Figure2-10 Electrical block diagram
11
12
MASTER DSP
SLA
VE DSP
D
C S
W
IT
C
H
A
n
ti-
g
ra
ft
p
ro
te
c
tio
n
A
n
ti-
g
ra
ft p
ro
te
c
tio
n
O
V
P
D
C S
P
D
III
O
V
P
D
C S
P
D
III
IN
1
A
(-)
IN
1
B
(-)
IN
1
C
(-)
M
P
P
T
1
D
C
/D
C
INPUT EMI FILTER
M
P
P
T
D
C
/D
C
OUTPUT EMI FILTER
A
C S
P
D
III
E
A
R
T
H
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
+
-
+
-
+
-
+
+
-
-
+
-
+
-
IN
1
IN
2
IN
1
A
(+
)
IN
1
B
(+
)
IN
1
C
(+
)
IN
1
A
(-)
IN
1
B
(-)
IN
1
C
(-)
IN
2
A
(+
)
IN
2
B
(+
)
IN
2
C
(+
)
IN
2
A
(-)
IN
2
B
(-)
IN
2
C
(-)
IN
1
(+
)
IN
1
(-)
IN
2
(-)
IN
2
(+
)
IN
1
(+
)
IN
1
(-)
IN
2
(-)
IN
2
(+
)
D
C C
A
B
L
E G
L
A
N
D
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
(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
0
/S
1
/S
2
/S
3
/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
IN
1
A
(+
)
IN
1
B
(+
)
IN
1
C
(+
)
IN
2
A
(+
)
IN
2
B
(+
)
IN
2
C
(+
)
IN
2
A
(-)
IN
2
B
(-)
IN
2
C
(-)
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
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 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
E
.
Monitoring string inputs
The inverter can monitor and display the voltage and current of each individual string input. It also checks the
status of the strings and generates a warning in the event of a fault.
20~33KTL-G2
User manual
20~33KTL-G2
User manual