Power System Protection (MCH 416) - 2018-2019

Software Supporting MCH416

1. Schneider Curve Direct Software Version 3.4.1

2. Schneider Ecodial3.37

3. Symmetrical Components

Class Location

Academic year 2018 - 2019 , 1st semester classes will be conducted at the following location:

Classroom#2 (Faculty Building) on Tuesday at 10:30 am

If you have any complaint you can email me at oyoussef@ieee.org

Office Consultation Hours: Tuesday & Thursday 9:00 - 10:30 & 12:30-13:30

If you have any complaint you can email me at oyoussef@ieee.com

Announcement 19-09-2017: Scheduled Monthly Tests for This Semester (posted 22 Sept 2018)

1. First test: Tuesday 16 Oct. 2018

2. Second test: Tuesday 6 Nov. 2018

3. Third test: Tuesday 27 Nov. 2018

Past Exams

Announcement #1: 4-12-2018 - Final Oral Exam

Final Oral Exam will be held on Tuesday 18-12-2018 at 10:30 a.m.

Announcement #2: 4-12-2018

An extra class will be taken on Thursday 6-12-2018 at 9:00 a.m. replacing

the class of 20-11-2018 (National holiday)

Announcement #3: Sample MCQs paper 11-12-2018

https://sites.google.com/site/omarscu/MCQ-protection-sample.pdf?attredirects=0&d=1

Assignment # 1 - 25-9-2018

http://www.mediafire.com/file/hucl8ixiacwhujb/Assignment_1.pdf/file Due 2-10-2018

Assignment # 2 - 1-10-2018

Students are requested to watch, study, and demonstrate the following 472 video files that covering this course.

https://sites.google.com/site/omarscu/sensors-video%20files.pdf?attredirects=0&d=1

Past Activities

Announcements 2-11-2017

Students are requested to write short note on the following relay types:

50 - 50G - 50N - 50/51 - 51N - 51P – 52 - 87T - 86 - 87 - 87B - 67 - 67G - 67N - 67P - 51V - 32- 46 - 40 - 51V -

1. 50: Fig.98-pp7-82 & Figs 91-92 –pp 7-80

2. 50G: ,, ,, ,, ,, ,,

3. 50N:,, ,, ,, ,, ,,

4. 50/51: ,, , ,, ,, ,,

5. 51N: ,, ,, ,, ,, ,,

6. 51P: ,, ,, ,, ,, ,,

7. 51V: Fig.154, pp 10-62

8. 46: : ,, ,, ,,

9. 40: : ,, ,, ,,

10. 32: Fig.141, pp 10-56

11. 52:

12. 87T: Fig 105, pp8-59

13. 86:

14.87: – Fig. 79, pp 7-71

15. 87B:

16. 67:

17. 67G: Fig.82, pp 10-32

18. 67N:

19. 67P:

Announcements - Transformer Protection Assignment

A 500 kVA, 3-phase, 12kV/480V , 133% operation, Z=5%.

1. A fuse type A155F1DORO-40E is selected on the high voltage side.

2. A fuse class-L type A4BT1000 is selected on the low voltage side.

1. On Select-A-Fuse software, set the above parameters (Transf Þ 3-phase MV then Transf Þ 3-phase LV) , and

2. Print the characteristic curves of both fuses on 2-separate sheets (Fuse data Þ Time-Current curves), and

3. Sketch the protection zone of the transformer on each sheet,

4. Check the suitability of both fuse types and ratings,

5. Check the selectivity between the two fuses Due 19-12-2017

Announcements - Motor Protection Assignement

Reference to gG and gM fuse characteristics at : http://espm.co.uk/BS88%20fuse%20info.pdf

It is required to protect a 3-phase, 415V, 40hp, I_FL=55 A IM and starting current =7I_FL /10sec against OL and SC by fuses. There are 2 options (page 4 of 10):

1. Option 1 is to use gG fuse link with nominal rating 125A

2. Option 2:is to use gM fuse link with nominal rating 100M125

Check the suitability of both fuses by plotting motor starting curve on the t-I characteristic of both fuse links.

Announcements

Students are requested to carry out complete analysis on the network of Example 7- Section 5, and verify the results listed in Fig.54.

