AR in Grid Operations: How Utilities Use Augmented Reality for Maintenance (2026)

Electric utilities operate some of the most complex maintenance environments in the infrastructure world. A high-voltage substation contains dozens of switchgear panels, circuit breakers, protection relays, and busbar configurations, each with maintenance procedures requiring exact sequence adherence and precise equipment identification. Field technicians work across geographically dispersed assets - substations, distribution points, transformer banks, transmission lines - often without immediate access to specialist expertise when they encounter unexpected conditions. AR-connected worker platforms are changing both the accuracy and efficiency of grid maintenance by delivering step-by-step digital guidance at the point of work and connecting field technicians to remote experts without requiring either party to travel.

Utility AR adoption is accelerating for two reasons beyond the operational case. The first is workforce demographics: a significant proportion of experienced transmission and distribution technicians across the US and European utility sectors are within a decade of retirement, and the knowledge embedded in their field experience cannot be fully transferred through conventional training programs. AR-assisted operations extend the reach of senior expertise and accelerate practical competency development for newer technicians. The second driver is grid complexity: the integration of distributed solar, battery storage, and EV charging is creating power flow conditions that require more frequent and precise maintenance actions than the traditional grid demanded.

This guide examines how utilities are deploying AR for substation maintenance, live-line work, smart meter installation, transformer inspection, and digital twin-connected field operations, covering both the documented platforms in use and the practical safety and integration considerations that determine deployment success.

AR-Guided Substation Maintenance

Substations are among the most procedure-intensive maintenance environments utilities operate. Circuit breaker inspection, protection relay testing, busbar maintenance, and switching operations each involve multi-step sequences where skipping a step or misidentifying equipment can create dangerous equipment states. AR work instructions delivered through smart glasses overlay step-by-step guidance onto the technician's field of view, showing which terminal to test, which relay to isolate, and which switching sequence to follow, with each step confirmation locked until the previous step is complete. This sequential lock prevents the class of procedural errors that arise when a technician skips ahead or loses position in a long procedure.

The benefits extend to remote collaboration. When a field technician encounters an unexpected equipment condition - a corroded terminal, an unfamiliar protection relay configuration, or a discrepancy between the as-built drawing and actual equipment layout - AR remote assistance allows an engineer to view exactly what the field worker sees through the smart glasses camera, annotate the shared view with guidance markers, and provide real-time direction without traveling to the site. This reduces both the time to resolve the issue and the cost of deploying specialist engineers for routine maintenance support, which is particularly significant for utilities managing hundreds of substations across large geographic territories.

Smart Glasses for Live-Line Work: Safety Considerations at High Voltage

Smart glasses use near energized high-voltage equipment requires careful evaluation of both electrical safety factors and practical device performance. High-voltage electromagnetic fields can disrupt the Bluetooth and wireless connectivity that most smart glasses depend on for audio communication and data synchronization. Some device sensors including camera autofocus mechanisms and GPS can also be affected by the electromagnetic environment near energized transmission and distribution equipment. Before deploying smart glasses in or near energized switchyards or transmission infrastructure, utilities should test device performance in the specific electromagnetic environment of the target equipment rather than relying on manufacturer specifications developed in standard laboratory conditions.

The safety priority for live-line work is that AR must not introduce new risks while addressing existing ones. Smart glasses requiring frequent interaction through head movement commands or voice inputs can divert attention from maintaining minimum approach distances and monitoring the movement of colleagues near live equipment. The appropriate AR use cases for live-line environments are those where the device provides passive information delivery - displaying documentation, identifying equipment, surfacing clearance records - rather than demanding active interaction that competes with the safety-critical attention requirements of the task. Utilities that have deployed smart glasses for live-line support typically restrict AR use to safe working distance tasks, with the smart glasses used for reference and remote consultation rather than active step-by-step guidance during close-approach work.

Librestream and TeamViewer Frontline in Utility Operations

Librestream's Onsight platform is the most widely deployed connected worker solution in the global energy and utilities sector. Siemens Energy adopted Onsight as its enterprise-wide Connected Worker standard, giving Librestream validated scale in one of the world's largest electricity equipment manufacturers and service organizations. The platform combines smart glasses-based AR, mobile AR on tablets and phones, and remote expert video assistance in a single managed system. Field technicians connect to remote specialists who see exactly what the smart glasses camera captures and can annotate the shared view with guidance markers, overlay reference documentation, and call up relevant engineering drawings without either party leaving their location. The platform's multi-language support across 27 languages and deployment across 193 countries gives it operational reach that matches the geographic scope of major utility holding companies.

