PXe-400F-DC Series Aircraft 400Hz and 28Vdc Avionics Ground Power Units | GPU
PXe-330000-400F-DC Series
The PX Electronics PXe-400F-DC Series combines regulated 115/200V three-phase AC power at 400Hz with a separately rated 28Vdc output in a single solid-state aircraft ground power unit. Designed for aircraft maintenance, MRO facilities, avionics testing and ground support operations, the system provides independent or simultaneous AC and DC power where specified, reducing the need for separate ground power equipment.
Technical Highlights for PXe-330000-400F-DC Series Aircraft Ground Power:
Solid-state conversion
Static converter design with no rotating machinery, rugged, high reliability, reducing running costs compared with generator-based systems
Three-phase power input
Operates from a 50Hz or 60Hz three-phase supply for aircraft-standard ground power output (single phase input is available on request)
Independent AC & DC Outputs
400Hz AC and DC power sections can be configured for independent operation, including 28Vdc and selected 270Vdc configurations, with both outputs available simultaneously where specified.
Line voltage drop compensation
Compensates for voltage drop across the aircraft output cable, helping maintain the required voltage at the aircraft connection point under load.
Control and protection
Digital monitoring, system status display, built-in protection against overload, short circuit, over-voltage and over-temperature conditions
Fixed or mobile options
Available in fixed, mobile or semi-mobile configurations, IP ratings to suit facilities, service bay or flight line requirements
Product Information
PXe-330000-400F-DC Configuration:
The PXe-330000-400F-DC Series provides protected 400Hz AC and DC aircraft power, configured to provide 400Hz AC alone or combined AC/DC outputs from a single solid-state system. DC configurations include 28Vdc for conventional aircraft and avionics ground power applications, with 270Vdc available for aircraft and test systems requiring a higher-voltage DC supply.
The AC and DC power sections operate independently, allowing each output to be controlled and monitored separately. Where specified, both outputs can operate simultaneously.
Systems operate from a three-phase 50Hz or 60Hz power input and can be specified based on the required aircraft load, output rating, installation format, and control method. Fixed, mobile, and semi-mobile configurations are available depending on the facility layout, service location, or flight line support requirements.
The static solid-state design uses no rotating machinery, helping reduce mechanical maintenance compared with generator-based systems. High-efficiency conversion, low total harmonic distortion and stable voltage and frequency regulation support reliable operation under changing aircraft load conditions.
Digital control and monitoring provide clear system status and operating information during use. Built-in protection functions respond to abnormal conditions, including overload, short circuits, and overheating.
For aviation maintenance environments, the system can be configured to support aircraft servicing, avionics workshops, MRO facilities, production lines, LRU testing and defence aviation support where combined 28Vdc and 400Hz AC ground power is required.
Popular Configurations:
The PXe-400F-DC Series is available in a range of combined 400Hz AC and 28Vdc aircraft ground power configurations. The examples below illustrate typical capacity combinations. AC and DC output ratings are specified independently to suit the required aircraft or test equipment loads.
Alternative capacities, input voltages, enclosure configurations and output connections are available on request.
The PXe-400F-DC Series combines three-phase 400Hz AC aircraft power with a separate 28Vdc output. The configurations below illustrate existing PX
specifications. Alternative AC and DC ratings, input supplies and enclosures are available following technical review.
| Model | 400Hz AC Output | 28Vdc Output | Input | Enclosure | Dimensions | Weight |
|---|---|---|---|---|---|---|
| PXe-331006-400F-DC | 5kVA 115/200V L-N/L-L Three-phase, 400Hz |
28Vdc / 35A Approx. 1kW |
380V L-L Three-phase, 50Hz |
IP22 | 430 x 600 x 700mm | 64kg |
| PXe-330030-400F-DC | 30kVA 115/200V L-N/L-L Three-phase, adjustable AC, 400Hz |
28Vdc / 600A continuous | 415V L-L Three-phase, 50Hz |
IP22 | 1100 x 900 x 1300mm | 360kg |
| PXe-330060-400F-DC | 60kVA 115/200V L-N/L-L Three-phase, 400Hz |
28Vdc Rated current to be confirmed |
380V L-L Three-phase, 50Hz |
IP54, mobile | 1000 x 700 x 1550mm | 460kg |
AC and DC output ratings are specified separately. Dimensions and weights relate to the example configurations and may vary with options.
