Electrical Thermal Imaging Surveys

Electrical Thermographic Testing

How Thermographic Testing Works

Electrical thermographic testing is the technical process behind capturing accurate temperature measurements and interpreting thermal behaviour within electrical systems. Unlike visual inspections or conventional electrical testing, thermographic testing evaluates equipment under live load conditions, allowing faults to be identified through their thermal signatures rather than through physical contact or circuit isolation.

Infrared Measurement Principles

During testing, calibrated infrared cameras measure emitted infrared radiation from conductors, terminations, protective devices and distribution equipment. These measurements are influenced by factors such as emissivity, reflectivity, load current and environmental conditions, all of which must be correctly accounted for to ensure reliable results. Certified thermographers adjust camera settings, compensate for surface characteristics and verify load levels to ensure that every temperature reading is both meaningful and traceable.

Faults Identified Through Thermographic Testing

Thermographic testing is particularly effective at identifying loose electrical connections, high-resistance connections, phase imbalance, overloaded circuits, failing circuit breakers, deteriorating switchgear and other developing electrical faults that may not be detectable through EICRs or routine electrical checks. By analysing temperature differentials and comparing them against expected operating conditions, our thermographers can determine whether an anomaly represents a developing fault, load-related behaviour or a benign thermal pattern.

ISO-Aligned Testing Methodology

All testing is carried out in accordance with ISO 18434-1, ensuring consistent methodology, accurate temperature interpretation and repeatable diagnostic results. This structured approach provides a robust foundation for fault classification, risk assessment and maintenance planning across all electrical environments.

Electrical Thermal Scans

What Electrical Thermal Scans Reveal

Electrical thermal scans provide a visual representation of how electrical components are performing under load by highlighting abnormal heat patterns. These scans make developing faults immediately visible, allowing issues to be identified long before they cause failures, downtime or fire hazards. By capturing real-time thermal behaviour, scans offer a level of diagnostic clarity that cannot be achieved through visual inspection or conventional electrical testing alone.

Typical Anomalies Identified Through Thermal Scanning

Thermal scans are highly effective at detecting a wide range of electrical faults, including:

• High-resistance connections caused by loose terminations or deteriorated conductors.
• Overloaded circuits producing excessive heat under normal operating conditions.
• Phase imbalance within three-phase systems.
• Failing circuit breakers and switch fuse or isolator defects.
• Component degradation within switchgear, MCC and control equipment, UPS systems and distribution boards.

These anomalies often develop silently and may not be detectable through EICRs or routine electrical checks, making thermal scans an essential part of predictive maintenance.

Interpreting Thermal Images Accurately

Thermal scan images form the foundation of your survey report, providing clear visual evidence of identified issues. Each image is accompanied by temperature data, fault classification, severity ratings and recommended corrective actions. This structured reporting approach supports compliance with ISO 18434-1, insurer requirements and best-practice maintenance standards.

Realising the Benefits of Electrical Thermal Imaging

Why Provider Quality Determines Survey Value

Realising the full benefits of electrical thermal imaging surveys depends entirely on the service provider you choose. Not all surveys are equal, and the quality can vary widely. Choosing a provider without robust systems and standards risks survey reports of limited value, potentially missing defects or misdiagnosing issues. Deciding solely on cost often compromises reliability and effectiveness, completely undermining the purpose of the survey.

Setting the Benchmark for Excellence and Reliability

At Red Current, our mission is to deliver industry‑leading electrical thermal imaging surveys across all sectors, setting the benchmark for excellence, accuracy, and reliability. We are committed to helping businesses enhance safety, reduce risk, and improve operational efficiency through expert diagnostics and uncompromising service standards.

Continuous Innovation and Professional Development

Our processes are built around continuous innovation, ensuring our systems and standards evolve to meet the highest expectations. We also prioritise the professional development of our thermal imaging surveyors, ensuring our expertise remains second to none.

Ensuring the Full Potential of Thermography Is Realised

Our surveys guarantee that the full potential of electrical thermal imaging is realised, significantly reducing the risk of property damage and business interruption, all while ensuring zero disruption to our clients' operations.

Qualified Thermographers & Quality Assured Reporting