How do you choose an SPD manufacturer you can rely on? Six criteria — certifications, datasheet transparency, OEM capability, and sample readiness — that procurement teams use to qualify suppliers.
Thor Electric exhibits at WIN EURASIA 2026, Istanbul, June 10–13. Visit us at booth 2/F141 to see our full AC, DC/PV, and signal SPD range.
A TT earthing system (Terre-Terre) has the source neutral earthed at the transformer, while the consumer installs their own independent
Learn what a TN-S earthing system is, how it differs from TN-C-S and TT, and how to configure your SPD correctly for TN-S installations.
Thor Electric marks its 20th anniversary in 2026 — two decades of surge protection innovation, from first CE certification to smart manufacturing and a full IEC/TUV-certified SPD range across 80+ countries.
Step-by-step SPD wiring diagrams for single-phase, 3-phase, and solar. Covers Type 1, Type 2, DC, and IEC installation requirements.
SPD stands for Surge Protective Device. Learn how it protects electrical systems, the 3 IEC-defined types, and key selection parameters.
Type 1, Type 2, and Type 3 SPDs differ by location and surge waveform. Learn which type your project needs and when a Type 1+2 is the right choice.
