Why this work stays in the field
The job is built around live high-voltage equipment. A relay technician opens and closes switches to isolate a circuit, tests protective relays against their settings, and traces a fault through a substation that may be decades old. Software can suggest where to look. It cannot stand in the yard, confirm a bus is dead, and put hands on a breaker mechanism.
Two tasks show why. Calibrating and trip-testing a protective relay means injecting test currents, reading the response, and judging whether the scheme will clear a fault in the right order. Inspecting and repairing transformers, oil circuit breakers and switchgear means finding wear, contamination or loose connections that no sensor flagged. Both depend on touch, sight, smell and a tolerance for consequence.
Safety rules add another layer. Switching orders, lockout and tagout, and clearance paperwork all need a named, accountable person. That is a legal and contractual arrangement, not a technical gap, and it holds across the utilities sector. Pay reflects the scarcity of the skill: median annual pay is $103,020 and US employment is about 20,720 (BLS, 2025).
What AI does, assists with, and leaves to people
The clearest wins are on paper. Writing up test reports, pulling settings from relay manuals and schematics, summarizing past work orders and drafting maintenance records are all tasks a model can carry a long way. Our coverage figure, the share of task time within reach of AI today, is 19 out of 100, and the method behind it is on the coverage page. The share of task time AI can handle on its own is 0%.
Assisted work is where most of the change lands. Interpreting SCADA and event-recorder data after a trip, and narrowing down which relay or CT caused a misoperation, both get faster when pattern tools sort the records first. Condition monitoring on transformers does something similar: it tells you what to check sooner. The assisted share is 35%, and the technician still makes the call.
What stays with people is the physical and accountable core: switching and grounding, torqueing and replacing parts, commissioning new protection schemes, and signing off that a circuit is safe to re-energize. That group holds 65% of task time.
What the evidence shows
There is no published head-to-head test of an AI system against a qualified relay technician on this job’s real tasks. Our quality-parity grade is D, which means not measured, so we publish no parity number for it. The evidence list above shows what we are drawing on and how each item is graded; the wider approach is set out in our scoring method.
What would settle it is specific and testable. A benchmark where a model diagnoses recorded relay misoperations from event files and is scored against technician findings. A field trial where a robot performs a routine breaker inspection end to end. Published utility data on how often an AI-assisted diagnosis changed the repair. Until something like that exists, treating a general automation probability as a measurement of this job overstates what anyone knows.
When the picture could change
Most likely after 2045 (8 in 10 of our scenarios). The replacement-year method explains what that window covers and what it does not.
Two things could pull it earlier. Digital substations with IEC 61850 relays and remote test access cut the number of trips a technician has to make. And grid-scale sensor coverage, paired with analytics, moves more work from scheduled inspection to targeted repair, which shrinks routine hours.
Two things push it later. The hardware needed to do the physical part sits in a dexterous humanoid class, and that machinery is not deployed in live yards; our guide to robots and physical work covers how far behind the hardware runs. The installed base is also old and non-standard, with electromechanical relays, mixed vintages and site-specific wiring that resists any single automated procedure. Utility safety regulation and the sign-off chain slow adoption further.
Good to know: BLS projects employment in this occupation growing about 9.7% from 2025 to 2035, as grid rebuilds and new interconnections add protection work (BLS projections, 2025-35).
How to stay needed as a relay technician
Lean into the tasks that carry accountability. Commissioning and acceptance testing of new protection schemes. Fault investigation after a misoperation, where the written explanation matters as much as the fix. And switching, grounding and clearance work, where a person’s signature is the control.
Two skills compound. First, protection engineering depth: relay logic, coordination studies and the ability to argue a settings change, not just load a file. Second, digital substation work, including IEC 61850 configuration, networking and the test software that comes with it. Technicians who can read both a schematic and a config file are the ones utilities keep.
If you are weighing nearby options, three roles share much of the same ground: Electrical and Electronics Repairers, Commercial and Industrial Equipment, Electric Motor, Power Tool, and Related Repairers, and Electrical Power-Line Installers and Repairers. You can put any two side by side on our compare tool, browse the rest of the electrical equipment repair family, or see where hands-on roles sit on our list of jobs that mostly need a person.