Overcurrent Protection Using Fuses And Circuit Breakers - Siemens SINAMICS S220 Equipment Manual

4.2

Overcurrent protection using fuses and circuit breakers

You must use line fuses or circuit breakers for overcurrent protection. The following protective
elements can result in reductions.
Detailed specifications regarding protective devices and their respective short-circuit current
rating values can be found in the Product Information "Protective Devices for S220 Line Modules
Booksize (https://support.industry.siemens.com/cs/ww/en/view/109804134)".
Electric shock or fire due to overcurrent protective devices that trip too late or not at all
Overcurrent protective devices that trip too late or not all can cause electric shock or fire.
• In the case of a conductor-conductor or conductor-ground short-circuit, ensure that the
• You must additionally use a residual current device (RCD) if, for a conductor-ground short
• The short-circuit current must not exceed the SCCR of the converter and the breaking
Booksize power units
Equipment Manual, 01/2022, 6SL3097-6AC30-0BP0
WARNING
short-circuit current at the point where the converter is connected to the line supply
corresponds as a minimum to the requirements of the protective device used.
circuit, the required short-circuit current is not reached. The required short-circuit current
can be too low, especially for TT line supply systems.
capacity of the protective device.
Line connection and line-side power components
4.2 Overcurrent protection using fuses and circuit breakers
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