Auxiliary Power Unit 3kW APU

Specifications

Engine Manufacturer Farymann (Germany)
Engine Model 18W water-cooled, 4.7 kW (ICFN)
Engine Overspeed Protection 3600 rpm
Alternator Type Compact Permanent Magnet Generator (PMG)
Coupling Directly mounted on flywheel
Maximum Electrical Power 4 kW @ 28 VDC
Alternator Manufacturer MLS
Alternator Current Limit 107 A
Alternator Speed 2800–3400 rpm
Alternator Cooling Liquid (engine coolant, 50/50 Ethglycol/Water)
Environmental Protection Sand & Dust MIL-STD-810F, EMC MIL-STD-461E
Fuel Consumption 1.55 l/hr @ 3 kW
Noise Level < 75 dB
Operating Temperature -32 to +55°C (-25.6 to 131°F)
Low Temperature Startup 3 automatic attempts with air & oil heaters, manual start handle
Protections Reverse polarity, overcurrent, overvoltage, overtemperature, low oil pressure, emergency kill switch
Dimensions (L x W x H) 675 x 450 x 720 mm
Enclosure Aluminum
Weight ~115 kg
CANBus 2.0
Applications Wheeled vehicles, military trucks, genset applications

The APU PN 505-9900 is a compact, water-cooled auxiliary power unit designed for military vehicles, trucks, and portable genset applications. Equipped with a Farymann 18W engine and MLS permanent magnet alternator, it provides reliable 28 VDC electrical power with low fuel consumption and rugged environmental protection. The system is engineered to meet MIL-STD requirements for dust, sand, and EMC compliance, ensuring dependable operation in harsh field conditions.

Features

Provides up to 4 kW of electrical power at 28 VDC
Compact permanent magnet generator directly mounted on the flywheel
Water-cooled Farymann 18W engine with low fuel consumption
Rugged design compliant with MIL-STD-810F (sand & dust) and MIL-STD-461E (EMC)
Equipped with CANBus 2.0 and multiple protections including reverse polarity, overcurrent, overvoltage, overtemperature, low oil pressure, and emergency kill switch