# Tasks & work activities — electrical transmission system operator

Source: O*NET 30.3, occupation 49-2095.00 (Electrical and Electronics Repairers, Powerhouse, Substation, and Relay).

## Task statements

- **[Core]** Inspect and test equipment and circuits to identify malfunctions or defects, using wiring diagrams and testing devices such as ohmmeters, voltmeters, or ammeters.
- **[Core]** Consult manuals, schematics, wiring diagrams, and engineering personnel to troubleshoot and solve equipment problems and to determine optimum equipment functioning.
- **[Core]** Notify facility personnel of equipment shutdowns.
- **[Core]** Open and close switches to isolate defective relays, performing adjustments or repairs.
- **[Core]** Prepare and maintain records detailing tests, repairs, and maintenance.
- **[Core]** Analyze test data to diagnose malfunctions, to determine performance characteristics of systems, or to evaluate effects of system modifications.
- **[Core]** Repair, replace, and clean equipment and components such as circuit breakers, brushes, and commutators.
- **[Core]** Run signal quality and connectivity tests for individual cables, and record results.
- **[Core]** Maintain inventories of spare parts for all equipment, requisitioning parts as necessary.
- **[Supplemental]** Construct, test, maintain, and repair substation relay and control systems.
- **[Supplemental]** Test insulators and bushings of equipment by inducing voltage across insulation, testing current, and calculating insulation loss.
- **[Supplemental]** Disconnect voltage regulators, bolts, and screws, and connect replacement regulators to high-voltage lines.
- **[Supplemental]** Schedule and supervise the construction and testing of special devices and the implementation of unique monitoring or control systems.
- **[Supplemental]** Schedule and supervise splicing or termination of cables in color-code order.
- **[Supplemental]** Test oil in circuit breakers and transformers for dielectric strength, refilling oil periodically.

## Detailed work activities

- Analyze test or performance data to assess equipment operation.
- Clean equipment, parts, or tools to repair or maintain them in good working order.
- Confer with coworkers to coordinate work activities.
- Connect electrical components or equipment.
- Control power supply connections.
- Document operational activities.
- Document test results.
- Inspect equipment to locate or identify electrical problems.
- Maintain inventories of materials, equipment, or products.
- Maintain repair or maintenance records.
- Order materials, supplies, or equipment.
- Read technical information needed to perform maintenance or repairs.
- Repair electrical circuits or wiring.
- Repair electrical components.
- Repair electronic equipment.
- Schedule repair, installation or maintenance activities.
- Supervise employees.
- Test electrical circuits or components for proper functioning.
- Test electrical equipment or systems to ensure proper functioning.
- Test fluids to identify contamination or other problems.