Author: Shawn Bong

Insulation resistance and polarisation index tests reveal a great deal about a large alternator. Learn what the readings mean and how to interpret the trend.

Partial discharge testing finds insulation trouble in medium voltage switchgear long before failure. Learn the methods, what they detect, and how to use them.

Variable speed drives stress motor insulation in ways direct-on-line running never did. Learn what changes, what fails first, and how to specify for it.

After a through-fault, transformer windings can move without any visible sign. Learn how SFRA testing detects winding displacement and what results mean.

The rating plate on your motor decides how a repair is scoped and priced. Here is what each figure tells a workshop, and why a lost plate costs you time.

A switchgear retrofit keeps the enclosure and replaces what is obsolete inside it. Here is what the work involves on site, and where the technical limits sit.

How often should a transformer be tested? A practical guide to setting oil sampling and electrical test intervals by criticality, loading, and condition.

Should a transformer be repaired on site or moved to a workshop? How fault type, access, outage windows, and site conditions decide where the work belongs.

How is a generator overhaul scope decided, and why does the work follow a set sequence? A practical look at the decisions behind large industrial overhauls.

Machines rarely fail without warning. Long before a motor grinds to a halt or a pump seizes, small signs creep in: a slight rise in temperature, an odd vibration, a…