Huawei SUN2000-2KTL-L0 - Installing the PE Cable

SUN2000-(2KTL-5KTL)-L0
User Manual
5 Electrical Connections
Issue 02 (2019-07-04)
Copyright © Huawei Technologies Co., Ltd.
39

The SUN2000 is embedded with a residual current monitoring unit (RCMU). Only a
single-phase circuit breaker or a similar AC load breaking device is required to function as
the external AC switch (shown by G in Figure 5-1) to ensure that the SUN2000 can be
safely disconnected from the power grid.

If the external AC switch can perform earth leakage protection, the rated leakage action
current should be greater than or equal to 100 mA.

If multiple SUN2000s connect to the general residual current device (RCD) through their
respective external AC switches, the rated leakage action current of the general RCD
should be greater than or equal to the number of SUN2000s multiplied by 100 mA.

A knife switch cannot be used as an AC switch.
Table 5-2 Cable description
No.
Cable
Type
Conductor
Cross-section
al Area Range
Outer
Diameter
Source
1
DC input
power
cable
Standard PV cable in the
industry (recommended
model: PV1-)
4–6 mm
2
4.5–7.8
mm
Purchased
by the
customer
2
Smart
Power
Sensor
signal
cable
Four-core outdoor
shielded twisted pair
cable
0.25–1 mm
2
4–11 mm
Purchased
by the
customer
3
AC output
power
cable

Not using the PE
equipotential point at
the AC output port:
two-core (L and N)
outdoor copper cable

Using the PE
equipotential point at
the AC output port:
three-core (L, N, and
PE) outdoor copper
cable
4–6 mm
2
10–21 mm
Purchased
by the
customer
4
PE cable
Single-core outdoor
copper cable with an M6
OT terminal
4–10 mm
2
N/A
Purchased
by the
customer