Polarity of Transformer Windings

Hi friends, in this article, I am going to describe about polarity of transformer windings, if you are interested, keep reading.   Unlike DC system, there are no fixed positive and negative poles in AC system, and hence, transformers cannot have fixed positive and negative terminals.   The relative direction Read more…

Instrument Transformer Construction & Working

For measurement of large currents and high voltages in AC circuits, specially constructed accurate ratio transformers are used in conjunction with low range AC instruments. These specially constructed transformers are known as instrument transformers and are of two types: Potential Transformers (PTs) Current Transformers (CTs) These instrument transformers are also Read more…

Working Principle of Autotransformer

The working principle of autotransformer and construction is similar to that of conventional two winding transformers. However, it differs in the way in which the primary and the secondary are inter-related.   In a two-winding transformer, primary and secondary are only magnetically linked by a common core but are completely Read more…

Types of Transformer

There are many types of transformers. These can be classified on the different basis. Following are the main types of transformers.   Types of Transformers on the Basis of Core Arrangement   On the basis of core and winding arrangement, following are the main types of transformers: Core type transformer Read more…