MEP531A – MEP501A Manuals

The MEP-531A unit is a 2kW continuous-run diesel generator powered by a modern single cylinder air-cooled Yanmar engine. It operates at 3600 RPM to help save on weight and size. These units can easily run between 3,000 and 5,000 hours before a rebuild is needed. The MEP-501A variant is a 28vDC (Direct Current) generator. This unit is ideal for recharging batteries in a solar/wind system.

MEP-531A – MEP-501A Specifications

Identification Data
Description	2 kW MTG Set, 60 Hz, DED, Tubular Frame				2 kW MTG Set, 28 VDC, DED, Tubular Frame
Model	MEP-531A				MEP-501A
NSN (first buy)	6115-21-912-0393				6115-21-912-0392
NSN	6115-01-435-1565				6115-01-435-1567
LIN	G36237				G36169
SSN	M59400				M59400
Physical Characteristics
Dimensions LWH (in)	30 x16 x 22 (Cube: 6 ft3)
Wet Weight (lbs)	MEP-531A: 158				MEP-501A: 138
Engine	Yanmar L48AE-DEG Diesel, 1 cylinder/4 stroke, 4.2 horsepower @ 3600 RPM, air cooled, 24 VDC start from NATO slave receptacle, recoil pull starter.
Instrumentation	Voltmeter, ammeter, hour meter, frequency meter (AC only).
Fuels	Diesel DL-1, DL-2 and JP-8
Fuel Capacity	Fuel tank: 1.6 gal.
Performance Characteristics
Power Rating	2kW, 1.0 pf @4000 ft/95°F. 110% Max power; derate: 1.3%/328 ft from 4000 to 8000ft
Environmental Capability	-40°F to 120°F, rain, humidity, altitude, sand/ dust, rail transport, -65°F cold storage, salt spray, fungus, 15° incline
Protective Devices	Trip circuit breaker for overload/short circuit. Automatic shutdown for low oil pressure.
Fuel consumption	0.33 gph @ rated load.				0.33 gph @ rated load.
Human Factors	MIL-STD-1474: 4 soldier portable: operable in chemical/arctic clothing.
Noise	79 dBA @ 7 meters (23 ft).
Reliability (MTBF)	818 hr				490 hr
Maintenance Ratio	0.033 – organization;				0.008 – direct support.
Electrical Characteristics
Voltage Connection	120 V, 1 phase, 2 wire				28 VDC, 2 wire
Voltage adj. Range	114 to 126 V				26.6 – 32.0 V
Freq. adj. Range	±5.5%				N/A
Electrical	Drip proof generator enclosure, fungus & moisture treated, solid state voltage regulator, brush type 2 pole alternator, solderless connectors, AC alternator: Mechron Power, DC Alternator: Balmar.
Electrical Performance
Electric Power Quality			AC Voltage		Frequency		DC Voltage
Regulation			4%		5.6%		4%
Voltage modulation			2%
Short term steady state stability (30 sec)			2% bandwidth		3% bandwidth		2% bandwidth
Long term steady state stability (4 hr)			4% bandwidth		3% bandwidth		2% bandwidth
Application of rated load (transient), recovery time			30% dip,3 sec,		8% undershoot,4 sec		30% dip,1 sec
Rejection of rated load (transient), recovery time			30% rise,3 sec		10% overshoot,5 sec		40% rise,0.5 sec
Motor load			not rated
Max waveform deviation factor			16%
Individual waveform harmonic			15%
DC ripple							7%
EMI			Meets MIL-STD-461C Not Protected
EMP			Not protected.
Optional Equipment
Description		NSN		Weight (lbs)		Effect on Dimensions (in)
Auxiliary Fuel System		See TM 9-6115-673-13&P
Technical Manuals
Description		Army		Air Force		Marine Corps
Operator, Unit, DS/GS, Parts		TM 9-6115-673-13&P		TO 35C2-3-512-1		None

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MEP-531A – MEP-501A Specifications

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