Program features 47
Sudden change in grounding current
When the grounding feature is enabled, the MGND-01 unit constantly measures the
current flowing through the grounding circuit and obtains the rms current value and the
pure resistive current of that value. The resistive current (i.e. residual current) value is
monitored for sudden changes and if certain limits (defined by standards) are exceeded,
the inverter triggers a warning or a fault.
Grounding unit
The optional grounding unit MGND-01 enables solar panel array DC+ or DC- grounding.
MGND-01 is equipped with grounding current measurement circuits and a fuse for
protecting the measurement circuitry in case of excessive grounding currents.
Settings
See parameter group: 210 Grounding supervision
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