TeamViewer Frontline - the rebranded portfolio from the 2020 Ubimax acquisition - covers AR work instructions (xMake), structured inspection workflows (xInspect), and remote expert assistance (xAssist). In utility field service operations, Frontline has been deployed for field inspection, maintenance guidance, and back-office expert support for grid maintenance technicians. The xInspect capability adds structured inspection workflow management that captures results directly through the AR interface rather than requiring manual data entry after the fact. For utility operations where maintenance records must be created in real time and tied to specific equipment identifiers, this structured capture capability reduces the gap between field activity and the maintenance management system record that compliance and asset management programs require.

Smart Meter Installation with AR Work Instructions

Smart meter installation programs involve deploying meters across residential and commercial premises at scale, often using a large field workforce that includes contractors with varying levels of experience. The error modes most common in high-volume installation programs - incorrect meter seating, connection errors at non-standard configurations, missed steps in the commissioning sequence - are precisely the modes that AR work instructions address. Studies of AR-assisted meter deployment programs have documented error rate reductions of 15 to 30 percent compared to paper-based or tablet-based instruction equivalents, with the largest improvements for non-standard configurations where the technician must deviate from the default procedure and the risk of a missed step is highest.

The efficiency benefit compounds at scale. A reduction in installation errors across a large meter deployment program directly reduces the call-back visits that are expensive for both the utility and the installation contractor, with secondary costs including customer satisfaction impacts and regulatory reporting requirements for installation quality. Scope AR's WorkLink platform has been used for smart meter deployment AR instructions in utility programs, with documented error reduction outcomes. The platform's no-code work instruction authoring capability allows utility training and operations teams to create and update AR-guided installation procedures without developer resources, which matters for programs that span multiple meter types and configurations.

AR for Transformer Inspection

Transformer inspection is a high-frequency maintenance task at substations and distribution points, involving oil sampling, thermal imaging, bushing inspection, and nameplate verification across large numbers of units. AR assists transformer inspection in several practical ways. Nameplate data, maintenance history, and outstanding work orders can be overlaid on the transformer unit without requiring the technician to carry paper records or cross-reference a separate device. Thermal imaging results from a handheld imager can be compared against historical baselines pulled from the asset management system and displayed in the AR field of view, giving the technician an immediate assessment of whether observed temperatures are within normal operating bounds rather than requiring post-inspection office analysis.

Remote expert review of inspection findings becomes possible without the expert traveling to the site. The field technician shares the live camera view through the AR platform and the expert provides real-time assessment of whether observed conditions - oil discoloration, unusual surface temperatures, bushing anomalies - require immediate action or can be scheduled for future maintenance. For utilities managing transformer fleets across large territories, the ability to get senior engineering assessment of field findings in real time rather than scheduling a second visit with the expert reduces both resolution time and the cost of deploying specialist personnel for routine inspection support.

Digital Twin-Connected AR: Live Sensor Data Overlaid on Equipment

The most advanced AR applications in grid operations connect the field AR system directly to the grid digital twin or SCADA data layer, displaying live operational readings overlaid on physical equipment in real time. A technician standing at a transformer can see its current load, oil temperature, and recent alarm history without querying a separate system. A substation maintenance team preparing for a circuit breaker inspection can confirm current protection relay settings and recent fault records are consistent with the planned maintenance scope before starting work, with all data pulled from the live digital twin and displayed in their field of view.

Implementing digital twin-connected AR requires an integration layer connecting the AR platform to the underlying data sources - typically the energy management system, asset management system, or SCADA historian. Cognite Data Fusion and Bentley iTwin are the industrial digital twin platforms most commonly used to build this integration layer for utility AR applications. The data quality and completeness of the underlying twin is the binding constraint on how much value the AR overlay can provide: a twin with comprehensive sensor data, complete maintenance history, and current operational parameters enables rich and actionable overlays, while incomplete or stale data limits what can be meaningfully displayed at the point of work.

