Adapter cable: YJV/YJLV series three-core cable (section 25-400mm²), voltage class 10kV, in line with GB/T 18889 and IEC 60502-2 standards, designed for indoor scenarios such as substations and data centers. Electrical test: power frequency voltage 42kV/5min no breakdown, lightning impact voltage 95kV (GB/T 3048.8); Mechanical strength: Axial tensile strength ≥180N (IEC 61479), withstand the mechanical vibration of the switch cabinet (5-200Hz/3g acceleration). Compact design: the outer diameter is 45% smaller than the traditional porcelain sleeve (Φ85mm), suitable for KYN28A-12 switchgear; Intelligent identification: Preset red/yellow/green phase identification ring (according to IEC 60446), error rate is reduced by 98%.