Medium-voltage power cables serve as core components in urban power grids, industrial power distribution systems, and the transmission infrastructure for large-scale facilities; their operational reliability is directly linked to the safety of power supply and the stability of the entire system. Conducting professional and systematic testing of these cables is an essential technical measure for ensuring the long-term, safe, and economical operation of power networks.
Such testing encompasses the entire lifecycle of a cable-from manufacturing and installation to final acceptance and ongoing in-service operation and maintenance. Its primary function is to scientifically evaluate the cable's electrical performance, mechanical integrity, and material aging status. This enables the timely detection of latent defects and insulation degradation, effectively preventing serious incidents such as electrical breakdowns, short circuits, and fires. Consequently, this safeguards both personnel and equipment while minimizing losses caused by unplanned power outages. Furthermore, testing serves as a critical element in quality control, product certification, and compliance with mandatory national and industry regulations, providing precise data to support condition-based maintenance and the assessment of a cable's remaining service life.
