SMA SUNNY BOY 2000HF - Page 37

SMA Solar Technology AG Electrical Connection
Installation Manual SB20HF-30HF-IA-IEN120431 37
Load Disconnection Unit
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81).
Detailed information and examples for the rating of a miniature circuit‑breaker can be found in the
Technical Information "Miniature Circuit‑Breaker" in the SMA Solar Technology AG download area
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. It can 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 current from the inverter and the power distribution grid can accumulate
to overcurrents which is not detected by the miniature circuit‑breaker.
• Never connect loads between the inverter
and the miniature circuit‑breaker without
fuse protection.
• Always protect consumers 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 switch‑disconnector. A screw type fuse only acts as cable
protection.
When disconnecting under load using a screw type fuse, the inverter can be damaged.
• Use only a switch‑disconnector or a miniature circuit‑breaker as a load disconnection
unit.