Protection Features - Kaco blueplanet 3.0 NX3 M2 Manual

•
Use of a distribution system that is not described (grid type)
• Use of sources other than PV-strings
•
Mobile use
• Use in rooms where there is a risk of explosion
• Use in direct sunlight, rain or a storm or other harsh environmental conditions
• Use in an outdoor area that does not meet the environmental conditions set down in Technical Data > Environmental
Data.
• Operation outside the specification intended by the manufacturer
• Overvoltage of over 1100 V on the DC connection.
• Modifying the device
• Standalone mode
2.2

Protection features

The following monitoring and protection functions are integrated in the device:
• RCMU (Residual Current Monitoring Unit)
• Overvoltage conductor / varistor to protect the power semiconductors from high-energy transients on the grid and
generator sides.
• System for monitoring the device temperature
• EMC filters to protect the inverter from high-frequency grid interference
• Grid-side grounded varistors to protect the product against burst and surge pulses
• Anti-islanding detection according to the current standards.
• Insulation detection / residual current monitoring and shutdown function to detect insulation faults.
NOTE
If the device is connected, the overvoltage conductors / varistors contained in the device have an impact on
the electrical system insulation resistance test as per HD 60364-6 / IEC 60364-6 Low-voltage installations-
Part 6: Verification.
IEC 60364-6 6.4.3.3 describes two options for this case. The first option is to disconnect devices with an
overvoltage conductor or, if this is not practicable, then the test voltage can be reduced to 250 V.
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