Connecting Cables; Preparing Cables - Huawei SUN2000 3,6KTL-L1 Quick Manual

3

Connecting Cables

3.1

Preparing Cables

Do not connect loads between the inverter and the AC switch that directly connects to the
•
inverter. Otherwise, the switch may trip by mistake.
If an AC switch is used with specifications beyond local standards, regulations, or Huawei's
•
recommendations, the switch may fail to turn off in a timely manner in case of exceptions,
causing serious faults.
Each inverter must be equipped with an AC output switch. Multiple inverters cannot connect
to the same AC output switch.
• To ensure that the inverter can be safely disconnected from the power grid when an
exception occurs, connect an AC switch to the AC side of the inverter. Select an appropriate
AC switch in accordance with local industry standards and regulations.
• Connect cables in accordance with the local installation laws and regulations.
•
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.
Prepare cables based on site requirements.
No. Cable
Protective earthing
1
(PE) cable
AC output power
2
cable
DC input power
cable and
3
(optional) battery
cable
(Optional) Signal
4
cable
Type
Single-core outdoor
copper cable
Two-core (L and N) or
three-core (L, N, and
PE) outdoor copper
cable
Standard outdoor PV
cable in the industry
Outdoor shielded
twisted pair cable
Conductor Cross-
Sectional Area Range
2
4–10 mm
2
4–6 mm
2
4–6 mm
When cables are
crimped: 0.20–0.35
2
mm
When cables are not
crimped: 0.20–1 mm
4
Outer Diameter
N/A
10–21 mm
5.5–9 mm
four-hole rubber
⚫
plug: 4–8 mm
two-hole rubber
⚫
plug: 8–11 mm
2