6 Electrical Connection User Manual
32
6.3.2 Connecting Inverter to AC Grid
Danger to human life due to high voltage existing inside the inverter!
y Make sure that all the AC cables to the inverter are not live before the
electrical work.
y Do not turn on the AC side circuit breaker until all inverter electrical
connections are completed.
Prior to connecting to the utility grid, verify whether the grid voltage and frequency
are within the range of inverter output parameters, referred to “Appendix”. Consult
local grid company for solution, if otherwise.
Connect the inverter exclusively to TN or TT mains as the following procedures:
Connecting SG10KTL/SG12KTL/SG15KTL to AC Grid
Step 1 Unscrew the water-proof terminal in the
following direction.
Step 2 Insert appropriate size AC cables into the
water-proof terminal.
Step 3 Strip off insulation layer of all AC cables.
The length of strip insulation is
approximately 5mm.
Step 4 Fix all cables ends to the corresponding
terminals with the torque of 1 Nm
according to markings on the connector,
especially “PE” cable. If a phase wire is
connected to the “PE” terminal, it may
permanently destroy the inverter.
Step 5 Pull cables outwards to confirm whether they are installed firmly.
Step 6 Combine the two front-end parts together with the torque of 2 Nm.
Step 7 Tighten the water-proof terminal with the torque of 5 Nm in opposite
directions.
Step 8 Make sure the AC and DC circuit breaker are disconnected.
Step 9 Connect phase cables and “N” cable to AC circuit breaker.
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