Reasons for the failure of medical high-voltage cables
Everyone is curious about the reasons for the failure of medical high-voltage cables. The following editor will talk about the reasons for the failure of medical high-voltage cables.
Reasons for the manufacture of cable bodies: In the process of cable production, problems such as insulation eccentricity, uneven thickness of insulation shielding, insulation impurities, protruding inner and outer shielding, uneven cross-linking, cable moisture, and poor sealing of cable metal sheath are prone to occur.
2. Reasons for the manufacture of cable joints: Due to the limitations of site conditions and production processes, there will inevitably be air gaps and impurities between the insulating tape layers. The reasons for the failure of the cable joint are the manufacturing defects of the stress cone, the insulation filling problem, the oil leakage of the sealing ring, etc.
3. Cable grounding system: due to the poor sealing of the box, the multi-point grounding leads to an excessively large induced current in the metal protective layer; the instability of the zinc oxide crystal can also easily cause damage to the protective layer protector.
4. Reasons for construction quality: the site conditions are relatively poor; the insulation during the construction of the joint is exposed to the air; the installation is not constructed in strict accordance with the process; the DC withstand voltage test forms a reverse electric field in the joint, causing insulation damage; due to poor sealing treatment Caused.
5. Design reason: The cable is squeezed and damaged due to the thermal expansion of the cable.
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