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Case 04 — A Nordic TSO

Seeing Between The Glass

On glass isolators, the critical corrosion happens where nobody can see it: on the metal caps and pins between the discs. Left unchecked, it eats through the fitting until the string falls from the tower.

No existing equipment could image that gap from the air — so we built the solution ourselves: a high-resolution camera and custom equipment that looks in between the discs of every isolator, capturing the hidden metalwork in sharp detail. A Nordic TSO now knows the true condition of every string in the line.

Glass insulator discs photographed from below, with corroded metal caps and pins visible between them
01

The Challenge

Corrosion between the glass discs is invisible from every normal inspection angle — until the string drops.

02

Our Approach

A high-resolution camera and custom equipment that images the gap between every disc.

03

The Result

Hidden corrosion found and graded across the line — failing strings replaced before they fell.

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