Transformer Articles – AdepaTrade Insights

Illustration of a three-phase oil-immersed distribution transformer with three HV bushings and four LV bushings on its cover

Transformer Vector Groups Explained: Dyn11, Yyn0, YNd11 and How to Choose

How to read transformer vector groups such as Dyn11, Dyn5, Yyn0 and YNd11, why Dyn11 is common, parallel operation rules, and IEC vs ANSI phase displacement.

Illustration of an oil-immersed distribution transformer with a corrugated tank beside a cast-resin dry-type transformer

Oil-Immersed vs Cast-Resin Transformers: Fire, Environment, Losses and Selection

Oil-immersed vs cast-resin dry-type transformers compared: fire behaviour, liquids, climatic and environmental classes, losses, noise, loading and selection.

Illustration of a distribution transformer beside a larger power transformer on a stepped plinth

Distribution vs Power Transformers up to 31.5 MVA / 36 kV: Ratings, Construction and Uses

What separates distribution from power transformers up to 31.5 MVA / 36 kV: function, ratings, construction, uses and what to specify.

Illustration of three ground-mounted hermetic distribution transformers of increasing size on one concrete plinth, the middle unit outlined in red

Sizing a Distribution Transformer: A Practical Checklist

A step-by-step approach from maximum demand to a standard kVA rating, including a worked example and the effect of impedance on fault level.

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