output Cable
WARNING
Do not connect loads between the inverter and the AC breaker directly connected to the
inverter.
An AC circuit breaker should be installed on the AC side to make sure that the inverter can safely
disconnect the grid when an exception happens. Select the appropriate AC circuit breaker in
compliance with local laws and regulations. Recommended AC circuit breakers:
Inverter model AC circuit breaker
GW320K-UT, GW320KH-UT,GW350K-UT, GW350KH-UT 400A
NOTICE
Install one AC circuit breaker for each inverter. Multiple inverters cannot share one AC circuit
breaker.
WARNING
• Pay attention to the silkscreens L1, L2, L3, and PE on the AC terminal. Connect the AC
cables to the corresponding terminals. The inverter may be damaged if the cables are
connected inappropriately.
• The grounding point inside the wiring box is used for connecting the PE cable of the multi
core AC cable.
• Make sure that the whole cable cores are inserted into the AC terminals. No part of the
cable core can be exposed.
• Make sure that the cables are connected securely. Otherwise, the terminal may be too hot
to damage the inverter when the inverter is working.
• Reserve certain length of PE cable. Make ensure that the PE cable is the last one to bear the
stress when the AC output cable is under tension.
• The waterproof rubber seal ring for the AC outlet hole is delivered with the inverter, which
is located in the AC wiring box of the inverter. Please select the rubber seal ring types
according to the actual using cables’ specication.
• The M8 OT terminal for PE cable and M12 OT terminal for AC cable should be prepared by
customer.
• When multiple inverters are connected to the utility grid in parallel, up to 14 inverters can
be connected to a single winding of the box transformer.
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