What Is SPD in Electrical Systems? Meaning, Types and How It Works
2026-05-06
SPD stands for Surge Protective Device. Learn how it protects electrical systems, the 3 IEC-defined types, and key selection parameters.
Blogs
Type 1 vs Type 2 vs Type 3 SPD: What’s the Difference?
2026-04-29
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.
Gas Discharge Tube (GDT): How It Works in SPD Systems
2026-04-24
Learn what a gas discharge tube is, how it works, and how GDTs are used in SPDs. Covers 2-electrode vs 3-electrode types and GDT vs MOV comparison.
TN-C-S Earthing System Explained: Wiring, Advantages and SPD Configuration
2026-04-21
Learn what the TN-C-S earthing system is, how it differs from TN-S and TT, and how to configure your SPD correctly for PME installations.
Surge Protection Device for Solar Panels: A Practical Selection Guide
2026-04-16
Learn how to select the right surge protection device for solar panel systems — AC/DC placement, Type 1 vs Type 2, key IEC parameters explained.
Ethernet Surge Protection for Outdoor RJ45 Networks: Why IP68 Matters?
2026-04-10
Protect your outdoor Ethernet from lightning strikes. Discover why an IP68-rated RJ45 Surge Protection Device is essential for Gigabit and PoE networks.
2026 London Elexshow: A Record-Breaking Success for Thor Surge Protection
2026-04-04
THor celebrates a monumental success at the 2026 London Elexshow. Discover our AC and solar SPDs that secured £150k in orders and 155 project leads at Alexandra Palace.
Metal Oxide Varistor (MOV): The Core Component of a Surge Protection Device
2026-03-31
Explore how metal oxide varistors (MOVs) serve as the core of surge protection devices (SPDs), their working principles, applications in power and telecom, and why using certified MOVs is critical for long-term safety and reliability.