Protection System 17.2 Short Circuit Exercise Example (By CoEE)

Technical sharing on Electrical Protection System: 17.2 Short Circuit Exercise Example by Crux of Electrical Engineering, Malaysia. This topic will cover introduction on:

- Exercise for Per Unit Method - Exercise for MVA (ABC) Method

###VIDEO### Yotube video link: https://youtu.be/7oGaAUNTT70 ###Materials### SC Calculation pdf Excel file link Presentation dan komentar mix in English dan Bahasa Melayu. This video is on Chapter 17 (out of 17 Chapters)

Protection System 17.1 Short Ciruit Calculation (By CoEE)

 Technical sharing on Electrical Protection System: 17.1 Short Circuit Calculation by Crux of Electrical Engineering, Malaysia. This topic will cover introduction on:

- Per Unit Method - MVA (ABC) Method

###VIDEO### Yotube video link: https://youtu.be/kU6IwWauugg ###Materials### SC Calculation pdf Excel file link Presentation dan komentar mix in English dan Bahasa Melayu.

This video is on Chapter 17 (out of 17 Chapters)

Protection System 16 Making Sure Everything Works (By CoEE)

 Technical sharing on Electrical Protection System: 16 Making Sure Everything Works by Crux of Electrical Engineering, Malaysia. This topic will cover introduction on:

- Physical Inspection - Insulation Test - CT, VT Tests - Pri and Sec Injection Tests - Stability Test - Functional Test - On Load Test

Yotube video link: https://youtu.be/OO-W-AOygwo Presentation dan komentar mix in English dan Bahasa Melayu. This video is on Chapter 16 (out of 17 Chapters)

Protection System 15 Capacitor Bank Protection (By CoEE)

 Technical sharing on Electrical Protection System: 15 Capacitor Bank Protection by Crux of Electrical Engineering, Malaysia. This topic will cover introduction on:

- Capacitor Problems - Capacitor Rating - Overcurrent - Unbalance Protection

Yotube video link: https://youtu.be/FHLeM1wUV94 Presentation dan komentar mix in English dan Bahasa Melayu. This video is on Chapter 15 (out of 17 Chapters)

Protection System 14 Generator Protection (By CoEE)

Technical sharing on Electrical Protection System: 14 Generator Protection by Crux of Electrical Engineering, Malaysia. This topic will cover introduction on:

- Generator Earthing - OC (51, 51V), Loss of Excitation (40), Negative Sequence (46), Reverse Power (32), Differential (87G) and Frequency Protection (81O, 81U)

Yotube video link: https://youtu.be/-ubCwPEn10A Presentation dan komentar mix in English dan Bahasa Melayu. This video is on Chaper 14 (out of 17 Chapters)

Protection System 13 Motor Protection (By CoEE)

Technical sharing on Electrical Protection System: 13 Motor Protection by Crux of Electrical Engineering, Malaysia. This topic will cover on:

- Overload, Negative sequence, etc. - Short Circuit (by Fuse or Circuit Breaker) - Discrimination for fuse/ circuit breaker with respect to contactor short circuit rating

Presentation dan komentar mix in English dan Bahasa Melayu. Yotube link: https://youtu.be/hI7xtujW7Xo This video is on Chaper 13 (out of 17 Chapters)

SHALL ONE UPGRADE THE SWITCHBOARD IF MOMENTARILY DURING THE SWITCHING (MAKE BEFORE BREAK), THE PROSPECTIVE SC LEVEL EXCEEDS THE SC RATING OF THE BOARD?

A: Issue:

Persons Under Competent Control, Chargeman, Electrical Engineers and Electrical Service Engineers will always perform switching at electrical switchboards from LV to HV. With increase in fault level in the system (due to more generation and more inter-connection), some users may face the issue of the Short Circuit (SC) level exceeding the SC rating of the switchboard such as during momentary parallel of 2 incomers or 2 transformers. So should one change the switchboard just to cater for that few seconds when you momentarily parallel 2 or more sources?

Note: Please read the following with the assumption that the switchboard SC rating is below the SC level of the system during momentarily parallel of 2 or more sources.

B. Risk:

i. If no fault during the switching, no issue.