User Manual
11
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Insulation resistance to ground surveillance
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Inverter output voltage surveillance
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Inverter output frequency surveillance
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Residual current protection
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DC component of AC output current surveillance
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Anti-islanding phenomena protection
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Ambient temperature surveillance
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DC over-voltage protection
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Over current protection
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Power module over-temperature protection
2.3.3 Derating
Derating the output power is a way to protect the inverter from overload and
potential faults. Inverter’s derating function can be activated in the following
scenarios:
Grid voltage too low
Temperature too high (Inner temperature and power modules temperature)
Power limit setting on the inverter LCD display or remote dispatch
Grid frequency too high [when the Country(region) selection is “DE” or “IT”]
Power Limit Setting
User may allocate output power value of the inverter via LCD control panel or the
remote dispatch from the grid company.
Over-temperature Derating
Power modules over-temperature may result from high ambient temperature, poor
ventilation or fault of fans. Over-temperature derating may protect the inverter as
well as the power modules against damage.
When the modules temperature exceeds an upper limit, the inverter start to
gradually derating until the temperature decreases to normal range.
When the inner temperature exceeds an upper limit, the inverter start to
gradually derating until the temperature decreases to normal range.
