Instrument Transformers Applications & Types

Instrument Transformers Application

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 …

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Transformer Construction and Types of Cores

Transformer Construction

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 …

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Transformer Losses and Efficiency

Efficiency of Transformer & Losses

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. …

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Dry Cells Characteristics & Sizes

dry cell sizes & properties

Dry Cell The potential difference between the terminals of a dry cell is about 1.5 volts (abbreviated V), regardless of the size of the cell. The potential difference depends only on the chemicals used in making the cell. The size affects only the length of time required for discharge. Dry Cell Size The larger the …

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Electric Current Definition | Unit of Current |

positive current

Electric Current Many materials have free electrons. These electrons are not bound tightly to the atoms. They are free to move from one atom to another. When large numbers of these electrons move in one direction, the result is called an electric current. Electric Current in Metals In a metals-for example, copper-the free electrons can …

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Basic Electrical Terms and Definitions

Electrical Terms

Electrical Terms Understanding electrical terms is compulsory for engineers. As you study electricity in your engineering program, and as you work with electricity in power plants, and industrial plants, you will hear, read, and use various electrical terms. These terms have very exact meanings. You must know what each one means if you are to …

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Static Electricity

static charge

Definition of Static Electricity Static electricity is electricity that does not move. The word “static” comes from the Greek word “statikos”, meaning the act of making something stand still. Static electricity consists of electrical charges that remain unmoving on an object. Static electricity is usually generated by the physical contact and separation of different kinds …

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