ClicSeam™ Safety and Installation Manual
15
The insulation should be suitable for the type of installation method used and must meet
SKII (Safety Class II) and IEC 61730 requirements. The polarities of cables and terminals
must be matched when making the connections, failure to do so may result in damage
to the Product and to person. Ensure that all electrical connections are secure and tight.
Series and Parallel Wiring
Voltages are additive when Products are connected directly in series, and currents are
additive when the Products are connected directly in parallel. PV circuits should be
designed according to the best practice guidelines of the respective country. The maxi-
mum number of Products that can be connected in series string must be calculated in
accordance with applicable regulations so that the specified maximum system voltage
of the Products and all other electrical DC components are not exceeded in open-circuit
operation at the lowest temperature expected at the PV system location. In addition,
the maximum number of strings that can be connected in parallel cannot exceed 2
without proper protection. An overcurrent protection device is required for each series
string if more than two series strings are connected in parallel. The maximum system
voltage of the
Roofit
.solar Product is DC 1000V according to the safety assessments
of the IEC61730. The correction factor for the open-circuit voltage can be calculated
based on the following formula:
C
V oc
= 1 −
β
* (25ºC −
T
min
),
T
min,
ºC is the lowest expected ambient temperature at the system site.
β
, %/°C is the
temperature coefficient of the selected Product
V
oc
(See Appendix 1). A properly rated
overcurrent protection device must be used when the reverse current could exceed the
maximum fuse rating
of the Product.
The inverter (String
[–], String [+]), the
grounding and
extension cables
connecting the
Roofit.solar Products
should be positioned
on site (i.e. between
battens) before the
installation. Loose
cables should be
fixed to the wooden
structure with the
help of cable holder
clips.
String [
–
]
Jumper cables
Extension cable
String [
+
]
Grounding
