Description
Install, test, calibrate, troubleshoot, and maintain protective relays and associated control circuits in substations and generating stations to ensure reliable system protection and operation.
- • Install, test, calibrate, maintain, and repair protective relays and control circuits in substations and generating stations.
- • Inspect and test protection and control equipment using schematics and meters (ohmmeters, voltmeters, ammeters).
- • Consult manuals, drawings, settings sheets, and engineers to troubleshoot and optimize relay schemes.
- • Coordinate and notify operations of equipment clearances, relay outages, and test activities.
- • Isolate and restore relays and circuits by operating switches and applying safe clearance procedures.
- • Document test results, settings, calibrations, repairs, and maintenance activities.
- • Analyze test data, fault records, and event reports to diagnose issues and verify performance.
- • Perform insulation resistance, polarity, ratio, and burden tests on control wiring and CT/PT circuits.
- • Troubleshoot and replace relays, transducers, trip coils, instrument transformers, and control components.
- • Remove and install protective relays, draw-out cases, relay panels, and wiring harnesses per standards.
- • Plan and execute commissioning and functional testing of new or modified protection and control schemes.
- • Perform continuity, phasing, and point-to-point checks on CT, PT, trip, and interlock circuits; record results.
- • Terminate, label, and verify control and communication wiring to drawings and color codes; supervise contractors as needed.
- • Conduct secondary injection and end-to-end relay testing using calibrated test sets and communications simulators.
- • Maintain inventories of spare relays, test equipment, and control parts, requisitioning items as needed.
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Advanced Manufacturing
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O*NET occupational data (work activities, skills, knowledge).
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Last reviewed: Jan 2026
