Connecting Cables - Huawei SUN2000-20KTL-M3 Quick Manual

4

Connecting Cables

4.1 Preparations
•
Connect cables in accordance with local installation laws and regulations.
• The cable specifications must comply with local standards.
• Before connecting cables, ensure that the DC switch of the solar inverter and all the switches
connected to it are set to OFF. Otherwise, the high voltage produced by the solar inverter
may cause electric shocks.
No. Cable
1 PE cable
AC output power
2
cable
DC input power
3
cable
(Optional) RS485
4 communications
cable
4.2 Connecting a PE Cable
Do not connect the neutral wire to the
enclosure as a PE cable. Otherwise, electric
shocks may occur.
• The PE point at the AC output port is used
only as a PE equipotential point, not a
substitute for the PE point on the
enclosure.
•
It is recommended that silica gel or paint
be applied around the ground terminal
after the PE cable is connected.
Type
Single-core outdoor copper-
core cable
Outdoor copper-
core/aluminum-core cable
Common outdoor PV cable in
the industry (recommended
model: PV1-F)
Two-core outdoor shielded
twisted pair
Specifications
Conductor cross-sectional area ≥ 5.5 mm
• Conductor cross-sectional area: 16-50
2
mm outdoor copper-core cable or 35-
2
50 mm outdoor aluminum-core cable
• Cable outer diameter: 16–38 mm
• Conductor cross-sectional area: 3.5–6
2
mm
•
Cable outer diameter: 5.5–9 mm
• Conductor cross-sectional area: 0.2–1
2
mm
• Cable outer diameter: 4–11 mm
4
2
Reserved PE point