Lesson 1Essential Hand and Power Tools for Rotating Machines and TransformersOutlines key hand and power tools for rotating machines and transformers, including how to choose, use correctly, and maintain pullers, drivers, wrenches, drills, grinders, and torque tools to prevent damage and ensure dependable repairs in local workshops.
Screwdrivers, spanners, and torque wrenchesBearing pullers and fitting toolsElectric and pneumatic impact toolsDrills, taps, and thread repair kitsGrinders, sanders, and surface prep toolsTool storage, inspection, and maintenanceLesson 2Lockout/Tagout Procedures for Electrical and Mechanical EquipmentDescribes lockout/tagout steps for electrical and mechanical equipment, covering isolation points, lock types, tagging rules, group lockout, verification processes, and removal methods to stop unexpected energization during repairs.
Identifying isolation points and boundariesPersonal locks, hasps, and group boxesTag information and language requirementsVerification of zero energy stateShift change and group lock managementRestoring equipment to service safelyLesson 3Mechanical Measuring and Removal Tools: Micrometer, Dial Indicator, Bore Gauge, Bearing Puller, Hydraulic PressExplains mechanical measuring and removal tools for machines, such as micrometers, dial indicators, bore gauges, bearing pullers, and hydraulic presses, focusing on precision, alignment, and safe force use in Eritrean repair environments.
Using micrometers and vernier calipersDial indicators for runout and alignmentBore gauges for housing and sleeve checksBearing puller selection and setupHydraulic press safety and load limitsRecording fits, clearances, and tolerancesLesson 4Lifting, Rigging, and Handling Equipment for 7.5 kW Motors and 25 kVA TransformersDiscusses safe lifting, rigging, and handling of 7.5 kW motors and 25 kVA transformers, including weight estimates, sling and shackle choices, center-of-gravity management, and using hoists, jacks, and skates in tight Eritrean workshops.
Estimating motor and transformer weightsSelecting slings, shackles, and eyeboltsCenter of gravity and balance controlUsing chain blocks, hoists, and jacksMoving loads with rollers, skates, and pry barsRigging inspection and rejection criteriaLesson 5Electrical Test Instruments: Multimeter, Clamp Meter, Insulation Tester, Hipot, Phase Rotation TesterIntroduces main electrical test instruments for machine repair, detailing functions, ranges, limits, and safe use of multimeters, clamp meters, insulation testers, hipot sets, and phase rotation testers on motors and transformers in Eritrea.
Multimeter functions and measurement rangesClamp meter use for load and inrush currentInsulation resistance tester test voltagesHipot tester purpose and risk controlsPhase rotation tester use on motor feedersInstrument category ratings and fusingLesson 6Isolation, Discharge, and Grounding of Motor and Transformer CircuitsCovers isolation, discharge, and grounding of motor and transformer circuits, including switching steps, stored energy risks, discharge tools, temporary grounds, and confirming de-energized state before contact work in local facilities.
Identifying all energy sources and feedersProving dead with approved testersCapacitor and winding discharge methodsApplying and removing temporary groundsGrounding of transformer tanks and coresSignage and barriers around isolated gearLesson 7Personal Protective Equipment for Electrical and Oil-Filled Transformer WorkSpecifies personal protective equipment for electrical and oil-filled transformer tasks, including arc-rated clothing, gloves, face shields, respiratory gear, and oil-resistant items, plus selection based on task and incident energy in Eritrean contexts.
Arc-rated clothing categories and limitsInsulating gloves and leather protectorsFace shields, goggles, and hearing protectionRespirators for fumes and oil mistsOil-resistant footwear and apronsPPE inspection, testing, and replacementLesson 8Fire, Spill, and Spill-Containment Precautions for Transformer OilOutlines fire, spill, and containment measures for transformer oil, covering fire classes, extinguishers, bunding, absorbents, emergency steps, and reporting for leaks during maintenance and testing in Eritrean workshops.
Fire classes and suitable extinguishersOil storage, bunds, and drip traysSpill kits, absorbents, and neutralizersImmediate actions for small and large spillsReporting, documentation, and cleanup recordsPreventive inspection of tanks and hosesLesson 9Personal and Environmental Controls for Varnish, Solvents, and Insulating OilDetails safe handling of varnish, solvents, and insulating oil, including ventilation, temperature management, spill prevention, labeling, and waste disposal to safeguard workers, equipment, and the environment during repairs in Eritrea.
Ventilation and fume extraction setupFlash point, ignition sources, and hot workSolvent-compatible gloves and PPEStorage, labeling, and segregation rulesWaste collection and disposal proceduresMonitoring exposure and health symptomsLesson 10Calibration, Verification, and Safe Use of Test InstrumentsEmphasizes calibration, verification, and safe operation of test instruments, covering traceability, functional tests, insulation tester checks, hipot safety features, and recording calibration status before key measurements in local settings.
Calibration intervals and traceabilityField verification with check sourcesLabeling calibration status and due datesHandling damaged or suspect instrumentsSafe test lead selection and inspectionRecording measurement uncertainty notesLesson 11Documentation, Tagging, and Work Permit Procedures for Repairs and TestsAddresses documentation, tagging, and work permit processes for repairs and tests, including job plans, risk assessments, isolation tags, test records, and sign-off needs to ensure traceable and auditable maintenance in Eritrean operations.
Job cards, repair orders, and scope definitionRisk assessments and method statementsTagging of removed parts and connectionsTest reports and measurement traceabilityPermit-to-work types and approvalsShift handover and record retention
