Thermography Visual Inspection

Non-intrusive identification of thermal stresses

Thermography is a non-intrusive diagnostic method which visualises and quantifies changes in assets’ surface temperatures.

Using infrared technology, it offers a quick and unintrusive way of surveying the health of switchgear and transformers, often indicating potential faults or hotspots within assets without requiring de-energisation. Faults which can be identified include a variety of issues such as corroded connections or imbalance between phase loads.

Thermography is relevant for use with transformers, switchgear, and cable accessories such as terminations, sealing ends & joints; assets which can exhibit temperature anomalies when under stress. To conduct a thermographic inspection, an infrared camera is used. By capturing differences in infrared radiation, this data can be analysed to locate and assess any heat spots.

Test Standards.

Based on ANSI/NETA ATS-2009

Standard for acceptance testing specifications for electrical power equipment and systems

ISO 18434-2:2019

Condition monitoring and diagnostics of machine systems — Thermography — Part 2: Image interpretation and diagnostics

ISO 18434-1:2008

Condition monitoring and diagnostics of machines — Thermography — Part 1: General procedures

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