1. Evenly distribute DC input power cables on the DC input terminals controlled
by the two DC switches.
2. Maximize the number of connected MPPT circuits.
Cable Specications
Cable Type Conductor Cross-
Sectional Area (mm
2
)
Cable Outer Diameter
(mm)
PV cable that meets the
1100 V standard
4.0–6.0 (12–10 AWG) 4.5–7.8
Cables with high rigidity, such as armored cables, are not recommended, because
poor contact may be caused by the bending of the cables.
Procedure
Step 1 Prepare positive and negative connectors.
Use the Amphenol Helios H4 PV connectors supplied with the SUN2000. If the PV
connectors are lost or damaged, purchase the connectors of the same model. The
device damage caused by incompatible PV connectors is not covered under any
warranty.
● The metal contacts supplied with the DC connectors are either cold forming
contacts or stamping forming contacts. Choose the crimping tools that t the
metal contact types. Do not mix up the tools.
● Crimp the metal cold forming contacts using crimping tool UTXTC0005
(Amphenol, recommended) or H4TC0001 (Amphenol).
● Crimp the metal stamping forming contacts using crimping tool H4TC0003
(Amphenol, recommended), H4TC0002 (Amphenol), PV-CZM-22100 (Staubli),
or PV-CZM-19100 (Staubli). When choosing PV-CZM-22100 or PV-CZM-19100,
do not use the locator. Otherwise, metal contacts would be damaged.
SUN2000-(70KTL, 75KTL)-C1
User Manual 5 Electrical Connections
Issue 09 (2020-10-12) Copyright © Huawei Technologies Co., Ltd. 47
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