Transformers, types of transformer, transformer parts, instrument transformer, transformer cooling, installation, polarity, insulation classes of transformer, Current Transformers (CTs) & potential transformer (PTs) discuss in details in this category.
Introduction A transformer is not a new word for you. You have been told countless times that the transformer close to your hood is the one that pumps electric power, isn’t it? Well, that’s from a layman, today we will be looking at this single device which is very important in the electrical world and …
A transformer is electrical equipment or device that converts voltage from one voltage level to another while ideally retaining input and output power the same. There are various types of transformers depending on the basis of classification. One way of classification is on the magnitude of voltage it handles, in this case, we have low …
Step-up transformer is an electric device that raises the voltage of the secondary side (winding) to the primary side (winding). A transformer is a static device that is used to step up voltage and step down the voltage. Power remains the same on the primary side and the secondary side of the transformer. As we …
Transformer Cooling Methods A transformer in operation develops heat as a result of the copper and core losses during operation. Heat is not produced rapidly in small transformers, but the rate is much higher in large transformers. The rate of heat production determines how high the operating temperature rises above the ambient temperature. There are many …
Autotransformer Introduction The prefix auto means self. An autotransformer is a self-induced transformer. It has the primary and secondary windings electrically connected. When the transformer is used as a step-down transformer, the entire winding serves as the primary winding. The section XY is common to both the primary and secondary windings. As with the two-winding …
Instrument Transformers Current transformer and voltage transformer measuring instrument transformers are designed to operate at low current and low voltage. Safety is also a reason for not connecting test instruments to sources operating at high voltage. An instrument transformer reduces high voltages and currents to safe values. Instrument transformers perform two functions. It serves as …
Basic Transformer Construction A transformer consists of two coils mounted in fixed positions relative to each other. One coil is supplied by an alternating current. As the current alternates, the magnetic field it produces also alternates. This alternating field induces an alternating current in the second coil, which supplies a load. A simple transformer construction consists …
Transformers have high efficiencies, especially the larger sizes operating at 50 to 100% of full load. However, they are not perfect. Some losses occur in all transformers. Transformer losses are divided into two types Copper losses Core losses Copper loss Copper loss is the loss of power caused by the resistance of the copper windings. …