Auxiliary Power Unit – A151K
A151K / ONBOARD AUXILIARY POWER Auxiliary Power Unit – A151K
The Auxiliary Power Unit – A151K is an integrated onboard power system designed to supply electrical energy to armored military vehicles when the main engine is switched off. It supports stationary and low-noise operation, onboard mission systems and emergency power requirements while reducing dependence on continuous main-engine operation.
Integrated auxiliary power platform for armored vehicles, silent-mode operation, onboard mission systems and emergency electrical support.
Independent Onboard Power with the Main Engine Switched Off
The Auxiliary Power Unit – A151K supplies electrical power to vehicle systems without requiring the main engine to remain operational. It supports electrical, pneumatic and hydraulic subsystems during stationary or low-noise missions and can contribute to pre-mission preparation activities involving onboard weapons, electronics and main-engine cooling.
In emergency conditions where the main engine is damaged or unavailable, the A151K can continue supplying critical systems to preserve limited vehicle functionality and operational capability.
Flexible Integration Across Armored and Mission Platforms
The A151K can be installed internally in sound-insulated compartments or externally on the vehicle structure according to platform requirements. Applicable platforms include main battle tanks, armored and infantry fighting vehicles, armored personnel carriers, MRAP vehicles, tactical and support vehicles, and other tracked or wheeled military systems.
The supplied information also identifies stationary and mobile applications such as shelters, radar units, communication systems and targeting equipment.
Voltage28
VDC
Vehicle-Fed Architecture Without a Dedicated Fuel Tank or Battery
The A151K operates independently from the main engine while drawing fuel directly from the vehicle fuel tank and initial electrical power from the vehicle battery. The supplied configuration therefore does not require a dedicated APU fuel tank or battery.
The system may operate as a standalone auxiliary power unit or be integrated with life-support systems including heating, ventilation, air conditioning and KBRN protection. Depending on application requirements, air-cooled or water-cooled diesel-engine configurations can be used.
A151K Auxiliary Power Features
Main-Engine-Off Power
The A151K supplies onboard systems while the vehicle's main engine is not running.
Silent-Mode Support
Independent auxiliary power reduces reliance on main-engine operation during low-noise stationary missions.
Co-Generation Capability
The APU can monitor vehicle power demand and provide additional power alongside the main generator when required.
Automatic & Manual Start
The electronic control interface supports both automatic and manual start modes.
Remote Control
Remote-control capability allows system functions to be managed from within the vehicle.
Emergency Power Support
The unit can supply critical systems when the main engine is damaged or inoperable.
Power, Control and Vehicle Integration
Electrical Output
- Output Voltage
- 28 VDC.
- Continuous Power
- 5,3 kVA.
- Output Power
- 6,7 kVA.
Vehicle Integration
- Fuel Source
- Vehicle fuel tank.
- Initial Electrical Power
- Vehicle battery.
- Installation
- Internal sound-insulated compartment or external vehicle mounting.
Control & Monitoring
- Control Unit
- IP67-protected electronic control unit with digital display.
- Start Modes
- Automatic and manual.
- Monitoring
- Temperature, fuel level, pressure, DC current, battery voltage and fault information.
Operational Applications
Auxiliary Power for Mission Systems and Life-Support Equipment
The A151K can support onboard electronics, weapon systems, vehicle computers, fire suppression systems, power distribution units, HVAC systems and KBRN protection equipment without continuous reliance on the main engine.
Its co-generation capability allows the APU to operate alongside the vehicle's main generator, monitor power demand and provide supplementary power when required. This architecture is intended to accommodate increasing onboard electrical demand as additional systems are integrated.
Environmental, EMC, Power and Reliability References
The supplied product information states that the A151K is designed and tested in accordance with the following military standards for electromagnetic compatibility, environmental performance, electrical power and reliability considerations.
Frequently Asked Questions
01What output voltage is specified for the A151K?
The supplied technical table specifies an output voltage of 28 VDC.
02What continuous and output power values are listed?
The technical table lists 5,3 kVA continuous power and 6,7 kVA output power.
03What maximum current is specified for the APU?
The supplied specification lists a maximum current of 300 A.
04What operating and storage temperature ranges are listed?
The operating range is -32°C ~ +55°C, while storage temperature is specified as -40°C ~ +60°C.
05What system weight and operating elevation are specified?
The technical table lists 450 kg ±20 system weight and a maximum operating elevation of 3000 m.
Technical Data
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