Announcements

A 3-phase power transformer with the following nameplate data: 1000kVA, Y/Y, 11kv/380V, z=6%. Calculate the following:

a. full load current on both the primary and secondary sides,

b. the 3-phase bolted SCC on both sides. Due 26-09-2017

Announcements

1. Figs 1&2 Chapter 2: http://www.mediafire.com/file/w04yz2mwcb73kzl/Figs1_and_2-ch2.docx

2. Students are requested to use the following software:

a. "Curve Direct" to plot and compare the t-I characteristics of aM and gG fuse links.

b. "Select-A-Fuse SAF" to plot and compare time-delay and fast acting fuse links.

3. Students are requested to submit the following report:

http://www.mediafire.com/file/kg7ky7dpb0f07pe/Assign1.doc

Announcements

Q1 for IEC 60898 Type-B, C, D, K, Z circuit breakers, identify the following parameters and sketch the time-current characteristics for each type:

1. Conventional non-tripping current for thermal release,

2. Conventional tripping current for thermal release,

3. Holding current for electromagnetic release, and corresponding tripping time,

4. Trip current for electromagnetic release, and corresponding tripping time,

Q2 using one type of electronic trip unit circuit breaker in curve direct software, implement Figs.37,38, and 39 of Chapter 3. Due date 17-10-2017

Q3. A clear copy of Fig23-ch2 is right here:

4.Revision Questions 2-Fuses--: http://www.mediafire.com/download/y2hm4aj06mj9v7t/Revision_Qs_2_Fuses_8_10_2013.rar

5.Solution to Revision Questions 2-Fuses-: http://www.mediafire.com/download/j9y3drs8toykm3u/Revision_Qs_2_Fuses_8_10_2013_Ans.rar password protected

6.Revision Questions 3-Fuses-CBs--:

http://download1485.mediafire.com/f7e83iyov7qg/d751qcbw2xvupz2/Revision+Qs3_Fuses_CBs.pdf

7.Solution to Revision Questions 3-Fuses-CBs: http://www.mediafire.com/download/pokn7o8nbotvppu/Revision_Qs3_Fuses_CBs_Ans.rar password protected

8.Revision Questions 4-CBs-: http://www.mediafire.com/view/d887fuj0cr88lvc/Revision_Qs4_CBs.pdf

9.Solution to Revision Questions 4-CBs-: http://www.mediafire.com/download/c7xcxd9xrublm1o/Revision_Qs4_CBs_Ans.rar password protected

10.Revision Questions 5-CBs--: http://www.mediafire.com/view/xc5h2zix9aa1z36/Revision_Qs5_CBs.pdf

11.Solution to Revision Questions 5-CBs-: http://www.mediafire.com/download/7t27v71g6ba3zy8/Revision_Qs5_CBs_Ans.rar password protected

12.Revision Questions 6-CTs--: http://www.mediafire.com/view/wt1136xe0ca40m1/Revision_Qs6_CT.pdf

13.Solution to Revision Questions 6-CTs-: http://www.mediafire.com/download/rd336y96nn0666g/Revision_Qs6_CTs_Ans.rar password protected

14.Revision Questions 7-OC Protection-: http://www.mediafire.com/view/vcnafkdc17u5sfc/Revision_Qs7_OC_Protection.pdf

15.Solution to Revision Questions 7-OC Protection-: http://www.mediafire.com/download/35nci1d6ev0fcnn/Revision_Qs7_OC_Protection_Ans.rar password protected

16.Revision Questions 8-Selectivity--: http://www.mediafire.com/view/1cwh7lt7zq61cyx/Revision_Qs8_Selectivity.pdf

17.Solution to Revision Questions 8-Selectivity: http://www.mediafire.com/download/dlu6jyio42ms46y/Revision_Qs8_Selectivity_Ans.rar password protected

18.Revision Questions 9-Seletivity--:

http://www.mediafire.com/view/89d12tp9349y4hb/Revision_Qs9_Selectivity.pdf

19.Solution to Revision Questions 9-Selectivity-: http://www.mediafire.com/download/h6w91s6csw68vr1/Revision_Qs9_Selectivity_Ans.rar password protected

20.Revision Questions 10-Motor Protection--:

http://www.mediafire.com/view/eve1tggbf90nga6/Revision_Qs10_Motor_Pro.pdf

21.Solution to Revision Questions 10-Motor Protection-: http://www.mediafire.com/download/ddcvmme8das266f/Revision_Qs10_Motor_Pro_Ans.rar password protected

22.Revision Questions 11-Technical Materials-- :

http://www.mediafire.com/view/4nd27pxx19oi2qn/Revision_Qs11_technical_materials.pdf

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