Service
Diagnostics & electrical testing
Diagnostic electrical testing of transformers and substations with Omicron and Megger instrumentation and a documented protocol.
Decisions about your assets, backed by data. We measure the real condition of transformers and substations with precision instrumentation and translate the numbers into a maintenance decision, not just a report.
Diagnosis is the foundation of every sound maintenance decision. Without real electrical data, any intervention is guesswork. We measure the condition of the insulation, windings, core and accessories, and compare against standards and asset history.
Our protocol combines tests that each isolate a different failure mode: insulation resistance and turns ratio as a base, power factor/Tan Delta for dielectric condition, DGA for in-service monitoring, and SFRA when mechanical damage is suspected.
The value is in interpretation: reading the results together and against the equipment's own history is what turns a set of measurements into a diagnosis and a clear recommendation.
What we diagnose
Transformer test protocol
TTR, power factor, insulation resistance, winding resistance, DGA and SFRA.
When it applies: Periodic diagnosis or acceptance after repair.
Substation testing
Breakers, instrument transformers, contact resistance and protection.
When it applies: Substation maintenance and commissioning.
How we execute the service
Planning
Outage coordination and test plan by asset criticality.
Testing
Execution with Omicron and Megger instrumentation, temperature-corrected.
Interpretation
Results read together and against history and standards.
Protocol
Documented report with verdict and recommendations.
Documented international experience
Dry-type transformer diagnostics in Jamaica
See TEVKO’s fieldwork: visual inspection, insulation resistance and insulation power factor testing. Three photographs document the on-site assignment. Measurement values and an acceptance decision are not published in this case.
Frequently asked questions — diagnostics & electrical testing
What tests are essential for a power transformer?
As a base: insulation resistance, turns ratio (TTR), power factor/Tan Delta and dissolved gas analysis (DGA), complemented by SFRA when mechanical damage is suspected and thermography in service.
Which tests require an outage?
TTR, power factor, insulation resistance and SFRA require the equipment de-energized. DGA (oil sampling) and thermography are done in service.
Why compare against history?
Most of these tests are more useful as a trend than as an isolated value; comparing against previous measurements reveals degradation a single reading does not show.
What do I receive at the end?
A protocol with measured values, condition verdict, findings and recommendations for the next cycle — technical evidence to support operation and budget decisions.
Diagnostics & electrical testing in images
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