11
EN-US
NOTE!
Automatic reconnection no longer occurs after the device is disconnected from the
grid five times as a result of exceeding the defined leakage current value.
The State Code 607 shown on the display must be acknowledged to reconnect.
Insulation monitoring of ungrounded solar modules
In the case of grid connected photovoltaic systems with ungrounded solar modules, the in-
verter checks the insulation resistance between the positive and negative pole in relation
to the earth potential before energy is fed into the grid. The inverter issues a state code if
the insulation resistance is too low. The inverter is therefore not permitted to start feeding
energy into the grid.
Arc detection/in-
terruption
The inverter is equipped with integrated arc detection/interruption, which detects and ex-
tinguishes serial arcs.
For example, a serial arc can occur after the following errors or situations:
-
Poorly-connected plug connections on the solar module
-
Poor or defective cable connections on the solar module side, which enable a connec-
tion against the earth potential
-
Defective solar modules due to problems in the junction box or production errors, such
as high resistance solder connections in individual solar cells
-
Cables incorrectly connected to an inverter’s input terminals
If a serial arc is detected, the power is switched off and the grid power feed operation is
interrupted. A state code is shown on the display. The state code on the display must be
manually reset before the grid power feed operation can be resumed.
The power shutdown also extinguishes the serial arc.
NOTE!
This product is equipped with a communication interface in line with the "Commu-
nication Signal for Rapid Shutdown - SunSpec Interoperability Specification”.
Power optimizers and other MLPE features in the photovoltaic system can impair the cor-
rect functioning of the arc detection/interruption. When using these kinds of components,
the system installer is responsible for ensuring the correct functioning of the arc detection/
interruption. Contact your Fronius Technical Support for more information.
Power Line Com-
munication (PLC)
Transmitter
This inverter is equipped with a Power Line Communication (PLC) Transmitter on the DC
side.
The purpose is to provide Rapid Shutdown acc. to NEC Edition 2017 Art. 690.12. The PLC
is implemented according to the Specification "Communication Signal for Rapid Shutdown
- SunSpec Interoperability Specification". Details can be found at www.sunspec.org
To ensure compliance with all regulations applicable in your country and to provide best
reception at the receivers, please follow the recommendations below:
-
Keep distance between DC+ and DC- Conductors as close as possible
-
Avoid cable loops of excessive cables (coiling).
-
Use metallic raceways where possible
-
Do not run DC cables from different inverters in the same raceway or cable tray.
