Industry news

A practical guide to how metal oxide (ZnO) surge arresters protect high-voltage substations—covering the clamping mechanism, insulation coordination, arrester types, and key selection ratings. SUNJ explains what substation engineers need to specify.

A practical buyer's guide to selecting drop-out fuse cutouts for distribution transformer protection—covering voltage class, fuse-link sizing, interrupting rating, porcelain vs. polymer, and coordination. SUNJ explains what utility buyers need to specify.

Explore the engineering shift from porcelain to polymer insulators in high-voltage transmission. SUNJ breaks down material science, performance, lifecycle cost, and real-world application advice for utility buyers and grid engineers.

Understanding the differences between lug materials is essential for preventing connection failures. This guide covers the engineering criteria for selecting Copper, Aluminum, and Bimetal Lugs for your power systems.