Table of Contents
- 1 On what factors does the breakdown voltage depend on?
- 2 What are the factors responsible for breakdown of dielectric material?
- 3 What is breakdown in High voltage?
- 4 What is breakdown voltage in Mosfet?
- 5 What is breakdown voltage in p/n junction diode in reverse bias?
- 6 What is the relationship between voltage and voltage induction?
On what factors does the breakdown voltage depend on?
Velocity, impurities, electrodes’ shape and the type of applied voltage are among the factors documented to have a significant effect on breakdown strength.
What are the factors responsible for breakdown of dielectric material?
Various factors, such as the shape of electrodes, their area, the applied electric field, gap spacing, the structure and type of polymeric materials, their molecular weight, types of additives, water and gas content, type of voltage waveform used, pressure of the impregnant (if any), have an effect on the breakdown …
Why does insulation depend on voltage?
The main important reason of why insulation depends upon voltage is the breakdown of insulation. The dielectric strength of an insulator depends upon the applied voltage across. If we apply a high voltage above its capacity then the dielectric strength will be weak and the insulator goes into the breakdown.
What are the factors influencing breakdown in gases?
Breakdown voltages of air gap decrease with increasing altitude, because density and pressure of air decrease with increasing of altitude. U – breakdown voltage in actual atmospheric condition. – breakdown voltage in standard atmospheric condition.
What is breakdown in High voltage?
Electrical breakdown or dielectric breakdown is a process that occurs when an electrical insulating material, subjected to a high enough voltage, suddenly becomes an electrical conductor and electric current flows through it.
What is breakdown voltage in Mosfet?
Breakdown voltage, BVDSS, is the voltage at which the reverse-biased body-drift diode breaks down and significant current starts to flow between the source and drain by the avalanche multiplication process, while the gate and source are shorted together.
What is insulation voltage in cables?
It is the property of a cable by virtue of it can withstand the applied voltage without rupturing it is known as insulation level of the cable. …
Which is the factor on which life of insulation depends on?
One important factor which mainly influence lifetime of electrical equipment and thus electrical insulation systems are temperature. But the resulting lifetime is involved by humidity, overvoltage, vibration, radiation and other factors.
What is breakdown voltage in p/n junction diode in reverse bias?
If reverse bias is made too high, the current through PN junction increases abruptly and the voltage at which this phenomenon occurs is called breakdown voltage . At this breakdown voltage , the crystal structure breaks down. This causes a large current to flow. This mechanism of breakdown is called zener breakdown .
The main important reason of why insulation depends upon voltage is the breakdown of insulation. Insulation materials are made of dielectric materials. If an insulator has more thickness, then the dielectric strength also be more. The dielectric strength of an insulator depends upon the applied voltage across.
What is the relationship between voltage and voltage induction?
When any conductor carrying voltage and current, voltage induction occurs in that conductor. As a result, electrostatic pressure occurs across the insulation of that conductor. This electrostatic pressure depends upon the voltage if the carrying voltage is more then the electrostatic pressure will be more.
Why are high voltage cables more dangerous?
If a cable carrying a very high ampere current and very low voltage, that is not so much dangerous but if a cable carrying low current and high voltage, it is very dangerous. So any conductor or cable carrying high voltage should have more insulation arrangement.
How important is the thickness of the insulation in electrical cables?
So, the thickness of the insulation is very important when the conductor carrying a high voltage. Mainly, in case if electrical cables, much more insulation is provided compared to its carrying voltage. Suppose a cable is manufactured for 230V, but insulation is provided to that cable above 600V.