High Altitude GPU
2.Technology: Solid-State Static Frequency Converter with 12-Pulse Rectifier
3.Input: 3-Phase, 400V/480V, 50/60Hz (Wide Tolerance)
4.Output: 115V/200V, 400Hz, MIL-STD-704 Compliant
5.Applications: High-Altitude Airports (≥3000m), Mountainous Regions, Cold Climate Operations
6.Core Features: Derating Compensation, Cold-Start Capability, Enhanced Cooling, Ruggedized Enclosure
7.Brand: ACSOON (Altitude-Customized Configurations Available).
- Product Description
High Altitude GPU | 400Hz Ground Power for Mountain Airports & Cold Climates
XI'AN JERRYSTAR INSTRUMENT CO., LTD introduces the High Altitude GPU, specifically engineered to maintain full performance at elevations above 3000 meters and in extreme cold conditions. Standard electrical equipment can lose cooling efficiency and output capacity at high altitudes; this unit compensates with oversized cooling systems, robust component selection, and cold-start features. It ensures reliable 400Hz power for aircraft operations at challenging airports like Quito, La Paz, or Lhasa, where reliable ground support is critical.



Datasheet
| Parameter | Specification |
|---|---|
| Model Series | ACSOON GPU400L Series |
| Model Number | GPU400L-330090-HA |
| Input | 3-Phase 400V/480V ±15%, 50/60Hz |
| Output | Voltage: 115V/200V, 400Hz Power: 90kVA / 120kVA THD: <2% @ linear load |
| Altitude Rating | Full power up to 4000m |
| Operating Temp. | -30°C to 45°C |
| Cold Start | Integrated heaters, start down to -30°C |
| Compliance | MIL-STD-704F, ISO 6858 |
| Efficiency | ≥93% |
| Cooling | Oversized Forced Air |
| Control | VFD Display, Error Code Diagnostics |
| Protections | Over Voltage, Over Current, Short Circuit, Over Temperature |
| Enclosure | IP54, Corrosion-Resistant Coating |
| Dimensions (90kVA) | Length: 750mm, Width: 800mm, Height: 1495mm |

High Altitude GPU Main Features
- Altitude-Rated Cooling: Oversized fans and heat exchangers compensate for reduced air density.
- Integrated Preheat System: Internal heaters maintain critical components above freezing for instant start.
- Wide Input Tolerance: Accepts ±15% voltage variation, essential in unstable high-altitude grids.
- Comprehensive Diagnostics: Self-diagnostic system with fault logging for remote monitoring.

Why Choose ACSOON High Altitude GPU?
- Altitude Performance: Maintains full rated power at elevations up to 4000m with no derating, thanks to optimized cooling and component selection.
- Cold Climate Ready: Integrated heaters and low-temperature lubricants enable reliable start-up and operation down to -30°C.
- Enhanced Environmental Protection: IP54-rated enclosure with added corrosion resistance for mountainous, high-humidity environments.
- Proven Reliability: Built with high-altitude tested components, ensuring consistent performance in thin-air conditions.
High Altitude GPU Application Areas
- High-Altitude Airports: Serving airports located above 3000m (10,000 ft) such as El Alto International (La Paz), Quito, or Lhasa.
- Mountainous Regions: Supporting aviation operations in the Himalayas, Andes, and other high-elevation areas.
- Cold Climate Bases: Providing dependable ground power in Arctic, Antarctic, and northern winter conditions.
- Emergency & Military: Deployable units for high-altitude airstrips and forward operating bases.

Our Services

Quality Control
- Altitude Simulation Testing: Units tested in altitude chambers to verify cooling and output at 4000m equivalent.
- Cold Chamber Validation: Full cold-start cycles performed at -30°C to ensure reliable operation.
- Extended Burn-In: 48-hour continuous operation at rated load under simulated high-altitude conditions.
- Final Functional Audit: All protections, preheat circuits, and communication interfaces verified.
R&D Results
- Altitude Compensation Algorithm: Developed control software that adjusts fan speeds and protection thresholds based on ambient conditions.
- Low-Temperature Material Selection: Engineered using components rated for -40°C operation to ensure long-term reliability.
- Ruggedized Enclosure: Added corrosion-resistant coatings and sealed connectors for harsh mountain environments.
- Remote Monitoring Interface: Optional Ethernet/Modbus for integration into airport management systems.


Packaging and Transportation
- Heavy-Duty Export Crating: Unit secured in reinforced wooden crate with shock mounts.
- Climate-Controlled Shipping: Moisture barrier and desiccant for high-humidity transit.
- Complete Documentation: Altitude-specific installation guide, test reports, and compliance certificates.
- Global Logistics: Coordinated delivery to remote high-altitude airports with customs support.
After‑Sales Service
We offer a 24-month warranty, 24/7 technical support, on-site commissioning assistance, and guaranteed spare parts availability.

Qualification Certification
ISO 9001:2015 Certified manufacturing;CE Marked for European market;MIL-STD-704F Compliant for aircraft power;Factory Test Report with altitude performance data.


FAQ |
|---|
| Q1: Why do GPUs need special design for high altitude? |
| A: At high altitudes, air density decreases, reducing cooling efficiency. This can cause overheating and derating. Special oversized cooling and component selection maintain full power. |
| Q2: What is the maximum altitude this unit can operate at? |
| A: It is rated for full power operation up to 4000m (13,123 ft). For higher elevations, custom engineering is available. |
| Q3: How does it handle cold starts? |
| A: Internal thermostatically controlled heaters keep critical components above freezing. The unit can be started and operated reliably at temperatures down to -30°C. |
| Q4: Is it suitable for both narrow-body and wide-body aircraft? |
| A: Yes, with 90kVA and 120kVA models, it supports most commercial aircraft including A320, B737, A330, and B787 families. |
| Q5: What maintenance is required in high-altitude environments? |
| A: Regular cleaning of air filters is more critical due to dust and low air density. We provide a detailed maintenance schedule for altitude operations. |
Contact Us
For technical specifications or global solutions for the High Altitude GPU: acpower@acsoonpower.com, or submit your requirements using the form at the bottom of our website.












