11kV vs 22kV vs 33kV Transformer: How to Choose
Most industrial and commercial intake substations run at one of three voltages: 11 kV, 22 kV or 33 kV. The transformer itself looks similar in each case;…
Comparisons
Transformer Basics
What Is a Medium Voltage Transformer?
Medium voltage generally covers systems from 1 kV up to 36 kV. In distribution practice the common levels are 11 kV, 22 kV and 33 kV, and a transformer…
Selection & Sizing
How to Choose a Transformer for an Industrial Plant?
Choosing a transformer for an industrial plant is a system decision. The unit has to match the network fault level, the protection philosophy, the plant…
Selection & Sizing
How to Calculate Transformer KVA?
Transformer sizing always ends in kVA. This article gives you the formulas for single phase and three phase systems, worked examples, and a reference…
Selection & Sizing
What Size Transformer Does a Factory Need?
There is no single answer, but there is a reliable method. Factory transformer sizing comes down to five numbers: connected load, diversity factor, power…
Selection & Sizing
How to Select a Distribution Transformer for a Factory?
Selecting a transformer for a factory is an engineering decision with a long tail. Choose too small and production trips under peak load; choose too large…
Transformer Basics
How Does a Distribution Transformer Work?
A distribution transformer has no moving parts and no electronics. It works on one physical principle — electromagnetic induction — discovered by Faraday…
Transformer Basics
What Is a Distribution Transformer?
A distribution transformer is the last transformer in the electricity supply chain. It takes medium voltage from the distribution network — typically…