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 |