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Introduction: why do DGA gases matter in transformer fault diagnosis? Dissolved Gas Analysis (DGA) is the primary predictive maintenance test for oil‑immersed power transformers. When thermal or electrical stress breaks down mineral oil and cellulose paper insulation, characteristic gases dissolve…
DGA results interpretation is the process of evaluating dissolved gas concentrations in transformer oil to identify abnormal gas generation, analyze gas relationships and trends, and determine the possible type and severity of transformer faults. DGA results should not normally be…
Introduction: how can transformer oil reveal internal faults? A Transformer DGA Monitoring System is an online condition-monitoring system that continuously measures dissolved gases in transformer oil to detect developing insulation and thermal faults. An online DGA monitoring system works by…
Online DGA monitoring vs laboratory DGA testing is not a contest between a better method and a worse one. Treating it as one is the fastest way to buy the wrong instrument. The two answer different questions, and most transformer…
By Leon Zhang, Transformer Condition Monitoring Engineer · Published September 9, 2026 · Last updated: October 5, 2026 · 9 min read DGA monitoring for power transformers is the continuous or periodic measurement of dissolved gases in transformer oil to detect developing internal…
Transformer theft prevention in Africa is a regional problem before it is a technical one, because the same controller, the same sensors and the same alarm logic produce different outcomes in Lagos, Nairobi, Johannesburg and Harare, and the variable that…
Protect pole mounted transformers from theft by matching the sensor set to the removal sequence that a pole installation actually permits, because a theft seven metres above a roadside is a different operation from one inside a pad-mounted enclosure, and…
Rural transformer theft prevention is the design of a protection scheme around the shape of a network rather than around the equipment, because on a rural feeder the patrol interval, the travel time and the load profile are all set…
Transformer remote monitoring communication is the telemetry layer that carries an event from a sensor on the unit to a person who can act on it, and it consists of three separate choices that are usually confused with one another:…
Transformer cable cutting detection is the practice of watching the cables that serve a transformer for the moment one of them is cut, and it exists because cutting comes before lifting in almost every theft of a distribution unit on…
