Figure2-12 Electrical block diagram
All rights reserved
Shenzhen SOFARSOLAR Co ., Ltd.
C
11
All rights reserved
Shenzhen SOFARSOLAR Co ., Ltd.
C
12
MASTER DSP
SLA
VE DSP
D
C S
P
D
II
E
A
R
T
H
D
C S
P
D
II
E
A
R
T
H
S
4
/S
5
D
C S
P
D
S
2
/S
4
/S
5
D
C S
W
IT
C
H
O
V
P
D
C S
P
D
II
I
O
V
P
D
C S
P
D
II
I
M
P
P
T
1
D
C
/D
C
IN
PU
T E
MI F
ILT
ER
M
P
P
T
D
C
/D
C
OU
TP
UT
EM
I FIL
TE
R
A
C S
P
D
II
I
E
A
R
T
H
A
C S
P
D
II
S
5
A
C S
P
D
L
1
L
2
L
3
N
P
E
P
E
L
1
L
2
L
3
N
A
C O
u
tp
u
t t
e
rm
in
a
l s
ta
tio
n
P
E
L
1
L
2
L
3
N
L
1
L
2
L
3
N
L
1
L
2
L
3
N
1
R
LY
E
A
R
T
H
IN
V
E
R
T
E
R
D
C
/A
C
IN
2
IN
1
+
-
+
-
+
-
+
+
-
-
+
-
+
-
P
V C
O
N
N
E
C
T
O
R
D
C I
n
p
u
t t
e
rm
in
a
l s
ta
tio
n
IN
1
(+
)
IN
1
(-
)
IN
1
(-
)
IN
2
(+
)
IN
1
(+
)
IN
1
(-
)
IN
1
(-
)
IN
2
(+
)
S
D C
a
rd
R
S
4
8
5
W
IF
I/
G
P
R
S
(O
P
T
)
R
S
4
8
5
M
A
R
K
M
A
R
K
M
A
R
K
U
p
p
e
r p
a
rt o
f t
h
e c
a
s
e
L
o
w
e
r p
a
rt o
f t
h
e c
a
s
e
O
P
T
IO
N
A
L
M
a
c
h
in
e t
y
p
e
s S
2
S
4
/S
5
R
E
M
O
T
E C
O
N
T
R
O
L
A
L
A
R
M
+
T
/R
-T
/R
G
N
D
G
N
D
+
R
N
.C
N
.O
C
图
2-12
电路框图
IN
1
A
(+
)
IN
1
B
(+
)
IN
1
A
(-
)
IN
1
B
(-
)
IN
2
A
(+
)
IN
2
B
(+
)
IN
2
A
(-
)
IN
2
B
(-
)
IN
1
A
(+
)
IN
1
B
(+
)
IN
1
A
(-
)
IN
1
B
(-
)
IN
2
A
(+
)
IN
2
B
(+
)
IN
2
A
(-
)
IN
2
B
(-
)
A
.
Configurable relay
B.1 Remote switching on/off
Function module
The inverter has a configurable switching relay that can be used in various operating
conditions set in the dedicated menu. A typical application example is the closing of the
contact when an alarm occurs.
B
.
Energy management unit
2
.
3
Protection modules
This control can be used to switch the inverter on/off through an external (remote) control.
B.2 Feeding reactive power into the grid
The inverter is able to produce reactive power and can therefore feed it into the grid through the setting of the
phase shift factor. Feed-in management can be controlled directly by the grid company through a dedicated
RS485 serial interface.
B.3 Limiting the active power fed into the grid
The inverter, if enabled can limit the amount of active power fed into the grid by the inverter to the desired value
(expressed as a percentage).
B.4 Self power reduction when grid over frequency
When the grid frequency is over limited value, inverter will reduce output power which do good to the grid
stability.
B.5 Power reduction due to environmental conditions, input output voltage
The power reduction value and the inverter temperature at which it occurs depend on the ambient temperature
and on many operating para-meters. Example: input voltage, grid voltage and power available from the
photovoltaic field. The inverter can therefore reduce the power during certain periods of the day and according to
the value of these parameters.
The inverter or a grid of inverters may be monitored remotely through an advanced communications system
based on an RS485 serial interface, or remotely via the WIFI.
C
.
Data transmission
SD card is used for updating the firmware
.
D
.
Software update
The inverter monitors the status of the surge arresters (both AC and DC) and generates a warning in the event of a
fault (visible on the display).
E
.
Monitoring surge arresters (S4,S5 versions only)
A
.
Anti-islanding
In the event of a local grid outage by the electricity company, or when the equipment is switched off for
maintenance operations, the inverter must be physically disconnected safely, to ensure protection of people
working on the grid, all in accordance with the relevant national standards and laws. To prevent possible
islanding, the inverter is equipped with an automatic protective disconnection system called “Anti-Islanding”.
B
.
RCMU
Sofar inverters are equipped with a redundancy on the reading of the ground leakage current sensitive to all
components of both direct and alternating current. Measurement of the ground leakage current is carried out at
the same time and independently by 2 different processors: it is sufficient for one of the two to detect an anomaly
to trip the protection, with consequent separation from the grid and stopping of the conversion process.
SOFAR 10K~20KTL
User manual
SOFAR 10K~20KTL
User manual
