Maintenance GPU

1.Power Rating: 90kVA / 120kVA (Three Phase 400Hz)
2.Technology: Solid-State Static Frequency Converter with 6-Pulse/12-Pulse
Rectifier
3.Input: 3-Phase, 400V/480V, 50/60Hz
4.Output: 115V/200V, 400Hz, MIL-STD-704 Compliant
5.Applications: Hangar Maintenance, Line Maintenance, Depot Repair, Aircraft Servicing
6.Core Features: High Reliability, Continuous Duty Rated, Low Harmonic Distortion, Easy Service Access
7.Brand: ACSOON (Fixed Pit or Free-Standing Configuration).

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Product Description

Maintenance GPU | 400Hz Ground Power Unit for Hangar & Line Maintenance

XI'AN JERRYSTAR INSTRUMENT CO., LTD introduces the robust Maintenance GPU, designed specifically for the demanding environment of aircraft hangars and maintenance facilities. This 400Hz ground power unit delivers clean, stable electrical power required for comprehensive aircraft servicing, troubleshooting, and repair operations. Built for continuous duty and easy serviceability, it ensures that maintenance crews have reliable power whenever and wherever they need it, minimizing aircraft downtime.

Datasheet

Parameter	Specification
Model Series	ACSOON GPU400 Series
Model Number	GPU400-330090 (90kVA) / GPU400-330120 (120kVA)
Input	3-Phase 400V/480V ±15%, 50/60Hz
Output	Voltage: 115V/200V, 400Hz Power: 90kVA / 120kVA THD: <2% @ linear load
Compliance	MIL-STD-704F, ISO 6858
Efficiency	≥93%
Overload Capacity	125% for 10 minutes, 150% for 60 seconds
Cooling	Forced Air (IP54 protected fans)
Display	VFD Digital (V, I, F, Fault Codes)
Enclosure	Free-standing Steel Cabinet, IP54 Rated
Dimensions (90kVA)	Length: 750mm, Width: 800mm, Height: 1495mm

Maintenance GPU Main Features

High Efficiency 12-Pulse Design: Reduces input harmonics and improves overall energy efficiency.
Wide Input Voltage Tolerance: Accepts ±15% variation, ensuring stable operation even with fluctuating hangar power.
Comprehensive Diagnostics: Built-in self-diagnostic system with VFD display showing voltage, current, frequency, and fault codes.
Heavy-Duty Enclosure: IP54-rated steel cabinet protects against dust and water spray.

Why Choose ACSOON Maintenance GPU?

Engineered for Continuous Duty: Designed for extended operation during lengthy maintenance tasks, with robust cooling and industrial-grade components.
Superior Power Quality: Delivers clean 400Hz power with <2% THD, protecting sensitive avionics and test equipment.
Easy Service Access: Front and side panels provide quick access to internal components, simplifying maintenance and reducing repair time.
Rugged & Reliable: Built to withstand the rigors of hangar environments, including dust, vibration, and occasional impacts.

Maintenance GPU Application Areas

Heavy Maintenance Hangars: Powering aircraft during C-checks, D-checks, and major modifications.
Line Maintenance Bays: Supporting overnight checks, component replacements, and routine servicing.
Avionics Test Shops: Providing stable 400Hz power for bench-testing avionics units removed from aircraft.
Paint & Interior Refurbishment: Powering lighting, tools, and environmental systems during cabin reconfiguration.

Our Services

Quality Control

Full-Power Burn-In: Each unit undergoes a 48-hour continuous test at 100% load to ensure reliability for maintenance operations.
Waveform Verification: Output purity and voltage accuracy are measured against MIL-STD-704F requirements.
Thermal Imaging Inspection: Critical components are scanned under load to verify proper cooling.
Final Functional Audit: All controls, displays, and protection circuits are thoroughly tested.

R&D Results

Enhanced Cooling for Extended Duty: Developed a dual-fan cooling system with automatic redundancy to ensure continuous operation during long maintenance shifts.
Service-Oriented Design: Engineered modular internal layout with color-coded wiring and labeled components for easy troubleshooting.
Diagnostic Intelligence: Created a fault-logging system that stores last 10 events with time stamps for maintenance planning.
Low-Noise Operation: Optimized fan control and acoustic damping for quieter hangar environment.

Packaging and Transportation

Hangar-Ready Crating: Unit is shipped in a heavy-duty wooden crate with forklift access and clear handling instructions.
Installation Kit Included: Contains all necessary mounting hardware, input/output cables, and detailed installation manual.
Complete Documentation: Pack includes test reports, compliance certificates, and spare parts list.
Global Logistics: Coordinated delivery to maintenance bases worldwide with customs clearance support.

After‑Sales Service

We offer a 24-month warranty, 24/7 technical support, on-site training for maintenance staff, and guaranteed availability of spare parts.

Qualification Certification

ISO 9001:2015 Certified manufacturing quality system；CE Marked for European market compliance；MIL-STD-704F Certified for aircraft ground power；Factory Acceptance Test Report provided with each unit.

FAQ
Q1: What makes a maintenance GPU different from a ramp GPU?
A: A Maintenance GPU is optimized for continuous, long-duration operation during hangar work, with enhanced serviceability, diagnostic features, and robust cooling. Ramp GPUs prioritize quick turnarounds and may have different duty cycles.
Q2: Can this unit be used for both narrow-body and wide-body aircraft?
A: Yes, with power ratings of 90kVA and 120kVA, it supports a wide range of aircraft types. For larger wide-body aircraft, we recommend the 120kVA model.
Q3: How do I access internal components for maintenance?
A: The cabinet features removable side panels and a hinged front door, providing easy access to all major components including IGBT modules, control boards, and cooling fans.
Q4: Is remote monitoring available for maintenance planning?
A: Yes, optional RS485/Modbus and Ethernet interfaces allow integration with hangar management systems for remote status monitoring and usage tracking.

Contact Us

For technical specifications or global solutions for the Maintenance GPU: acpower@acsoonpower.com, or submit your requirements using the form at the bottom of our website.