SPD Coordination: How to Design a Cascade That Actually Works
SPD coordination explained from IEC 61643-12: what the 10-meter rule really means, how to match Up across stages, and when Type 1+2 SPD solves it.
Blogs
Temporary Overvoltage and SPD Safety: Why Your SPD Becomes the Victim
A lost neutral can push up to 400 V across your SPD. A temporary overvoltage is what it was never built to stop — how to make yours fail safely.
Lightning Protection Zone (LPZ): Concept and SPD Selection Guide
A lightning protection zone (LPZ) is a defined area within or around a structure where the lightning electromagnetic environment is
SPD vs Circuit Breaker: Differences, Coordination and Installation
SPD and circuit breakers protect against different threats. Learn how they coordinate, which SCPD to choose, and the correct installation order in a panel.
OEM SPD Manufacturer: Custom and Private Label Surge Protection
If you’re sourcing surge protective devices to sell under your own brand, you need an OEM SPD manufacturer who builds
Lightning Arrester vs Surge Arrester: Key Differences
Lightning arrester vs surge arrester: one intercepts direct strikes externally, the other clamps induced overvoltages inside your panels. IEC 62305-4 requires both.
3-Phase Surge Protection Device: Selection and Wiring Guide
How to select and wire a 3-phase surge protection device for TN-S, TT and IT systems. Type 1, 2 and 1+2 options with real parameters per IEC 61643-11.
SPD Maintenance Guide: Inspection, Fault Diagnosis & Replacement
SPD maintenance guide for industrial sites: IEC 62305 inspection schedules, fault indicator diagnosis, dry-contact monitoring, and replacement criteria.
