Uninterruptible Power Supply

Uninterruptible power supply (UPS) An uninterruptible power supply (UPS) is a device that allows a computer to keep running for at least a short time when the primary power source is lost. It also provides protection from power surges. A UPS contains a battery that "kicks in" when the device senses a loss of power from the primary source. If you are using the computer when the UPS notifies you of the power loss, you have time to save any data...

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INDUSTRIAL UPS AND DC POWER SYSTEM

INDUSTRIAL UPS AND DC POWER SYSTEM I. Basic of AC/DC UPS Solution ...

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General principles of measuring current and voltage

General principles of measuring Current and voltage Contents: 1. General principles of measuring current and voltage 1.1 Instrument transformers 1.2 Current transformers operating principles 1.2.1 Measuring errors 1.2.2 Calculation of errors 1.2.3 Variation of errors with current 1.2.4 Saturation factor 1.2.5 Core dimensions 1.3 Voltage transformers operating principles 1.3.1 Measuring errors 1.3.2 Determination of errors 1.3.3 Calculation...

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Basic Princicple of Battery

Basic Princicple of Battery The basis for a battery operation is the exchange of electrons between two chemical reactions, an oxidation reaction and a reduction reaction. The key aspect of a battery which differentiates it from other oxidation/reduction reactions (such as rusting processes, etc) is that the oxidation and reduction reaction are physically separated. When the reactions are physically separated, a load can be inserted between the...

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Basic Concepts of Battery

Basic Concepts of Battery Contents: Components of Cells and Batteries Classification of Cells and Batteries Operation of a Cell Theoretical Cell Voltage, Capacity, and Energy Specific Energy and Energy Density of Practical Batteries Upper Limits of Specific Energy and Energy Density ABOUT THE EDITORS David Linden has been active in battery research, development, and engineering for more than 50 years. He was Director of the Power Sources...

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BATTERIES MAINTENANCE

INDUSTRIAL BATTERIES/ACCU MAINTENANCE (LEAD-ACID, NICKEL-CADMIUM, NICKEL-IRON)     The installation and proper maintenance of three types of storage (secondary) batteries used in industrial applications are discussed: lead-acid, nickel-cadmium, and nickel-iron. Although a detailed discussion on the various considerations that enter into selecting the correct battery type for particular applications will not be presented,...

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