Huawei SUN2000-30KTL-US User Manual page 66

SUN2000-(25KTL, 30KTL)-US
User Manual
Prerequisites
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Ensure that the following requirements are met to prevent fire accidents:
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The PV strings must meet the following requirements if they need to be grounded:
Issue Draft C (2016-01-12)
PV modules generate electric energy when exposed to sunlight and can create an electrical
shock hazard. Therefore, when connecting DC input power cables, shield the PV modules
with opaque cloth.
Before connecting DC input power cables, ensure that the voltage on the DC side is within
the safe range (lower than 60 V DC) and that the DC SWITCH on the SUN2000 is OFF.
Otherwise, high voltage may result in electric shock.
PV modules connected in series in each PV string must be of the same specifications.
The maximum open-circuit voltage of each PV string must be always lower than or equal
to 1000 V DC.
The maximum short-circuit current of each MPPT string must not exceed 33 A.
The positive and negative terminals of PV modules must be connected to the positive and
negative DC input terminals of the SUN2000 respectively.
If the SUN2000 is directly connected to the power grid with the neutral wire connected to
the PGND cable (for example, a low-voltage power grid or a power grid with the neutral
wire grounded), do not ground the positive and negative terminals of PV strings.
Otherwise, the SUN2000 will fail to work.
During PV string and SUN2000 installation, the positive or negative terminals of PV
strings may be grounded if power cables are not properly installed or routed. In this case,
an AC or DC short circuit may occur and damage the SUN2000.
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5 Electrical Connections
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