SMA SB 2500TL-21 Installation - Manual (Page 31)

SMA Solar Technology AG Electrical Connection
Installation Manual SB25-30TLST-21-IA-en-13 31
You must install a separate miniature circuit-breaker for each inverter in order to ensure that the
inverter can be securely disconnected under load. The maximum permissible fuse protection can be
found in Section 13 "Technical Data" (page 85).
For detailed information and examples of miniature circuit-breaker design, see the Technical
Information "Miniature Circuit-Breaker" at www.SMA.de/en.
DANGER!
Danger to life due to fire
When more than one inverter is connected in parallel to the same miniature circuit-breaker,
the protective function of the miniature circuit-breaker is no longer guaranteed. This could
result in a cable fire or destruction of the inverter.
• Never connect several inverters to the same miniature circuit-breaker.
• Observe the maximum permissible fuse protection of the inverter when selecting the
miniature circuit-breaker.
DANGER!
Danger to life due to fire
When a generator (inverter) and a load are connected to the same miniature circuit-
breaker, the protective function of the miniature circuit-breaker is no longer guaranteed.
The currents from the inverter and the electricity grid can accumulate to form overcurrents
which are not detected by the miniature circuit-breaker.
• Never connect loads between the
inverter and the miniature circuit-breaker
without fuse protection.
• Always fuse loads separately.
NOTICE!
Damage to the inverter by using screw-type fuses as a load disconnection unit
A screw-type fuse, e.g. DIAZED fuse or NEOZED fuse, is not a switch-disconnector and thus
may not be used as a load disconnection unit. A screw-type fuse only acts as cable
protection.
If the inverter is disconnected under load using a screw-type fuse, the inverter may be
damaged.
• Use only a switch-disconnector or a miniature circuit-breaker as a load disconnection
unit.