IEC 60099-4:2014 Surge arresters-Part 4: Metal-oxide surge aresters without gaps for a.c. systems

IEC 60099-4:2014 is an international standard specifying technical requirements, test methods, and performance criteria for gapless metal-oxide surge arresters (MOSAs) used in alternating current (a.c.) power systems. It focuses on arresters designed to protect electrical equipment from transient overvoltages, such as those caused by lightning or switching operations, by leveraging the nonlinear voltage-current characteristics of metal-oxide materials. The standard defines key parameters including rated voltage, residual voltage, discharge capacity, and thermal stability, while outlining uniform testing procedures to verify arrester reliability under normal and fault conditions—ensuring consistency in product performance across global markets.

This standard applies to gapless MOSAs for a.c. systems with nominal voltages ≥1 kV, covering design, manufacturing, and conformity assessment aspects. It addresses critical requirements such as mechanical strength, environmental resistance (e.g., temperature, humidity), and aging characteristics to guarantee long-term operational safety. Additionally, IEC 60099-4:2014 aligns with other IEC standards (e.g., IEC 60099-1) to establish a comprehensive framework for surge arrester qualification, facilitating interoperability between arresters and power system components. It serves as a foundational reference for manufacturers, utilities, and certification bodies to ensure products meet global safety and performance benchmarks, supporting the reliable operation of electrical grids worldwide.

LISUN supplies the fully test solutions for the following IEC 60099-4:2014, please see the below excel table:

LS9923 Programmable Withstanding Voltage & Insulation Tester

SUG255 Impulse Voltage Generators | Impulse Generators

LS-RVT-2000W Residual Voltage Tester | Peak Power Cutoff Device

JCY-2 IEC 60884.1 IEC 60669-1 Clause 12.3.12 Screwless Terminal Deflection/Bending Test Device

GDJS-015B Temperature Humidity Chamber | Thermal Chamber

YWX/Q-010 Salt Spray Test Chamber | Salt Fog Corrosion Tester

UV-263LS UV Aging Test Chamber