Blogs

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 for industrial sites: IEC 62305 inspection schedules, fault indicator diagnosis, dry-contact monitoring, and replacement criteria.

Overvoltage damages equipment and trips systems. Learn what causes it, how transient and temporary overvoltage differ, and how SPDs protect your installation.

RS485 differential signaling resists noise but not lightning surges. Learn why, where to install RS485 SPDs, and how to select the right device.

DC surge protection devices protect EV chargers, solar, telecom and industrial DC systems. Learn how DC SPDs work, key parameters, and wiring types.

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.

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.