GENERATION OF HIGH VOLTAGE AND CURRENTS

Generation of Impulse Currents Waves

Generation of Impulse Currents Waves: 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 currents waveforms of high magnitude ( ≈ 100 kA peak) find application in test work as well as in […]

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 […]

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 […]

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 […]

Electrostatic Generators

Electrostatic Generators: Van de Graaff generators are essentially high voltage but low power devices, and their power rating seldom exceeds few tens of kilowatts. As such Electrostatic Generators machine which effectively convert mechanical energy into electrical energy using variable capacitor principle were developed. These are essentially duals of electromagnetic machines and are constant voltage variable […]

Deltatron Circuit

Deltatron Circuit or Cascaded Modular Voltage Multipliers: A combination of Cockcroft-Walton type voltage multiplier with cascaded transformer d.c. rectifier is developed recently for very high voltages but limited output currents having higltstability, small ripple factor and fast regulation. One such unit is recently patented by “ENGE” in U.S.A., called “ENGETRON” or `DELTATRON”. The schematic diagram of […]

Voltage Multiplier Circuits

Voltage Multiplier Circuits: Cascaded Voltage Multiplier Circuits for higher voltages are cumbersome and require too many supply and isolating transformers. It is possible to generate very high d.c. voltages from single supply transformers by extending the simple voltage doubler circuits. This is simple and compact when the load current requirement is less than one milliampere, […]

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