9
1956*992
10
1979*1002
11
1987*992
12
2008*1002
13
2115*1052
7 Electrical connection
7.1 Please read the electrical wiring drawings carefully before wiring, when the modules followed
the IEC standard, the maximum system voltage is 1500V DC.
7.2 The connection of module and junction box: the module is connected with junction box by a dc
cable. The cross-sectional area of cable and the connector capacity must be satisfied the
system's short circuit current (the cable's cross-sectional area for a single module is
recommended to be 4mm
2
, The outer diameter of the cable could be selected 5-7mm. The fuse
current and the rated current of the connector should be higher than 15A.) Otherwise, the cables
and connectors will overheat due to high current. Please note that the highest temperature of
cable is 90
℃
, and the highest temperature of connector is 125
℃
.
7.3 Aluminum frame and brackets of modules must be grounded with four ground holes of each
module, which is marked on frames (it is recommended that each series/parallel of modules
should be grounded once). The specific location of the grounding holes can be seen as the figure
below. The ground wire and frame will be reliable grounding through the reserve grounding holes,
by the installation bolts M5X10 ~ 15 matching plain washers, spring washers and nuts. Modules
and ground cables shall be connected perfectly by wiring nose. Negative grounded inverters can
be installed to prevent PID phenomenon.
7.4 Where common grounding hardware (nuts, bolts, star washers, spilt-ring lock washers, flat
washers and the like) is used to attach a listed grounding/bonding device, the attachment must be
made in conformance with the grounding device manufacturer's instructions.
7.5 Common hardware items such as nuts, bolts, star washers, lock washers and the like have not
been evaluated for electrical conductivity or for use as grounding devices and should be used only