Electrical · Free · ₹0
Protection Relays: Settings, Testing and Commissioning
Protection relays from the CT to the commissioning record: faults and zones, CTs and VTs, fuses and IDMT curves, overcurrent and earth-fault grading by hand, transformer differential and REF, distance, motor and generator protection, numerical relays and COMTRADE, then primary and secondary injection, trip-circuit and stability tests, and maintenance.
Inside the course
From the lessons
Why protect: faults, zones, selectivity and speed
IIT Roorkee July 2018
Fuses, MCCB trip units and IDMT curves
TestGuy
Transformer differential and restricted earth fault
Romero Engineering Company
Motor and generator protection
IIT Roorkee July 2018
Primary injection and CT tests: ratio, polarity and magnetising curve
OMICRONenergy
Trip-circuit checks, stability tests and commissioning records
Electrical Passionate
Lesson frames belong to the creators named in the Credits below and are shown from YouTube.
What you will learn
Explain why power systems are protected and draw overlapping zones; calculate fault currents from fault levels; check a CT's class and knee point for its duty; read fuse, trip-unit and IDMT curves and calculate IEC and IEEE operating times; set and grade overcurrent and earth-fault relays by hand; set transformer differential and REF protection with ratio and vector compensation; set three-zone distance protection in secondary ohms; set motor and generator protection; manage settings files and read event reports and COMTRADE records; plan and interpret primary injection, CT excitation and secondary injection tests with expected times and tolerances; prove trip circuits and run stability tests; and plan relay maintenance at sensible intervals.
- Calculate fault currents from fault levels and draw overlapping zones of protection
- Check a protection CT's class and knee point against the voltage its duty needs
- Calculate IEC and IEEE inverse-time trip times and read fuse and LSIG trip-unit curves
- Set and grade overcurrent and earth-fault relays by hand with a stated margin
- Set transformer differential with ratio and vector compensation, and design a high-impedance REF scheme
- Set three-zone distance protection in secondary ohms, and motor and generator protection
- Manage relay settings files and read event reports and COMTRADE records
- Plan primary injection, CT excitation, secondary injection, trip-circuit and stability tests with expected results
The course project · about 10 hours
Overcurrent grading and secondary-injection test plan for a three-level 11 kV and 415 V radial network
Grade the phase overcurrent relays on a three-level 11 kV and 415 V radial network from given fault levels, write the relay setting sheet, and write the secondary-injection test plan with expected trip times and tolerances. The sample pack shows each document for a chemical plant's main substation in Gujarat, India.
Sample document pack, 5 documents, filled in for the scenario
- Single lineSingle-line description: process block 11 kV and 415 V supply
- ReportOvercurrent grading study: R3, R2 and R1
- RegisterRelay setting sheet: R1, R2 and R3
- SATSecondary-injection test record: R1, R2 and R3
- Commissioning procedureCommissioning checklist: protection for R1, R2 and R3
Read inside the course and download as a workbook. The project is optional practice, marked when you submit it; the certificate needs only the modules and the final assessment.
Course content
13 modules · 64 lessons · 17h 13m
In order, at whatever pace suits you. Each module ends with a practice task that builds on the last.
- 01Why protect: faults, zones, selectivity and speed2 lessons40m
- 02CTs and VTs: ratio, class, knee point, polarity and saturation4 lessons1h 38m
- 03Fuses, MCCB trip units and IDMT curves4 lessons1h 20m
- 04Overcurrent and earth-fault settings and grading by hand5 lessons1h 58m
- 05Transformer differential and restricted earth fault4 lessons1h 24m
- 06Distance protection for lines: zones and reach5 lessons1h 42m
- 07Motor and generator protection7 lessons2h 3m
- 08Numerical relays: settings files, disturbance records and COMTRADE6 lessons1h 29m
Requirements
- Who it is for
- Intermediate. For electrical engineers, testing and commissioning engineers and technicians, and final-year electrical students. You should know three-phase power, per-unit and basic fault ideas; per-unit and symmetrical components are revised where they are used.
- Software
- A spreadsheet (LibreOffice Calc is free) for the grading and test sheets. SEL ACSELERATOR QuickSet to see how settings are entered, and a COMTRADE viewer, are useful but optional. A relay test set is not required: every test is planned and its results worked on paper. What to download, and how
- Hardware
- None required. Access to a numerical relay and a secondary injection test set at work or college makes the testing modules far more useful.
Software you need
What to download, where from, what it costs and how to install it. Every link goes to the maker's own site, never a mirror.
Nothing to install
A spreadsheet is enough for the grading and test sheets. SEL's ACSELERATOR QuickSet (Windows, from selinc.com/products/5030) is useful to see how relay settings are entered, and any COMTRADE viewer opens fault records; neither is required.
Optional
Useful, not needed to finish the course.
- 01Free
LibreOffice
The Document Foundation
- Runs on
- Windows 10 or 11, macOS 11 or newer (Intel or Apple silicon), Linux
- Account
- None needed
- Size
- up to 1.5 GB of disk space on Windows
LibreOffice is free, open-source software under the Mozilla Public License 2.0, for any use including business. Calc is its spreadsheet.
