Relay Technician

Since 1926, Electrical District No. 3 has been providing energy needs across Maricopa, Stanfield, and our vibrant agricultural communities. As a trusted public power utility with deep local roots, we’re experiencing exciting growth—and creating exceptional career opportunities.

Why choose ED3? Our comprehensive benefits package is just the beginning. When you join our team, you’ll become part of a forward-thinking organization committed to powering our community’s future while investing in our employees’ success.

Explore our current openings and discover how your talents can shine at ED3.

• Type:
  Full Time
• Salary/Pay Rate: $32.18 to $60.00 per hour
• Posted Date: 06/24/2026 3:26 p.m.

The following duties are normal for this position. The omission of specific duties does not exclude them from the classification if the work is similar, related or a logical assignment for this position. Other duties may be required, assigned, and expected commensurate with the needs of the District. Each employee is responsible for their own safety and the safety of others in the workplace.

Under the direction of the Technical Services Manager, the Relay Technician is responsible for the installation, testing, calibration, maintenance, troubleshooting, and commissioning of protective relays and associated protection and control systems throughout the District’s electrical system. The Relay Technician ensures the reliable operation of substations, transmission, and distribution protection schemes while supporting system reliability, safety, and regulatory compliance.

Responsibilities for this position include but are not limited to:

• Conduct routine preventive maintenance and testing of electromechanical, solid-state, and microprocessor-based protective relays.
• Perform functional testing, end-to-end testing, trip testing, and commissioning checks for protective relays, breakers, control circuits, and associated protection systems.
• Maintain protection system databases, relay settings files, test records, and equipment maintenance histories.
• Download, upload, document, and verify relay settings in accordance with approved engineering settings and District procedures.
• Work closely with Engineering staff to review protection schemes and improve system reliability and coordination.
• Assist with the installation, operation, maintenance, and troubleshooting of SCADA systems, RTUs, communications equipment, fiber optic systems, and substation automation equipment.
• Test and troubleshoot control wiring, DC circuits, breaker control circuits, lockout relays, alarms, annunciation, metering, and protection-related communications.
• Support Substation Technicians and line crews during system upgrades, outages, troubleshooting efforts, and emergency restoration activities.
• Review electrical drawings, one-line diagrams, protection schematics, control wiring diagrams, and construction plans.
• Redline drawings and provide accurate field markups for as-built records following construction, testing, or troubleshooting activities.
• Provide technical expertise regarding relay protection, coordination studies, and fault investigations.
• Assist with arc flash studies, protection coordination studies, and system reliability initiatives.
• Analyze relay targets, sequence-of-events records, oscillography, fault records, and disturbance data to support outage investigations and corrective actions.
• Respond to outages and emergency situations as required.
• Maintain a clean and safe work environment, including all Engineering Services facilities.
• Operate District vehicles, tools, test equipment, and electronic devices in a safe and responsible manner.
• Uphold the District Core Values:
  Safety, Integrity, Professionalism, Teamwork, and Respect.
• Perform all other duties as assigned.

Extensive knowledge of protective relay principles and power system protection practices.

Knowledge of transmission, distribution, and substation protection schemes.

Ability to read and interpret one-line diagrams, protection schematics, wiring diagrams, and construction drawings.

Knowledge of AC and DC control systems, batteries, chargers, communications…