SMA STP 15000TL Installation - Manual (Page 30)

Electrical Connection SMA Solar Technology AG
30 STP20TLHE-IA-IEN122222 Installation Manual
Load disconnection unit
You must install a separate, 3-phase 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).
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 multiple 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 electricity grid can accumulate to 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 protect loads separately.
NOTICE!
Damage to the inverter caused by use of screw-type fuses as load-disconnect
units!
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.