Huawei SUN2000 Series User Manual page 39

SUN2000-(12KTL-25KTL)-M5 Series
User Manual
● Cables with high rigidity, such as armored cables, are not recommended as DC
● Before assembling DC connectors, label the cable polarity correctly to ensure
● After crimping the positive and negative metal terminals, pull back the DC
● Insert the crimped metal terminals of the positive and negative power cables
● If a DC input power cable is reversely connected and DC SWITCH is set to ON,
Step 1 Install the DC input power cables.
Use the Staubli MC4 positive and negative metal terminals and DC connectors
delivered with the inverter. Using incompatible positive and negative metal
terminals and DC connectors may result in serious consequences. The resulting
device damage is not covered under any warranty.
Issue 01 (2022-06-15)
NO TICE
input power cables, because poor contact may be caused by the bending of the
cables.
correct cable connections.
input power cables to ensure that they are connected securely.
into the appropriate positive and negative connectors. Then pull back the DC
input power cables to ensure that they are connected securely.
do not operate on DC SWITCH or the positive and negative connectors
immediately. Otherwise, the device may be damaged. The resulting device
damage is not covered under any warranty. Wait until the night when solar
irradiance declines and the PV string current drops to below 0.5 A. Then set DC
SWITCH to OFF, remove the positive and negative connectors, and connect DC
input power cable correctly.
NO TE
● The DC voltage measurement range of the multimeter must be at least 1100 V. If the
voltage is a negative value, the DC input polarity is incorrect. Correct the cable
connection. If the voltage is greater than 1100 V DC, too many PV modules are
connected in the same string. Re-configure the PV modules.
● If PV strings are configured with optimizers, check the cable polarity by referring to the
Smart PV Optimizer Quick Guide .
CA UTION
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5 Electrical Connections
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