Name: Huawei SUN2000-280KTL Series
Brand: Huawei
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Procedure

NO TICE

● For the SUN2000-250KTL-H3/280KTL-H0/300KTL-H0, use the CT75A-1T-34/

CT75A-1T-35 (AVIC JONHON) PV connectors delivered 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.

● For the SUN2000-330KTL-H1/330KTL-H2/250KTL-H1, use the HH4SFD4TMS/

HH4SMD4TMS (AMPHENOL) PV connectors delivered 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.

● AVIC JONHON and AMPHENOL PV connectors cannot be used together.

● The DC voltage measurement range of the multimeter must be at least 1500 V.

● If the voltage is a negative value, the DC input polarity is incorrect. Rectify the

connection.

● If the voltage is greater than 1500 V, too many PV modules are connected to

the same string. Remove some PV modules.

● Connect the connectors on the PV strings to the connectors on the inverter, and

pull back the connectors on the PV strings along the axial direction to check

whether the connectors are securely installed.

● Ensure that the connectors are properly connected. Any connector damage due

to improper connection is not covered by the warranty.

Step 1 Before connecting PV strings to the SUN2000, ensure that the insulation resistance

of each PV string to the ground is normal.

Test method: Use an insulation resistance tester to test the insulation resistance of

the PV– cable to the ground. Add a DC voltage of more than 1500 V between the

PV– cable and the ground and check the insulation resistance.

● If the insulation resistance is greater than or equal to 1 MΩ, the insulation

resistance is normal.

● If the insulation resistance is less than 1 MΩ, troubleshoot the insulation fault

of the cable or PV string.

SUN2000-(250KTL, 280KTL, 300KTL, 330KTL) Series

User Manual 5 Electrical Connections

Huawei SUN2000-280KTL Series User Manual

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