Question

Calculate the sequence components of line to line voltage of 380 V balanced system.

Answer #1

A balanced three-phase Y-? system has Vab = 380
V rms and Z?=? If the line
impedance per phase is (0.1 + j0.4)? and total complex power
delivered to the load (8+7j)KVA
a) find line current
b) find the voltage load
c) find the current load
d) find Z?
f) simulation for this circuit on the
MULTISIM

A three phase balanced resistive load has a line voltage VL =
381.05 V and line current IL = 30 A. Calculate 1) the total power
taken by the load 2) the power taken by each phase of the load.

1.In a ∆ − ? system, a phase voltage of 120 V produces a line
voltage of:
a. 207.8460 V
b. 120 V
c. 110 V
d. 141 V

calculate the line and neutral currents for the following
unbalanced wye-connected impedances:
Zan = 2 + j5 Ω
Zbn = 8 + j0 Ω
Zcn = 1 - j15 Ω
the voltage source is a balanced three-phase system, 208 V line
to line. Assume an abc phase sequence and use Van as the reference
phasor.

A balanced positive-sequence, Y-connected generator has an
impedance of 0.3+j0.6 Ω/Φ, the terminal RMS voltage of the source
is 380V. The generator feeds a balanced, three-phase, Δ-connected
load having an impedance of 27 + j42 Ω/Φ. The impedance of the line
connecting the generator to the load is 0.6+j1.2 Ω/Φ.
1. Calculate the three line currents.
2. Calculate the line voltages at the terminals of the load.
3. Calculate the phase load currents.
4. Calculate the line voltage at the...

The magnitude of the phase voltage of an ideal balanced
three-phase Y-connected source is 110 V . The source is connected
to a balanced Y-connected load by a distribution line that has an
impedance of 0.1+0.8i Ω/ϕ . The load impedance is 20.2+14.8i Ω/ϕ .
The phase sequence of the source is acb. Use the a-phase voltage of
the source as the reference.
Part A: Specify the magnitude and phase angle of the line
current IaA.
Part B: Specify the...

A 70.7 (line voltage) three phase star connected source is
connected to a balanced delta load having impedance of 14.14 +
j14.14 ohms for each phase. Assuming abc sequence, find
a) Line currents
b) Total 3 phase power

A transformer has 380 primary turns and 1140 secondary turns.
The input voltage is 120 V and the output current is 16.5A . Assume
100% efficiency.
A) What is the output voltage?
B) What is the input current?

The symmetrical components of voltage in an unbalanced system
are given as Vbo = 30 angle-30 V, Vb1 = 450angle-120 V, and Vb2 =
225<160 V. The component currents are Ibo = 10190 A, Ib1 =
6260 A, and Ib2 = 5170 A. Determine the complex power drawn by
the load using the method of: i) symmetrical components ii)
unbalanced phase components.

A balanced ?-connected load has an impedance of 60+ j45 ? per
phase. The load is fed through a line having an impedance of 0.8+
j0.6 ? per line. The phase voltage at the terminals of the load is
???????? = 480 ?? . The sequence is positive. Use AB v as the
reference at the load. The source is required to be calculated for
either Wye or Delta connection. a) Draw the 3-phase system b) Draw
the a-phase equivalent...

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