Eastern High Voltage Inc.

Infrared Scanning

Infrared scanning should be the first step in a proper preventive electrical maintenance program.  As electrical power systems are loaded, they naturally produce heat emissions.  Infrared scanning can detect abnormal patterns in these heat emissions by using a thermal imaging system.  These abnormal thermal patterns are known as ‘hot-spots’ and are caused by issues such as loose connections, high resistance, and load imbalances.  A yearly infrared inspection, during periods of substantial system loading, is one of the most cost-effective ways to identify these problems. At Eastern High Voltage, we use Flir Systems infrared cameras to achieve high quality thermal imaging and detection results.  Our thermographers are NETA certified and have experience performing electrical systems testing and maintenance.

How It Works - Our trained technicians remove electrical equipment covers and a thermographic inspection is then performed on the current carrying parts of the equipment.  When an abnormal thermal pattern is detected, the problem is documented with thermal and visible light pictures, temperatures, load readings, and equipment information.  Upon completion of work, a detailed report of these problems is prepared, including recommended corrective measures and a list of equipment scanned.

  • Cost-Effective
  • Performed With Power System Loaded
  • Discovers ‘Hot-Spots” Prior to Catastrophic Failure
  • Can Reach Hard to Access Areas
  • Targets Problem Areas Enabling More Efficient Use of Personnel During Planned Maintenance Outages

Transfer Oil Analysis


Fluid filled transformers, tap changers, and circuit breakers contain high quality oil that serves as an insulator and coolant.  Yearly oil testing will not only verify that it is in good condition, but can also detect internal problems and impending failures.  Oil samples can usually be procured without a power shutdown, thus providing a valuable and cost-effective maintenance tool.
  • Five Part Test - Dielectric Breakdown Voltage, Water Content, Acidity, Interfacial Tension, Power Factor
  • DGA - Dissolved Combustible Gases in Oil
  • TCA - Transformer Condition Assessment
  • TASA - Tap Changer Activity Signature Analysis
  • BOA - Breaker Oil Analysis