The system in Figure 1 below represents a radial system network which consists of two downstream...
Fantastic news! We've Found the answer you've been seeking!
Question:
Transcribed Image Text:
The system in Figure 1 below represents a radial system network which consists of two downstream fuses, four overcurrent relays and two power transformers. In order to carry out a system analysis before a relay coordination study of the system, it is necessary to refer all the system impedances to a common base and thus using 10MVA as the reference base. Let the discrimination between relays be 0.4 sec. This is a challenging problem for the students to test their knowledge gain from the course ELPE 406. The graph in Figure 2 below illustrates the final discrimination curves of the system. The student has to work out how these curves have been achieved using the data given below and discuss the coordination between the relays at each level. 132kV 10MVA 0.29% Source 132kV E 1 D 15,000 Meters 240mm² Overhead Line 6.290 R₁ CT₁ Rs CTs T₂ -*-M -XMA 500/1A 150/1A Relays Plug Setting 100% 11kV C B | I 2,000 Meters 30MVA 132/11kV 22.5% 240mm² Cable 0.2402 R₂ CT₂ -X AA 500/5A 200 Meters 120mm² Cable 0.0402 R₁ CT T X-MA 3.3kV A I 7250/5A Fuses Type gG Figure 1: Challenge Problem - Radial Network Diagram 200A 4MVA 150A 11/3.3kV 7% Device Fuse 100A Fuse 150A Relay R1 Relay R2 Relay R3 Relay R4 Curve type PS% Relay - Fuse Settings CT Ratio I Pickup Trf Ratio TMS The system in Figure 1 below represents a radial system network which consists of two downstream fuses, four overcurrent relays and two power transformers. In order to carry out a system analysis before a relay coordination study of the system, it is necessary to refer all the system impedances to a common base and thus using 10MVA as the reference base. Let the discrimination between relays be 0.4 sec. This is a challenging problem for the students to test their knowledge gain from the course ELPE 406. The graph in Figure 2 below illustrates the final discrimination curves of the system. The student has to work out how these curves have been achieved using the data given below and discuss the coordination between the relays at each level. 132kV 10MVA 0.29% Source 132kV E 1 D 15,000 Meters 240mm² Overhead Line 6.290 R₁ CT₁ Rs CTs T₂ -*-M -XMA 500/1A 150/1A Relays Plug Setting 100% 11kV C B | I 2,000 Meters 30MVA 132/11kV 22.5% 240mm² Cable 0.2402 R₂ CT₂ -X AA 500/5A 200 Meters 120mm² Cable 0.0402 R₁ CT T X-MA 3.3kV A I 7250/5A Fuses Type gG Figure 1: Challenge Problem - Radial Network Diagram 200A 4MVA 150A 11/3.3kV 7% Device Fuse 100A Fuse 150A Relay R1 Relay R2 Relay R3 Relay R4 Curve type PS% Relay - Fuse Settings CT Ratio I Pickup Trf Ratio TMS
Expert Answer:
Related Book For
Project Management The Managerial Process
ISBN: 9781260570434
8th Edition
Authors: Eric W Larson, Clifford F. Gray
Posted Date:
Students also viewed these accounting questions
-
This case study on project evaluation is applicable for beginning courses in corporate finance or finance strategy. Two alternative investment options are available to evaluate. Challenges are...
-
This case study on project evaluation is applicable for beginning courses in corporate finance or finance strategy. Two alternative investment options are available to evaluate. Challenges are...
-
You are in the market for a new car and have narrowed your search down to two types: Car X costs $36,300, will last for four years, and will be worth $3,630 at the end of its useful life. It will...
-
An antenna with a pattern solid angle of 1.5 (sr) radiates 60 W of power. At a range of 1 km, what is the maximum power density radiated by the antenna?
-
Dan and Cheryl are married, file a joint return, and have no children. Dan, age 45, is a pharmaceutical salesman and Cheryl, age 42, is a nurse at a local hospital. Dans SSN is 400-20-1000 and...
-
Assuming the same data as given in problem 9, was the well in each case profitable? Discuss your answer. Problem 9:- Property cost (acquisition cost). Drilling cost (one well). Estimated completion...
-
Tierney County Total Governmental Funds Preclosing Trial Balance December 31, 20X5 Debit Credit Additional Information 1. The beginning trial balance of the general capital assets and general...
-
When considering the system resource model, Owens College would be viewed as effective; it receives a steady flow of highly academically qualified students and obtains significant endowment growth...
-
On December 31, Y3, Aylmer Industries Inc. purchased 85% of the outstanding shares of Belmont Inc. The purchase price is indicated on the excel file. The entry has been recorded on the books of...
-
Make a class called Reverse.java. Make a method reverse that accepts two parameters: a Scanner representing an input file, and a PrintStream representing an output file. Your method should read the...
-
Health System experienced a 10% net increase in cash flow in 2021. While cash flow increased, the net income declined by 10%. In your own words, what are some reasons this could have occurred? Hint:...
-
Which taxpayer has propertyFor Tax Year 2022, a taxpayer generally may elect to immediately claim up to what amount for the Section 179 deduction? that is depreciable? Kelly owns a townhouse and...
-
Discuss whether capital markets are efficient or not, and how public good news like firm announcing that the actual earnings per share is greater than market expectations would affect the firm's...
-
Using the Percentage of Sales method, you calculated your Cost of Goods Sold to be $5,000, on $20,000 in sales for last month. Using the same method, what will your Cost of Goods Sold be for this...
-
Jeff loaned Mike $8,000, which Mike agreed to repay with interest. Mike is making monthly payments of $350 to Jeff, which includes $50 in interest. How should Jeff report this income? Jim is not...
-
A hypothetical species has one ear on the front of their head and one ear on the back of their head, with each ear having a unique pinna shape. Which of the following sounds would be most difficult...
-
Don Griffin worked as an accountant at a local accounting firm for five years after graduating from university. Recently, he opened his own accounting practice, which he operates as a corporation....
-
What aspects of the Arthur Andersen culture contributed to the scandal?
-
Describe the four phases of the traditional project life cycle. Which phase do you think would be the most difficult one to complete?
-
What do you think Dan Gold is referring to when he argues that all parties must make a concerted effort to work as partners?
-
The microfinance concept has been a blessing for many people in developing countries. Its success there causes some to wonder if it can spur growth in areas of developed nations that need...
-
An institution that many people know little about and some governments find worrisome is offshore financial centers. They operate with little oversight, few regulations, and often little taxation....
-
What is the appeal of the eurocurrency market?
Study smarter with the SolutionInn App