5.7 Connecting DC Input Power Cables
Two models of PV connectors are delivered with the device: Amphenol Helios H4
and Staubli MC4. PV connectors of
dierent models cannot be used together.
Device damage caused by mixed use of dierent PV connectors is not covered by
the warranty.
● For details about using Amphenol Helios H4 PV connectors, see 5.7.2
Connecting Cables to Amphenol Helios H4 Connectors.
● For details about using Staubli MC4 PV connectors, see 5.7.3 Connecting
Cables to Staubli MC4 Connectors.
5.7.1 Cable Connection Description
Precautions
● Before connecting the DC input power cable, ensure that the DC voltage is
within the safe range (lower than 60 V DC) and that the three DC switches on
the solar inverter are set to OFF. Failing to do so may result in electric shocks.
● If you turn a DC SWITCH to ON by mistake when connecting or disconnecting
DC input power cables, do not remove or insert DC input terminals. If you need
to remove or insert a DC input terminal, perform the operations provided in 8.2
Power-O for Troubleshooting.
● When the solar inverter operates in grid-tied mode, do not perform
maintenance or operations on the DC circuit, such as connecting or
disconnecting a PV string or a PV module in the PV string. Failing to do so may
cause electric shocks or arcing, which may also cause
re.
Ensure that the following conditions are met. Otherwise, the solar inverter may be
damaged, or even a
re could happen.
● According to IEC 62548, the maximum open-circuit voltage of each PV string
cannot exceed 1100 V DC at the lowest average annual dry-bulb temperature.
● The polarities of electric connections are correct on the DC input side. The
positive and negative terminals of a PV module connect to corresponding
positive and negative DC input terminals of the solar inverter.
SUN2000-(75KTL, 100KTL, 110KTL, 125KTL) Series
User Manual 5 Electrical Connections
Issue 15 (2023-01-31) Copyright © Huawei Technologies Co., Ltd. 66
To Next Page
Loading...
Need help?
General