Utility Workforce Upskilling with AR

US and European utilities face a significant workforce transition over the next decade. A substantial proportion of experienced transmission and distribution technicians are within ten years of retirement, and the operational knowledge embedded in decades of field experience is difficult to transfer through formal training programs alone. AR-assisted operations address this challenge through two mechanisms. Remote collaboration tools allow experienced technicians to support less experienced colleagues in the field without requiring physical co-location, extending the reach of senior expertise and accelerating the practical competency development of newer workers who would otherwise wait months for opportunities to observe and assist on complex tasks.

AR work instructions codify expert knowledge into structured digital procedures that remain accessible to all technicians regardless of whether the original expert who authored them is still in the workforce. Utilities that have invested in AR-assisted operations report measurable reductions in the time required to bring new field technicians to operational independence, with the largest gains for complex tasks - protection relay testing, specialized switchgear maintenance - where the procedure is too long and nuanced to hold in memory without reference support. The AR instruction acts as a persistent expert guide that the technician can consult step by step without interrupting the workflow or requiring a supervisor to be physically present.

Frequently Asked Questions

How is AR being used in substation maintenance?

AR is used in substations in three primary ways. First, AR work instructions delivered through smart glasses guide technicians through complex multi-step procedures - circuit breaker inspection, protection relay testing, busbar maintenance - with sequential step confirmation that prevents skipped steps and equipment identification errors. Second, remote expert assistance via AR video allows field technicians to share exactly what they see through the smart glasses camera with an engineer or specialist who can annotate the shared view in real time and provide guidance without traveling to the substation. Third, in digital twin-connected deployments, AR overlays live operational data - current load, recent alarms, protection relay settings, maintenance history - on physical equipment, giving technicians contextual intelligence at the point of work. Together these applications reduce errors in complex maintenance sequences, accelerate anomaly resolution, and allow experienced engineers to support multiple field crews remotely rather than being present at each substation.

What are the safety risks of using smart glasses near high-voltage equipment?

Three categories of risk apply to smart glasses use near high-voltage equipment. First, electromagnetic interference: high-voltage electrical fields can disrupt the Bluetooth and wireless connectivity that smart glasses rely on for audio communication and data links, and can affect sensor systems including camera autofocus and GPS. Utilities should test device performance in the specific electromagnetic environment of target equipment before deployment rather than relying on standard manufacturer specifications. Second, attention diversion: smart glasses that require active interaction - head movement commands, voice inputs, screen-reading - can compete with the attention demands of live-line work, where maintaining minimum approach distances and monitoring colleague movements are safety-critical tasks. The appropriate AR use in live-line environments is passive information delivery, not active interactive guidance. Third, equipment compatibility: smart glasses add bulk and may affect the fit of safety helmets and face shields. PPE compatibility must be verified before deployment in protection-mandatory environments.

Which connected worker platforms are most widely deployed in utility field operations?

Librestream's Onsight platform is the most widely deployed connected worker solution in the global energy and utilities sector, with Siemens Energy's enterprise-wide adoption as its company-wide Connected Worker standard representing the largest single documented energy-sector deployment. TeamViewer Frontline (the rebranded Ubimax portfolio) is deployed across utility and energy field service operations for inspection workflow management and remote expert assistance. Honeywell Forge Worker Assist combines AR-guided work instructions with remote expert video assistance and holds the largest connected worker market share globally across industrial sectors. Scope AR's WorkLink has documented deployments in utility smart meter programs and field maintenance operations. For utilities evaluating platforms, the key differentiators are: integration capability with existing asset management systems and SCADA infrastructure, device compatibility with target AR hardware, and whether the platform has documented deployments in high-voltage utility environments specifically.

How does digital twin integration change what AR can show technicians in the field?

Without digital twin integration, AR overlays are static - work instructions, reference documentation, and equipment diagrams are pre-loaded content carried into the field. With digital twin integration, the AR overlay becomes live: the system queries the digital twin in real time and displays current operational parameters - transformer load, circuit breaker status, relay settings, recent alarm history, oil temperature readings - overlaid on the physical equipment as the technician looks at it. This turns AR from a documentation delivery tool into a real-time operational intelligence interface. The practical impact is significant: a technician can confirm equipment state before starting work without querying a separate system, compare readings against historical baselines shown in the overlay, and spot discrepancies between current state and expected state before they become maintenance errors. Bentley iTwin and Cognite Data Fusion are the digital twin platforms most commonly used to build this live data integration layer for utility AR applications.