SMA WB 5000 Installation - Manual (Page 20)

Installation requirements SMA Technology AG
Page 20 WB50_60-11:SE4005 Installation Guide
Rating for a line circuit breaker
Various factors should be taken into account when selecting line circuit breakers.
These include, for example:
• The type of cable used (conductor material and insulation)
• Ambient temperatures affect the cables (higher temperatures result in a reduced
maximum current load)
• Method of routing the cable (reduces the maximum current load)
• bundling cables together (reduces the maximum current load)
• Loop impedance [Z] (in the event of a body contact this limits the current that can
flow and therefore determines the response behavior of the circuit breaker)
• Adequate separation between the circuit breakers to avoid excessive heating
• Selectivity
• Protection class of the connected load (VDE 0100, part 410), „Protection against
electric shock“ 1 and / or the international standard IEC 60364-4-41:1992
When installing the fuses, please take the information in the manufacturer's
data sheets into account, e.g. in terms of installation distance and heat impact.
The following standards should be followed in all cases:
• DIN VDE 0298-4 1 („Cable routing and current-carrying capacity)“
• DIN VDE 0100; part 430 1 („Protection measures for protection of cables
and conductors in terms of overcurrent“) and / or the international
standard IEC 364-4-43:1977 and IEC 364-4-473:1977
• DIN VDE 0100; part 410 1 („Protection against electric shock“) and / or
the international standard IEC 60364-4-41:1992
1. The standards mentioned above are to be only used as a guideline for your
installation. They apply for installations in Germany. Please note that other
standards will apply for different countries throughout the world.