Ground Fault Detector / Interrupter, Insulation Monitoring; Arc Detector / Interrupter - Fronius Galvo 1.5-1 208 Instructions De Service

Ground Fault De- The inverter is fitted with the following safety functions as required by UL 1741 and the Na-
tector / Interrupt- tional Electrical Code:
er, Insulation
Monitoring Ground fault detector / interrupter (GFDI)
In photovoltaic systems with negatively grounded solar modules, the negative cable from
the solar module is connected to the grounding system in the inverter. If a ground fault oc-
curs in the DC wiring, the inverter disconnects from the grid.
Insulation monitoring
In photovoltaic systems with ungrounded solar modules, the inverter checks the resis-
tance between the photovoltaic system's positive or negative pole and the ground poten-
tial. In the case of a short circuit between the DC+ or DC- cable and the ground (e.g., due
to poorly insulated DC cables or faulty solar modules) the inverter disconnects from the
grid.
Arc Detector / In- The inverter has an integrated arc detector / interrupter, which detects and deletes serial
terrupter arcs.
A serial arc may occur after the following example errors or situations:
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If an arc is detected, the power is shut down and the grid power feed operation is interrupt-
ed. A status code appears on the display.
The status code on the display must be reset manually before the grid power feed opera-
tion can be resumed.
The power shut down also deletes the serial arc.
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Industry Canada RSS
The device corresponds to the license-free Industry Canada RSS stan-
dards. Operation is subject to the following conditions:
(1) The device may not cause harmful interference
(2) The device must accept any interference received, including interfer-
ence that may cause undesired operation.
poorly connected DC plug
defective solar module connection sockets
high resistance solder connections between the cells of a solar module
incorrect cable connected to the input terminal of an inverter
defective DC cables that allow a connection to the ground.
NOTE! Power optimizers for solar modules or data transfer via DC cables (PLC
– Power Line Communication) in the PV system can compromise the correct
function of the arc detector / interrupter.
When using such components, it is the responsibility of the system installer to en-
sure that the arc detector / interrupter functions correctly. Contact Fronius Tech-
nical Support for further information.