Fuses And Cable Cross−Sections - Lenze MOBILE DCU Hardware Manual

5.5.2 Fuses and cable cross−sections
Installed cables have to be protected against short circuit and overload. The execution of
these protective measures essentially depends on the available energy sources (generator,
memory, connection to supply system, etc.) and is the responsibility of the vehicle
manufacturer or the equipment suppliers.
Fuses and circuit breakers have to be dimensioned in such a way that the occurring
short−circuit currents caused by the internal resistances of the energy sources are
sufficiently high to safely trip the fuses. Otherwise, there is no reliable switch−off in case
of short circuit.
When dimensioning fuses, consider the ambient conditions in such a way that the cables
are protected from overload in the entire temperature range. Here, the type of installation
and cooling of the cables have to be considered sufficiently.
If a memory with battery management is available that can switch off the short−circuit
current reliably, no fuses are needed. In this case, the cables of the MOBILE devices have to
be protected from overload by a suitable parameter setting.
EDSMDAG EN 2.0
Electrical installation
Fuses and cable cross−sections
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Installation 5
51