Safety
07
The islanding eect means that when the power grid is cut o, the grid-con-
nected power generation system fails to detect the power outage and still
supplies power to the power grid. This is very dangerous for the maintenance
personnel and the power grid on the transmission line.
This inverter use active frequency oset method to prevent islanding eect.
■ Anti-islanding Eect
In order to protect the AC system, the level 2 surge protection equipment
should be installed at the AC output, located between the inverter and the
grid. Installation requirements must comply with IEC61643-21 standard.
All DC cables shall be installed in a distance as short as possible, and the
positive and negative cables of the same input need to be bundled together to
avoid causing loops in the system. Minimum distance installation and binding
requirements also apply to auxiliary grounding and shielding grounding con-
ductors.
■ PE Connection and Leakage Current
• All inverter incorporate a certied internal Residual Current Device (RCM)
in order to protect against possible electrocution and re hazard in case of a
malfunction in the PV array, cables or inverter. There are 2 trip thresholds for
the RCM as required for certication (IEC 62109-2:2011).
• The default value for electrocution protection is 30mA, and for slow rising
current is 300mA.
• The inverter, with built-in RCM, will exclude possibility of DC residual cur-
rent up to 6mA.
• Check which type of RCD is required for the relevant grid code in your re-
gion. We strongly recommends to use an RCD Type B on the line connecting
to the house loads.
• A faulty ground connection can result in equipment failure, personal and
death injuries, and electromagnetic interference.
• Ensure correct grounding according to IEC62109 and conductor diameter
Warning!
High leakage current!
Earth connection essential before connecting supply.
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