Senior Technical Author
Transcription
Senior Technical Author
Technical Data 4000 Series 4012-46TWG4A Diesel Engine - ElectropaK Basic technical data Number of cylinders .. ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... . 12 Cylinder arrangement ... ... ... ... ... ... ... ... ... ... ... ... ... ... Vee 60° Cycle . ... ... ... ... ... ... ... ... ... ... ... ..4 stroke, compression ignition Induction system ... ... ... ... ... ... ... ... ... ... ... ... ... ... turbocharged Combustion system... ... ... ... ... ... ... ... ... ... ... ... . direct injection Compression ratio . ... ... ... ... ... ... ... ... ... ... ... ... ... .13:1 nominal Bore... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... 160 mm Stroke ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... 190 mm Cubic capacity... ... ... ... ... ... ... ... ... ... ... ... ... ... ... . 45,842 litres Direction of rotation ... ... ... ... ... Anti clockwise viewed on flywheel Firing order ... ... ... ... ... ... ... 1A,6B,5A,2B,3A,4B,6A,1B,2A,5B.4A,3B Cylinders 1 ... ... ... ... ... ... ... ... ... ... ... ... ... furthest from flywheel Note: Cylinders designated ‘A’ are on the right hand side of the engine when viewed from the flywheel end. Total weight of ElectropaK Engine (dry)... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... 4440 kg ElectropaK (wet) (1) (2) .. ... ... ... ... ... ... ... ... ... ... ... ... ... 5615 kg 1. Includes fuel cooler. 2. Includes engine lubricating oil and water jacket. Overall dimensions of ElectropaK Height ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... .. 2255 mm Length ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... .. 3714 mm Width . ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... .. 1780 mm Moment of inertia (mk²) Flywheel ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... . 9,57 kgm² Engine ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... . 9,73 kgm² 1500 rev/min Cyclic irregularity For engine/flywheel maximum ... ... ... ... ... ... ... ... ... ... ... .. 1:752 Ratings Steady state speed stability at constant load . ... ... ... ... .. ± 0,25% Electrical ratings are based on average alternator efficiency and are for guidance only (0.8 power factor being used). Operating point Engine speed ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... 1500 rev/min Static injection timing . ... ... ... ... ... ... ... ... ... ... ... .spill timing 20° Cooling water exit temperature .. ... ... ... ... ... ... ... ... ... ... < 98 °C Fuel data to conform to: . ... ... ... ... ... ... ... ... ... BS2869 class A2 Performance Note: All data based on operation to ISO 3046/1, BS 5514 and DIN 6271 standard reference conditions. Highest estimated sound pressure level at 1 metre ... ... 111 d(B)A Additional noise data is shown at rear of this document Test conditions -air temperature.. ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ...25 °C -barometric pressure .. ... ... ... ... ... ... ... ... ... ... ... ... ... ...100 kPa -relative humidity ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... 30% -air inlet restriction at maximum power (nominal)... ... ... ... 2,5 kPa -exhaust back pressure at maximum power (nominal)... ... 