cameroon gce intermediate level electrical machines 3
cameroon gce intermediate level electrical machines 3
TOPIC 1: STUDY OF A SEPARATELY EXCITED DC GENERATOR ON NO- LOAD
Given a D.C. generator with the following characteristics
Pn = 3KW, Vn = 220V, In = 15A, Nn = 1500rpm
You are expected to carry out a No-load test on this motor and determine:
a) The values of the armature and field resistances.
b) The No- load characteristics E = f (if)
c) The value of the residual emf; (Eo)
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TOPIC 2: STUDY OF A SINGLE PHASE TRANSFORMER ON NO- LOAD
You are given a 220V/24V, 50Hz, 160VA transformer
Carry out a No-load test on this transformer and:
a) Determine the transformation ratio
b) Draw the magnetisation curve E2 = f (I1)
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