Short-circuit rating of electrical equipment according to IEC

An overview of the main requirements for the short-circuit protection of electrical equipment and systems

Machines, their control cabinets and other types of electrical equipment must be designed and dimensioned in accordance with their electrical power supply as well as with the physical environmental and operating conditions prevailing on site. Besides fault-free operation under normal operating conditions, the objective also includes protection against damaging effects in the event of a fault. Such a fault may, for example, consist of a short circuit in the electrical equipment.
On the basis of standards, this Siemens White Paper explains the measures needed to prevent injury to persons and animals and damage to equipment, and also shows how the corresponding verification may be provided.

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