please give me the answers for all this questions 1. In order to improve the power factor for a single phase load P, where PFold= 0.4, PF new=0.90, (Vnew Vold), if the new per phase transmission losses (after improvement)PLosses.new= 80 kW, the old losses (before) PLosse-old is:b. 405 kWc. 310 kW d. 275 kWa. 425 kWe. 225 kW29302. If the voltage regulation of a transformer VR-5.4 % while the no load output voltageVEL 11.1 kV, The full load voltage VNL is:a. 11 kVb. 11.2 kV c. 11.4 kV d. 11.7 kV e. 11.9 kV3. To design a 3-phase line has conductors 4 cm in diameter, with the dielectric strength of air is30 kV (max) per cm, air density factor 8 = 0.90 and irregularity factor mo = 0.925 ,disruptivecritical voltage for the line (Vc L-L) = 252.815 kV, (the distance d) for spaced conductoraequilaterally is :a. 200 cmb. 185 cmd. 100 cmc. 125 cme. none4. A 50 Hz, 3-phase line has conductors 3 cm in radius, spaced 2 metres apart in equilateralwith disruptive critical voltage for the line (Vc phase) = 150 kV, air density factor 80-90at applied voltage V=165 kV per phase, the corna loss in kW/phase/km is :b. 6.323a. 5.561c. 8.225d. 10.433 e. none

In order to improve the power factor for a single phase load P, where PFold= 0.4, PF new 0.90, (Vnew Vold), if the new per phase transmission losses (after improvement) PLosses.new-80 kW, the old losses (before) PLosse-old is: a. 425 kW b. 405 kW c. 310 kW d. 275 kW e. 225 kW

In order to improve the power factor for a single phase load P, where PFold= 0.4, PF new 0.90, (Vnew Vold), if the new per phase transmission losses (after improvement) PLosses.new-80 kW, the old losses (before) PLosse-old is: a. 425 kW b. 405 kW c. 310 kW d. 275 kW e. 225 kW

Power System Analysis and Design (MindTap Course List)

6th Edition

ISBN:9781305632134

Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Chapter2: Fundamentals

Section: Chapter Questions

Problem 2.14MCQ: The instantaneous power absorbed by the load in a single-phase ac circuit, for a general R LC load...

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Concept explainers

Short Transmission Line

A short transmission line is a transmission line that has a length less than 80 kilometers, an operating voltage level of less than 20 kV, and zero capacitance effect.

Power Flow Analysis

Power flow analysis is a topic in power engineering. It is the flow of electric power in a system. The power flow analysis is preliminary used for the various components of Alternating Current (AC) power, such as the voltage, current, real power, reactive power, and voltage angles under given load conditions and is often known as a load flow study or load flow analysis.

Complex Form

A power system is defined as the connection or network of the various components that convert the non-electrical energy into the electric form and supply the electric form of energy from the source to the load. The power system is an important parameter in power engineering and the electrical engineering profession. The powers in the power system are primarily categorized into two types- active power and reactive power.

Question

please give me the answers for all this questions

1. In order to improve the power factor for a single phase load P, where PFold= 0.4, PF new=
0.90, (Vnew Vold), if the new per phase transmission losses (after improvement)
PLosses.new= 80 kW, the old losses (before) PLosse-old is:
b. 405 kW
c. 310 kW d. 275 kW
a. 425 kW
e. 225 kW
2930
2. If the voltage regulation of a transformer VR-5.4 % while the no load output voltage
VEL 11.1 kV, The full load voltage VNL is:
a. 11 kV
b. 11.2 kV c. 11.4 kV d. 11.7 kV e. 11.9 kV
3. To design a 3-phase line has conductors 4 cm in diameter, with the dielectric strength of air is
30 kV (max) per cm, air density factor 8 = 0.90 and irregularity factor mo = 0.925 ,disruptive
critical voltage for the line (Vc L-L) = 252.815 kV, (the distance d) for spaced conductor
aequilaterally is :
a. 200 cm
b. 185 cm
d. 100 cm
c. 125 cm
e. none
4. A 50 Hz, 3-phase line has conductors 3 cm in radius, spaced 2 metres apart in equilateral
with disruptive critical voltage for the line (Vc phase) = 150 kV, air density factor 80-90
at applied voltage V=165 kV per phase, the corna loss in kW/phase/km is :
b. 6.323
a. 5.561
c. 8.225
d. 10.433 e. none

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