Koyoe KY-EST06KH, User Manual

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8.7. AC Cable Connection
8.7.1 Grid Side Requirements
An independent three or four-pole circuit breaker must be installed on the output side of
the inverter to ensure safe disconnection from the grid.
Inverter Model Recommended AC circuit breaker current
KY-EST12KH 63A
KY-EST15KH 63A
KY-EST17KH 63A
KY-EST20KH 63A
Be careful!
-Multiple inverters cannot share one circuit breaker.
-Never connect a load between the inverter and the circuit breaker.
Residual Current Monitoring Device
With an integrated universal current-sensitive residual current monitoring unit included, the
inverter will disconnect immediately from the mains power once a fault current with a value
exceeding the limit is detected.
However, if an external residual current device (RCD) is mandatory, the switch must be
triggered at a residual current of 300 mA (recommended), or it can be set to other values
according to local regulations. For example in Australia, the inverter can use an additional
30mA
（
Type A
）
RCD in installations.
8.7.2 Assembling the AC Connector
The GRID terminal is on the lower right of the wiring panel of the inverter. AC connection is
the three-phase-four-wire grid +PE connection (L1, L2, L3, N, and PE).
Step 1: Close the fuse of the manual AC circuit breaker to prevent the circuit breaker from
being opened unintentionally;
Step 2: Put the cable through the nut, sealing ring and threaded sleeve in sequence, insert
the cable into the terminal according to the polarity shown on it, and tighten the
screw. As shown in Figure ;