The O.C.C. test of a DC shunt generator at speed 1500 r.p.m. is: Field current-A 2 4 8 9 10 Armature EMF-V 7.5 135 230 290 310 325 337.5 340 If the generator driven at speed 1200 r.p.m. Detemine: (i) The voltage to which the machine will excite if the field resistance is 31 N. (ii) Critical speed and critical resistance. (iii) The additional resistance in the field circuit to reduce the voltage to 255V. (iv) Without the additional resistance, determine the load current supplied by the generator when its terminal voltage is 240 and the armature resistance is 0.5 N.

The O.C.C. test of a DC shunt generator at speed 1500 r.p.m. is: Field current-A 2 4 8 9 10 Armature EMF-V 7.5 135 230 290 310 325 337.5 340 If the generator driven at speed 1200 r.p.m. Detemine: (i) The voltage to which the machine will excite if the field resistance is 31 N. (ii) Critical speed and critical resistance. (iii) The additional resistance in the field circuit to reduce the voltage to 255V. (iv) Without the additional resistance, determine the load current supplied by the generator when its terminal voltage is 240 and the armature resistance is 0.5 N.

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

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