The torque equation T, for such a relay the current actuates the operating torque and…

Electromagnetic relays are those relays which are operated by electromagnetic action. Modern electrical protection relays…

 Zones of Protection system ·         An electric power system is divided into several zones of protection.…

 A faults on transformer winding is controlled in magnitude by  a)                         Source & neutral earthing impedance…

 •                          The power transformer is one of the most important links in a power transmission and…

It is customary to have two elements of over current and one element of earth…