7.4
Additional grounding connection
If prescribed, the inverter can be grounded via an additional stud bolt. A grounding terminal for the
stud bolt is optionally available; see Fig. 5, p. 47.
7.5
Cooling
The internal temperature control system prevents excessive operating temperatures. If the internal
temperature of the inverter exceeds the (derating) limit then the amount of power taken from the
solar modules is automatically adjusted. This reduces the heat emission from the inverter and pre-
vents the operating temperature from becoming too high.
The inverter is cooled at the rear by cooling fins and 2 maintenance-free fans.
7.6
Grid monitoring
The inverter constantly monitors the mains grid parameters while feeding the grid. If the grid devi-
ates from the legally prescribed specifications then the inverter automatically switches off. When
the grid conforms to the legally prescribed specifications then the inverter automatically switches on
again.
The legally prescribed specifications for the grid parameters are described in the
Table of coun-
tries
, p. 78.
7.7
Data communication
7.7.1
Displayed data
The inverter displays the following data:
•
Voltage and current of the solar generator
•
Power and current fed into the grid
•
Voltage and frequency of the power grid
•
Energy yields on a daily, monthly and annual basis
•
Error conditions, notes
Some of this data can be sent to the devices listed under 7.7.3.
7.7.2
Logged data
The inverter stores the following data permanently in internal memory (EEPROM):
•
Error conditions, notes
•
Energy yields on a daily, monthly and annual basis (Tab. 7).
The storage resolution of the energy yield data is as follows:
Energy yield data
Storage resolution/
period
10-minute values
31 days
Daily values
12 months
Monthly values
30 years
Annual values
30 years
Total yield
permanent
Tab. 7: Storage resolution of the energy yield data
7.7.3
Interfaces and connected devices
The inverter communicates with other devices via an RS485 bus. The following applies:
•
The inverter has two RS485 interfaces on the lower side of the casing (HARTING RJ45 sockets
with PushPull locking mechanism).
•
The beginning and end of the RS485 bus must be terminated; see also 7.7.5.
•
A data cable is supplied with each inverter (1.5 m long, HARTING RJ45 plug with PushPull locking
mechanism). Use an
alternative data connection cable
for longer connections; see 7.7.4.
•
The inverters connected to the RS485 bus operate as bus slave units.
Note
The following inverters have compatible data interfaces and can also be connected to the RS485 bus
as slaves: StecaGrid 3000, 3600, 8000, 10 000. Observe the manuals of these devices concerning the
definition of addresses, termination and permissible data cables.
•
If an
optional device
is connected to the bus, then this device operates as a bus master.
•
Only 1 master may be connected to the RS485 bus at any given time.
54
744.378 | 12.13
EN
Содержание StecaGrid 10 000+ 3ph
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