The Model R-400 is a static 28 Volt DC Ground Power Unit designed for electrical and mechanical simplicity, physical ruggedness and component accessibility, all contributing to highly reliable operation, ease-of-use and easy maintenance.

The R-400 accepts three-phase, 50/60 Hz, 208/230/380 or 460 VAC Input Power, allowing the unit to be used virtually anywhere in the world. Built-in safety features include heavy-duty thermostats in the input control circuit, which are designed