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Types of transformer
Not everything called a transformer does the same job. These are the ones that come up alongside distribution work, what each is for, and where it differs from the pad mounted units we supply.
Current Transformers
What a current transformer does, how ratios work, why the secondary must never be left open, and where they sit in a distribution system.
Potential and Voltage Transformers
What a potential transformer is, how it differs from a current transformer and from a distribution transformer, and why it is fused on both sides.
Isolation Transformers
What an isolation transformer is for when the voltage does not change, why a 480 to 480 unit exists, and where isolation genuinely matters.
Buck Boost Transformers
When a buck boost transformer beats a full isolation transformer, how the autotransformer connection makes it small and cheap, and what it gives up.
Control Transformers
What a control transformer does, why 480 to 120 volts is the standard, and why inrush rather than steady load decides the size.
Autotransformers
How an autotransformer differs from a two winding transformer, why it is smaller for the same rating, and the safety limit that decides when you cannot use one.
Toroidal Transformers
Why a doughnut shaped core is quieter and leaks less field, and why you will not find one in a pad mounted transformer.
Pole Mounted Transformers
How a pole mounted transformer differs from a pad mounted one, what sizes they come in, and why a utility chooses one over the other.
Transformer Oil and Insulating Fluids
Mineral oil against FR3 and other ester fluids, what oil testing tells you, and why PCBs still come up on older units.
We supply three phase and single phase pad mounted distribution transformers. Most of the types above we do not sell, they are here because the question comes up constantly and the answers are hard to find written plainly.