3,0 kPa -maximum fuel temperature (inlet pump) ... ... ... ... ... ... ... ...58 °C For engines operating in ambient conditions other than the standard reference conditions stated below, a suitable de-rate must be applied. De-rate curves for increased ambient temperatures and / or altitude are available on the Perkins Intranet site. For test conditions relevant to data on load acceptance, please refer to Cold start recommendations on page 9 of this document. General installation - 4012-46TWG4A 50Hz (Temperate cooling) Designation Units Gross engine power kWb Fan and battery charging alternator power kW Type of operation and application Prime Standby 1308 1396 54 Net engine power kWm 1254 1342 Brake mean effective pressure (gross) kPa 2283 2436 Combustion air flow at ISO conditions m³/min 113 Exhaust gas temperature (max) after turbo Exhaust gas flow (max) at atmospheric pressure °C 118 470 m³/min 285 Boost pressure ratio :1 3,4 3,6 Mechanical efficiency % 91 92 Overall thermal efficiency (nett) % 39 Friction and pumping power losses kWm 38 120 Mean piston speed m/s 9,5 Engine coolant flow l/min 948 Typical GenSet electrical output (0.8pf) Assumed alternator efficiency kVA 1500 kWe 1200 % 1600 1280 96 Note: Not to be used for CHP design purposes (indicative figures only). Consult Perkins Engines Stafford Limited. Assumes complete combustion. Rating definitions Prime Power Variable load. Unlimited hours usage with an average load factor of 80% of the published Prime Power over each 24 hour period. A 10% overload is available for 1 hour in every 12 hours operation except where stated. Standby power Limited to 500 hours annual usage with an average load factor of 80% of the published Standby Power rating over each 24 hour period.Up to 300 hours of annual usage may be run continuously. No overload is permitted on Standby Power. Emissions capability All 4012-46TWG ratings are optimised to the ‘best fuel consumption’ and do not comply to Harmonised International Regulation Emission Limits. More information on these statements can be obtained by contacting the Applications Department at Perkins Engines Company Limited. FRONT GROOVE IN PULLEY LUB.OIL FILLER CRANKSHAFT PULLEY 5 GROOVE FOR SPB & B SECTION BELTS TO BS3790:1995 FAN LOW OIL PRESSURE SWITCH. 1 EACH SIDE. RADIATOR WATER LEVEL SWITCH LUB.OIL DIPSTICK 533 19 GROOVE CRS FUEL LEAK-OFF CONN. 1312 FRONT FACE OF C/CASE 391 2236 SUMP DRAIN PLUG G1" (BOTH SIDES) G1/4" TAPPING FOR LUB. OIL PRESS. CONN. 786 73.5 FUEL LEAK-OFF NO FUEL COOLER FITTED 1618 3750 OVERALL LENGTH ø 26.5 HOLE REAR 1280 25 TURBOCHARGERS IS EXERTED ON TO ENSURETHAT NO LOAD ADEQUATELY SUPPORTED PIPEWORK MUST BE FLANGE DETAIL. SYSTEM 1 EACH SIDE. SEE EXHAUST OUTLET ELBOW 1 EACH SIDE ENGINE ONLY LIFTING BRACKET COOLANT DRAIN TAP. 1 EACH SIDE. CRANKCASE INSPECTION COVERS CRANKSHAFT REAR FACE OF FLYWHEEL HSG. B BANK SIDE VIEW G3/8" TAPPING FOR LUB. OIL TEMP. CONN. LUB. OIL COOLER 1 EACH SIDE 189 4012-46TWG4A Temperate - left view REAR FACE OF C/CASE 4012-46TWG4A Temperate - front view 1873 CRS 936.5 RADIATOR FILLER 0.7 BAR RELIEF VALVE FUEL COOLER WHEN FITTED G 3/8" AND G 1/2" TAPPINGS IN THERMOSTAT HOUSING 1 EACH SIDE Rp 1/2" TAPPING IN THERMOSTAT HOUSING. 1 EACH SIDE 1805 OVER MATRIX 701 902.5 513 510 FUEL COOLER CONNECTIONS 513 16 SLOTS 11 X 19 (FOR DUCTING PURPOSES) ELECTRONIC ACTUATOR THERMOSTAT HOUSING 1 EACH SIDE FUEL LEAK-OFF CONN. TO SUIT 15 mm O/D PIPE. 'BITE' TYPE NON-RETURN VALVE SUPPLIED. 1 EACH SIDE. FUEL INLET CONNECTION ø 15 OUTSIDE STEEL PIPE. MAXIMUM FUEL LIFT 2,5 METRES WHEN FUEL TANK OUTLET IS LOWER THAN LIFT PUMP INLET A NON-RETURN VALVE MUST BE FITTED AT FUEL TANK. IF MAX. FUEL LIFT FIGURE IS EXCEEDED 385 75 CONSULT PERKINS TECHNICAL DEPT. CRANKSHAFT 570 385 1662 OVER MATRIX 7 PITTCHES @ 226 =1582 ø 20 HOLE FRONT LIFTING BRACKET (ENGINE ONLY) 1 EACH SIDE 235.4 ENGINE FEET 254.5 22 294.5 FUEL FILTER/WATER SEPARATOR RADIATOR DRAIN PLUG G1/2" 315 370 CRANKSHAFT 641 315 353 70 CLEARANCE REQUIRED TO REMOVE SUMP TORSIONAL VIBRATION DAMPER G1/4" TAPPING FOR LUB.OIL PRESS.CONN. STARTER RELAY DUAL 24V. STARTERS LUB. OIL FILTERS 3 EACH SIDE CHARGE AIR COOLER 1 EACH SIDE EXHAUST GAS HIGH TEMP: PROTECTION MODULE AIR FILTERS 1 EACH SIDE. G3/8" TAPPING FOR LUB.OIL TEMP.CONN. ELECTRONIC CONTROL UNIT FOR ACTUATOR. NO FUEL COOLER FITTED 36 FUEL LEAK-OFF CONN. FUEL HAND-PRIMING PUMP FUEL LIFT PUMP LUB. OIL PUMP 1634 C OF G WET WITH FUEL COOLER 1635 C OF G WET WITHOUT FUEL COOLER 605 1 EACH SIDE. H.W.T. PROTECTION SWITCH. 