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SF6 Circuit Breaker

SF6 circuit breaker: One of the recent developments in the field of high voltage switchgear is the SF6 circuit breaker. In this a gas called sulphur hexafluoride is used as…

Vacuum Circuit Breaker

Vacuum Circuit Breaker: Although the advantages of interrupting the arc in a vacuum were recognized as early as the nineteenth century, this did not find wide application till a few…

Air Blast Circuit Breaker

Air Blast Circuit Breaker: Air Blast Circuit Breaker - It is not possible to produce a low resistance arc without a considerable gas pressure so that the only type available…

Arc Properties

Arc Properties: The manner in which the are medium is made to conduct has already been studied. A plot of instantaneous values of voltage eB between the electrodes of a burning…

Arc in Circuit Breaker

Arc in Circuit Breaker: Discharge in a.c. circuit breakers, generally in the form of an arc, occurs in two ways. When the contacts are being separated arcing is possible even…

LED Seven Segment Display

LED Seven Segment Display: The arrangement of a LED Seven Segment Display is shown in Fig. 20-6(a). The actual LED devices are very small, so, to enlarge the lighted surface,…

Crystal Equivalent Circuit: Crystal Equivalent Circuit - The output frequency of oscillator circuits is normally not as stable as required for a great many applications. The component values all have…

Instrumentation Amplifier Circuit Working

Instrumentation Amplifier Circuit Working: Circuit Operation - At first glance, the Instrumentation Amplifier Circuit Working in Fig. 14-28 looks complex, but when considered section by section it is found to…