EAL-Series Load Banks

Load banks are the calibration and verification tool for GPUs: without a controlled electrical load, it is impossible to confirm that a GPU's output remains within specification under the current demands that aircraft systems will actually impose. The EAL series covers the full range of ElectroAir GPU output types — DC variants (EAL-28 for standard 28 V testing, EAL-28-56 for dual 28/56 V systems, EAL-180 for high-current testing up to 1,800 A) and AC variants (EAL-400 for 400 Hz power simulation, EAL-450 for combined AC/DC diagnostics). Portable and rugged construction allows field use at the aircraft stand or transport to a workshop bench for off-line commissioning. The diagnostic role of load banks extends beyond initial GPU commissioning: they are essential tools for verifying GPU performance after repair, for validating power quality (voltage regulation, frequency stability, THD) before connecting high-value avionics, and for scheduled calibration as part of an ISO 17025 or similar QMS programme at MRO facilities. For procurement teams, load banks are a supporting infrastructure item that is often overlooked in GPU procurement packages but is necessary for the responsible maintenance programme of any GPU fleet.