SUN2000-(3.8KTL-11.4KTL)-USL0
User Manual
5 Electrical Connections
Issue 01 (2018-05-21)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
37
No.
Component
Description
Source
E
Battery switch
Recommended: a DC circuit breaker with a rated voltage
greater than or equal to 600 V DC and a rated current of:
15 A (SUN2000-3.8KTL/5KTL/7.6KTL-USL0)
20 A (SUN2000-9KTL/10KTL/11.4KTL-USL0)
Purchased by the
customer
F
Autotransformer
a
Recommended: HW-TX-5000
Can be
purchased from
Huawei
G
Critical load
switch
Recommended: a 2-pole AC circuit breaker with a rated
voltage greater than or equal to 240 V AC and a rated current
of:
25 A (SUN2000-3.8KTL/5KTL/7.6KTL-USL0)
30 A (SUN2000-9KTL/10KTL/11.4KTL-USL0)
Purchased by the
customer
H
Home load
switch
Recommended: a 2-pole AC circuit breaker with a rated
voltage greater than or equal to 240 V AC and a rated current
of:
20 A (SUN2000-3.8KTL-USL0)
25 A (SUN2000-5KTL-USL0)
40 A (SUN2000-7.6KTL-USL0)
50 A (SUN2000-9KTL/10KTL-USL0)
60 A (SUN2000-11.4KTL-USL0)
Purchased by the
customer
Note a: There are two ground points (power grid side and user side) for residential power distribution in the
U.S. If the general loop to residence has a leakage protection device, there may be a risk of misprotection.
Connecting the SUN2000 may increase the risk. It is recommended that the leakage protection device be
relocated to a branch not involving the SUN2000.
Compatibility with RCD and RCM
The SUN2000 is equipped with a residual current monitoring unit (RCMU). Its external
AC switch (G and F in
Figure 5-2
) should be a 2-pole circuit breaker or any other AC load
circuit breaker to safely disconnect the SUN2000 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.