Order Codes:
A product order code can be derived from the main ordering information using the structure below:
Generic order code is based on this format: PXe-330000-400F-DC, and all PXE order codes start with the six digits like 330100 in this case, indicating 3ph-input 3ph-output and 100kVA
For example a 3 phase in 50Hz, 3 phase out, 100kVA, 400Hz unit with 28Vdc = PXE-330100-400F-DC
PXE-330100-400F-DC-[INPUT]-[OUTPUT1]-[OUTPUT2]-[RATING]-[ENCLOSURE]-[CONTROL]
PXE-330100-400F-DC-[3P400V50]-[3P200V400]-[28VDC]-[100KVA]-[IP22]-[RS485]
This would represent:
(PXE-330100-400F-DC) – PX Electronics Ground Power Unit 100kVA
(3P400V50) – 3 phase, 400V (L-L), 50Hz input
(3P200V400) – 3 phase, 200V (L-L), 400Hz output 1
(28VDC) – 28Vdc output 2
(100KVA) – 100kVA rating
(IP22) – IP22 enclosure
(RS485) – Control
DC Output Selection: The OUTPUT2 field defines the required DC configuration. Typical selections include 28VDC and 270VDC, with the DC power/current rating confirmed separately for the required application.
For a manually controlled standard enclosure version, the part number may look like this:
PXe-330100-400F-DC-3P400V50-3P200V400-28VDC-100KVA-IP22-MC
| Model | Input | Output | Capacity | Enclosure | Interface Options |
|---|---|---|---|---|---|
|
PXe-330000-400F-DC Aircraft AC/DC Ground Power Unit |
3P400V50 Three Phase, |
3P200V400 Three Phase, 115V L-N/200V L-L, 400Hz 28VDC – DC Output, rating specified separately |
100KVA
AC output in this example, DC capacity confirmed separately |
IP22
standard enclosure |
MC
Manual Control Interface |
Available Options:
IP54-rated enclosure
Rugged enclosure option for outdoor, industrial, marine or aviation-related environments where additional protection is required against humidity, condensation, salt spray, water ingress and dust.
Conformal coating
Additional coating of internal PCBs and selected electronic components to improve protection in harsh, humid or corrosive environments.
19-inch rack mount construction
Available on smaller models where the AC power supply needs to be integrated into an existing rack, cabinet, laboratory bench system or production test area.
Remote watchdog monitoring
Typically offered on models above 50kVA. The watchdog system can provide real-time fault notification via SMS, data history logging, remote operation, and automatic restart functionality, subject to application and site requirements.
Cables and terminations
Input and output cable assemblies, connectors, and termination arrangements can be supplied to suit installation, load connection, and site operating requirements.
Mobile base and handling options
Wheeled bases, rubber castors, and swivel tow bars are available when the AC power supply needs to be moved between test areas, production lines, service bays, or operating locations. This option is suitable for facilities where flexible positioning and practical handling are important.
PXe-330000-400F-DC Series Technical Specification
| Capacity | |
| Single Phase Output (Other options available on request) |
kVA Ratings: 0.5kVA, 1kVA, 3kVA, 5kVA, 10kVA, 15kVA, 20kVA, 30kVA, 50kVA, 60kVA, 75kVA, 100kVA, 150kVA, 200kVA |
| Three Phase Output (Other options available on request) |
kVA Ratings: 1kVA, 3kVA, 6kVA, 9kVA, 15kVA, 20kVA, 30kVA, 45kVA, 60kVA, 100kVA, 150kVA, 200kVA, 300kVA, 400kVA, 500kVA |
| Input | |
| Single Phase (Select One Individual Voltage) |
110V, 115V, 120V, 127V, 220V, 230V, 240V, 254V, 277V, 400V (±10%, Other options available) |
| Three Phase (Select One Individual Voltage) |
115V/200V (L-N/L-L), 120V/208V, 127V/220V, 220V/380V, 230V/400V, 240V/415V, 254V/440V, 277V/480V, 400V/690V (±10%, Other options available) 3 Phase 3 Wire or 3 Phase 4 Wire |
| Frequency | 50Hz or 60Hz nominal input. Alternative input frequencies, including 400Hz where supported, available on request |
| Power Factor | ≥ 0.8 (standard type) ≥ 0.9 (optional type, 12 or 18 pulse) |
| Output | |
| Single Phase | Fixed: 110V, 115V, 120V, 127V, 220V, 230V, 240V, 400V |
| Three Phase | 115V/200V AC (L-N/L-L), Alternative aircraft or test system voltages available on request |
| 28VDC Output Option | Regulated 28VDC aircraft power output. Adjustable DC output available on selected configurations. The DC rating is selected based on the required load current and application. |
| Combined AC / DC Operation | 400Hz AC and DC outputs operate independently and can be used simultaneously on suitably configured PXe-400F-DC systems.
