Huawei SUN2000-75KTL Series - System Networking and Power Grids

● MBUS networking: Uses the existing power line for communication and does
not require additional communications cable, which reduces the construction
and maintenance costs and improves communication reliability and eciency.
● Smart I-V curve diagnosis: Implements I-V scanning and health diagnosis for
PV strings. In this way, potential risks and faults can be detected in time,
improving the plant operation & maintenance (O&M) quality.
Safe
● Embedded DC and AC surge protection devices (SPDs): all-dimensional surge
protection
● Embedded residual current monitoring unit: Immediately disconnects from the
power grid upon detecting that the residual current exceeds the threshold.
Networking
SUN2000 solar inverters apply to grid-tied systems of large-scale PV plants and
commercial distributed grid-tied systems. Typically, a grid-tied PV system consists
of the PV string, solar inverter, AC combiner box, and transformer station.
Figure 2-4 Networking
(1) PV string
(2) SUN2000 (3) AC combiner box
(4) Transformer station (5) Power grid -
NO TE
● Connect the SUN2000-125KTL-M0 to a dedicated power transformer instead of a low-
voltage overhead power cable.
● In a non-low-voltage grid-connected scenario, the SUN2000-100KTL-M1,
SUN2000-100KTL-INM0, and SUN2000-75KTL-M1 need to connect to an isolation
transformer and avoid overhead cabling.
Supported Power Grids
● SUN2000-110KTL-M0, SUN2000-100KTL-M0, SUN2000-100KTL-M1,
SUN2000-100KTL-INM0, and SUN2000-75KTL-M1 solar inverters support the
TN-S, TN-C, TN-C-S, TT, and IT power grids.
● The SUN2000-125KTL-M0 supports only the IT power grid.
SUN2000-(75KTL, 100KTL, 110KTL, 125KTL) Series
User Manual 2 Overview
Issue 15 (2023-01-31) Copyright © Huawei Technologies Co., Ltd. 16