12 FRONT LIFTING BRACKET 248.5 24 V ALTERNATOR CRANKSHAFT FUEL LEAK-OFF CONN. AIR FLOW G3/4" FUEL COOLER CONNECTIONS 981 BREATHER CONN. 1 EACH SIDE FLEX. HOSE 51 I/DIA X865 LONG SUPPLIED LOOSE 4012-46TWG4A Temperate - right view FRTONT FACE CRANKCASE 4012-46TWG4A Temperate - rear view 1978 OVERALL WIDTH 1905 OVER RADIATOR CRANKSHAFT AIR FILTER RESTRICTION INDICATOR. 1 EACH SIDE 301 B BANK 24 V AIR SHUT-OFF VALVE ENERGISED TO CLOSE. 1 EACH SIDE 301 A BANK 1400 CLEARANCE REQUIRED TO REMOVE FUEL FILTER HEIGHT 235.4 ENGINE FEET ROTATION CRANKSHAFT 25 611 2255 OVERALL 280 552.5 646 10 39 6 HOLES M16 X 30 DEEP EQUALLY SPACED ON ø543 (21.38") P.C.D. 11.25° 182 SUMP DRAIN PLUG 182 16 HOLES M12 X 21 DEEP EQUALLY SPACED AS SHOWN ON ø851 (33.5") P.C.D. 4012-46TWG4A Temperate - Support pads, exhaust outlet flange and flywheel details ø406 8 HOLES ø 22 EQUALLY SPACED ON ø 356 PC 22,5° ø250 DETAIL OF EXHAUST OUTLET FLANGE (B.S.10 TABLE D) SCALE 1:5 10 15.7 ø 100,035 100,00 ø 571,6 571,5 ø498 ø592 ø883 ø 787,65 787,4 CRANKSHAFT 6,5 DETAIL OF SAE 518 FLYWHEEL AND SAE 00 FLYWHEEL HOUSING (METRIC TAPPINGS) SCALE 1:5 300 2369 300 100 1744 60 70 4 91 98 FRONT FACE C/CASE 1000 175 6 HOLESø 22 950 REAR FACE FLYWHEEL HSG 500 39 435 CRANKSHAFT 451 1900 135 154 221 PLAN VIEW OF SUPPORT PADS 150 900 1978 Cooling system Fuel system Recommended coolant: 50% inhibited ethylene glycol or 50% inhibited propylene glycol and 50% clean fresh water. For CHP systems and where there is no likelihood of ambient temperature below 10 °C, then clean ‘soft’ water may be used, treated with 1% by volume of Perkins inhibitor in the cooling system. The inhibitor is available in 1 litre bottles from all Perkins Distributors. Maximum pressure in crankcase water jacket ... ... ... ... .. 170 kPa Maximum top tank temperature (standby) . ... ... ... ... ... ... .. 98 °C Maximum static pressure on pump ... ... ... ... ... ... ... ... ... 70 kPa Ambient cooling clearance (standby power) with air temperature at fan of 6 °C above the ambient ... ... ... ... ... ... ... ... ... ... ... ... 38 °C Injection system... ... ... ... ... ... ... ... ... ... ... ... ... ... direct injection Fuel injection pump/Injector type. ... ... ... ... ... . Delphi unit injector Injector pressure . ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... 23,4 MPa Fuel lift pump type ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ...Gerotor Delivery flow ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... . 1020 litres/hr Heat retained in fuel to tank ... ... ... ... ... ... ... ... ... ... ... ... 9,5 kW Fuel inlet temperature to be less than . ... ... ... ... ... ... ... ... . 58 °C Delivery pressure ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... . 300 kPa Maximum suction head at pump inlet.. ... ... ... ... ... ... ... 24,5 kPa Maximum static pressure head ..see installation manual for details Fuel filter spacing ... ... ... ... ... ... ... ... ... ... ... ... ... ... 10 microns Governing type ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... electronic Governing ... ... ... ... ... ... ... ... ... ... ... ... ... ... to ISO 8528-5 2005 Torque at the governor output shaft ... ... ... ... ... ... ... ... ... . 