Motor-Generators (MG) are the core of a well-designed central-based 400Hz ground power system. The foundation of our central systems is the Kato Engineering MG. Backed by over 85 years of solid, reliable, engineering, Kato MG sets were the first rotating product Kato Engineering manufactured back in 1926 and have evolved over the years to meet our customer’s special requirements and power demands of the modern aviation industry.

Kato Engineering’s 400Hz MG sets supply conditioned and converted power available from 25kVA-400kVA and inputs for either 50Hz or 60Hz. When using multiple paralleled MG sets, the power capacities are limitless.

The motor-generator sets offer the following advantages:

Long life: The mean time before failure (MTBF) for a motor-generator is in excess of 100,000 hours (with a 100,000 L10h bearing life). This is four times the average MTBF of a solid state converter.

Low maintenance cost: KATO offers a horizontal, single-shaft design, which means that there are no couplings, gears or belts to wear out. KATO exciters are brushless; there are no commutators or brushes to replace.

Low harmonics: Harmonics can be a contributing factor in nuisance tripping of the circuit breakers, transformer failures and incidental damage to electronic components. MGs have a smooth sine wave generated by the mechanical construction of the generator resulting in negligible harmonic distortion.

High overload capability: MGs are better suited to take short-term overload situations (300% of nominal amps for 3s). Overload conditions, while not common, can occur when aircraft hydraulic motors or ovens operate.

Proven Technology: KATO MGs are built with the latest technology and are backed by 85 years of experience in building rotary motor generators.

Other features include:

  • Made in the US
  • 12in touchscreen, human machine interface (HMI)
  • Ethernet / IP communications standard
  • Protective relays
  • Transient spike protection