A single-phase two-winding transformer rated 9 0 MVA , 8 0 / 12 0 kV is to be connected as an autotransformer rated 8 0 / 2 00 kV . Assume that the transformer is ideal. (a) Draw a schematic diagram of the ideal transformer connected as an autotransformer. showing the voltages, currents, and dot notation for polarity. (b) Determine the permissible kVA rating of the autotransformer if the winding currents and voltages are not to exceed the rated values as a two-winding transformer. How much of the kA rating is transferred by magnetic induction?
A single-phase two-winding transformer rated 9 0 MVA , 8 0 / 12 0 kV is to be connected as an autotransformer rated 8 0 / 2 00 kV . Assume that the transformer is ideal. (a) Draw a schematic diagram of the ideal transformer connected as an autotransformer. showing the voltages, currents, and dot notation for polarity. (b) Determine the permissible kVA rating of the autotransformer if the winding currents and voltages are not to exceed the rated values as a two-winding transformer. How much of the kA rating is transferred by magnetic induction?
Solution Summary: The author illustrates the schematic diagram of an ideal transformer connected to an auto transformer.
A single-phase two-winding transformer rated
9
0
MVA
,
8
0
/
12
0
kV
is to be connected as an autotransformer rated
8
0
/
2
00
kV
.
Assume that the transformer is ideal. (a) Draw a schematic diagram of the ideal transformer connected as an autotransformer. showing the voltages, currents, and dot notation for polarity. (b) Determine the permissible kVA rating of the autotransformer if the winding currents and voltages are not to exceed the rated values as a two-winding transformer. How much of the kA rating is transferred by magnetic induction?
Problem 1
(a) Suppose the Laplace transform of a causal signal x₁ (t) is given by
S
X₁(s) = 52 +2
Using the Laplace transform properties, find the Laplace transform of the following signal
x2(t).
x2(t) = e2t+1 x₁(t − 1) - tx₁(2t - 1)
(b) Suppose an LTI system T whose impulse response is given by
h(t) e 2t 1(t) t 1(t) +28(t)
What is the transfer function of the system?
(c) If the input x2 (t) is applied to the system T, what will be the output Y₂(s)? Note, you just
need to provide Laplace transform of the output y₂(t).
Simplification is not needed in any part of this question.
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