Tronair 112850S0100 – Single-Output 28.5V DC Aircraft GPU – 50 Hz
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The Tronair 112850S0100 is a single-output aircraft ground power unit (GPU) that provides 28V DC ground power to aircraft while in the hangar or on the ramp. This unit has a 50 feet / 12.2 meter hangar input power cable.
This model operates only on a 50 Hz input voltage. If you need a 60 Hz input voltage unit, please order 112860S0100 or contact us for the 60 Hz unit.
Standard Features
- Under 52dB during normal operation, 60dB maximum
- Clean power, low voltage ripple <.2 VDC RMS
- 15 A, 115 VAC, duplex GFIC weatherproof receptacle with cover on 50 Hz Models
- MIL-STD-704F and 18" NEC compliant
- Energy-saving thermal control cooling fan
- Low profile fits under most wings
- Sturdy, all-weather IP54 enclosure with cord hangers
- Long-life LED indicator lights that double as a diagnostic tool
- Main disconnect switch
- DC On/Off switch
- Emergency stop switch
- Large 9" (23 cm) rubber ridgid and lockable swivel casters for easy maneuverability
- Adjustable current limit output
- Simple to use
- Easy-to-change multi-volt transformer
- CE marked
- Durable powder-coat finish (Tronair Blue)
- Two-year Tronair Platinum warranty
Cable Length
- 20-ft. (6.1 m) output cable with AN2551 aircraft DC connector
- 50-ft. (12.2 m) input cable electric plug not included on the input cable
Input Voltage
- Voltage Range: 200V to 480V +/- 10%+/- 10%
- Power: 25 kVA
- Phase: 3-Phase
- Frequency: 50 Hz
Output
- Voltage: 28.5V DC
- Current Limit (Adjustable): 100 to 2,000 max. amps DC
- Continuous Power: 600 amps at 28.5V DC
- Starting Power: 2,000 amps
Protection
- Output over/undervoltage
- Output overcurrent
- Input phase loss detection, missing phase
- Input over/undervoltage
- Input circuit breaker –100 amps
- Transformer over-temperature
- SCR over-temperature
Thermal Protection
- Cooling fan temperature controlled variable speed
Technical Specifications
- Input Cable: 50 ft. (15.2 m)
- Input: 50 Hz
- Output Cable: Single
- Voltage: 200V to 415V
- Dimensions: 33" H x 42" L x 31" W (84 x 107 x 79 cm)
- Weight: 702 lbs. (318 kg)
| Alternate Models | |
|---|---|
| 112850D0000 | 50Hz, 28.5V Dual Output, No Cable (CE) |
| 112850D0100 | 50Hz, 28.5V Dual Output, 50' Cable (CE) |
| 112850D0200 | 50Hz, 28.5V Dual Output, 100' Cable (CE) |
| 112850S0000 | 50Hz, 28.5V Single Output, No Cable (CE) |
| 112850S0200 | 50Hz, 28.5V Single Output, 100' Cable (CE) |
| 6130015783140 | National Stocking Number (NSN) |
| General Information | |
|---|---|
| Part # | 112850S0100 |
| Manufacturer | Tronair |
| NSN | 6130015783140 |
| Manual 1 | View 112850S0100 User Manual |
| Warranty | |
|---|---|
| Details | 2 Year Limited Tronair Platinum Warranty |
| Shipping Information | |
|---|---|
| Shipping Weight | 950 lbs. |
| Shipping Dimensions | 63 x 48 x 45 in. |
| Freight NMFC | 61700 |
| Schedule B | 8504409540 |
| ECCN | EAR99 |
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AIRCRAFT COMPATIBILITY
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QUESTIONS & ANSWERS
Yes, this GPU is ideal for aircraft with sensitive avionics and electronics. It delivers tightly regulated 28.5V DC output with minimal ripple, ensuring stable voltage for powering systems during maintenance, software loading, or preflight checks. This helps prevent damage caused by voltage fluctuations.
This unit is designed for general aviation, business jets, turboprops, and smaller commercial or military aircraft that operate on a 28V DC electrical system. It supports aircraft that require continuous DC power on the ground without relying on the onboard battery or APU.
Yes, the compact footprint and rugged construction make it suitable for indoor use in maintenance hangars. The enclosed design helps protect internal components from dust and debris, while its low-noise operation supports a clean and safe workspace for technicians.
The unit includes multiple built-in safety features such as overload protection, short-circuit protection, and thermal monitoring. These safeguards help protect both the GPU and the aircraft’s onboard systems during operation, reducing the risk of equipment damage or power-related incidents.
This GPU is housed in a compact and transportable cabinet designed for stationary use. While it is not a towable cart-style unit, it can be integrated into hangar power setups or mounted near aircraft service bays where consistent DC power is needed.
The 50 Hz specification refers to the frequency of the required input power. This unit is designed for countries or regions where the standard electrical frequency is 50 Hz, such as Europe, parts of Asia, and Africa. It is not intended for 60 Hz systems used in North America.
The 112850S0100 GPU typically uses aviation-standard DC connectors such as the MS3509 or equivalent NATO style, depending on configuration. These connectors ensure a secure and proper electrical interface with aircraft DC power receptacles.
This ground power unit enables maintenance crews to run aircraft systems continuously without depleting onboard batteries. It supports procedures like avionics updates, lighting tests, and hydraulic system checks, making it a vital tool in any aircraft maintenance environment.
Yes, it can assist with charging aircraft batteries by supplying a regulated DC voltage directly to the aircraft’s electrical system. However, charging protocols should be followed per the aircraft manufacturer’s recommendations to avoid overcharging or damaging the battery.
This unit is designed for low maintenance, with durable electronics and cooling systems that support long service intervals. Basic upkeep includes visual inspection, occasional cleaning of vents or filters, and monitoring for electrical integrity.
A dedicated DC unit like the 112850S0100 is more efficient and compact for aircraft that only require 28V power. It eliminates the complexity and added cost of multi-output systems when AC power is not needed, making it ideal for focused aviation servicing.