1·631 Tolerance on fuel consumption ... ... ... ... ... ... to ISO 8528-1 1993 Total coolant capacity Electrounit (engine only) ... ... ... ... ... ... ... ... ... ... ... ... ... 73 litres ElectropaK -engine and radiator ... ... ... ... ... ... ... ... ... ... ... ... ... ... ..201 litres Maximum permissible restriction to coolant pump flow.. ... 20 kPa Thermostat operating range... ... ... ... ... ... ... ... ... ... ... 71 - 85 °C Temperature rise across the engine (standby power) with inhibited coolant .. ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... 15 °C Shutdown switch setting ... ... ... ... ... ... ... ... ... ... 101 °C (rising) Coolant immersion heater capacity ... ... ... ... ... ... ... ... . 2 x 4 kW Fuel specification Fuel Density @ 15 °C.. ... ... ... ... ... ... ... ... ... ... ... .. 0,862 kg/litre Recommended fuel . ... ... ... ... ... ... ... ... ... ... ... ... ... ... see OMM Fuel consumption Note: All fuel consumption figures are based on assumed fuel density of 0.862 and Nett rated powers Water jacket cooling data Coolant flow ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ..948 l/min Coolant exit temperature (max) . ... ... ... ... ... ... ... ... ... ... ... 98 °C Coolant inlet temperature (min) . ... ... ... ... ... ... ... ... ... ... ... 70 °C Coolant inlet temperature (max) ... ... ... ... ... ... ... ... ... ... ... 85 °C 4012-46TWG4A - Temperate Designation Coolant pump Fuel consumption calculated on nett rated powers g/kWh litres/hr -speed ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... 1.4 x engine rev/min -method of drive . ... ... ... ... ... ... ... ... ... ... ... engine (gear) driven Standby power 219 350 100% of Prime power 217 316 Radiator 75% of Prime power 214 233 Face area... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... .. 2967420 mm² Number of rows and material . ... ... ... ... ... ... ... ... ... ... ... ... .. 226 Fins per inch and material.. ... ... ... ... ... ... ... ... ... ... ... ... ... ... .. 7 Width of matrix ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... . 1805 mm Height of matrix.. ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... . 1644 mm Weight (dry) ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... . 843 kg Total coolant capacity ... ... ... ... ... ... ... ... ... ... ... ... ... ..128 litres Pressure cap setting (min) . ... ... ... ... ... ... ... ... ... ... ... ... . 69 kPa 50% of Prime power 220 160 Fan Type ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ...engine driven Diameter ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... . 1530 mm Number of blades... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... 12 Material .. ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... Aluminium Drive ratio... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... 1:0,9 Cooling clearance 4012-46TWG4A Maximum additional restriction (duct allowance) to cooling airflow, and resultant min airflow Description Ambient clearance: Inhibited coolant °C Pa m³/min 38 N/A N/A Duct allowance 38 0 1938 Minimum airflow 38 0 1938 Electrical system Alternator -type ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... . insulated return -voltage ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... .. 24 volts -output . ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... 40 amps Starter -type ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... (axial) electric -motor voltage . ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... .. 24 volts -motor power ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... . 