A single-phase three-winding transformer has the following parameters: Z 1 = Z 2 = Z 3 = 0 + j 0.05 , G c = 0 , and B M = 0.2 per unit. Three idenucal transformers, as described, are connected with their primaries in Y (solidly grounded neutral) and with their secondaries and tertiaries in Δ . Draw the per-unit sequence networks of this transformer bank.
A single-phase three-winding transformer has the following parameters: Z 1 = Z 2 = Z 3 = 0 + j 0.05 , G c = 0 , and B M = 0.2 per unit. Three idenucal transformers, as described, are connected with their primaries in Y (solidly grounded neutral) and with their secondaries and tertiaries in Δ . Draw the per-unit sequence networks of this transformer bank.
Solution Summary: The author explains that the transformer bank's positive and negative sequence networks will be the same. The primary and secondary windings are connected in star fashion.
A single-phase three-winding transformer has the following parameters:
Z
1
=
Z
2
=
Z
3
=
0
+
j
0.05
,
G
c
=
0
, and
B
M
=
0.2
per unit. Three idenucal transformers, as described, are connected with their primaries in Y (solidly grounded neutral) and with their secondaries and tertiaries in
Δ
. Draw the per-unit sequence networks of this transformer bank.
A digital radio communication system receives a signal with signal power Sof 3 µW, and noise level of 200 nW, on a radio channel with upper cut-offfrequency of 2.42 GHz, and a lower cut-of frequency of 2.40GHz.
What is the maximum information bit rate (net bit rate exclusive of forward error correction codes) that can be supported by this line, in theory, according to ShannonHartley?
Simplify the following Boolean function and expression, using four-variable maps
a) cF(w,x,y,z) = Σ (2,3,10,11,12,13,14,15)
b) dF = x’z + w’xy’ + w(x’y + xy’)
c) eF = A’B’C’D’+AC’D’+B’CD’+A’BCD+BC’D
A regional telephone company had 5.2 million subscribers. Each of their telephones is connected to a central office by a copper twisted pair. The average length of these twisted pairs is 3.5 km. How much is the copper in the local loops worth? Assume that the cross section of each strand is a circle 1.2 mm in diameter, the density of copper is 8.4 grams/cm3, and that copper sells for $15.00 per kilogram.
Chapter 3 Solutions
Power System Analysis and Design (MindTap Course List)
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