System Commissioning; Checking Before Power-On; Dc Input Detection - Huawei SUN2000-55KTL Series User Manual

SUN2000-(55KTL, 60KTL) Series
User Manual

6.1 Checking Before Power-On

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10. Unused DC input terminals are sealed.
11. Unused USB ports are plugged with waterproof plugs.
12. Unused waterproof connectors are plugged and the locking caps are tightened.

6.2 DC Input Detection

Function Description
When SUN2000 detects an abnormal DC input voltage from any PV string after DC cables
are connected to the SUN2000, the SUN2000 generates an alarm through the LED indicator
and buzzer. Attention from site personnel is required to check and clear the fault, to avoid
damage to the SUN2000.
The SUN2000 provides four MPPT circuits with eight DC input terminals, as shown in
6-1. After one PV string correctly connects to the MPPT1 circuit, the SUN2000 can start the
DC input detection function. DC input detection can be performed automatically or manually.
Issue 06 (2020-01-03)
6
The SUN2000 is installed correctly and securely.
Check that the DC switch and downstream AC output switch are OFF.
All ground cables are connected securely.
All AC output power cables are connected correctly and securely, without open circuits
or short circuits.
All DC input power cables are connected correctly and securely, without open circuits or
short circuits.
The communications cable is connected correctly and securely.
Check that all used waterproof connectors at the bottom of the enclosure are sealed, and
that the thread-lock sealing nut is tightened.
The AC terminal cover is reinstalled.
The maintenance compartment door is closed and the door screws are tightened.
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System Commissioning

6 System Commissioning
Figure
58