A single-phase, 50-kVA, 2400/240-V, 60-Hz distribution transformer has the following parameters: Resistance of the 2400-V winding: R 1 = 0.75 Ω Resistance of the 240-V winding: R 2 = 0.0075 Ω Leakage reactance of the 2400-V winding: X 1 = 1.0 Ω Leakage reactance of the 240-V winding: X 2 = 0.01 Ω Exciting admittance on the 240-V side = 0.00 3 − j 0.0 2 S (a) Draw the equivalent circuit referred to the high-voltage side of the transformer. (b) Draw the equivalent circuit referred to the low-voltage side of the transformer. Show the numerical values of impedances on the equivalent circuits.
A single-phase, 50-kVA, 2400/240-V, 60-Hz distribution transformer has the following parameters: Resistance of the 2400-V winding: R 1 = 0.75 Ω Resistance of the 240-V winding: R 2 = 0.0075 Ω Leakage reactance of the 2400-V winding: X 1 = 1.0 Ω Leakage reactance of the 240-V winding: X 2 = 0.01 Ω Exciting admittance on the 240-V side = 0.00 3 − j 0.0 2 S (a) Draw the equivalent circuit referred to the high-voltage side of the transformer. (b) Draw the equivalent circuit referred to the low-voltage side of the transformer. Show the numerical values of impedances on the equivalent circuits.
Solution Summary: The author illustrates the circuit referred to the high voltage side of transformer. The value of exciting admittance is given as l
A single-phase,
50-kVA, 2400/240-V, 60-Hz
distribution transformer has the following parameters:
Resistance of the 2400-V winding:
R
1
=
0.75
Ω
Resistance of the 240-V winding:
R
2
=
0.0075
Ω
Leakage reactance of the 2400-V winding:
X
1
=
1.0
Ω
Leakage reactance of the 240-V winding:
X
2
=
0.01
Ω
Exciting admittance on the 240-V side
=
0.00
3
−
j
0.0
2 S
(a) Draw the equivalent circuit referred to the high-voltage side of the transformer.
(b) Draw the equivalent circuit referred to the low-voltage side of the transformer. Show the numerical values of impedances on the equivalent circuits.
A positive-going pulse is applied to an inverter. The time interval from the leading edge of the input to the leading edge of the output is 7 ns. This parameter is(a) speed-power product (b) propagation delay, tPHL(c) propagation delay, tPLH (d) pulse width
4- The data sheet of a quad two-input NAND gate specifies the following
parameters: IoH (max.)=0.4 mA, VOH (min.) =2.7 V, VIH (min.) =2V, VIL
(max.)=0.8 V, VOL (max.)=0.4 V, IOL (max.)=8 mA, IL (max.)=0.4 mA, IH
(max.)=20µA, ICCH (max.)=1.6 mA, ICCL (max.)=4.4 mA, tpLH =tpHL=15 ns
and a supply voltage range of 5 V. Determine
(a) The average power dissipation of a single NAND gate,
(b) The maximum average propagation delay of a single gate,
(c) The HIGH-state noise margin and (d) the LOW-state noise margin
Calculate the operating
frequency of the LR circuit in
which: R= 100 N, L=50 H,
Z=6002.
Chapter 3 Solutions
MindTap Engineering for Glover/Overbye/Sarma's Power System Analysis and Design, 6th Edition, [Instant Access], 1 term (6 months)
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