![subject](/tpl/images/cats/User.png)
Engineering, 20.04.2020 10:23 larageorge
The customer is not greatly concerned with an inefficient power factor, provided that sufficient
power reaches the load. To make the customer more aware of power factor considerations, the
power company may install a penalty on the customer’s bill. A typical penalty power factor chart
is shown in Table 1. Power factors below 0.6 are not permitted, if a customer records power
factor below 0.6 a 25 percent penalty is applied.
Table 1. Penalty for low power factor
Power factor Penalty
0.9 and higher none
0.8 to 0.899 1%
0.7 to 0.799 2%
0.6 to 0.699 3%
An industrial plant you work for connects four loads in parallel to a 400V, 50 Hz supply.
Load 1 absorbs 50 kVar at 0.7 lagging, load 2 absorbs 15 kW and generates 5 kVar, and
load 3 absorbs 5 kW at unity power factor, load 4 has an impedance of 20∠55°.
a) Calculate the branch currents and draw the phasor diagram
b) What % penalty does the company risk facing on its next bill?
c) As an electrical engineer in charge of power factor correction, with a p. f target of unity,
recommend the rating of element or equipment in kVar to use so as to avoid penalties.
- provide the branch currents and the phasor diagrams
- draw the power triangles before and after power factor correction.
d) Verify your answers using Matlab/Simulink
- show the rms currents on the Simulink model
![ansver](/tpl/images/cats/User.png)
Answers: 2
![](/tpl/images/ask_question.png)
![](/tpl/images/ask_question_mob.png)
Another question on Engineering
![question](/tpl/images/cats/User.png)
Engineering, 03.07.2019 14:10
The y form of iron is known as: a) ferrite b) cementite c) perlite d) austenite
Answers: 3
![question](/tpl/images/cats/User.png)
Engineering, 04.07.2019 18:10
The mass flow rate of the fluid remains constant in all steady flow process. a)- true b)- false
Answers: 1
![question](/tpl/images/cats/User.png)
Engineering, 04.07.2019 18:10
Steel is coated with a thin layer of ceramic to protect against corrosion. what do you expect to happen to the coating when the temperature of the steel is increased significantly? explain.
Answers: 1
![question](/tpl/images/cats/User.png)
Engineering, 04.07.2019 18:10
For the closed feedwater heater below, feedwater enters state 3 at a pressure of 2000 psia and temperature of 420 °f at a rate of ix10 ibhr. the feedwat extracted steam enters state 1 at a pressure of 1000 psia and enthalpy of 1500 btu/lbm. the extracted er leaves at an enthalpy of 528.7 btu/lbm steam leaves as a saturated liquid. (16) a) determine the mass flow rate of the extraction steam used to heat the feedwater (10) b) determine the terminal temperature difference of the closed feedwater heater
Answers: 3
You know the right answer?
The customer is not greatly concerned with an inefficient power factor, provided that sufficient
Questions
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 08.11.2021 08:50
![question](/tpl/images/cats/himiya.png)
Chemistry, 08.11.2021 08:50
![question](/tpl/images/cats/istoriya.png)
![question](/tpl/images/cats/obshestvoznanie.png)
Social Studies, 08.11.2021 08:50
![question](/tpl/images/cats/istoriya.png)
![question](/tpl/images/cats/en.png)
English, 08.11.2021 08:50
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/en.png)
![question](/tpl/images/cats/himiya.png)
Chemistry, 08.11.2021 08:50
![question](/tpl/images/cats/fizika.png)
![question](/tpl/images/cats/informatica.png)
Computers and Technology, 08.11.2021 08:50
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/health.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 08.11.2021 08:50
![question](/tpl/images/cats/mat.png)
Mathematics, 08.11.2021 08:50
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/health.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 08.11.2021 08:50
![question](/tpl/images/cats/mat.png)
Mathematics, 08.11.2021 08:50