400 Hz Ground Power Units

Leroy-Somer provides a complete range of 400 Hz alternators that have been optimized for integration in airports Ground Power Units. Sporting superior reliability and performance, Leroy-Somer 400 Hz alternators are the solution for powering grounded aircrafts.

Leroy-Somer produces 400 Hz alternators for reliable ground support power needs. These alternators are brushless, self-excited generators (Shunt excitation) that have high levels of performance. They meet most international standards, including IEC 34.1 and UTE (NFC 15-111, 105, 110…).

We can provide customization for special application machines upon direct request to suit your Ground Power needs for aircrafts. You can also contact us for Converter sets 50/400 Hz and double alternators 400 Hz + 28V DC with market-leading efficiency. Our 400 Hz range is specifically designed to supply electrical power to both military or civil aircraft and sustain outdoor weather conditions.

Electrical Features

• Voltages: 200V star / 115V delta, adjustable to ± 5 %
• Power factor between 0.8 and 1
• Transient voltage dip ≤ 10 % for 50 % load variation
• Harmonic rate < 2 %
• Recovery time ≤ 200 ms

Specifications

• Voltage accuracy ± 1 % on balance linear load
• Under speed protection
• Integrated radio interference suppressor

Mechanical features

• Two-bearing machine IM1001 (B34)
• Steel frame and cast-iron end shields
• Cylindrical and standardized shaft end
• Sealed-for-life bearings
• IP 21 Protection, self-ventilated alternator

Operating conditions

• Ambient temperature between - 20°C and + 50°C.