Fundamentals of Power System Protection 
The motive of an Electric Power System is to generate and supply electric powered powered powered powered powered powered powered power to consumers. The power tool ought to be designed and managed to deliver this power to the utilization elements with every reliability and economically The capital investment involved in power tool for the generation, transmission and distribution is so fantastic that the proper precautions need to be taken to ensure that the tool now not quality operates as nearly as possible to top efficiency, but moreover need to be blanketed from accidents The everyday route of the electric contemporary-day is from the power deliver thru copper (or aluminium) conductors in generators, transformers and transmission traces to the burden and it`s miles confined to this route thru manner of method of insulation. The insulation, but, can also furthermore moreover moreover damage down, each thru manner of method of the effect of temperature and age or thru manner of method of a physical accident, without a doubt so the contemporary-day then follows an uncommon route typically called Short Circuit or Fault 
• Any uncommon walking u.s. of the united states of the united states of a power tool is called FAULT. Faults in ultra-contemporary-day embody short circuits similarly to open circuits. Open circuit faults are masses masses an awful lot plenty plenty a good buy a lot much less not unusualplace than short circuit faults, and frequently they`re transformed in to short circuits thru manner of method of subsequent events

Consequences of incidence of Faults 
Faults are of kind Short circuit fault- modern-day Open circuit fault- voltage 
In phrases of seriousness of results of a fault , brief circuits are of an prolonged way greater scenario than open circuits, regardless of the fact that a few open circuits gift a few capability dangers to employees Classification of brief circuited Faults 
• Three phase faults (without or with earth connection) 
• Two phase faults (without or with earth connection) 
• Damage to the device because of abnormally large and unbalanced currents and espresso voltages produced with the beneficial useful beneficial aid of the use of the short circuits 
• Explosions can also furthermore moreover upward thrust up withinside the equipments that have insulating oil, especially in some unspecified time withinside the future of brief circuits. This can also furthermore moreover bring about hearthplace and volatile situations to employees and equipments 
• Individual turbines with decreased voltage in a power station or a hard and rapid of turbines on foot at low voltage can also furthermore moreover cause lack of synchronism, in the long run ensuing in islanding. 
• Risk of synchronous automobiles in large business enterprise premises falling out of step and tripping out.