Connecting Dc Input Power Cables - Huawei SUN2000 Series User Manual

SUN2000-(29.9KTL, 33KTL-A, 36KTL, 42KTL)
User Manual
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Follow-up Procedure
Check that the cables are connected correctly and securely. Then seal the connectors.

5.4 Connecting DC Input Power Cables

Prerequisites
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Ensure that the following conditions are met. Otherwise, the SUN2000 will be damaged, or
even a fire disaster will be caused.
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Issue 11 (2019-06-08)
Before connecting DC input power cables, ensure that the DC voltage is within the safe
range (lower than 60 V DC) and that the two DC switches on the SUN2000 are OFF.
Otherwise, the high voltage may result in electric shocks.
When the SUN2000 is grid-tied, it is not allowed to maintain DC input power cables, such
as connect or disconnect a string or a module in a string. Otherwise, electric shocks may
occur.
The open-circuit voltage of each PV string is always lower than or equal to 1100 V DC.
The positive and negative terminals of a PV module connect to the positive and negative
DC input terminals of the SUN2000 respectively.
If the DC input power cable is reversely connected, do not operate the DC switches and
positive and negative connectors immediately. Wait until the solar irradiance declines at
night and the PV string current reduces to below 0.5 A. Then, turn off the two DC switches,
remove the positive and negative connectors, and correct the polarity of the DC input
power cable.
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