Testing of Materials Articles

Testing of Materials Articles: Dielectric Constant and Loss : Many insulating substances have dielectric constant greater than unity and have Dielectric Constant and Loss when subjected to a.c. voltages. These…

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High Voltage Engineering Articles

High Voltage Engineering Articles: This High Voltage Engineering Articles which includes the following topics: Electric Field Stress Breakdown in Liquid Dielectrics Solid Dielectric Materials and Composites Materials Electric Stress Control…

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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…

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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…

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Intrinsic Breakdown

Intrinsic Breakdown: When voltages are applied only for short durations of the order of 10-8 s the dielectric strength of a solid dielectric increases very rapidly to an upper limit…

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Conduction and Breakdown in Commercial Liquids

Conduction and Breakdown in Commercial Liquids: As already mentioned, Conduction and Breakdown in Commercial Liquids are not chemically pure and have impurities like gas bubbles, suspended particles, etc. These impurities…

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Precision Frequency Standard

Precision Frequency Standard: Most high precision frequency standard in use utilise a geometric transverse (GT) cut quartz crystal as the frequency controlling resonant elements having changes in frequency of less…

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