44
DC Cable Connection
To ensure the optimum performance of the inverter, please read the
following guidelines before performing any DC connections:
(a) Confirm the DC configuration and ensure that the
maximum open circuit voltage of the PV modules is lower
than 1500Vdc under any conditions;
(b) Confirm that the PV strings for the MPPT of the inverter
are of the same type and specification before connection.
(c) Check the polarity (Figure 3-20) before terminating the DC
cables of PV strings according to the following steps:
i.
Use a multi-meter to measure the PV strings’ cable
ends and check the polarity.
ii.
The positive (+) terminal of cable should match the
positive (+) terminal of inverter’s DC input.
iii.
The negative (-) terminal of cable should match the
negative (-) terminal of inverter’s DC input.
(d) Remove the liquid-tight hole plugs from the DC input of the
wiring box and install 2-inch conduit and conduit fittings
into the holes. Then route the cables through the conduit
inside the wiring box.
(e) Connect the DC cables to the fuse holders and tighten
the screws or Nuts per Torque Table above.
NOTICE:
It is important to use a multi-meter, rated at least 1500V to check the
polarity of the DC input conductors to avoid any risk of reverse
polarity.
A reversed string is extremely hazardous and will result in a blown fuse when
the irradiation is high. The voltage across the blown fuse will be 2x Voc and
could prevent proper fuse operation resulting in a fire.
Summary of Contents for CPS SCH Series
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Page 43: ...39 Figure 3 25 AC Output Cable Connection Distributed Wire box L1 L2 L3 ...
Page 45: ...41 Figure 3 27 AC Output Cable Connection Centralized Wire box Ver 2 ...
Page 58: ...54 Figure 4 1 System setting ...
Page 81: ...77 5 4 2 6 Others The REF column is reference to Table 5 7 Enable functions ...
