Transformer DGA at CHP: What to Add Beyond Oil Chromatography
Dissolved gas analysis (DGA) is the gold standard for transformer diagnosis but not the only tool. Companion methods at CHP plants: cooling vibration, PD ultrasound, SF₆ and O₂ on adjacent switchgear.
EN version — draft. Ready to publish once kk/en routing (i18n) is implemented across the site.
DGA (dissolved gas analysis) remains the core method for assessing internal transformer condition at CHP plants. It has time lag and blind spots outside the tank — especially cooling failures and switchgear faults.
Companion layers:
- Cooling vibration — 3500/42M / Orbit DCM on oil pumps and fans; weeks ahead of ethylene in DGA.
- PD ultrasound — SDT340 on bushings and terminations (partial discharges).
- Bay switchgear gas — Rapidox SF6 6100, fixed SF₆/O₂, Clean Air monitoring.
Sync DGA sample dates with SF₆ tests in one CMMS. Example: rising C₂H₂ and SO₂ in the line breaker → revise the breaker, not only the oil.
Scope: thermal and hydro power; not oil & gas substations.
Request an audit of your transformer diagnostic programme.
Equipment in this article
KEG TRK quotes prices and delivery times to Kazakhstan on request. We will prepare a commercial offer for your application.
Rapidox SF6 6100 Portable — Portable SF6 Gas Analyser
Lightweight (8.5 kg) SF6 analyser for medium and high voltage GIS and breakers: purity, moisture and decomposition products, up to 8 gases at once.
Rapidox SF6 6100 MK2 Pump Back — SF6 Analyser with Gas Return
Fully automatic zero-emissions SF6 analyser: purity, moisture and decomposition products in 2–8 minutes, then a compressor returns the gas to the equipment at up to 10…
Also in this article: Rapidox SF6 Fixed Detection System — Permanent SF6 Leak Monitoring for Rooms
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