Description
Diagnose, repair, maintain, and install AC/DC generators and generator-set electrical systems, including windings, regulators, wiring, and controls.
- • Measure voltage, amperage, frequency, rpm, and insulation resistance to diagnose generators, using meters, tachometers, and load banks.
- • Record repairs performed, parts used, test results, and labor time.
- • Disassemble generators, alternators, and gen-sets for inspection and repair, using hand and power tools.
- • Inspect stators, rotors, windings, slip rings or commutators, bearings, and housings for wear or damage.
- • Rewind stator or rotor coils, or replace windings, using coil-winding machines and insulating materials.
- • Varnish, bake, and cure rewound coils to restore insulation integrity.
- • Reface or machine slip rings and commutators to specified tolerances.
- • Replace or repair brushes, brush holders, diodes, and rotating rectifier assemblies.
- • Replace bearings, seals, and fans, and lubricate moving parts.
- • Test and adjust automatic voltage regulators (AVRs), excitation systems, and droop/UFRO settings.
- • Rewire and repair generator leads, control wiring, relays, and breakers per schematics.
- • Solder, braze, or crimp electrical connections and terminations.
- • Clean and dry windings and components; remove carbon, oil, and corrosion with solvents and abrasives.
- • Set up and operate load banks to verify output, stability, and temperature rise.
- • Verify phase rotation, output balance, and equipment grounding.
- • Align generator to engine or drive; check coupling, runout, and clearances.
- • Test for overheating, vibration, and abnormal noise using thermometers and vibration meters.
- • Diagnose and repair starting and charging systems for gen-sets, including starters and alternators.
- • Test, recharge, or replace gen-set starting batteries and service chargers.
- • Read and interpret service manuals, wiring diagrams, and work orders to plan repairs.
- • Assemble and reassemble generators to specifications, verifying clearances and torque.
- • Set and verify protective relays, sensors, and alarms as required.
- • Configure control panels and meters; calibrate voltage, frequency, and power-factor readings.
- • Verify and adjust alignments and dimensions using gauges, dial indicators, and micrometers.
- • Perform insulation, hipot, and surge tests per standards.
- • Use cranes, chain hoists, and rigging to move heavy generators or subassemblies; signal operators when needed.
- • Maintain stocks of parts, tools, and consumables.
- • Document test data, quality checks, and customer reports.
- • Follow safety procedures, including lockout/tagout and arc-flash PPE.
- • Perform onsite installation, commissioning, and field service for generators and auxiliary systems.
Related specializations
Interview options
Interview options
Interviewee gender
Interviewee accent
Available on paid plans only
Interview time
Source
Tasks & skills:
O*NET occupational data (work activities, skills, knowledge).
Learn more
Sources & Standards:
This site includes information from O*NET by the U.S. Department of Labor, Employment and Training Administration (USDOL/ETA), used under the CC BY 4.0 license. Career Clutch has modified some of this information for student readability. USDOL/ETA has not approved, endorsed, or tested these modifications. O*NET® is a trademark of USDOL/ETA.
Last reviewed: Jan 2026
