Huawei SUN2000-75KTL Series - Page 61

NO TICE
The solar inverter has an RCMU inside. Its external AC switch should be a three-
phase circuit breaker or other AC load circuit breakers to safely disconnect the
solar inverter from the power grid.
NO TE
● The cable diameter must comply with local cable standards.
● The factors that
aect cable selection include the rated current, cable type, routing
mode, ambient temperature, and maximum expected line loss.
Table 5-2 Cable description of a 3-pin model (S: cross-sectional area of the AC cable conductor; S
p
:
cross-sectional area of the protective earthing cable conductor)
No. Cable Category Conductor
Cross-Sectional
Area Range
Outer
Diameter
Source
1 DC input
power cable
PV cable that meets the
1100 V standard
4–6 mm
2
5.5–9 mm Prepared by
the
customer
2 RS485
communicatio
ns cable
Outdoor shielded twisted
pair that meets the local
standard
0.25–1 mm
2
● One or
two
commu
nication
s cables:
4–11
mm
● Three
commu
nication
s cables:
4–8 mm
Prepared by
the
customer
3 Protective
earthing (PE)
cable
[1]
Single-core outdoor
copper cable and M10
OT/DT terminals
S
p
≥ S/2 N/A Prepared by
the
customer
4 Tracking
system power
cable
Three-core outdoor
copper cable with dual-
layer protection
10 mm
2
15–18 mm Prepared by
the
customer
SUN2000-(75KTL, 100KTL, 110KTL, 125KTL) Series
User Manual 5 Electrical Connections
Issue 15 (2023-01-31) Copyright © Huawei Technologies Co., Ltd. 51