C
.
Grid monitoring
Continuous monitoring of the grid voltage to ensure the voltage and frequency values stay within operating
limits.
D
.
Inverter internal device protection
The inverter has all kinds of internal protection to protect the device inside when grid or input DC side have
abnormal situation.
E
.
Ground fault protection
This inverter must be used with panels connected with “floating” connections, that is, with positive and negative
terminals without ground connections. An advanced ground fault protection circuit continuously monitors the
ground connection and disconnects the inverter when a ground fault is detected. The ground fault condition is
indicated by a red LED on the front panel.
2.4 Efficiency and derating curve
Efficiency curve
Input voltage derating curve
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Shenzhen SOFARSOLAR Co ., Ltd.
C
13
All rights reserved
Shenzhen SOFARSOLAR Co ., Ltd.
C
14
User manual
User manual
Product characteristics
Product characteristics
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 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 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.
E
.
Monitoring string inputs
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).
F
.
Monitoring surge arresters (S1,S2 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.
Output voltage derating curve
Vpv=450V
Vpv=600V
Vpv=800V
5% 10% 20% 30% 40% 50% 60% 75% 80% 90% 100%
% of Rated Output Power
86
88
90
92
94
96
98
100
Ef
ficiency[%]
250 350 440 500 600 700 850 900 950
0
10000
15000
20000
25000
30000
35000
40000
Output Power vs Input Voltage
Output Power(W)
Vin(V)
Output Power vs Grid Voltage
4000
8000
12000
16000
20000
24000
40000
28000
32000
36000
180 190 200 210 220 230 240
Vgrid(V)
250
270 280
260
Output Power(W)
0
320
300
290
310
Sofar 30K~40KTL
Sofar 30K~40KTL
Document Version 1.0(2015.08.06)
Document Version 1.0(2015.08.06)
Компания
«
Реалсолар
»,
Санкт
-
Петербург
,
Октябрьская
наб
.,
д
. 104,
к
. 1,
лит
.
П
www.realsolar.ru +7911-921-52-96
