Short-circuit fault: There are two-phase short-circuit and three-phase short-circuit, which are mostly caused by hidden dangers left in the manufacturing process.
Grounding fault: A core or several cores of the cable are broken down to the ground. The insulation resistance is lower than 10kΩ, it is called low resistance grounding, and higher than 10kΩ is called high resistance grounding. Mainly caused by cable corrosion, lead cracks, dry insulation, joint technology and materials.
Broken linear fault: a core or several cores of the cable are completely broken or incompletely broken. Cables that are affected by mechanical damage, terrain changes, or short-circuits can cause disconnection.
Mixed failure: the above two types of failures.
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