16,4 kW Number of teeth on -flywheel .. ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... 156 -starter motor... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... .. 12 Minimum cranking speed ... ... ... ... ... ... ... ... ... ... ... 120 rev/min Starter solenoid (24V) -pull in current @ -25 °C max .. ... ... ... ... ... ... ... ... ... ... 30 amps -hold in current @ -25 °C max. ... ... ... ... ... ... ... ... ... ... .. 9 amps Engine stop solenoid current... ... ... ... ... ... ... ... ... ... ... 1,1 amps Engine stop solenoid voltage .. ... ... ... ... ... ... ... ... ... ... ...24 volts Engine mounting Energy balance Maximum static bending moment at rear face of block .. 1356 Nm Maximum additional load applied to flywheel due to rotating components... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... .. 850 kg 4012-46TWG4A - Temperate Centre of gravity Bare engine (wet) 4012-46TWG4A -forward of rear face of cylinder block ... ... ... ... ... ... ... ... 658 mm -above crankshaft centre line ... ... ... ... ... ... ... ... ... ... ... . 32 mm ElectropaK (wet) -forward of rear face of cylinder block ... ... ... ... ... ... ... . 1286 mm -above crankshaft centre line ... ... ... ... ... ... ... ... ... ... ... . 32 mm Cold start recommendations Temperature range Down to 0 °C (32 °F) Oil: API CH4 15W40 Starter: 2 x 24 volts Battery: 4 x 12V 286 Ah Max breakaway current: 1600 amps Cranking current: 810 amps Aids: N/A Min mean cranking speed:120 rev/min Designation Units Prime power Standby power 3492 Energy in fuel kWt 3238 Energy in power output (gross) kWb 1308 Energy to cooling fan kWm Energy in power output (nett) kWm 1254 1342 Energy to exhaust kWt 1118 1196 Energy to coolant and oil kWt 472 537 Energy to radiation kWt 65 69 Energy to charge cooler kWt 275 294 1396 54 Lubrication system Recommended multigrade oil viscosity (15W40) which adequately meets the specifications of API CG4. For further details refer to the engine OMM. Lubricating oil capacity Total system ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... . 177 litres Sump maximum . ... ... ... ... ... ... ... ... ... ... ... ... ... ... .. 157,5 litres Sump minimum .. ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... . 115 litres Oil temperature at normal operating conditions . ... ... ... ... .. 95 °C Oil temperature (in rail) - maximum continuous operation . 105 °C Notes: Lubricating oil pressure z The battery capacity is defined by the 20 hour rate z The oil specification should be for the minimum ambient temperature as the oil will not be warmed by the immersion heater z Breakaway current is dependant on battery capacity available. Cables should be capable of handling the transient current which may be up to double the steady cranking current. minimum . ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... .. 340 kPa At rated speed ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ...450 kPa Oil relief opens ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ...400 kPa Oil filter screen spacing .. ... ... ... ... ... ... ... ... ... ... ... . 20 microns Sump drain plug tapping size . ... ... ... ... ... ... ... ... ... ... ... ... .. G1 Lubricating oil pump speed ... ... ... ... ... ... ... 1.4 x engine rev/min Lubricating oil pump drive method . ... ... ... ... ... ... .. engine driven Shutdown switch - pressure setting (where fitted) 193 kPa (falling) Exhaust system Normal operating angles Outlet size (internal) .. ... ... ... ... ... ... ... ... ... ... ... ... ... ... 254 mm Outlet flange size .. ... ... ... ... ... ... ... ... ... ... ... ... ... ... 