Your protection module reference.

CT/VT ratios, phasors, zones and the complete source-to-trip path.

1. Week 1Draw a fictional one-line and mark protection-zone overlap.
2. Week 2Calculate primary and secondary quantities; distinguish phase current, residual and a separate neutral CT.
3. Week 3Trace source → element → blocking → output → trip circuit.
4. Week 4Prepare phase and residual overcurrent test specifications.

Make it tangible · Labelled one-line, ten conversion examples and a source-to-trip diagram.

Readiness · Given a new CT ratio, predict metering and explain what a pickup test does not prove.

Understand differential stability before designing operating tests.

1. Week 1Calculate winding full-load currents, vector groups, grounding and bases.
2. Week 2Map winding CTs to relay sources; study ratio matching and compensation.
3. Week 3Use the matching T60 manual to calculate operating/restraint points, slopes and harmonic supervision.
4. Week 4Design internal-fault, external-fault, inrush/blocking and backup-overcurrent cases.

Make it tangible · Transformer application note, source map and test matrix.

Readiness · Explain how a CT-ratio change can affect differential behaviour even if the 87 settings fields are unchanged.

Connect fault physics to the quantities a relay actually measures.

1. Week 1Derive per-unit bases, base changes and a Thevenin equivalent.
2. Week 2Convert phase quantities to symmetrical components and back.
3. Week 3Build sequence networks for ground and phase faults; vary grounding.
4. Week 4Compare hand results with a fictional three-bus model.

Make it tangible · Fault-study memo with balanced and unbalanced cases.

Readiness · Distinguish total bus fault current from the current through a particular relay.

Explain why a setting is appropriate, then verify it.

1. Week 1Compare load limits, minimum fault sensitivity and pickup multiples.
2. Week 2Apply the exact inverse-time curve equation and breaker clearing time.
3. Week 3Test directional polarization, forward/reverse response and supervision.
4. Week 4Coordinate three devices under strong and weak source conditions.

Make it tangible · Coordination plot with settings rationale and limitations.

Readiness · Diagnose miscoordination caused by pickup, timing, curve shape or system changes.

Translate system impedance into reach and meaningful test phasors.

1. Week 1Convert primary impedance to relay ohms and plot R-X zones.
2. Week 2Study phase/ground loops and the device’s residual compensation convention.
3. Week 3Explore fault resistance, load encroachment and infeed/outfeed.
4. Week 4Design at least six inside/outside and forward/reverse cases.

Make it tangible · R-X plot, reach calculations and boundary-test matrix.

Readiness · Explain why a point inside the apparent zone may still be blocked or not operate.

Follow protection across terminals and through the breaker.

1. Week 1Compare POTT, PUTT, blocking, direct transfer trip and line differential.
2. Week 2Build truth tables for permissive receipt, channel loss and weak infeed.
3. Week 3Trace breaker-failure initiation, supervision, retrip and backup trip.
4. Week 4Design end-to-end cases with explicit time-reference and uncertainty assumptions.

Make it tangible · Logic diagrams, trip matrix and deliberate nonoperation cases.

Readiness · Explain which terminals trip for internal/external faults with healthy and failed channels.

Build a small defensible study and check the model.

1. Week 1Build a fictional three-to-five-bus case; identify slack, PV and PQ buses.
2. Week 2Vary load, power factor, taps and reactive support.
3. Week 3Study one outage and one weak-source condition.
4. Week 4Export results with Python where licensing permits and independently check units.

Make it tangible · Study memo with base case, variations, checks and a recommendation.

Readiness · Find an incorrect impedance or unit and distinguish power flow, fault and dynamic studies.

Translate protection philosophy into a coherent bay design.

1. Week 1Define zones, CT cores, redundancy and breaker arrangements.
2. Week 2Develop AC/DC schematics, terminals, trip supplies and alarm logic.
3. Week 3Calculate training examples for burden, voltage drop and DC duty.
4. Week 4Prepare a design review, settings-change assessment and FAT/SAT outline.

Make it tangible · Fictional transformer-bay design package and acceptance-test outline.

Readiness · Find wrong CT allocation, missing trip-supply supervision and inconsistent source names.

Build conclusions from measurements and a defensible timeline.

1. Week 1Study COMTRADE scaling, channel definitions, sample rates and time quality.
2. Week 2Separate fault inception, pickup, output, breaker contact and current interruption.
3. Week 3Compare hypotheses for saturation, polarity, inrush and blocking.
4. Week 4Write intended-operation and apparent-misoperation reports using synthetic or public data.

Make it tangible · Annotated plots, timing tables and two concise incident reports.

Readiness · State the evidence for your conclusion and what the available data cannot establish.

Understand the network, protocol and timing paths.

1. Week 1Learn Ethernet, IP, subnets, VLANs, routing, multicast and redundancy.
2. Week 2Trace DNP3 points, scaling, quality, classes, events and controls.
3. Week 3Map IEC 61850 logical nodes, datasets, GOOSE, MMS and Sampled Values.
4. Week 4Compare IRIG-B, PTP, GNSS, holdover and time-quality failure.

Make it tangible · Lab network drawing, point list, packet explanation and failure matrix.

Readiness · Distinguish connectivity, mapping, timestamp and application-logic failures.

Build security around availability, engineering access and recovery.

1. Week 1Inventory assets, trust boundaries, data flows and physical consequences.
2. Week 2Design segmentation, least privilege, jump access and logging in an isolated lab.
3. Week 3Create a baseline and backup, then demonstrate restoration and rollback.
4. Week 4Investigate a fictional unauthorized configuration change or loss of trustworthy time.

Make it tangible · OT architecture, risk register and demonstrated restore record.

Readiness · Explain how each control affects protection availability and how recovery is verified.

Defend an integrated design and its trade-offs.

1. Week 1Compare utility, generator, UPS and limited-source operating conditions.
2. Week 2Identify common-mode failures, maintenance isolation and BESS protection limitations.
3. Week 3Integrate a fictional 115/13.8 kV supply, transformer, feeder and digital network.
4. Week 4Present for 15 minutes and defend five engineering decisions.

Make it tangible · Capstone package and two-page decision memo.

Readiness · Explain an acceptable alternative, why you chose your approach and what evidence would change it.