Earth Leakage Circuit Breaker, Residual Current Device, Earth Leakage Relay & Earth Fault Relay

 Title: ELCB - RCD - ELR - EFR

#################### Video Link: https://youtu.be/Wo7IUzUT-rU

Technical sharing on the following items: 1. ELCB - Earth Leakage Circuit Breaker 2. RCD - Residual Current Device 3. ELR - Earth Leakage Relay 4. EFR - Earth Fault Relay

Earth Fault Vs Earth Leakage (Arus Kerosakan Bumi Vs Arus Bocor Bumi)

 

Arus Kerosakan Bumi / Earth-fault current :

========

- Current flowing to earth due to an insulation fault.

- Arus yang bocor ke bumi apabila ada kegagalan penebat.

Arus Bocor Ke Bumi/ Earth-leakage current :

========

- Current flowing from the live parts to earth or extraneous conductive parts in the absence of an insulation fault.

- Arus bocor ke bumi yang mengalir dari bahagian-bahagian litar HIDUP atau dari bahagian pengalir elektrik (yang HIDUP) dengan ketiadaan kegagalan penebat.

What are their differences?

========

a. Earth fault protection is intended to protect equipment when an insulation fault occurs, for instance a direct contact between a live conductor and earth. In such a situation, great fault currents will flow back to the transformer through its neutral point when its connected to earth

b. This is not the case of earth leakage protection, where faulty currents are generally much lower and the protection is dedicated, for example, to avoid hazards to human beings or animal

Journey to Jurutera Elektrik Kompeten (JEK) Malaysia, Sharing Session with University Malaysia Perlis (UniMaP) 2021

Video Play List Link: Journey to Jurutera Elektrik Kompeten (JEK) Malaysia 

Talk and sharing on Jurutera Elektrik Kompeten (JEK) with University Malaysia Perlis 3rd year electrical engineering student under their Professional Engineer course which consists:

1. Jurutera Elektrik Kompeten (JEK) Presentation 2. JEK Q & A

#PE #PEPC #ProfessionalEngineer #ProfessionalEngineerPracticingCertificate #Malaysian #EET442 #UniMAP #UniversitiMalaysiaPerlis #JEK #JEP #JuruteraElektrikKompeten #SuruhanjayaTenaga #EnergyCommission

Routes To Professional Engineer in Malaysia, Sharing Session with University Malaysia Perlis (UniMaP) 2021

Talk and sharing on Routes to Professional Engineer with University Malaysia Perlis 3rd year electrical engineering student under their Professional Engineer course which consists of 5 parts:

Video Play List on Youtube: Routes to Professional Engineer

01 Introduction 02 Board of Engineers Malaysia 03 Institution of Engineers Malaysia 04 Routes to Professional Engineer in Malaysia 05 Question and Answer #PE #PEPC #ProfessionalEngineer #ProfessionalEngineerPracticingCertificate #Malaysian #EET442 #UniMAP #UniversitiMalaysiaPerlis

Electrical Contactor - Pengenalan serta Spesifikasi / Introduction and Specification

Electrical Contactor - Pengenalan serta Spesifikasi

Video Link in Bahasa Malaysia (Malay): https://youtu.be/mLvUerQ-l0k

Video Link in English: https://youtu.be/mhvNEcBEnqs

Perkongsian mengenai Contactor dalam Bahasa Malaysia 1. Apa itu Contactor? 2. Penerangan Rating Pada Contactor 3. Voltage Sag Immunity dan Kaitan dengan Contactor 4. Jenis-Jenis Utilization Category 5. Making and Breaking Capacity 6. Kriteria Pemilihan Contactor ### NOTA PERCUMA ### Link: https://shorturl.at/gpGR7 ### FREE NOTES ###

Cara - Cara Protection System Mengesan Earth Fault / Earth Fault Detection Methods

 ### VIDEO ###

BAHASA MELAYU Link: https://youtu.be/92r1asm2bEc

ENGLISH Link: https://youtu.be/moV_wr9y5Tk

### VIDEO ### Perkongsian mengenai cara-cara Earth Fault dikesan dalam Protection System: 1. Residual Connection Current Transformers 2. Standby Earth Fault - Neutral to Earthing CT Connection 3. Core Balance CT or Zero Sequence CT 4. Metal Clad Frame Leakage Connection 5. Restricted Earth Fault Connection (REF) 6. Ground Fault or Neutral Displacement Over Voltage (59N) ### NOTA FREE/ FREE NOTES ### Link: https://shorturl.at/AFQ89 ### NOTA FREE ###

Akta Bekalan Elektrik 1990 dan Peraturan Elektrik 1994 Malaysia Berkaitan Keselamatan Elektrik

 ### VIDEO ###

Pautan (Link): https://youtu.be/kXFx3IdRatg

### VIDEO ### Perkongsian mengenai Akta Bekalan Elektrik 1990 dan Peraturan Elektrik 1994 yang berkaitan dengan Keselamatan Elektrik seperti: 1. Kesalahan dan Denda 2. Keperluan Kompeten 3. Perbezaan Kontraktor Perkhidmatan, Kontraktor Elektrik, Kontraktor Pembaikan dan terma-terma lain 4. Circular dan Guideline yang dikeluarkan ST #BahasaMelayu #Malaysia #cruxofelectricalengineering #cruxofee #aktaelektrik1990 #peraturanelektrik1994 #kontraktorelektrikperkhidmatan #kontraktorkelektrik #kontraktorpembaikan #keselamatanelektrik

GPS SIPROTEC 4 Motor Protection Relay

 ### Link Video - https://www.youtube.com/watch?v=4PPvcMTLgzY ###

SIPROTEC 4 7SJ62X Untuk HV Motor (Dalam Bahasa Kebangsaan Bahasa Malaysia) =============== Mari mengenali GPS SIPROTEC 4 (7SJ62X) untuk HT Motor. Siri kali ini akan memaparkan mengenai: - Cara baca drawing Siemens HT Motor di GPS - Protection yang ada - Cara kendalian relay ini seperti event, trip log, test circuit breaker - Bagaimana troubleshoot relay ini apabila Motor Trip atau Stop Jangan lupa kongsi dengan kawan2 ye. Drawing boleh download di sini https://shorturl.at/pvBD7

Cathodic Protection (By CoEE)

Introduction to the world of cathodic protection. This will be a 3 parts series.

Part 1 - https://youtu.be/R0WEo5PTRs0 - Corrosion - CP Theory - Types of CP - Sacrificial Anode - Impressed Current CP

Part 2 - https://youtu.be/BtSUXqleAgM - Typical drawings, installation details of CP - Sacrificial vs ICCP

Part 3 - https://youtu.be/7N7S_T0zFzU - Soil Resistivity Test - Interference and Its Mitigations - Earthing and ICCP - Maintenance Strategies - Acceptance Criterias - CP Design considerations (in general) Presentation Material Download: https://shorturl.at/joAWX

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: https://shorturl.at/ehBLQ Excel file link: https://shorturl.at/goyFG 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: https://shorturl.at/ehBLQ Excel file link: https://shorturl.at/goyFG 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.