10” table D Total exhaust back pressure . ... ... ... ... ... ... ... ... ... ... ... 5,0 kPa For pipe sizes, refer to ‘Installation Manual’ Oil consumption (prime power) Induction system Emissions data with combustion air temperature of 25 °C Maximum air intake restriction of engine: -clean filter. ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... . 2,0 kPa -dirty filter .. ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... . 4,0 kPa -air filter type . ... ... ... ... ... ... ... ... ... ... ... .Medium duty axial flow -front and rear. ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... 5° -side tilt ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... . 10° After running-in (typically after 250 hours) . ... ... ... ... . g/kW hr 1.8 Oil flow rate from oil pump . ... ... ... ... ... ... ... ... ... ... ... ... .. l/s 6,0 4000 Series 4012-46TWG4A Noise Noise measured in semi reverberant environment and measured at a distance of 1 metre from the periphery of the engine. 584/485FC radiator Noise measured at points 1 - 6 @ 1434 kWb gross Fan 6 Position d(B)A 1 113.5 2 113.5 3 112.0 4 111.7 5 113.4 6 112.8 1 2 Engine 5 Frequency analysis @ Point 1 1396 kWb gross Hz 4 3 Noise levels The figures for noise levels are typical for an engine running at standby power rating in a semi-reverberant environment and measured at a distance of one metre from the periphery of the engine. Total noise level Sound pressure level re: -20x10 Pa Ambient noise level 84 d(B)A Octave analysis performed at the position of maximum noise. d(B)A 31.5 88.0 63 92.6 125 95.8 250 109.6 500 109.4 1k 102.8 2k 100.0 4k 95.1 8k 90.2 16k 84.0 Typical load acceptance (cold) 2nd load application immediately after engine has recovered to rated speed (5 seconds after initial load application) Engine type Prime power % Load kWe nett Transient frequency deviation % Frequency recovery time seconds Prime power % Load kWe nett Transient frequency deviation % Frequency recovery time seconds 4012-46TWG4A 70 840 ≤ 10 5 30 360 ≤ 10 5 The above figures were obtained under test conditions as follows: Engine block temperature .. ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... . 45 °C Ambient temperature . ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... . 15 °C Governing mode ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... .. Isochronous Alternator inertia. ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... . 50 kgm² Under frequency roll off (UFRO) point set to ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... 1 Hz below rated UFRO rate set to ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... 2% voltage / 1% frequency LAM on / off ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... .. on All tests were conducted using an engine installed and serviced to Perkins Engines Company Limited recommendations. Applied load is a percentage of generator electrical output efficiency as published in the general installation section of this data sheet. The information given on this Technical Data sheet is for standard engines, and for guidance only. For ratings other than those shown contact Perkins Engines Company Limited, Stafford. Distributed by Perkins Engines Company Limited Peterborough PE1 5NA United Kingdom Telephone +44 (0) 1733 583000 Fax +44 (0) 1733 582240 www.perkins.com All information in the document is substantially correct at the time of printing but may be subsequently altered by the company. Publication No. TPD1703E, Issue 8. January 2012 © Perkins Engines Company Limited. Initial load acceptance when engine reaches rated speed (15 seconds maximum after engine starts to crank)