15
Protection of Persons and Equipment
Safety
Protection of Per-
sons and Equip-
ment
The design and function of the inverter provide a maximum level of safety during both in-
stallation and operation.
The inverter provides operator and equipment protection through:
a) RCMU
b) monitoring the grid
RCMU RCMU = Residual Current Monitoring Unit
The inverter is equipped with an RCMU according to DIN VDE 0126-1-1.
It monitors residual currents from the solar module to the inverter grid connection and dis-
connects the inverter from the grid when an improper residual current is detected.
Additional residual current protection may be needed depending on the installation's pro-
tection system or the requirements of the utility company. In this case, use a type B residual
current circuit breaker with a release current of at least 100 mA.
Monitoring the
Grid
Whenever conditions in the electric grid are inconsistent with standard conditions (for ex-
ample, grid switch-off, interruption), the inverter will immediately stop operating and inter-
rupt the supply of power into the grid.
Grid monitoring is carried out using:
- Voltage monitoring
- Frequency monitoring
- Monitoring islanding conditions
WARNING! If the equipment is used or tasks are carried out incorrectly, serious
injury or damage may result. Only qualified personnel are authorized to install
your inverter and only within the scope of the respective technical regulations. It
is essential that you read the "Safety regulations" chapter before commissioning
the equipment or carrying out maintenance work.
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