400 HZ ALTERNATORS

Available in 14, 20, 24 and 26 pole configurations, the HC alternator range spans 5.5kVA to 180kVA with Class H insulation. Operating at 3,428rpm, 2,400rpm, 2,000rpm and 1,848rpm respectively, these machines deliver the precise 400Hz frequency essential for supporting aircraft and military ground equipment. All machines operate at 0.8 power factor with standard 115/200V or 208V windings available in 6 or 12 lead configurations.

Precise voltage control is critical in aerospace applications. All HC alternators are fitted with the AVR6-H400B regulator, an advanced compact electronic controller offering under frequency and over voltage protection with three phase sensing capability. Regulation accuracy of plus or minus 1 per cent ensures stable output across the full operating capability.

400Hz machines are engineered for continuous operation with minimal maintenance intervention. All machines feature sealed-for-life premium bearings with up to 30,000 hours’ life expectancy, eliminating the need for regular bearing servicing. Class H insulation uses four layers of polyester plus clear varnish and EG43 environment protection compound applied to both main and exciter windings. This multi-layer approach provides superior protection against environmental degradation. In addition, Mecc Alte’s TOTAL+ insulation system is standard on larger machines (HCP32 upwards) where operation is typically in more challenging environmental conditions.

All HC alternators are fitted with an auxiliary winding as standard, delivering over 300 per cent short circuit capability for 20 seconds to support motor starting and transient load demands.