EAR Series — 28.5 VDC Converter-Rectifier Unit

The EAR series converter-rectifier unit converts standard utility AC to regulated 28.5 VDC for aircraft and helicopter ground power. The new-generation EAR line is defined by its MPCU microprocessor control platform, which handles all control, protection, and diagnostic functions and supports optional access control and energy consumption monitoring for stand-level or fleet-level operational reporting. Rated continuous output reaches up to 1,500 A, with peak capability to 2,500 A — the high peak capacity is specifically engineered for aircraft engine starting cycles, where the inrush current from the starter motor significantly exceeds steady-state avionics and systems demand. The EAR can be configured to supply other DC parameters beyond standard 28.5 V on request. The MPCU's diagnostic functions support fault history logging, facilitating planned maintenance and rapid troubleshooting at the unit level. As a fixed stationary unit, the EAR installs in pit systems, under-bridge assemblies, or cabinet enclosures on the hangar wall. Within the ElectroAir product architecture, the EAR series is the DC component that pairs with the EAC frequency converter series to produce the EACR combined unit; when only DC output is required, the EAR is specified in isolation. For stand specifications at airports serving fleets with significant DC power demand — turboprop feeders, regional jets with large DC bus loads, helicopter operators — the EAR is the correct dedicated DC converter.