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Preconditions for the commissioning
–
The installation work has been made according to the
“Installation” chapter of this user manual.
– The ground around the PV AC
combiner box is firm and
easily accessible so that work can be done safe.
►
Wear appropriate clothes and personal protective equip-
ment.
►
Use appropriate tools with the correct insulation.
A multimeter is necessary in order to verify the
absence of voltage in the live parts of the com-
biner box.
► Check that the multimeter is capable to read
the maximum voltage of the string inverter
output and the maximum
current flowing
through before starting any operation.
DANGER
Imminent risk of life!
High voltages up to 800 V AC are present in
the live parts. Touching live parts can result in
death or serious injury due to electric shock.
► Before starting any work in the PV AC
combiner box:
– disconnect the main switch
– ensure that there are no fuses inserted
into the fuse-holders.
►
Ensure that nobody reconnects the unit
while work is not finished or any operator
is still working.
►
Ensure that no voltage is present in parts
that are going to be manipulated or that
could be accessible.
►
Do not touch live components.
► If specific live parts cannot be insulated or
disconnected, it is mandatory to use addi-
tional safety elements to avoid any risk to
persons or equipment.
6.1 Main indications and inspections
It is recommended to carry out a general inspection on the
PV AC combiner box and the status of the installation be-
fore commencing operation.
The installation must comply with either local and interna-
tional regulations.
Visual inspection
Check the following issues:
– All cables are in good condition.
– There are no hazards around the installation that could
create any damage.
– The cables are connected to the correct phase and ac-
cording to electrical drawing provided.
–
The enclosure is firmly fixed to the structure, all mount
-
ing elements are tightened properly.
– The door of the enclosure is properly closed and the
seal fits all around the door to provide the insulation. As
a check press the door while locking the key-locks a few
times.
– The cable glands are tightened correctly.
– The grounding cable is connected through its own cable
gland and the cable gland is tightened correctly.
–
Check the correct status of the SPD. The viewing win
-
dow should be in green colour.
Additional inspections issues for combiner boxes
with Energy meter
–
The RS485 wire is correctly connected to the specific
terminals inside the combiner box or alternatively to the
D650 connector through its own cable gland.
– The cable gland for communications cable is tightened
correctly.
Measurements
DANGER
Imminent risk of life!
High voltages up to 800 V AC are present in
the live parts. Touching live parts can result in
death or serious injury due to electric shock.
► Before starting any work in the
PV AC combiner box:
– disconnect the main switch
– ensure that there
is no current flowing
through any of the wires of the box.
6 Commissioning
