Installing The Dc Input Power Cable - Huawei SUN2000L2KTL User Manual

SUN2000L-(2KTL-5KTL)
User Manual
Figure 5-10 Removing a plug insert

5.4 Installing the DC Input Power Cable

Prerequisites
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Ensure that the following conditions are met. Otherwise, the SUN2000L will be damaged, or
even become a fire hazard.
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Issue 05 (2019-06-06)
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 DC switch on the SUN2000L is OFF. Failing to
do so may result in electric shocks.
When the SUN2000L is operating, it is not allowed to work on DC circuit, such as
connecting or disconnecting a PV string or a PV module in a PV string. Failing to do so
may cause electric shocks.
If no PV string connects to the DC input terminals, do not remove the watertight cap from
the DC input terminals. Otherwise, the SUN2000L will not comply with its Ingress
Protection Rating.
The open-circuit voltage of each PV string is always lower than or equal to 600 V DC.
The positive and negative terminals of a PV string connect to corresponding positive and
negative DC input terminals of the SUN2000L.
If polarity of the DC input power cable is reversed and the DC switch is ON, do not turn
off the DC switch immediately or unplug positive and negative connectors. Wait until the
solar irradiance declines at night and the PV string current reduces to below 0.5 A, and
then turn off the DC switch and remove the positive and negative connectors. Correct the
string polarity before reconnecting the string to the SUN2000L.
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5 Electrical Connections
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