Der Static Inverter wird am Gleichstromnetz oder der Batterie mit 28 V DC des Flugzeugs betrieben und versorgt die Bordsysteme mit einer Wechselspannung von 115 V AC bei einer Frequenz von 400 Hz wenn keine andere Wechselspannungsversorgung im Flugzeug vorhanden ist. Die Ausgangsspannung steht potenzialfrei zur Verfügung und wird im gesamten Lastbereich und bei unterschiedlichen Eingangsspannungen konstant ausgeregelt. Das Gerät ist für begrenzte Dauer überlastfähig und kurzschlußfest. Zwei eingebauter Lüfter sorgen für die Kühlung des Inverters über den gesamten zugelassenen Temperaturbereich. Die integrierte Überwachungselektronik überprüft die einwandfreie Funktion des Gerätes und stellt diese Statusinformation den angeschlossenen Systemen zur Verfügung.
| Technical Data | |
|---|---|
| Input: | |
| Nominal DC input voltage | 28 VDC |
| Operating DC input voltage | 17.0 to 32.5 VDC |
| Current consumption (at 2500 VA, nominal load) | approx. 108 Amp at 28 VDC |
| Permissible overvoltage | according ABD 0100 |
| Power interrupts | according ABD 0100 |
| Supply voltage transients | according ABD 0100 |
| Inrush current | < 650 Amp during 5 ms |
| Rejection on DC network (at source impedance 50 mOhm) | < 0.8 V peak to peak |
| Output: | |
| Normal AC output voltage | 115 VAC ± 5 V |
| Abnormal AC output voltage (17 V – 22 V DC in) | > 100 VAC |
| AC output frequency | 400 Hz ± 2 Hz |
| Number of phases | 1 phase |
| Nominal load | up to 2500 VA (linear loads 40%, 0.7 lag to 1 non linear loads 60%, crest factor =3) |
| Overload | 2750 VA for 30 minutes 3250 VA for 5 seconds 2000 VA: fan failed at 20°C / 24 VDC |
| Short circuit capacity | > 2 x Inominal for 10 sec. |
| Power up control | nominal output voltage less than 80 ms after DC on |
| Distortion factor | total harmonics < 5 % no harmonic greater than 3 % |
| Efficiency | > 0.81 at 24 VDC input voltage |
| Protection: | |
| Built-in-Test (discrete) for fan failure, overheat and output undervoltage | DC ground signal in case of failure |
| Built-in-Test (to relay) for overheat and output undervoltage | 28 VDC signal in case of failure |
| AC generation stop | at all failure protection except fan failure |
| Failure protection reset | with DC input power up |
| MTBF: | |
| Predicted MTBF | > 8500 operational hours |
| Mechanical Data: | |
| Dimensions (length x width x height) | 662 mm x 230 mm x 154 mm |
| Mass (weight) | 13.5 kg |
| Cooling | 2 internal fans |
| Pin assignments: | |
| 28 V pos. DC input | screw bolt 3/8-24 UNF |
| 28 V neg. DC input | screw bolt 5/16-24 UNF |
| Status signal LOGIC | ASNE 0052, Pin J1-A |
| Status signal RELAY | ASNE 0052, Pin J2-B |
| nc | ASNE 0052, Pin J2-C |
| 115 AC Output (neutral) | ASNE 0052, Pin J2-D |
| 115 AC Output (high) | ASNE 0052, Pin J2-E |
| Chassis ground | ASNE 0052, Pin J2-F |
| secondary +28VIN | ASNE 0052, Pin J2-G |
| nc | ASNE 0052, Pin J2-H |
| Environmental Conditions: | |
| Operating temperature (DO160C-sect. 4) | Cat. A2 (-15 °C to +70 °C) |
| Storage temperature (DO160C-sect. 4) | Cat. A2 (-55 °C to +85 °C) |
| Start-up low temperature | -55 °C |
| Altitude (DO160C-sect. 4) | Cat. A2 (15 000 ft) |
| Decompression (DO160C-sect. 4) | Cat. A2 (50 000 ft) |
| Overpressure (DO160C-sect. 4) | Cat. A2 (820 mbars) |
| Temperature variation (DO160C-sect. 5) | Cat. B (5 °C per minute) |
| Humidity (DO160C-sect. 6) | Cat. B |
| Operational shocks (DO160C-sect. 7) | 6 g / 11 ms |
| Crash safety shocks (DO160C-sect. 7) | 15 g / 11 ms impulse |
| Constant acceleration | applicable |
| Operational vibrations (DO160C-sect. 8) | Curve C |
| Sand and dust (DO160C-sect. 12) | Cat. D |
| Fungus (DO160C-sect. 13) | Cat. F |
| Salt spray (DO160C-sect. 14) | Cat. S |
| Magnetic effect (DO160C-sect. 15) | Cat. Z |
| Flammability/smoke/toxicity (ABD 0031) | applicable |
| Voltage spike (DO160C-sect. 17) | applicable |
| Audio freq. conducted susceptibility (sect. 18) | applicable |
| Induced signal suscept. (DO160C-sect. 19) | applicable |
| RF susceptibility (DO160C-sect. 20) | applicable |
| Emission of RF energy (DO160C-sect. 21) | applicable |
| Lightning induced transient suscept. (DO160C-sect. 22) | applicable |