5.5 Connecting the Electricity Grid (AC)
5.5.1Conditions for the AC Connection
You must comply with the connection requirements of your network operator
.
Residual Current monitoring
The inverter is equipped with an integrated all-pole-sensitive residual-current monitoring unit.
The inverter can automatically differentiate between residual currents and normal leading leakage
currents.
If an external RCD or residual-current device (RCMU breaker) is strictly required, you must use
a switch that trips at a residual current 100mA≤ Ifn ≤300mA.
The external RCMU breaker should be installed between inverter and Grid. No load should not
connected to the inverter directly.
Connection of a Second Protective Conductor
In some installation countries, a second protective conductor is required in order to prevent a
contact current in the event of failure of the original protective conductor.(See section 5.5.3)
IEC standard 62109 requirements:
• Installation of the protective earthing conductor at AC terminal with a cross-section of at least
10mm
2
(copper), or 16mm
2
(aluminum).
UTE C15-712-1:2010 requirements:
• The inverter body conductive accessories must be connected to the equipotential bonding
via a conductor with a minimum cross-section of 6mm² Cu or equivalent and to the protective
conductor at AC terminal.
5.5.2 AC Connection procedure
1)Strip the cable with the length 12mm, be careful NOT to nick conductors.
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