2.5MVA Transformers, CBN, Minna

2.5MVA Transformers

A distribution transformer or service transformer is a transformer that provides the final voltage transformation in the electric power distribution system, stepping down the voltage used in the distribution lines to the level used by the customer. ... If mounted on a utility pole, they are called pole-mount transformers.
  • Construction date: September, 2020
  • Location: Minna - Nigeria

The Construction of an Electrical Transformer

The three important components of an electrical transformer are a magnetic core, primary winding, and secondary winding. The primary winding is the part that is connected to an electrical source, from where magnetic flux is initially produced. These coils are insulated from each other and the main flux is induced in the primary winding from where it is passed to the magnetic core and linked to the transformer’s secondary winding through a low reluctance path.
How Do Transformers Work?
An electrical transformer uses Faraday’s electromagnetic induction law to work – “Rate of change of flux linkage with respect to time is directly proportional to the induced EMF in a conductor or coil”. A transformer’s physical basis lies in the mutual induction between two circuits that are linked by a common magnetic flux. It is usually equipped with 2 windings: primary and secondary. These windings share a magnetic core that is laminated, and the mutual induction that takes place between these circuits helps transfer electricity from one point to another.
Electrical Transformer – Efficiency and Losses
An electrical transformer does not employ any moving parts to transfer energy which means that there is no friction and hence no windage losses. However, electric transformers do suffer from negligible copper and iron losses. Copper losses occur due to heat loss during the circulation of currents around the copper windings, resulting in loss of electrical power. This is the greatest loss in the operation of an electrical transformer. Iron losses are caused by the lagging of the magnetic molecules that lie within the core. This lagging happens in response to the alternating of the magnetic flux which results in friction and this friction produces heat which leads of loss of power in the core. This loss can be greatly reduced if the core is constructed from special steel alloys.
The frequency of input and output power is the same
All transformers make use of electromagnetic induction laws
No moving parts are required to transfer energy, so there are no friction or windage losses as with other electrical devices.
The primary and secondary coils are devoid of electrical connection (except for auto transformers).