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4
Installation
WARNING
Risk of death by electrocution!
The StecaGrid inverter may only be connected to the grid by qualified person-
nel in accordance with the regulations of IEC standard 60364. The regulations
of the local power supply company.
When working on the solar system, disconnect the inverter from the power
supply.
Make sure that the power supply cannot be unintentionally switched on.
Do not interrupt the DC connection between the solar modules and from the
solar modules to the inverter while current is flowing. If the DC connection has
to be interrupted, always disconnect the inverter from the grid first.
Lay the cable such that the connection cannot come loose accidentally.
Press the MC connection together until it audibly snaps into place.
4.1 General requirements for installation
When using several inverters in a phase, the maximum permitted connected load
in Germany is 4.6 kVA. Higher outputs must be distributed onto several phases.
When loads are distributed onto several phases, however, phase inequality must
not be more than 4.6 kVA. Please refer to the national and/or regional regula-
tions regarding details about the connection conditions.
This essentially means that each inverter or group of inverters must be connect-
ed to its own fuse group in the electrical installation by way of a mains switch/
mains isolation switch. The mains switch must be located in the same room as
the inverter and have sufficient switching capacity. In this case, the photovoltaic
system must be viewed as a load on the power grid.
An exception to this is when the inverter(s) is (are) also in the low-voltage distribu-
tion room; in this instance a separate switch is not required, because the relevant
group switch can take on this function.
In all Cenelec countries (Netherlands, Germany, Spain, Italy, etc.) a DC circuit
breaker is also required.* You can obtain this DC circuit breaker from Steca via
your dealer if desired. The nominal voltage of the DC circuit breaker must be at
least 500 V.
The installer must ensure that all applicable installation regulations, national
laws, installation standards and connection load values of the regional power
supply company are adhered to.
* See IEC Standard IEC60364-7-71 for further information.
Cable cross-section and fuse:
P Nom
Cross-section
2 kW
1,5 mm²
4 kW
,5 mm²
6 kW
4 mm²
4.2 Notes on installation
CAUTION
Damage to the inverter!
Do not install the inverter:
•
In rooms which are too hot
•
In dusty rooms
•
In rooms where highly flammable gas mixtures can occur
Keep the cables of the solar modules as short as possible.
Do not install the inverter in locations where it will be subjected to vibration.
Do not block the air flow which cools the inverter. A space of at least 0 cm
must be left above and below the device to allow air to circulate around the
device.
The electrical connections must be made in the correct order:
1. Connect the equipment to the grid
8
Fuse
B16
B5
B3
EN
731.614 | 10.04
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