In power transmission, substation safety protection and industrial electrical systems, surge arresters and lightning arresters are often regarded as the same equipment. Professional power equipment manufacturers elaborate on their core differences, merits and demerits to help you make proper selection.
Lightning Arrester
It is mainly used for direct lightning strike protection, commonly installed on high-voltage transmission lines, power towers, transformers and substations. Featuring super large discharge capacity, it can safely guide heavy direct lightning current into the ground and prevent main power equipment from insulation breakdown.
Advantages: Strong direct lightning protection capacity, wide protection coverage, stable operation under high voltage, long service life.
Disadvantages: Relatively slow response speed, high residual voltage, unsuitable for precision electronic components, bulky structure.
Surge Arrester
It is designed to suppress transient overvoltage, resisting induced lightning, switching surges and power grid voltage fluctuations. Widely applied in low-voltage power distribution, photovoltaic power stations, communication base stations and precision equipment rooms, it adopts nanosecond-level response and low residual voltage to effectively protect chips and circuit boards.
Advantages: Fast response, accurate voltage limiting, compact size, easy installation, wide application range, low maintenance cost.
Disadvantages: Limited discharge capacity, unable to withstand direct lightning strikes independently, required to be used together with lightning arresters.
In a complete lightning protection system, lightning arresters serve as the first line of defense against direct lightning, while surge arresters act as the second line to protect precision equipment. The combined use of both can maximize electrical safety.
