Impulse Voltage Test System

Impulse Voltage Test System: It is extremely difficult to control and adjust the Impulse Voltage Test System wave shapes for different load conditions as in the case of large capacitive…

Continue Reading Impulse Voltage Test System

Low Ohmic Shunt

Low Ohmic Shunt: The most common method employed for high impulse current measurements is a Low Ohmic Shunt shown in Fig. 7.46. The equivalent circuit is shown in Fig. 7.46b.…

Continue Reading Low Ohmic Shunt

Uniform Field Electrode Gaps

Uniform Field Electrode Gaps: Sphere gaps, although widely used for voltage measurements, have only limited range with Uniform Field Electrode Gaps. Hence, it is not possible to ensure that the…

Continue Reading Uniform Field Electrode Gaps

Sparkover Voltage of Sphere Gaps

Factors Influencing the Sparkover Voltage of Sphere Gaps: Various factors that affect the sparkover voltage of a sphere gap are: nearby earthed objects, atmospheric conditions and humidity, irradiation, and polarity…

Continue Reading Sparkover Voltage of Sphere Gaps

Circuits for Producing Impulse Waves

Circuits for Producing Impulse Waves: A double exponential waveform of the type mentioned in Eq. (6.15) may be produced in the laboratory with a combination of a series R-L-C circuit…

Continue Reading Circuits for Producing Impulse Waves

Applications of Cables in Engineering Works

Applications of Cables in Engineering Works: In the recent years natural rubber has been completely replaced by synthetic rubbers and plastics as cable insulation. The physical properties required for wire…

Continue Reading Applications of Cables in Engineering Works

Conduction and Breakdown in Pure Liquids

Conduction and Breakdown in Pure Liquids: When low electric fields less than 1 kV/cm are applied, conductivities of 10-18-10-20 mho/cm are obtained. Conduction and Breakdown in Pure Liquids are probably…

Continue Reading Conduction and Breakdown in Pure Liquids