AGL Isolating Transformers
Series-circuit isolating transformers that couple each light fixture to the primary circuit. Selection depends on circuit current, fixture load, frequency and the project specification.
A structured, application-based catalogue of Airfield Ground Lighting products and systems — mapped to ICAO Annex 14 and FAA AC 150/5340 designations wherever a recognised equivalent exists — to help airports, consultants, EPC contractors and maintenance teams identify, specify, test and support the right equipment.
A structured portfolio of airfield lighting, visual aids, series-circuit equipment and technical equipment. We help airports, consultants and contractors select, source, integrate, test and support the right products for each application.
The transformers and connectors that link each airfield light fixture to the series circuit are where selection, compatibility and installation quality matter most. We support airports, consultants and contractors in selecting, specifying, testing and sourcing these components, referenced to FAA L-830 (60 Hz) and L-831 (50 Hz) series isolating transformers (AC 150/5345-47C) and L-823 plug and receptacle connectors (AC 150/5345-26E), and relevant ICAO Annex 14 requirements.
Series-circuit isolating transformers that couple each light fixture to the primary circuit. Selection depends on circuit current, fixture load, frequency and the project specification.
Connector kits for the high-voltage primary series cable, used for circuit connections at transformers and cable joints. Cable type and circuit rating drive the correct kit.
Connection between the isolating transformer secondary and the fixture lead. Compatibility with the transformer, lead cable and fixture interface should be checked together.
An isolating transformer is tested against the project specification and its reference standard, FAA AC 150/5345-47C for L-830 (60 Hz) and L-831 (50 Hz) series isolating transformers. Testing covers electrical checks such as continuity and insulation resistance, with manufacturer test certificates as compliance evidence, and field verification once the transformer is installed in the series circuit. We support this as part of our AGL testing and inspection services. See L-830 Isolating Transformer, L-831 Isolating Transformer and the Technical Guide.
Our product portfolio is organised by aviation application instead of isolated part numbers, and mapped against ICAO Annex 14 and FAA AC 150/5340 designations wherever a recognised equivalent exists. This makes it easier to identify the lighting system, electrical infrastructure and technical tools required for a complete AGL installation.
Product pages should move beyond a photo and short description. Our technical format is designed around the information an airport engineer, consultant, procurement team or maintenance technician actually needs before selection.
Availability, exact configuration, certification / approval status and compliance depend on the selected manufacturer, product variant and project specification. Product information should therefore be verified against the latest approved datasheet and project requirements before procurement.
A quick-reference map between lighting function and the two designation systems most commonly seen on drawings, tenders and datasheets. Use it as an orientation aid — the applicable project specification always governs the exact type, colour and intensity selected.
| Function | ICAO Annex 14 designation | FAA equivalent (AC 150/5345 fixture types) |
|---|---|---|
| Runway edge light | Elevated / inset, white (yellow over the last 600 m or last third of the runway, whichever is less, on instrument runways) | L-850C (inset) / L-862 (elevated, high-intensity) or L-861 (elevated, medium-intensity) |
| Runway centreline | Inset, white / alternating red-white / red | L-850A (inset) |
| Runway threshold / end | Green (threshold) / red (end) | L-850D(L) (inset) / L-862E (elevated, high-intensity) or L-861E (elevated, medium-intensity) |
| Touchdown zone (TDZ) | White, paired barrettes | L-850B(L) (inset) |
| Taxiway centreline | Green (all) / alternating green-yellow near runway | L-852 series |
| Taxiway edge | Blue, omnidirectional | L-861T(L) (elevated) / L-852T(L) (inset) |
| Stop bar | Red, unidirectional, switchable | L-852S(L) (inset) / L-862S(L) (elevated) |
| Runway guard light | Alternating yellow, elevated / inset | L-804 (elevated) / L-852G(L) (inset) |
| Approach lighting system | SALS / MALS / precision approach configurations | ALSF-1 / ALSF-2 / MALSR / MALSF |
| Visual approach slope indicator | PAPI / APAPI | L-880 / L-881 |
| Airfield guidance sign | Mandatory / information / direction signs | L-858 |
| Obstacle / obstruction light | Low / medium / high intensity, Type A/B/C | L-810 (low, steady red) / L-864 and L-865 (medium) / L-856 and L-857 (high) |
| Series circuit isolating transformer | Series circuit transformer, per current rating | L-830 (60 Hz) / L-831 (50 Hz) |
| Primary connector / cable | Field connector kit, per circuit rating | L-823 / L-824 |
Designations are cited for general technical orientation only. ICAO and FAA numbering, colours and intensity classes evolve between document revisions — always confirm the current designation against the latest ICAO Annex 14 / Aerodrome Design Manual and FAA AC 150/5340 edition applicable to the project.
Share the airport, application, existing equipment, circuit details or tender specification. We can help identify the required product family, technical parameters, accessories and testing requirements.
The catalogue is organised by application into ten groups: runway lighting, taxiway and apron lighting, approach lighting, PAPI and accessories, airfield guidance signs and markers, AGL series circuit power and connectivity, wind and meteorological aids, obstruction and identification lighting, civil and field infrastructure, and spares, retrofit and replacement equipment.
Yes, wherever a recognised equivalent exists. The cross-reference table on the page links each lighting function to its ICAO Annex 14 designation and FAA fixture type, for example L-850C inset or L-862 and L-861 elevated for runway edge lights. It is an orientation aid only: the applicable project specification governs the exact type, colour and intensity, and the current ICAO Annex 14 and FAA AC 150/5340 editions should be confirmed.
L-830 is the FAA designation for 60 Hz series isolating transformers and L-831 is the 50 Hz version. Both are referenced to FAA AC 150/5345-47C. Selection depends on circuit current, fixture load, frequency and the project specification.
Primary connector kits are for the high-voltage primary series cable and are used for circuit connections at transformers and cable joints, with reference to FAA L-823 (AC 150/5345-26E). Secondary connector kits connect the isolating transformer secondary to the fixture lead. Transformer, lead cable and fixture interface should be checked for compatibility together.
An isolating transformer is tested against the project specification and its reference standard, FAA AC 150/5345-47C for L-830 and L-831. Testing covers electrical checks such as continuity and insulation resistance, with manufacturer test certificates as compliance evidence, and field verification once the transformer is installed in the series circuit. Precision AGL Solutions supports this as part of its AGL testing and inspection services.
Yes. The infrastructure group covers deep, shallow and inset bases, junction boxes and pits, handholes, frangible couplings, mounting and extension stems, base plates, cable ducts, cable protection, drainage and earthing accessories, marker posts and cable identification tags, so contractors can source the complete installation package.
These items are listed as available on request. They include LED retrofit modules, drivers and ballasts, replacement isolating transformers and connector kits, CCR cards and spares kits, sign components and LED boards, halogen-to-LED conversion kits and obsolete or legacy replacement units. The support route is to identify the installed equipment, verify photometric and circuit compatibility, and propose the replacement or upgrade.
Share the airport, the application, existing equipment, circuit details or the tender specification. That lets the required product family, technical parameters, accessories and testing requirements be identified.
No. Availability, exact configuration, certification or approval status and compliance depend on the selected manufacturer, product variant and project specification, so verify everything against the latest approved datasheet and project requirements before procurement.
For product selection, supply enquiries, specification support, testing, or technical consultation — contact Precision AGL Solutions.
Email UsStandards and editions referenced on this site are listed on the Standards Reference page.