The 21kV porcelain arrester adopts advanced voltage grading design and high-purity zinc oxide ceramics, achieving ultra-precise overvoltage clamping (error ≤±3%). Its optimized nonlinear characteristic ensures no follow current after surge suppression, providing comprehensive protection for 21kV power equipment against lightning and switching transients.

Crafted with high-density alumina porcelain housing, this arrester boasts exceptional resistance to mechanical impact and electrical erosion. It operates stably in extreme conditions including high altitude (≤4500m), strong UV radiation, and heavy salt fog, maintaining reliable performance without degradation for over 10 years.

Beyond basic lightning protection, this 21kV porcelain arrester features low power consumption (leakage current ≤10μA) and easy maintenance. It reduces long-term operational costs by minimizing downtime and replacement frequency, making it a cost-effective choice for substations, industrial parks, and rural power grids.

    Technical Data Sheet

   Test Equipments