Repair; Galvanic Isolation - Fronius IG 2000 Operating Instructions Manual

Galvanic
The design and function of the FRONIUS IG unit offers a maximum
isolation
level of safety, both during installation as well as in operation. A com-
plete galvanic isolation between the DC and AC sides is one such
safety feature.
The FRONIUS IG provides galvanic isolation and grid monitoring.
The passive and active measures for the protection of persons and
equipment help ensure safe installation and operation.
Whenever conditions in the electric grid are inconsistent with stan-
Monitoring
the grid dard conditions (for example grid switch-off, interruption, etc.), your
FRONIUS IG unit will immediately stop operating and interrupt the
supply of power into the grid.
Your FRONIUS IG unit determines the grid's status by:
- monitoring voltage
- monitoring frequency
- monitoring islanding conditions
This scheme prevents dangerous voltages at the AC lines and con-
stitutes an essential contribution towards avoiding hazards for the
maintenance staff.
Only FRONIUS service staff are authorized to carry out repairs to the

Repair

FRONIUS IG unit.
Solar modu- Before connecting the solar modules, you must check whether the
les voltage parameters specified in the manufacturer's data correspond
with the actual parameters.
When checking the voltage reading, please take into account that
solar modules supply a higher open circuit voltage when temperatu-
res are low and sunlight level remains unchanged.
The data sheet of the solar module will tell you the temperature fac-
tors applicable for ascertaining the theoretical open-circuit voltage at
14 °F (-10 °C).
If the solar modules exceed an open-circuit voltage of 500 V, regard-
less of temperature the FRONIUS IG unit might be damaged and all
warranty rights will be voided.
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