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Transformer guides
The questions that come up on every job, answered properly. Written for the person specifying or buying the equipment.
Step Up and Step Down Transformers
What separates a step up from a step down transformer, whether one can be reversed, and the voltage combinations people actually ask for.
Distribution Transformers
What a distribution transformer is, how it differs from a power transformer, the ratings it comes in and what one costs to buy today.
Three Phase Transformers
How three phase transformers work, how they differ from single phase, and the voltage and amperage questions that come up on every job.
Substation Transformers and Switchgear
What sits inside an electrical substation, how a substation transformer differs from a pad mounted unit, and where unit substations and switchgear fit.
Dry Type and Liquid Filled Transformers
The real trade off between dry type and liquid filled transformers, including cost, efficiency, life expectancy, indoor use and the fire code question.
Three Phase Transformer Wiring and Connections
Delta and wye connections explained, what L1, L2 and L3 mean, which connection is used where, and how to tell what a transformer is from its nameplate.