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3.4 Safety aspects & applicable standards
To provide additional safety, the mains grid and solar modules are galvanically
isolated from one another. Furthermore, both the phase and the neutral conduc-
tor of each inverter are fitted with a fuse. The fuses for both the master and the
slave are placed in a position in the junction box of the master which is eas-
ily accessible. The inverter is compliant with the requirements of all applicable
standards relating to electromagnetic compatibility (EMC) and safety equipment.
The StecaGrid also conforms to the directives regarding the operation of energy-
generating systems parallel to the low voltage grid of the regional power supply
company. The CE symbol can be found on the type plate of the inverter.
The inverter checks grid quality by measuring the grid voltage and grid fre-
quency as well as (applicable to Germany, etc.) system impedance. When there
are faults in the grid, the inverter will automatically disconnect itself from the
grid.The values at which the inverter disconnects itself from the grid vary from
country to country; the following table provides an overview of values for each
country:
Grid voltage
(Disconnection value)
Default
-10 % / + 6 % of the
rated voltage (0,1 s)
3100
-10 % / +10 % of the
Netherlands
rated voltage (0,1 s)
3200
-0 % / +6 % of the
Belgium
rated voltage (0, s)
3300
-0 % / +15 % of the
France
rated voltage (0, s)
3400
-15 % / +10 % of the
Spain
rated voltage (0, s)
4400
-10 % / +15 % of the
Great Britain
rated voltage (1,5 s)
4900
-0 % / +15 % of the
Germany
rated voltage (0, s)
4901
-0 % / +15 % of the
Germany
rated voltage (0, s)
When installing the inverter, the country of installation must be selected. The
'Switching the grid voltage on for the first time' section explains how to select
the correct country setting.
If your country is not shown in the current list of countries, it may be possible
to use the settings of another country. Our hotline can give you the necessary
information about this. The number is: +49 (0) 700 7834743.
* only available for the StecaGrid 000+ D Master-M model.
3.5 Data communication
In order to provide an easy overview of the system functions, voltage, current,
solar generator output, grid frequency and grid voltage, among other values,
are measured within the inverter. The energy yields of both the master and slave
units are also stored on a daily, monthly and yearly basis.
These measurements and the operating modes of the StecaGrid can be read on
the display. Using the optional StecaGrid software (StecaGrid Connect User) and
a network interface card (StecaGrid Connect), you can download the StecaGrid
data and process it on a PC. If the inverter has a permanent Internet connection,
then the data can be accessed via a web browser from any location using this
card and a corresponding password. These features allow complete, integrated
monitoring of the solar power system. Further information, etc. about installa-
tion and commissioning can be found in the separate operating instructions.
76.439 | 10.04
Grid frequency
System imped-
(Disconnection value)
ance
monitoring
+/- 0, Hz of the
Yes, in accord-
rated frequency (0, s)
ance with
VDE 016-1-1*
+/- Hz of the
Not applicable
rated frequency ( s)
+/- 0, Hz of the
Yes, in accord-
rated frequency (0, s)
ance with
VDE 016-1-1*
- ,5 / + 0, Hz of the
Not applicable
rated frequency (0, s)
+/- 1 Hz of the
Not applicable
rated frequency (0, s)
+/- 1 Hz of the
Not applicable
rated frequency (0,5 s)
- ,5 / + 0, Hz of the
Yes, in accord-
rated frequency (0, s)
ance with
VDE 016-1-1*
- ,5 / + 0, Hz of the
Nicht zutreffend 30 s
rated frequency (0, s)
Reconnec-
tion-time
180 s
0 s
30 s
30 s
180 s
180 s
30 s
33
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