Question: From the following Universal Torque Equation: T = KI + KV + KVicos(p-T)-K Where: K= Spring Torque (electro-mechanical relay), T = maximum torque =

From the following Universal Torque Equation: T = KI + KV +

From the following Universal Torque Equation: T = KI + KV + KVicos(p-T)-K Where: K= Spring Torque (electro-mechanical relay), T = maximum torque = 90 Derive the equations and sketch the characteristic of: (i) Over-current relay. (ii) Distance relay (Ohm relay). (iii) Reactance relay, and where used.

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