SMA
Technologie AG
Safety Instructions
Installation manual
SC-100-13:SE2407
Page 7
3.6 Installation
The information contained in the installation guide must be observed when installing the
inverter. The SC 100 Indoor is designed for indoor installation, with a protection rating
of IP21. The SC 100 Outdoor is designed for outdoor installation, with a protection
rating of IP44/54. The device must be installed in a manner such that the proper
electrical connections, adequate ventilation, and adequate fire protection are possible.
The Sunny Central SC100 Outdoor product line has been type-tested and approved
for outdoor installation in accordance with the industry-standard EMC limits (EMC =
Electro Magnetic Compatibility).
3.7 Special Hazards of Photovoltaic Systems
Photovoltaic systems have special characteristics representing special hazards:
•
An active power source is connected. This means that, depending on the
operating mode, there may be voltage present, either from the photovoltaic
generator and/or the Sunny Central. This is especially important to note when
disconnecting particular parts of the system
•
Very high DC voltages are present (no zero-crossing) which, in case of a fault or
inappropriate use of fuses or plugs, may lead to arcing.
•
The short-circuit current of the photovoltaic generator is only slightly more than the
maximum operating current and is also dependent on the level of solar irradiation.
This means that, if a short circuit occurs in the system, the existing circuit breakers
are not guaranteed to switch off.
•
A highly branched generator array may be difficult to disconnect if a fault
develops (e.g. short circuit). We recommend the extra use of external DC circuit
breakers for disconnecting the inverter and/or the DC main cables / Sunny String
monitors (DC circuit breakers optionally available). One circuit breaker should be
allocated to each input, and these should be located near to the Sunny Central,
as described in the standard VDE 0100 part 7-712 and the VDI 6012 regulations.
Please observe the additional information on installing the SC 100 Outdoor
located in
Appendix C
.
An active power source is connected!
