400HZ Frequency Converter

Choose a 400 Hz GPU when the aircraft requires 115/200 VAC, 400 Hz external power for avionics, lighting, cabin systems, maintenance, preflight checks, or other powered ground operations. 400 Hz GPUs are common for commercial aircraft, business jets, military aircraft, special-mission aircraft, and aircraft maintenance hangars.

Aircraft use 400 Hz electrical power because higher-frequency AC power allows motors, transformers, and other electrical components to be smaller and lighter than equivalent 50 Hz or 60 Hz equipment. Weight reduction is critical in aviation for many reasons, which is why 400 Hz power is widely used for aircraft systems and aircraft ground power support.

Yes. Unitron aircraft ground power units are available in multiple configurations depending on the product family and use application. Common configurations include mobile, towable, fixed, and bridge-mounted units for hangars, ramps, flight lines, boarding bridges, and maintenance facilities.

A solid-state frequency converter rectifies incoming AC power into DC and then uses power electronics to invert that DC into a controlled AC output at the required voltage and frequency. This allows the converter to provide stable 400 Hz aircraft power when the incoming utility frequency is 50 Hz or 60 Hz.

For hangars, the best GPU configuration depends on aircraft type, output power, cable length, safety requirements, and how often the aircraft position is used. Fixed or bridge-mounted GPUs are preferred for dedicated maintenance bays, while mobile or towable GPUs are preferred when the same unit must be relocatable to serve multiple aircraft positions.

Unitron supports military aircraft ground power applications requiring 400 Hz AC, 28 VDC, 270 VDC, or combination AC/DC power. These applications can include flight line support, maintenance hangars, depot maintenance, avionics testing, aircraft system checks, and advanced military aircraft electrical system support.