Category Archives: Transformers

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What are Necessary Fittings & Parts for Medium Voltage MV Transformers?

Transformers Fittings In order to install a medium voltage transformer below is the list of necessary fittings: Plain bi-directional rollers with blocking facilities. Skid base, lifting and jacking lugs Neutral and earthing terminals Rating and terminal marking plates Transformer Thermal Protection Temperature protection shall be incorporated to prevent thermal overloading of the power transformers. BMS… Read More »

All About Magnetism Magnetic Field and Magnetic Force

What is Magnetism? Magnetism is the study of magnetic fields and their effect on materials. The effect is due to unbalanced spin of electrons in atom. It is readily observed every day from the simple magnet that attracts nails and other metals to cassette tapes to magnet-driven trains. In terms of applications, magnetism is one of… Read More »

Electromagnetic Induction | Faraday Law & Lenz’s Law Explained

To best understand the Electromagnetic Induction lets first have a look on two important laws relating to the subject of this article. Lenz’s law is named after a Russian physicist of Baltic German descent Heinrich Lenz in 1834, and it states that, if an induced current flows, its direction is always such that it will… Read More »

Balun Transformer – Balanced vs Unbalanced Transmission Lines

What is a balun? A Balun is special type of transformer that performs two functions i.e. impedance transformation and balanced to unbalanced transformation. The term balun is a contraction of “balanced to unbalanced transformer” Why do we need a balun? Baluns are important because many types of antennas (dipoles, yagis, loops) are balanced loads, which… Read More »

How to Measures Core and Winding Losses of Electrical Current Transformer

core loss open circuit test using DPATT-3Bi instrument

Both short circuit and open circuit tests are conducted to measure the core and winding losses of transformers. As we know that there are mainly two major parts of transformers i.e. core and winding, which are made of two type of materials, which are iron and copper. The core of a transformer is made of… Read More »

What is On Load Tap Changer OLTC in Transformers

A tap changer is a device fitted to power transformers for regulation of the output voltage to required levels. On-load tap-changers (OLTCs) are indispensable in regulating power transformers used in electrical energy networks and industrial applications. OLTC changer alters the turn ratios of the transformer on the system by altering the number of turns in… Read More »