The you are aiming for (Class A, B, or C)?
The enclosure can withstand the sudden pressure wave without exploding violently.
Ensures personnel are safe AND the arc damage is restricted to a localized area inside the board. Criteria 1 to 6 iec 61641 pdf
Extremely fast mechanical devices that deliberately create a solid three-phase short circuit upstream of the fault upon detecting an arc, extinguishing the plasma arc instantly. Why You Need the IEC 61641 Document
An internal arcing fault is one of the most destructive events that can occur within a low-voltage switchgear assembly. Temperatures can exceed 15,000°C, instantly vaporizing metal components, destroying equipment, and placing maintenance personnel at severe risk of injury or death. The you are aiming for (Class A, B, or C)
The (Technical Report) is a critical guideline for testing low-voltage switchgear assemblies under internal arcing conditions. Its primary "solid feature" is the Arc Ignition Protected Zone (Class I) , which uses solid insulation to ensure that the initiation of an arcing fault is a remote possibility. Key Features and Classifications
(Permissible Arcing Current): The RMS value of the short-circuit current (e.g., 50 kA, 65 kA) used during the test. Criteria 1 to 6 Extremely fast mechanical devices
Validates that an operator standing near the switchgear is safe from the effects of the arc. Criteria 1 to 5
The enclosure must remain connected to its earthing point. Technical Parameters