n the following circuit, the lights (lamps) loads (L) are balanced. Each lamp (L) is set at 500 W and 120 V. The fixed resistance (i.e. lamps) only draws the specified current. The three-phase motor is at 5kW and 0.8 reverse power factor. The secondary side of the transformer (lower part of the network) supplies voltage between 208 V balanced phases (ll-line line). The motor is 1500 meters away from the side (length from the secondary side). Hattin resistance and reactance values are 0.403 ohms for 1000 meters and 0.143 ohms. In that case a) Calculate the phase neutral voltage of the motor. b) Calculate the phase-to-phase voltage of the motor.
Load flow analysis
Load flow analysis is a study or numerical calculation of the power flow of power in steady-state conditions in any electrical system. It is used to determine the flow of power (real and reactive), voltage, or current in a system under any load conditions.
Nodal Matrix
The nodal matrix or simply known as admittance matrix, generally in engineering term it is called Y Matrix or Y bus, since it involve matrices so it is also referred as a n into n order matrix that represents a power system with n number of buses. It shows the buses' nodal admittance in a power system. The Y matrix is rather sparse in actual systems with thousands of buses. In the power system the transmission cables connect each bus to only a few other buses. Also the important data that one needs for have a power flow study is the Y Matrix.
Types of Buses
A bus is a type of system of communication that transfers data between the components inside a computer or between two or more computers. With multiple hardware connections, the earlier buses were parallel electrical wires but the term "bus" is now used for any type of physical arrangement which provides the same type of logical functions similar to the parallel electrical bus. Both parallel and bit connections are used by modern buses. They can be wired either electrical parallel or daisy chain topology or are connected by hubs which are switched same as in the case of Universal Serial Bus or USB.
In the following circuit, the lights (lamps) loads (L) are balanced. Each lamp (L) is set at 500 W and 120 V. The fixed resistance (i.e. lamps) only draws the specified current. The three-phase motor is at 5kW and 0.8 reverse power factor. The secondary side of the transformer (lower part of the network) supplies voltage between 208 V balanced phases (ll-line line). The motor is 1500 meters away from the side (length from the secondary side). Hattin resistance and reactance values are 0.403 ohms for 1000 meters and
0.143 ohms. In that case
a) Calculate the phase neutral voltage of the motor.
b) Calculate the phase-to-phase voltage of the motor.
![](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F79afe9ad-1d28-4f3a-ae9f-ab3841d624a8%2F51560665-abd0-4417-85e7-545d64a1669e%2Fdvpkfrl.png&w=3840&q=75)
![](/static/compass_v2/shared-icons/check-mark.png)
Trending now
This is a popular solution!
Step by step
Solved in 5 steps with 9 images
![Blurred answer](/static/compass_v2/solution-images/blurred-answer.jpg)
![Introductory Circuit Analysis (13th Edition)](https://www.bartleby.com/isbn_cover_images/9780133923605/9780133923605_smallCoverImage.gif)
![Delmar's Standard Textbook Of Electricity](https://www.bartleby.com/isbn_cover_images/9781337900348/9781337900348_smallCoverImage.jpg)
![Programmable Logic Controllers](https://www.bartleby.com/isbn_cover_images/9780073373843/9780073373843_smallCoverImage.gif)
![Introductory Circuit Analysis (13th Edition)](https://www.bartleby.com/isbn_cover_images/9780133923605/9780133923605_smallCoverImage.gif)
![Delmar's Standard Textbook Of Electricity](https://www.bartleby.com/isbn_cover_images/9781337900348/9781337900348_smallCoverImage.jpg)
![Programmable Logic Controllers](https://www.bartleby.com/isbn_cover_images/9780073373843/9780073373843_smallCoverImage.gif)
![Fundamentals of Electric Circuits](https://www.bartleby.com/isbn_cover_images/9780078028229/9780078028229_smallCoverImage.gif)
![Electric Circuits. (11th Edition)](https://www.bartleby.com/isbn_cover_images/9780134746968/9780134746968_smallCoverImage.gif)
![Engineering Electromagnetics](https://www.bartleby.com/isbn_cover_images/9780078028151/9780078028151_smallCoverImage.gif)