HYBRID DIESEL POWER UNIT

Combine Diesel Ground Power Unit  is designed to supply all type of aircraft and helicopter during preflight maintenance at the airport. DGPU consists of a 50 Hz diesel generator set, 400 Hz frequency converter and 28 VDC rectifier. DGPU allows supplying any types of loads with alternating voltage 3×400 / 230 V with a frequency of 50 Hz, alternating voltage 3×200 / 115 V with a frequency of 400 Hz and a constant voltage of 28 VDC.

Combine Diesel Ground Power Unit has the ability to work in two power modes:
–  Self-powered mode: supply from internal diesel generator set
–  Hybrid (static) mode: supply from an external power source 3x400V, 50Hz

Main characteristics:

  • Smart operational TFT display
  • Full diagnostic turn-up test
  • Energy consumption metering system
  • Modularity
  • Maximum individual protection
  • Innovative design
  • Easy operation and maintenance
  • Total harmonic content not more 3.0 %
  • Outgoing 400 Hz 3 phase sinusoidal voltage high quality
  • High efficiency factor
  • Possibility of modification/adjustment in accordance to the Customer’s needs
  • Energy consumption low level

Technical characteristics:

Output parameters (AC):  
Rated output power, kVA 30-180
Rated output voltage phase/line, V 3 x 115/200
Output voltage frequency, Hz 400 ± 0,001%
Output voltage regulation accuracy, %:  
– for balanced load ± 0,5
– for 30 % unbalanced load ± 0,5
Total harmonic content THDU, %  
– linear load ≤2
– nonlinear load ≤2
Phase symmetry, electrical degree:  
– for balanced load 120 ± 1
– for 30 % unbalanced load 120 ± 1
Crest factor 1,414 ± 0,04%
Permissible overload, %:  
– within 600 s 150
– within 2 s 400
Output parameters (AC):  
Rated output power, V 28,0
Rated output current, A 400-1200
Current overload,2s , A ≤2500
Quantity of outputs 1
Input parameters for static work mode:  
Supply main rated voltage, V 3×400 (380)
Supply main voltage permitted deviation, % ± 15
Supply nominal frequency, Hz 50/60
Supply main rated frequency deviation, Hz ± 10
Power factor at 100 % load 1
Line Current Distortion at nominal load THDI, % ≤5
Overall efficiency at nominal conditions, % ≥96
Power interruption up to 25 ms
Starting current No, soft start
Engine technical data:  
Manufacturer Caterpillar (or any)
Cycle 4 Stroke
Induction Turbochanged
Governing Class ISO8528 G2
Fuel Tank, L 350
Fuel Consumptions, at 100% load 10 hours
Generator:  
Number of Bearing 1
Insulation Class H
Wires 3P+N
Radio Interference Supression is in line
with European
Standard EN61000-6
Miscellaneous:  
Overall dimensions  W x H x D, mm 3300 x 1760 x 1800
Weight, kg ≤3000
Ingress protection (converter module) IP55
Maximum ambient temperature, ºС plus 56
Minimal ambient temperature, ºС minus 50
Audible noise, 1m at static mode 55dBA
Relative humidity, % 30 to 80