AC and DC output power ratings are specified independently according to the required aircraft or test system load |
| Frequency | 400Hz |
| Voltage Accuracy | ≤ ±1% FS |
| Frequency Accuracy | ≤ ±0.1% FS |
| Total Harmonic Distortion | THD ≤ 3% @ linear load, pure sine wave output |
| Load Current Crest Factor Capability | 3:1 |
| Overload Capacity | 100% continuous <110% – 15 minutes, <125- 10 minutes, <150%- 1 minute, <200%- 5 seconds >200% output cut off (other variations available upon request) |
| Interface | RS232C std, RS485, GPIB, Ethernet (Optional) |
| Protection | Over-current, over-voltage, over-power, over-temp, short circuit, alarm and indicators |
| Enclosure IP Rating | IP22 (Standard), IP32, IP54 (Optional). Special enclosure options available |
| LCD Display | Frequency meter, Voltage meter, Current meter, Power meter, PF meter |
| Connectors | Hard-wire terminals, EN60309, MIL-STD, or client choice |
| Operating conditions | |
| Temperature | Operation: -10℃~55℃ Ambient: -10℃~45℃ |
| Noise | ≤ 65dB at 1 meter EN 55022, IEC1000-4 |
| Humidity | 10~90% non-condensing |
| Cooling | Variable speed fan, filtered air intake in base, exhaust at rear |
| Altitude | ≤ 1800m |
| Castors or Feet | 0.5-3kVA have rubber feet and lifting handles, 4kVA+ have castors with front brakes. A/Vs or feet optional |
| Reliability and Efficiency | |
| Mean Time Between Failure (MTBF) | 50,000Hrs |
| Mean Time To Restore (MTTR) | < 30 min |
| Overall Efficiency | ≥ 85% |
| Standards | |
| CE, GB50054-95, GB 50150-1991, GB 50150-2006, GB 50171-1992, GB/T 16935.5-2008, GB/T16935.4-2011 | |
| EN IEC61000-3-2, EN 61000-3-3, EN55032, EN55035, MIL-STD-1399, MIL-STD 461, MIL-STD704, STANAG 1008 | |
| For more information and support, please feel free to contact us | |
No matching FAQs found.
A 28Vdc/400Hz Ground Power Unit (GPU) supplies both regulated 28Vdc power and 115/200V AC 400Hz power from a standard three phase AC supply. It is commonly used for aircraft ground power, avionics testing, maintenance operations, and production line testing, where both DC and AC aircraft power are required.
Yes. The Ground Power Unit (GPU) is designed to provide simultaneous 28Vdc and 400Hz AC outputs, enabling multiple aircraft systems or test equipment to be powered simultaneously. This reduces the need for separate power units and improves operational convenience and efficiency.
The unit accepts a standard 50Hz or 60Hz power, depending on configuration. Input voltage and phase options can be specified to suit site requirements, including single-phase or three-phase supplies.
Yes. In addition to 28Vdc configurations, selected PXe-400F-DC systems can provide a regulated 270Vdc output alongside 400Hz AC power. The AC and DC power sections operate independently and can be configured for simultaneous operation. DC power and current ratings are selected according to the aircraft, avionics or test-system requirement.
Yes. The GPU uses advanced IGBT-based solid-state inverter technology and filters to deliver clean, low-distortion power with precise voltage and frequency control. This makes it suitable for sensitive avionics, aircraft electrical systems, and laboratory test environments.
The system includes input-side circuit breakers and fuses to provide isolation and protection against over-current and electrical faults. Built-in electronic protection also monitors for overload, short circuit, over-voltage and over-temperature conditions.
These protection features help safeguard the Ground Power Unit, its internal components and the connected aircraft or test equipment during operation.
The 28Vdc/400Hz Ground Power Unit (GPU) is available in both fixed and mobile configurations. This makes it suitable for use in aircraft workshops, MRO maintenance facilities, production areas, and flight line support where flexibility or portability is required.
Yes, a PXe GPU can be used in the rain or snow if it is ordered with the IP54 option. For ultimate reliability, the GPU is best stored in a dry hangar or sheltered area.
A Ground Power Unit uses solid-state power electronics and is much lighter and more compact than rotating machinery. The GPU provides greater control over output voltage and frequency, as well as precise control of V and A protection. Unlike rotary machines, there are no mechanical maintenance requirements
Ground Power Units (GPU) fault diagnostic systems work by monitoring voltage, current, and power, as well as phase loss. These errors are written to Non-Volatile RAM (NVRAM). SIL Watch-dog options are available for independent monitoring and reporting.
Watchdog or independent fault monitoring is physically outside the GPU, meaning it does not rely on the GPU for its auxiliary power, so it can monitor and report the health of Ground Power Units, particularly high-kVA units with critical loads. These autonomous fault-diagnostic systems monitor voltage, current, power, and phase loss. These error conditions are written to Non-Volatile RAM (NVRAM) and can also be sent via VPN, networks, and SMS.
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