The Ground Power Units (GPU) are power supply units exclusively used in airport scope, as external auxiliary power source for aircrafts. As well as all the other similar equipments, they need periodic working test sessions, which can be performed by using appropriate devices, expressly designed for this singular and characteristic purpose.
General specifications
| Specification | Description |
| Rated voltage | 115/200 V (L-N/L-L voltage), 3 phases + neutral. |
| Rated frequency |
400 Hz |
| Rated power | Based on customer request. 320 kW MAX. (400 kVA @ pow.fact. 0,8). |
| Power scale resolution | Based on customer request: 1 kW minimum. |
| Cabinet | Iron sheet, thickness 20/10, powder finish RAL 7035. |
| Resistors | Tubular shaped, iron steel AISI 321 made. |
|
Airflow direction |
Vertical, from bottm to top. |
| Fan standard specifications |
Conveyor in carbon steel, impeller in polyamide reinforced with glass fiber (PAG). The device will be supplied with its test balancing certificate. Motor specifications: IP55 protection, F insulating class, EEF2 efficiency class, S1 service, tropicalized. Unducted frame. |
| Power connections | ISO 461 6-poles connector (7974D, AN 3430) - 1/0 up to 90 kVA, 2/0 over 90 kVA |
| Handling | Holes for forklift on bottom, eye-bolts on top |
| Controls | Manual, local, placed on a lateral sides of the cabinet. |
| AUX power supply | From external grid, 400 V - 50 Hz. |
| Safety outfit | Thermostatic switch for resistors overheating, fuses triad on each load step, thermal-magnetic fans protection, emergency stop button. |
Design and manufacuring executed according to customer specifications.
Other specifications
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Manual selector to enable or disable 28 VDC consent on E + F poles of power connector, according to operator or GPU needs.
-
Digital net analyzer showing the most important electrical measurements (V, A, Hz, kW, kVA).
- Optional: Automatic management of long duration test sessions based on prearranged test protocols (E.i.: Ordinary working test session = short duration - Engine decarbinizing cycle = long duration, both with appropriate starting and cooling ramps).