Aircraft Hanger Facility Power Supply

The Aircraft Hangar Facility Power Supply is a specialized system designed to deliver reliable and efficient electrical power to support various operations within aircraft hangars. This system ensures that all electrical requirements, from aircraft maintenance equipment to lighting and safety systems, are met in compliance with stringent aviation standards and regulations.​

Technical Details:

1. Electrical Power Specifications:

   • Voltage and Frequency: Aircraft hangar power supplies typically provide 115/200 volts AC at 400 Hz for aircraft systems, aligning with MIL-STD-704 standards. Additionally, standard 60 Hz power at various voltages (e.g., 120V, 208V, 240V) is supplied for general facility operations.​

   • Ground Power Units (GPUs): These units supply necessary power to aircraft during ground operations, ensuring onboard systems remain operational without relying on the aircraft's auxiliary power unit (APU). GPUs can be powered by diesel, gas, electricity, or batteries, each suited to specific applications. ​

2. Distribution Systems:

   • Underground Pits and Pop-ups: To maintain a clutter-free environment and reduce hazards, power distribution networks often utilize underground pits and pop-up systems. These house cables and hoses, providing easy access when needed and retracting when not in use. ​

   • Flight Line Electrical Distribution Systems (FLEDS): These systems distribute 400 Hz, 60 Hz, and DC power efficiently across the hangar, ensuring all equipment receives the appropriate power type. ​

3. Safety and Compliance:

   • Fire Suppression Systems: Given the significant value of aircraft and the potential hazards within hangars, sophisticated fire protection systems are essential. These systems are designed to control and extinguish Class A or B fires, protecting both the facility and the aircraft. ​

   • Hazardous Area Classifications: Specific zones within hangars, especially areas five feet horizontally from the aircraft power plant or fuel tanks, are designated as Class 1 Division 2 hazardous areas. Electrical installations in these zones must comply with stringent standards to prevent ignition sources.

4. Grounding Requirements:

   • Aircraft Grounding: To protect against lightning discharge, provide current return paths, and prevent static charge accumulation, aircraft parked in hangars should be electrically grounded. This involves connecting the aircraft structure to a low-resistance ground. ​

5. Emergency Power Systems:

   • Backup Generators and UPS: To ensure continuous operation during power outages, hangars are equipped with emergency power systems, including standby generators and uninterruptible power supplies (UPS). These systems support critical operations, such as lighting, security systems, and essential maintenance equipment. 

6. Environmental Controls:

   • HVAC Systems: Maintaining optimal environmental conditions is crucial for both personnel comfort and equipment functionality. Heating, ventilation, and air conditioning (HVAC) systems are integrated into the power supply infrastructure to regulate temperature and air quality within the hangar.​

Applications:

• Aircraft Maintenance and Servicing: Provides power for tools, equipment, and systems used in routine maintenance, inspections, and repairs.​

• Pre-Flight Preparations: Supplies necessary power to aircraft systems during ground checks and avionics testing before flight.​

• Safety and Security: Ensures operation of fire suppression systems, emergency lighting, and security monitoring equipment.​

• Environmental Management: Supports HVAC systems to maintain controlled environments for sensitive equipment and comfortable working conditions.​

Technical Specifications Table:

Implementing a comprehensive and compliant power supply system in aircraft hangar facilities is essential for safe, efficient, and uninterrupted operations. Such systems ensure that all electrical needs are met, supporting maintenance activities, safeguarding personnel and equipment, and maintaining optimal environmental conditions within the hangar.