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Mitsubishi Diesel Engine Generators (Year 2008)

Model: S12R-PTA (1250 kVA, 3300V, 50Hz) 1. Condition

Operating Condition: Engine starts within 40 seconds after Automatic Start ordered. Lubricating Oil must be

supplied as required.

Installation: Outdoor

Ambient Temperature: -5 to 40 degrees C

Relative Humidity: less than 80%

Altitude: Lower than 300 meters above sea level

Seismic Qualification: Horizontal 1.0G, Vertical 0.5G

2. Diesel engine

(1) Engine Main Items

Type: 4 Cycle, Water-Cooled direct injection, V-shaped Turbo system, Air-cooling machine

Model: Mitsubishi S12 R-PTA

Num. of cylinder: 12

Bore x Stroke: 170mm x 180mm

Engine Total

Displacement : 49.03 L

Power/RPM: Nominal Output 1,080 kw/1,500 min-1

Net brake mean

effective pressure: 1.76 MPa (at Nominal Output)

Mean piston speed: 9. 0m/s

Applicable Fuel: Bunker A

Fuel consumption rate: 0.207 kg/kw h +5% margin (rated output)

Lubricating oil: API CD class, SAE number 30, inventory 180L

Lubricating oil

consumption: Approx. 1. 0 L/h (rated output)

Cooling type: Radiator-Water Cooled system

Cooling water: Freshwater + antifreeze (non-amine)30% mixed water

Cooling water capacity: Approx. 280L( Engine: 125 L, Radiator: 135L, Others: 20L )

Speed fluctuation rate: at Stabilization less than 5 %, at instant less than 10 %

Rotation direction: CCW from the flywheel side

Engine dimension: (excluded auxiliary equipment) L 2,320mm W 1,360mm H 1,565mm

Engine weight: Dry 4,800kg, in Operation 5,090kg

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(2)Individual Equipment Items

a) Fuel system

Filter: Paper element type

Supply pump: Push piston

Injection pump: (2) Mitsubishi PS6

Injection valve: BOSCH hole nozzle

Governor: Electric type, Constant speed, Governor control box (in the engine hood)

b) Lubricating oil system

By the wet sump, install a 150L's oil pan under the crank case and engine parts are lubricated by the engine drive

gear pump forcibly.

Pump: Engine drive gear type, with relief valve, Discharge volume 4.80L/min Discharge

pressure 0.4 to 0.65 MPa

Cooler: Fresh water cooling-multiplate type, with thermoregulation valve

Filter: Paper element type, with DP alarm switch

Priming pump: 3P 200 V 1.5 kw

c) Air supply system

Supercharger: Mitsubishi Radial flow exhaust turbine, Boost pressure: 0.17 MPa, Speed: 64,000

min-1, Max. Speed: 72,000 min-1

Air cleaner: Turbine silencer

Air cooler: Fresh water cooling-multiplate type

d) Cooling System

The cooling method is radiator cooling type using fresh water. The engine side coolant circulates by the water

pump of the engine drive and when it is cold, bypass the radiator with the thermostat which is installed in the

engine.

Engine side pump: Engine driving, Centrifugal spiral type, Capacity 1,650L/min (at the discharge

pressure 0. 14 MPa)

Thermostat: When cooling water temperature is less than 71 degrees C, bypass the coolant and

prevent the supercooling of the engine

Water heater: (2)3P 200 V 2 kW (Thermostat switch control)

e) Starting system

Electrical starting by starter

Starter: DC24 V, (2)7.5 kW, Relay of reclosing preventive device , Relay of non-gear

preventive device

Battery: DC24 V HS-400EX12 (in the engine hood)

f) Shutdown system

Shutdown solenoid: DC24 V 15 A (Fuel cutoff by exciting coil)

Manual Shutdown: by manual lever

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3. Three-phase AC synchronous generator Type: NTAKL-SEK

Rating: Sequence

Rated output: 1,250 kVA(1,000 kw)

Number of pole: 4P

Speed: 1,500 min-1

Voltage: 3,300 V

Current: 219 A

Frequency: 50 Hz

Power factor: 0.8 PF(lagging)

Excitation system: Brushless system(shunt winding) by AC exciter, Automatic voltage regulator (in the

generator BOX)

Connection: Star, 3 phase 3 line, Neutral grounding

Rotate Direction: CCW from the anti-direct connection side

Terminal drawer

direction: Top right from the anti-direct connection side

Bearing type: One side rolling bearing

Insulation: Stator winding F type, Rotor winding F type

Specification: JEC-2130-2000

Direct engine: Diesel engine

4. Dimension&Weight 6,535L x 3,350W x 3,820H mm

In Dry : 18,000 kg, In Operation 18,450 kg

5. Remarks

The System is originally designed for parallel operation by two generators. The individual Lot can be operated by

stand-alone, and each lot includes single operation-board which is removed from the master board for parallel

Operation. One side of each single operation-board requires the additional safety-cover.