6.7. Protections
6.7.1. Short circuit
SD700 includes from frame 5 to 11 ultra fast fuses as standard. Frame 5 includes one fuse per
phase with a rated current that depends on the drive’s nominal current. Frames 6 on are constructed
through the parallel connection of frame 5 so the fuses per phase in those frames correspond with
the number of parallel drive modules (frame 5) interconnected. The breaking capacity of the fuses
and the rated current is described in the following table.
Therefore, it is not recommended to install the drive in points where the short-circuit current
available is higher than 200kA. If so, install general fuses with a greater breaking capacity and with
fastest overcurrent capacity.
Acquiring frames 1 to 4, the installer must select a protection according to the characteristics
mentioned previously.
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