4.11
External AC Circuit
Breaker and Residual
Current Device
Please install a circuit breaker to ensure the inverter is able to disconnect
from grid safely. The inverter is integrated with a RCMU, however, an
external RCD is needed to protect the system from tripping, either type A
or type B RCD are compatible with the inverter.
The integrated leakage current detector of inverter is able to detect the
real time external current leakage. When a leakage current detected
exceeds the limitation, the inverter will be disconnected from grid quickly,
if an external residual current device is connected, the action current
should be 30mA or higher.
Caution：For safety operation and regulation compliance, it is requested to install
a breaker (32A) between grid and inverter.
30
29
CT
wir
e Corr
esponding port in met
er
IA
(whit
e) 13
iA
(blue) 14
IB (whit
e) 16
IB (
blue) 17
IC (whit
e) 19
IC (
blue) 21
B
at
te
ry
SE
T
SE
C
1
4
7
1
0
13
14
16
17
19
2
1
24
25
3
6
9
1
0
M
et
er
O
n-
gr
id
L
oa
d
G
ri
d
B
ac
k-
up
L
oa
d
P
ow
er
M
et
er
BM
S
Rs4
85
AC
B
rea
ker
A
C
B
re
ak
er
C
T-
A
C
T-
B C
T-
C
