SPD Protection Device Ratings for Main Switchboards

SPD Protection Device Ratings for UK Main Switchboards: A Practical Guide Based on extensive research of UK standards, manufacturer specifications, and industry practices, here are practical “rule of thumb” protection device ratings for Type 1 and Type 2 surge protection devices (SPDs) in main switchboards. Executive Summary For Type 1 SPDs (installed at the origin/main distribution board), typical thermal-magnetic MCCB protection […]