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How can you solve resistance to complicated circuits like diamond shaped circuits?
One way is to use Thevenin's theory and methods. Léon Charles Thévenin was a French telegraph engineer who extended Ohm's Law to the analysis of complex electrical circuits.
What are the advantages and disadvantages of oil compared to air when considering methods of arc control in circuit breakers?
Air has less quenching effects when a breaker breaks on load or on a fault. Air circuit breakers are not suggested for very high rating current and high voltage application. It is ok for Low voltage application. Oil is cumbersome to use and maintain. But Hv or EHV application oil is used for breaker quenching application. These days SF6 or vacuum circuit breakers are more popular for HV, EHV application.
How are parallel circuits and series circuits alike?
in parallel the voltage stays the same in parallell the current is shared in series the voltage is shared in series the current stays the same the main similarity between parallel and series circuits is when voltage increases, current increases.
Where do you use sequence starting methods for electrical motors?
it is used in conveyors belts.
How arc take place in circuit breaker?
All circuit breakers try to achieve the same thing: ensure that the rate of increase of dielectric strength exceeds the rate of increase of potential gradient across the gap between the separating contacts.Explained in another way, the rate at which energy is developed by the arc must be exceeded by the rate at which energy is dissipated through heat transfer.This can be achieved in numerous ways:reduction in arc temperature -which reduces vapourization of contact metals and ionisation of insulating medium.reduction in potential gradient -increasing contact separation distance.constriction of the arc -by insulating medium pressure, which reduces cross-sectional area of arc, and increases its resistance.increasing medium dielectric strength -by replacing contaminated insulation medium.speed of operation -minimising energy build up (I2Rt).utilising 'current zero' -utilising the natural cut-off point for a.c. current.All practical circuit breakers utilise a combination of the above methods.
