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Electrical Connection SMA Technologie AG
Page 40 SMC50A_60A-IEN073320 Installation Guide
6. Line Circuit Breaker
The selection of the correct line circuit breaker depends on various factors. For
detailed information for the rating of a line circuit breaker, please refer to section
6.4.3 "The Line Circuit Breaker" (Page 44).
No loads should be connected to this
power circuit!
A circuit breaker's load disconnecting properties can be utilized to disconnect the
inverter from the grid under load.
A screw fuse element, e.g. D system (Diazed) or D0 system (Neozed) has no load
disconnecting properties, and thus may be used as cable protection, but not as a
load disconnection device.
Upon disconnection under load, the fuse element may be destroyed, or its
functionality may be inhibited by contact burning.