An infrared thermographic scan (also known as an infrared inspection or thermal imaging survey) for electrical systems is a preventive maintenance tool used to detect abnormal heat patterns or “hot spots” in electrical equipment. These hot spots often indicate underlying issues such as loose connections, overloaded circuits, imbalanced loads, deteriorated insulation, or failing components — all of which can lead to equipment failure or fire if not addressed.
Purpose of Infrared Thermographic Scans in Electrical Systems
- Identify overheating components before failure
- Prevent unplanned downtime by enabling proactive maintenance
- Improve safety by reducing fire risk
- Reduce energy loss due to inefficiencies
- Comply with regulations (often required by insurance companies or safety standards)
How It Works
An infrared (IR) camera is used to detect infrared radiation (heat) emitted by components. It creates a thermal image or thermogram that visually shows temperature differences. The technician can then interpret this image to locate anomalies.
Common Electrical Components Scanned
- Switchgears and switchboards
- Circuit breakers
- Fuses and fuse holders
- Busbars and bus ducts
- Transformers
- Electrical panels
- Motors and motor control centers (MCCs)
- Disconnects and contactors
-
Wiring and cable connections
Common Issues Detected
| Issue | IR Signature |
|---|---|
| Loose or corroded connections | Localized hot spots |
| Overloaded circuits | Broad areas of elevated temperature |
| Phase imbalances | Uneven heating between phases |
| Faulty Components | Unusual temperature spikes |
Best Practices for Infrared Electrical Inspections
- Perform under load: Systems must be operating (usually >40% of typical load) to reveal thermal anomalies.
- Schedule regularly: Typically done annually, or more often in critical systems.
- Use trained thermographers: Certification (like Level I/II from ITC or similar) ensures proper interpretation.
- Document findings: Include thermographic images, temperature readings, and recommended actions.
- Take baseline scans: Helps track changes over time.
Contact Infra-Red now if your company needs infrared thermographic scans.