User Manual

General installation
Caution: The airflows shown in this table will provide acceptable cooling for an open power unit operating in ambient temperatures of up
to 53 °C (127 °F) or 46 °C (114.8 °F) if a canopy is fitted. If the power unit is to be enclosed totally, a cooling test should be done to check
that the engine cooling is acceptable. If there is insufficient cooling, contact Perkins Technical Service Department.
Designation Units
Type of Operation and Application
Prime Stand-by Prime Stand-by
50 Hz 50 Hz 60 Hz 60 Hz
Gross engine power kWm 59,6 65,6 70,7 77,8
Brake mean effective pressure kPa (lbf/in²) 1084 (157.2) 1193 (173.0) 1071 (155.3) 1179 (170.9)
Mean piston speed m/s (ft/s) 6,35 (20.8) 6,35 (20.8) 7,62 (25.0) 7,62 (25.0)
ElectropaK net engine power kWm 58,4 64,3 68,6 75,5
Engine coolant flow 35 kPa restriction I/min (UK gal/min)
142
(31.2)
142
(31.2)
170
(37.3)
170
(37.3)
Combustion air flow m³/min (ft³/min) 4,0 (141.2) 4,2 (148.3) 5,3 (187.1) 5,5 (194.2)
Exhaust gas flow (max) m³/min (ft³/min) 10,5 (370.8) 11,4 (402.5) 13,5 (476.7) 14,3 (504.9)
Exhaust gas temperature (max) in manifold °C (°F) 515 (959) 550 (1022) 505 (941) 535 (995)
Cooling fan air flow m³/min (ft³/min) 89,0 (3143.0) 89,0 (3143.0) 111,0 (3919.9) 111,0 (3919.9)
Overall thermal efficiency % 42,5 40,0 39,5 39,5
Typical genset electrical unit (0.8 pf 25° C)
kWe 52,0 57,2 60,8 66,9
kVA 65,0 71,5 76,0 83,6
Assumed alternator effiency % 89%
Energy balance
Power in fuel (Fuel heat of combustion) kW (Btu/min) 147,0 (8367.1) 164,0 (9334.8) 179,0 (10188.6) 197,0 (11213.1)
Power output (gross) kW (Btu/min) 59,6 (3392.4) 65,6 (3733.9) 70,7 (4024.2) 77,8 (4428.3)
Power to cooling fan kW (Btu/min) 1,2 (68.3) 1,3 (73.9) 2,1 (119.5) 2,3 (130.9)
Power output (net) kW (Btu/min) 58,4 (3324.1) 64,3 (3659.9) 68,6 (3904.6) 75,5 (4297.4)
Power to coolant and lubricating oil kW (Btu/min) 37,0 (2345.0) 41,0 (2737.8) 43,0 (2447.5) 48,0 (2732.1)
Power to exhaust kW (Btu/min) 41,0 (2601.2) 47,0 (2891.5) 53,0 (3016.7) 58,0 (3301.3)
Power to radiation kW (Btu/min) 10,0 (643.1) 11,0 (722.8) 12,0 (683.0) 13,0 (739.9)
BDC for engine manuals and specs
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