Lightning Protection Element Tester Surge Protector Tester SPD Tester or Varistor



Lightning Protection Element Tester (also known as "Surge Protector Tester", "SPD Tester" or "Varistor/Discharge Tube Tester") is a professional instrument specifically used to detect the electrical performance of lightning protection components (such as varistors MOV, gas discharge tubes GDT, transient suppression diodes TVS, etc.). During thunderstorm seasons or after thunderstorms, lightning protection components may age, fail, or even short-circuit/open-circuit due to multiple operations. This instrument can quickly determine whether SPDs (Surge Protective Devices) are intact, making it an essential tool for the maintenance of communication base stations, power substations, and building lightning protection systems. Based on the latest technical standards from 2025-2026 (such as GB/T 18802.1, YD/T 1235.1, IEC 61643) and market trends, here is a detailed guide: 1. Core Functions and Testing Principles The Lightning Protection Element Tester mainly measures key parameters of components by applying specific DC or pulse voltages/currents: Varistor (MOV) Testing: Varistor voltage (