A shunt generator has the following open-circuit characteristic at 800 r.p.m. Field amperes 0.5 1.0 1.5...

   

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A shunt generator has the following open-circuit characteristic at 800 r.p.m. Field amperes 0.5 1.0 1.5 2.0 2.5 3.0 3.5 E.M.F. Volt 54 107 152 185 210 230 245 Armature and shunt field resistances are respectively 0.1 2 and 80 2. The terminal p.d. falls to 175 V when the armature current is 100 A. Find the O.C. volts and the volts lost due to (ii) reduction in the field current (ii) armature resistance (ii) amature reaction. [220 V (i) 27 V (ii) 120 V (iii) 8 V] A shunt generator has the following open-circuit characteristic at 800 r.p.m. Field amperes 0.5 1.0 1.5 2.0 2.5 3.0 3.5 E.M.F. Volt 54 107 152 185 210 230 245 Armature and shunt field resistances are respectively 0.1 2 and 80 2. The terminal p.d. falls to 175 V when the armature current is 100 A. Find the O.C. volts and the volts lost due to (ii) reduction in the field current (ii) armature resistance (ii) amature reaction. [220 V (i) 27 V (ii) 120 V (iii) 8 V]