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Generation of High Voltage and Currents

Generation of Impulse Current Generator Output Waveform

Generation of Impulse Current Generator Output Waveform: Lightning discharges involve both high voltage impulses and high current impulses on transmission lines. Protective gear like surge diverters have to discharge the lightning currents without damage. Therefore, Generation of Impulse Current Generator Output Waveform of high magnitude ( ≈ 100 kA peak) find application in test work …

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Generation of Switching Surges

Generation of Switching Surges: Nowadays in extra high voltage transmission lines and power systems, switching surges is an important factor that affects the design of insulation. All transmission lines rated for 220 kV and above incorporate switching surge spark overvoltage for their insulation levels. A switching surges is a short duration transient voltage produced in …

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Series Inductance in Impulse Generator Circuit

Series Inductance in Impulse Generator Circuit: Often Series Inductance in Impulse Generator Circuit are required to test equipment with large inductance, such as power transformers and reactors. Usually, generating the impulse voltage wave of proper time-to-front and obtaining a good voltage efficiency are easy, but obtaining the required time-to-tail as per the standards will be …

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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 under over damped conditions or by the combination of two R-C circuits. Different equivalent circuits that produce impulse waves are given in Figs 6.15a to …

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Generation of High Frequency AC High Voltage

Generation of High Frequency AC High Voltage: High Frequency AC High Voltage are required for rectifier d.c power supplies. Also, for testing electrical apparatus for switching surges, High Frequency AC High Voltage damped oscillations are needed which need high voltage high frequency transformers. The advantages of these high frequency transformers are: the absence of iron …

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Resonant Transformers

Resonant Transformers: The equivalent circuit of a high voltage testing Resonant Transformers consists of the leakage reactance of the windings, the winding resistances, the magnetizing reactance, and the shunt capacitance across the output terminal due to the bushing of the high voltage terminal and also that of the test object. This is shown in Fig. …

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