What Is Electrical Thermography, in Simple Terms?

Electrical thermography is a non-invasive inspection method that uses infrared cameras to “see” heat patterns in electrical systems while they are operating normally.

Every energized electrical component produces heat. That’s normal.
What isn’t normal is excessive heat or uneven temperature patterns — these are often early warning signs of serious problems.

Through thermal scanning of electrical systems, technicians can identify:

• Loose or corroded connections

• Overloaded circuits

• Phase imbalance

• Failing breakers or contacts

• Insulation deterioration

The biggest advantage? Problems are detected early — before failure, fire, or shutdown occurs.

Why Electrical Thermography Is Especially Important in the Philippines

Electrical thermography is useful anywhere, but in the Philippines, it’s even more critical because of our operating conditions.

High Ambient Temperatures

Electrical components already run warm. Add high outdoor temperatures, and systems operate closer to their limits every day.

High Humidity and Moisture

Humidity accelerates corrosion, which increases resistance at electrical connections — and resistance creates heat.

Aging Electrical Systems

Many buildings and factories are operating equipment that was installed years, sometimes decades, ago.

Increasing Power Demand

Modern machinery, automation, and expansion projects place heavier loads on existing systems.

Because of these factors, infrared thermography electrical inspection is one of the most effective ways to keep electrical systems safe and reliable in the Philippine environment.

How Infrared Thermography Electrical Inspection Works

A professional electrical thermography inspection is straightforward, but highly technical behind the scenes.

1. Electrical systems remain energized and under normal load

2. Certified technicians use infrared cameras to scan:

   • Panel boards

   • Switchgear

   • Transformers

   • MCCs

   • Busbars

   • Cable terminations

3. Temperature differences are recorded

4. Abnormal heat patterns (hot spots) are analyzed

5. Findings are classified by severity

Because the inspection is done while systems are operating, it provides real-world, accurate results — without interrupting production or operations.

Which Electrical Systems Should Be Thermally Scanned?

In a proper thermal scanning electrical systems program, the following are commonly inspected:

Panel Boards and Distribution Boards

Loose breakers and busbar connections are one of the most common causes of overheating.

Switchgear and Motor Control Centers (MCCs)

These are critical points where failures can shut down entire production lines.

Transformers

Thermography can reveal overheating bushings, load imbalance, and internal issues.

Cables and Terminations

Hot cable joints and lugs are a leading cause of electrical fires.

Generators and ATS Panels

Ensures reliable operation during power outages.

Common Issues Found During Electrical Thermography Inspections

Based on field experience, thermography inspections frequently uncover:

• Loose or improperly torqued connections

• Overloaded circuits and feeders

• Phase imbalance

• Deteriorated insulation

• Corroded terminals

• Defective breakers or contactors

• Undersized conductors

Each of these issues creates heat — and heat is a warning sign that should never be ignored.