Tronair 112850D0100 – Dual-Output 28V DC Aircraft GPU – 50 Hz
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The Tronair 112850D0100 is a 28V DC aircraft rectifier/ground power unit (GPU) that provides DC ground power to the aircraft while in the hangar or on the ramp. These units operate on a 3-phase input voltage (50 Hz), and this model is a dual output unit with two aircraft connector cables.
This unit has a 50-ft. (12.2 m) input power cable for the hangar.
Standard Features
- Under 52 dB during normal operation, 60 dB maximum
- Clean power, low voltage ripple <.2 V DC RMS
- 15A, 220V AC, duplex GFCI 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 Lengths
- 20-ft. (6.1 m) and 50-ft. (15.2 m) output cable with AN2551 aircraft DC connector (NOTE: 50-ft. cable NOT used for starting engines)
- 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: 2000 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
| Specifications | |
|---|---|
| Height | 33" (84 cm) |
| Input | 60 Hz |
| Input Cable | 50 ft. (15.2 cm) |
| Length | 42" (107 cm) |
| Output Cable | Dual |
| Voltage | 208V to 415V |
| Weight | 750 lbs. (340 kg) |
| Width | 33" (84 cm) |
| Alternate Models | |
|---|---|
| 112850D0200 | Alternative PN - 100' AC Input Cable |
| General Information | |
|---|---|
| Part # | 112850D0100 |
| Manufacturer | Tronair |
| Shipping Information | |
|---|---|
| Product Weight | 840 lbs. |
| Product Dimensions | 63 x 48 x 44 in. |
| Freight NMFC | 61700 |
| Schedule B | 8504404000 |
| ECCN | EAR99 |
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AIRCRAFT COMPATIBILITY
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QUESTIONS & ANSWERS
With two independent 28V DC outputs, the Tronair 112850D0100 allows ground crews to power multiple systems at once or connect to two aircraft simultaneously. This is especially useful in busy service environments, where efficiency and time savings are critical. The dual outputs ensure flexible operation while maintaining safe, regulated current for each connection.
Yes, this unit is built for rugged environments and includes an industrial-grade powder-coated aluminum chassis that resists corrosion and damage from the elements. Its sealed electronic components and heavy-duty wheels make it suitable for both hangar and outdoor ramp use, even in harsh conditions.
Absolutely! The 112850D0100 includes multiple built-in protections, such as overvoltage, overcurrent, and short-circuit safeguards. These help prevent accidental damage to sensitive aircraft electrical systems during power delivery, giving technicians peace of mind when working on high-value equipment.
Yes, mobility is a key design feature of this GPU. It’s equipped with a durable tow handle and large, pneumatic tires for easy movement across uneven surfaces. Its compact footprint and balanced frame allow one person to maneuver it without difficulty.
Each output is equipped with a standard MS3509-style 3-pin connector, which is widely used in aviation ground power applications. These connectors ensure secure attachment and compatibility with most aircraft requiring 28V DC ground service.
The unit uses solid-state regulation to maintain a consistent voltage output even under varying loads. The voltage regulation is within ±0.5%, ensuring dependable and precise power delivery for avionics and onboard systems.
Thanks to its solid-state circuitry and industrial-grade components, the Tronair 112850D0100 is designed for minimal maintenance. Routine visual inspections, occasional filter cleaning, and cable checks are generally all that’s needed to keep the unit in optimal working condition.
Yes, the unit delivers clean, regulated DC power with low ripple, making it safe for powering onboard avionics during ground tests or software updates. This helps reduce battery usage and ensures stable operation for diagnostic or configuration tasks.