Steps
- 1.Open the LibreOffice download page.
- 2.Check the page has picked your operating system, then select Download.
- 3.Run the installer (administrator rights are needed on Windows).
- 4.Start LibreOffice Calc for spreadsheet work.
- 5.Save as .xlsx if you need to share files with Excel users.
- Choose the latest main version unless your organisation asks for the older, more conservative release.
Official download pagelibreoffice.org
Checked against each maker's own page on 27 September 2026. Trial lengths and editions change; the maker's page is the final word.
Protection Relays: Settings, Testing and Commissioning at a glance
Protection Relays: Settings, Testing and Commissioning is a free, self-paced online course from EDWartens for electrical, testing and commissioning engineers and technicians who set and test protection relays. It has 13 modules and 17h 13m of video lessons by Romero Engineering Company, OMICRONenergy, NPTEL IIT Kharagpur and others, with written notes and worked problems, a practical project with a document pack and a 15-question final assessment (pass mark 60%). Learning is free with an account; an optional certificate with a public verification code is issued when you pass. Last updated 27 September 2026.
All course factsHide course facts
- Price
- ₹0, free for good. No trial, no card. Comparable classroom training of this length costs about ₹9,999.
- Who it is for
- Electrical, testing and commissioning engineers and technicians who set and test protection relays
- Format
- 13 self-paced modules, 17h 13m of video, written notes, a practice task per module and one final assessment.
- Level
- Intermediate. Intermediate. For electrical engineers, testing and commissioning engineers and technicians, and final-year electrical students. You should know three-phase power, per-unit and basic fault ideas; per-unit and symmetrical components are revised where they are used.
- Brand
- Vendor-neutral
- Software
- A spreadsheet (LibreOffice Calc is free) for the grading and test sheets. SEL ACSELERATOR QuickSet to see how settings are entered, and a COMTRADE viewer, are useful but optional. A relay test set is not required: every test is planned and its results worked on paper.
- Hardware
- None required. Access to a numerical relay and a secondary injection test set at work or college makes the testing modules far more useful.
- Certificate
- Optional EDWartens Certificate of Completion, verifiable by code. Not a vendor credential.
- Video lessons by
- Romero Engineering Company, OMICRONenergy, NPTEL IIT Kharagpur, IIT Roorkee July 2018, Hamada Diab (independent creators, credited below)
- Language
- English
- Last updated
- 27 September 2026
A shareable EDWartens certificate
Finish every module and pass the final assessment, and the optional EDWartens certificate is yours. It carries a unique verification code on a public page anyone can check, so it stands up when a recruiter looks it up. See it below.
The course itself stays free whether or not you ever buy one.
Stuck? Ask a practising engineer
A free course usually means a comment section and hope. This one does not. Every module has an Ask-your-trainer panel that reaches the same engineers who teach our paid programme: people who commission panels for a living, not moderators.
Pairs well with
Electrical · FreeETAP Power System Analysis: Load Flow, Short Circuit, Protection, Arc Flash and StabilityThe power-system studies every substation, plant and data-centre project needs, done in ETAP: single-line modelling, load flow and the per-unit system, cable and transformer sizing, short circuit by IEC 60909 and ANSI, relay setting and coordination with Star view, differential, distance, busbar and motor protection, arc flash, capacitor placement and power factor, motor starting and re-acceleration, transient stability, harmonics and filters, and earthing grid design.
PLC programming · FreeSiemens TIA PortalFrom zero electrical knowledge to a working, simulated S7-1200 program, for nothing.
PLC programming · FreeSiemens TIA Portal in Three HoursThe first three hours of the Siemens TIA Portal course, cut to end on a win: what a PLC is, how it is wired, a project configured in TIA Portal, and your first ladder program running in simulation. Finish it in an evening or two, earn a certificate, and carry straight on into the full course.
PLC programming · FreeTIA Portal: Build a MachineOne machine, start to finish. Take a bottle filling line from a written specification and an I/O list to a structured S7-1200 program with a fill station, a capper, a reject sorter and an operator screen with alarms, then test it against a written record and archive it for hand-over. The lessons are the reference; the machine is yours, and it is what you submit.More free courses: Free electrical design and control panel courses · Free power system and ETAP courses
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Reviews here are written only by learners who have finished every module of Protection Relays: Settings, Testing and Commissioning, and they are published exactly as written. Finish the course and yours will be the first.
Common questions
Who is this protection relay course for?
Electrical engineers, testing and commissioning engineers and technicians, utility and plant electrical staff, and final-year electrical students who need to set and test protection relays. It suits people applying for testing and commissioning roles in India and the Gulf, where relay testing is a standard job requirement.
What do I need to know before starting?
Three-phase power, per-unit quantities and the basic idea of a short circuit. Symmetrical components and per-unit are revised where they are used. No relay or test set experience is needed.
Do I need a relay test set or software?
No. Every setting is calculated by hand or in a free spreadsheet, and every test is planned and its results worked on paper. SEL ACSELERATOR QuickSet and a COMTRADE viewer help you see real settings files and records, and access to a test set at work makes the testing modules more practical.
