Diagnostics deep enough to defer a rebuild.
Power factor, sweep frequency response, partial discharge, oil DGA, and field repair, all on the same chain of evidence. We tell you whether to rebuild, replace, or run.
Transformer Services
Power transformer testing and diagnostics
Transformer testing is rarely about whether the unit works today — it almost always does. The question worth answering is whether it will still be working in five years, or whether the moisture, the contamination, the cellulose aging, or the developing winding-deformation has already booked an appointment with failure. ClarkTE answers that with the four diagnostic techniques the industry trusts: dissolved gas analysis (DGA) on the oil, Doble power factor testing on the windings and bushings, sweep frequency response analysis (SFRA) on the geometry, and partial discharge testing on the active part.
Each technique catches a different failure mode. DGA catches incipient internal arcing or thermal faults months before they cascade. Doble catches insulation aging and bushing deterioration. SFRA catches winding deformation from through-faults or transport damage. Partial discharge catches voids and contamination in the dielectric. Run as a set, on a trended schedule, you get a transformer asset-health picture defensible to your insurer and your finance lead.
What we do
Beyond turns ratio and insulation resistance
Most third-party testing stops at TTR and megger. We do not. Our standard transformer scope includes power factor and capacitance, sweep frequency response analysis, leakage reactance, dynamic resistance on tap changers, and dissolved gas analysis with trending. The depth is the whole point.
Online diagnostics
Partial discharge and infrared thermography on energized transformers, so you do not have to schedule an outage to know whether you have a problem. We mobilize, monitor, and report without disturbing production.
Asset health reporting
We synthesize every test method into a single asset health score and a single recommendation: continue service, schedule deeper investigation, plan replacement, or replace immediately. Each recommendation comes with the cost of action and the cost of inaction.
Field repair and oil processing
Bushing replacement, gasket work, oil processing and degassing, and minor field repairs, performed by technicians who have done it on identical equipment hundreds of times.
How our transformer reports differ
Engineers ask us this directly. Here is the honest answer.
- We rank findings by risk. The reader knows in ten seconds whether to be worried.
- We trend across visits. A single test is a snapshot. A trend is a movie. We give you the movie.
- We cite standards inline. IEEE C57 and IEC 60076 references are footnoted, so the report defends itself.
- We include photos and waveforms. Always. Not as a courtesy, as evidence.
Transformer types and services
Request a transformer fleet assessment.
Tell us how many units you have and what shape you think they are in. We will come back with a written scope, a recommended diagnostic depth, and a fixed-fee proposal.
Request Fleet Assessment