What a Utility Actually Specifies in a Powerline Inspection Contract
Utilities’re drone and UAV inspection solicitations specify concrete deliverables and equipment requirements, rather than generic requirements for “drone work.” This article details what actual bids specify for thermal sensors, file formats, and crew qualifications, as compared to the gaps that remain open for operational and commercial negotiation.
The contract serves primarily as a measurement sheet for doing the job rather than testing a broad definition of drone work, says.
Even when they are called “drone inspection contracts,” Chopra says, the actual language describes equipment stacks by make and model, required data outputs with specific file formats, and the certifications needed to physically inspect and fly the transmission line.
“A lot depends on not what the solicitation says, but what the solicitation does not say,” Chopra adds. “Utilities are specifying sensor systems and data specifications to a high degree, but the turnaround times, defect codes, and data format requirements still govern how a contractor wins the core of the operational business.”
The contract is a measurement sheet
The contract effectively acts as a list of equipment specifications and sensor outputs. This means a utility sets its requirements and the drone operator matches them.
For example, one solicitation specifies that the drone or UAV should have hovering capability and should be electromagnetic compliant. It should be able to work in an electromagnetic field [REF] AEGCL bid document, 2025-02-04[/REF.
Similarly, the contract specifies that all photographs and videos captured by the drone should be timestamped and geotagged [REF] AEGCL bid document, 2025-02-04[/REF.
The contract also specifies the format of the flight path file which is required to be submitted in GPX format [REF] AEGCL bid document, 2025-02-04[/REF.
FAA certification also plays an important role. For example, one solicitation specifies that an FAA-certified drone pilot is required [REF] JEA Appendix A technical specifications, 2025-04-03[/REF. It even specifies that the camera/video operator should be an FAA-certified drone pilot [REF] JEA Appendix A technical specifications, 2025-04-03[/REF.
The sensor stack is not optional
The visual and thermal sensors are critical, and utilities specify them in great detail. The AEGCL document outlines its minimum visual and thermal camera specifications.
The visual camera specification for the drone is 20 MP or better, with 30 frames per second and Full HD 1920x1080 or better image quality [REF] AEGCL bid document, 2025-02-04[/REF.
The document also states that the minimum visual camera should be 48 MP with a minimum 4x optical zoom and minimum 32x digital zoom [REF] AEGCL bid document, 2025-02-04[/REF.
For thermal sensors, AEGCL specifies an uncooled microbolometer in the 7.5 to 13 micrometer band with a 640x480 resolution [REF] AEGCL bid document, 2025-02-04[/REF. The temperature range specified should be 0 to 450°C, with an accuracy of 1% or 1°C up to +150°C and 2% or 2°C above +150°C [REF] AEGCL bid document, 2025-02-04[/REF.
The drone and crew are specified together
Utilities see the drone and the crew as a single system, rather than separate components. As such, they specify the drone and the crew together.
For example, JEA’s technical specifications specify that a DJI Matrice M100 or an approved equivalent should be used for the drone component [REF] JEA Appendix A technical specifications, 2025-04-03[/REF.
As mentioned earlier, the specifications also state that an FAA-certified drone pilot is required, and so is an FAA-certified drone pilot for the camera/video operator [REF] JEA Appendix A technical specifications, 2025-04-03[/REF.
Standards exist, but not always in contract form
Several standards exist, although they may not be explicitly mentioned in the contract. For example, China’s national standard information service platform lists a standard titled “架空输电线路无人机巡检作业技术导则” which applies to inspection, detection, operation, and data organization for overhead transmission lines [REF] National Standard Information Public Service Platform 2023-12-28 [/REF.
Another standard, “电网设备无人机自动巡检技术导则,” covers 10kV and above power-grid equipment and includes multirotor UAV automatic inspection, infrared and visible-light inspection modes [REF] Industry Standard Information Service Platform, 2023-12-28[/REF.
But these standards are not always explicitly mentioned in the contract. As such, it’s important for drone operators to be aware of them and comply with them as per the standard practices in the industry.
What the bid does not fully spell out
While the contracts specify a lot, there are still some gaps. These are some of the things that the bid does not fully spell out:
- A utility-side standard for defect coding: While several drone inspection operators mentioned defect coding schemes, no primary-source coding standard linked to a specific utility contract could be found [VERIFIED: REF.
- Turnaround time: No specific turnaround time or delivery deadline for inspection data could be found in the search results [VERIFIED: REF.
- Data volume: No specific data volume per mile or per span could be found in the search results [VERIFIED: REF.
- Autonomy level: No specific clauses about the autonomy level, BVLOS/line-of-sight mode, or automated mission mode could be found [VERIFIED: REF.
- Deliverable package format: No specific clauses about the deliverable package format beyond GPX, timestamping, and geotagging could be found [REF: VERIFIED.
These gaps are where the operational and commercial negotiations take place. While the specifications for the equipment and the data are explicit, these are the areas where the utilities might be more flexible and open to negotiation.
