28VDC & 400Hz GPU for Helicopters

1.Power Configuration: 28.5VDC (up to 600A) & 115V 400Hz AC (up to 20kVA) Combined Output
2.Technology: Solid-State Dual-Output Inverter/Rectifier with High-Frequency Switching
3.Input: 3-Phase, 208V-480V, 50/60Hz or optional integrated Diesel Generator
4.Output: Simultaneous 28VDC for systems start & 115V 400Hz AC for avionics

5.Key Applications: Civilian & Military Helicopters, General Aviation, Remote Helipads, Emergency Services
6.Core Features: Compact Towable Design, Rapid Deployment, MIL-STD-704 Compliant, Low Noise Operation
7.Brand: ACSOON (Configurable for Fixed-Wing Aircraft).

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Product Description

28VDC & 400Hz GPU for Helicopters | Dual-Output Ground Power Cart

XI'AN JERRYSTAR INSTRUMENT CO., LTD introduces the Portable 28VDC & 400Hz GPU for Helicopters, a versatile and compact ground power solution engineered for rotary-wing aircraft. This uniquely integrated unit provides both critical 28VDC for engine start and system checks and 115V 400Hz AC for cockpit avionics and instrumentation. Mounted on a maneuverable towable cart, it delivers reliable power in confined spaces at helipads, hangars, or remote operational sites.

Datasheet

Parameter	Specification
Model Series	ACSOON HGPU Combi Series
Input	Voltage: 3-Phase 208V, 400V, 480V ±15% Frequency: 50/60Hz Optional: Integrated Diesel Generator
DC Output	Voltage: 28.5VDC (20-32V adjustable) Current: 400A / 600A Continuous Ripple: ≤ 0.2V
AC Output	Voltage: 115V/200V, 400Hz Power: 15kVA / 20kVA Configuration: 3-Phase, 4-Wire THD: <2%
Cart Chassis	Towable design with pneumatic tires, parking brake, and lighting
Efficiency	≥90%
Display	Digital Meters for DC (V, A) and AC (V, A, Hz, kW)
Standards	MIL-STD-704 for AC & DC characteristics, GJB181A
Operating Temp.	-20°C to 50°C

28VDC & 400Hz GPU for Helicopters Main Features

Simultaneous Dual Output: Independent and stable 28VDC and 115V 400Hz AC outputs can be used at the same time.
Flexible Power Input: Can be powered from a standard 3-phase hangar supply or an optional onboard diesel generator for complete mobility.
Advanced Control Panel: User-friendly interface with dedicated meters and controls for both DC and AC sections, plus system diagnostics.
Comprehensive Safety Systems: Includes interlocks, over-voltage/current protection for both outputs, and secure cable storage with automatic reels.

Why Choose ACSOON 28VDC & 400Hz GPU for Helicopters?

Dual-Output Convenience: One compact unit replaces the need for separate DC and AC power sources, simplifying ground support logistics for helicopters.
Superior Portability: Lightweight, towable cart design with a tight turning radius allows easy positioning around aircraft in crowded hangars or on small helipads.
Helicopter-Optimized Power: Output ratings specifically tailored to meet the simultaneous DC and AC power demands of modern civilian and military helicopters.
Rugged and Reliable: Built to withstand harsh environments and frequent movement, with robust construction and components rated for continuous duty.

28VDC & 400Hz GPU for Helicopters Application Areas

Helicopter Maintenance Hangars: Primary power source for servicing, testing, and pre-flight checks on a variety of helicopter models.
EMS & Air Ambulance Bases: Ensuring immediate power availability for rapid turnaround of emergency medical service helicopters.
Offshore Oil Rig Helidecks: Providing essential ground power for helicopters supporting offshore operations.
Military Forward Operating Bases: Deployable power support for utility, attack, and transport helicopters in field conditions.

Our Services

Quality Control

Dual-Circuit Validation: Both the DC rectifier and AC inverter power stages undergo individual full-load and overload testing prior to integration.
Integrated System Burn-In: The complete unit operates under a combined simultaneous load profile for an extended period to ensure stability and thermal performance.
Vibration & Transit Testing: The assembled cart undergoes simulation to verify that all components remain secure and operational after transportation over rough terrain.
Final Functional & Safety Sign-off: All operator controls, safety interlocks, protection circuits, and emergency stops are rigorously tested and documented.

R&D Results

Compact Power Density: Achieved through a custom, shared cooling system and optimized component layout to fit dual power converters into a minimal footprint.
Intelligent Load Management: Developed control logic to prioritize and manage power distribution between the DC and AC outputs under high-demand scenarios.
Enhanced Environmental Sealing: Implemented improved gasketing and sealing techniques for the enclosure to achieve a high IP rating against dust and moisture.
Ergonomic Human-Machine Interface (HMI): Designed a single, intuitive control panel that clearly displays the status and controls for both power systems without confusion.

Packaging and Transportation

Ready-to-Operate Shipping: The unit is shipped fully assembled, tested, and fueled (if generator-equipped), requiring only minimal setup upon arrival.
Secure Transit Fixing: The cart is professionally secured to a shipping pallet or within a container using heavy-duty straps and blocking to prevent any movement.
Complete Documentation Dossier: Includes operator manuals, maintenance guides, parts lists, wiring diagrams, and international compliance certificates.
Door-to-Door Logistics Service: We manage the entire shipping process, including export paperwork, customs clearance, and final delivery to your site.

After‑Sales Service

We offer a comprehensive 24-month warranty on the power conversion modules and a 12-month warranty on the cart and generator. Our global support includes remote troubleshooting, on-site technician dispatch, and an efficient spare parts supply chain.

Qualification Certification

Aircraft Standard Compliance: Engineered to meet the environmental and performance requirements of MIL-STD-704 for aircraft electrical power;Quality Management System: Manufactured in an ISO 9001:2015 certified facility, ensuring process control and traceability;Emission Standards (if equipped): Optional generators comply with relevant EPA Tier or EU Stage emission regulations;Full Test Documentation: Each unit is delivered with a detailed Factory Acceptance Test (FAT) report.

FAQ
Q1: Can this GPU power both a helicopter's DC systems and its AC avionics at the same time?
A: Yes, that is its primary design purpose. It provides independent, simultaneous 28VDC and 115V 400Hz AC outputs, allowing technicians to energize all aircraft systems from a single point.
Q2: Is special training needed to operate it?
A: Basic familiarization is recommended. The control panel is designed for clarity, and comprehensive manuals are provided. We also offer optional on-site operator training.
Q3: How is it different from a standard fixed GPU?
A: Its key advantages are portability (towable cart) and dual-output capability in one unit. Fixed GPUs are typically stationary and often provide only AC or only DC power.
Q4: What if there is no electrical power available at the operating site?
A: You can specify the unit with an integrated diesel generator option. This makes it completely self-contained and capable of operating anywhere, independent of the local electrical grid.
Q5: What types of helicopters is it suitable for?
A: It is suitable for a wide range of medium to heavy helicopters in both civilian (EMS, offshore transport, utility) and military sectors that utilize 28VDC and 115V 400Hz AC power systems.

Contact Us

For technical specifications or global solutions for the 28VDC & 400Hz GPU for Helicopters: acpower@acsoonpower.com, or submit your requirements using the form at the bottom of our website.