Which standards does it follow?
The IDMT curves are the IEC 60255 inverse curves and the IEEE C37.112 curves used by numerical relays, records use the COMTRADE format, and maintenance intervals use NERC PRC-005 as a worked example. The course paraphrases these standards; it does not reproduce them, and you should check the edition your plant uses.
How is this different from the ETAP course?
The ETAP Power System Analysis course runs coordination studies in software. This course does the grading by hand and then proves the settings with primary and secondary injection, the way a commissioning engineer works. Taking both is a good combination.
How long does the Protection Relays: Settings, Testing and Commissioning course take?
About 23 hours of video lessons, notes and practice, taken at your own pace; the videos alone are about 17 hours. The optional project takes about 10 hours more.
Is the course free, and what certificate do I get?
Every module, the notes, the project and the final assessment are free. If you pass the 15-question final at 60 percent you can get an EDWartens Certificate of Completion, with a number anyone can verify on our site. It is a certificate of completion, not a licence or a vendor qualification from SEL, OMICRON or any test-set maker.
What jobs does it lead to?
Protection testing and commissioning engineer and technician roles with contractors, utilities and EPC firms, substation maintenance roles, and protection settings work in consultancies. Employers will still expect hands-on time with test sets, which this course prepares you to use well.
Is the Protection Relays: Settings, Testing and Commissioning course free in India, and what does the certificate cost?
Yes. Learning costs ₹0 in India: every module, the written notes, the practice tasks and the final assessment, with no card and no trial period. The only paid item is the optional EDWartens Certificate of Completion, ₹559 including GST for this intermediate course, paid in rupees through Razorpay, and only if you want it after passing the final assessment.
What you walk away with
Your certificate for Protection Relays: Settings, Testing and Commissioning
Finish the course, pass the final, and this is the document with your name on it.
Verifiable by anyone
Adds to LinkedIn in one click
QR code on the certificate
Names what you can do
A permanent link
Earned, not attended
Learning is free. The certificate is optional.
Add it now and pay only when you have finished the course, or come back for it later. One-off, US$28.99, with a receipt.
Issued by EDWartens India (Wartens Automation Private Limited) as a Certificate of Completion for this self-paced course. It is not a vendor certification, a university award or a CPD-accredited activity, and it does not certify competence on live equipment. Delivered electronically; see the refund policy.
Credits
Who made the video lessons
The video lessons in this course were created by the people below, not by EDWartens. Every lesson streams from its creator's own YouTube channel; EDWartens neither hosts nor sells that footage, and the creators are not affiliated with EDWartens and do not endorse this course. What EDWartens wrote is the study plan, the notes, the practice tasks and the assessments.
- Romero Engineering Companythe Power System Protection and Control lessons: CT basics and saturation, calculating SEL and IEEE inverse-time trip times, overcurrent basics, neutral overcurrent of transformers, directional control, transformer differential TAP and compensation settings, harmonic restraint and blocking, restricted earth fault, distance protection, infeed, load encroachment, POTT, motor differential, trip event analysis, one-line and three-line drawings, breaker failure protection and symmetrical components
- OMICRONenergythe Test Universe lessons (QuickCMC, Ramping, Overcurrent, State Sequencer, Advanced Differential, Advanced Distance, Annunciation Checker and XRIO test automation) and the CT Analyzer lessons on protection CT testing, multi-ratio CTs and remanence (playlist https://www.youtube.com/playlist?list=PLzmbZeI1bhu-bwtPfgxqAFE-LyK4DzX0h)
- NPTEL IIT KharagpurNPTEL Power System Protection lectures on current transformers, capacitor voltage transformers, overcurrent relay characteristics, overcurrent coordination, relay coordination with fuses and the numerical relaying concept
- IIT Roorkee July 2018NPTEL Power System Protection and Switchgear lectures on the fundamentals of protective relaying, current-based relaying, distance protection of lines, transformer protection, induction motor protection, and testing, commissioning and maintenance of relays
- Hamada Diabthe Generator Protection Training Series (basics and earthing, 87G differential, reverse power, loss of field, thermal overload) and the Test Universe overcurrent module lesson on a Siemens 7SJ85
- Schweitzer Engineering Laboratories (SEL)the ACSELERATOR QuickSet Device Manager overview, and setting SEL-751 overcurrent and time-overcurrent protection (https://www.youtube.com/watch?v=EtdRdL7Q1is)
- Testing Tech Tipsdownloading and installing settings on SEL relays with ACSELERATOR QuickSet
- Power Globedisturbance recorder analysis and the COMTRADE standard, and NERC PRC-005 protection system maintenance (https://www.youtube.com/watch?v=ciygSshMbr8)
- Doble Engineeringperforming a current transformer excitation test
- Meggerperforming a manual timing test on a protective relay
- TestGuycircuit breaker electronic trip units explained
- Electrical Passionatepre-close and post-close trip-circuit supervision, and calculating currents for a transformer REF stability test (https://www.youtube.com/watch?v=64P0_NgGq9w)
- Circuit Masterclassprotection zones and why they overlap
If you are one of these creators and would like a lesson removed or credited differently, write to info@wartens.com.