8CM20C

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Overview

The 8CM20C generator set brings to the offshore industry a legacy of proven reliability and durability in the marine industry. CM offshore generator sets feature standard modular designs, engine-mounted pumps and filters, and a full range of factory attachments that make their installation simple and efficient.Ideal applications for the 8CM20C offshore generator sets are main power on-board production vessels and platforms.Complete package offerings are MCS type-approved and compliant with IMO Tier II emissions standards, making their integration into vessels and platforms a simplified operation.Cat generator sets are backed by the worldwide network of Cat dealers ready to support your operation with technical support, service, parts, and warranty.Cat 8CM20C offshore generator set. Ratings: 1310-1460 ekW (1640-1830 kVA) @ 50/60 Hz (1000/900 rpm). IMO Tier II emissions compliant.

Engine Specifications

Units:
Minimum Rating 1640.0 kVa 1310.0 ekW Less
Maximum Rating 1830.0 kVa 1460.0 ekW Less
Emissions IMO Tier II IMO Tier II Less
Aspiration Turbocharged-Aftercooled Turbocharged-Aftercooled Less
Engine Control Electronic Electronic Less
Generator Set Control Electronic Electronic Less
Weight 50926.0 lb 23100.0 kg Less
Stroke 11.81 in 300.0 mm Less
Bore 7.87 in 200.0 mm Less
Displacement 4589.0 in3 75.0 L Less

Dimensions

Length 267.6 in 6798.0 mm Less
Height 174.7 in 3389.0 mm Less
Width 99.8 in 1816.0 mm Less

Capacity for Liquids

Cooling System (Engine) 69.0 gal 260.0 L Less
Lube Oil System (Refill) 740.0 gal 2800.0 L Less

Engine Design

- World-class reliability and durability– Incorporates years of proven component reliability and– durability in marine industry- Medium speed long-stroke engine design-Ideal configuration for dynamically positioned semisubmersiblerigs and drillships- Compact cylinder head design- Nodular cast-iron block with integrated ducts for lubricatingoil and charge air- Segmental camshaft design- 25° tilt capability in all directions- Engine design based on the higher requirements of heavyfuel oil- High efficiency turbocharger- Cylinder liner, only cooled outside the engine block- Engine control terminal with analog instrumentation inrobust cast casing- Connecting rod, oblique split design- Compact module for lower valve drives and injection pumpdrives with cam followers- Flexible Camshaft Technology (FCT)

Ease of Installation

- Standard modular design allows for ease of installation andreduced complexity- Installation-friendly, due to pumps and filters installed onthe enginen Cooling water system with simple plug-in connections-Full range of factory-installed engine attachments allowscustomization and reduction in installation time

Packaging Concept

Assembled, tested, and validated as a package to minimizepackage vibration and maximize component life

Improved Serviceability

- Large inspection openings allow for convenient access tocore engine internals for easier serviceability- Core engine components designed for reconditioning andreuse at overhaul- Worldwide dealer network with factory-trained techniciansmeans that parts and support are never out of reach- Simplified parts spectrum by using single-pipe exhaustgas ducting

Web Site

For all your petroleum power requirements, visitwww.catoilandgasinfo.com

8CM20C Standard Equipment

Engine
  • – Motor-driven barring gear, fitted on engine
  • – Reversing contractor and pushbutton switch with cable
  • – Electronic speed setting equipment with actuator and speed pick-up
  • – Emergency shutdown equipment with pushbutton, separate, formanual emergency stop

Engine Indicators
  • – Gauge board with set liquid damped pressure gauges for:fuel, lubricating oil, fresh water, starting air, and charge air.
  • – On-engine thermometers for fuel, lubricating oil, fresh water,and charge air
  • – Electric remote speed indicator
  • – Turbocharger and remote speed indicator
  • – Exhaust gas temperature indicator

Control
  • – Manual control on engine, including: control panel with start /stopkey, speed setting device, mechanical shutdown device, change overof control functions from engine to remote control
  • – Starting solenoid valve on engine, 24 V DC
  • – Separate electronic speed governor

Monitoring for Unattended Operation
  • Pressure switches, mounted on engine, for:– Lube oil pressure at full load below danger level– Low lube oil pressure– Lube oil pressure below danger level– Lube oil pressure prelubrication failed– Low fresh water pressure at engine inlet– Fresh water pressure at engine inlet below danger level– Low fresh water pressure in LT circuit– Low starting air pressure– Low control air pressure engine/shutdown air pressure– Low fuel pressure at engine inletSwitches for:– High lube oil temperature at engine inlet– Lube oil temperature at engine inlet above danger level– High water temperature at engine inlet– Water temperature at engine outlet above danger level– High charge-air temperature at engine inlet– Detection of water in charge-air duct– Leak fuel level– Alarm contact for high differential pressure at fuel filter– Alarm contact for high differential pressure at lube oil backflushing filter– Set of thermocouples after each cylinder, before and afterturbocharger– Crankcase oil mist detectorControl Cabinet with housings for wall mounting, including:– Protection equipment designed for automatic and manual stop inputsignals, starting interlock input signals, monitoring for the wire breakof the input signal units and the emergency shutdown solenoid– Speed recording system for overspeed, firing speed and minimumspeed– Start /stop logic, controlled by engine automatic start (optional)– Service hour counter– Optional Noris alarm system, cassette type, designed for alarminputs for the engine including exhaust mean-value monitoringequipment as well as alarm inputs for the propulsion plant– Optional Group alarm panel for the bridge and with optionaland acoustic alarm equipment

Starting Air System
  • – Separate non-return valve for the starting air pipe to the engine

Air Intake System
  • – Air intake filter, fitted on the turbocharger
  • – Air bottles, separate

Diesel Oil System
  • – Circulating pump fitted on engine
  • – Duplex filter with differential pressure indication

Exhaust System
  • – Turbocharger at free end with transition nozzle (0 degrees from thevertical and away from engine), with compressor cleaning device
  • – Expansion joint separate
  • – Separate silencer and spark arrester, unlagged 35 dB(A)

Fresh Cooling Water System
  • – HT pump, fitted on engine
  • – HT pump, fitted on engine
  • – HT thermostat, not powered and separate
  • – Engine preheating equipment, fitted on base frame

Lubricating Oil System
  • – Plate cooler, fitted on engine
  • – Force pump, fitted on engine
  • – Prelubrication pump, fitted on base frame, electric motor driven
  • – Plate cooler, fitted on engine– Force pump, fitted on engine– Prelubrication pump, fitted on base frame, electric motor driven– Boll and Kirch automatic backflushing filter, fitted on engine
  • – Pressure control valve, fitted on engine

Connecting Parts – Engine
  • – Set of connecting parts between flange coupling and flywheel
  • – Flexible flange coupling between engine and generator
  • – Base frame with flywheel guard and incorporating lube oil sump tank,for engine and generator
  • – Mounting of engine and generator on the base frame
  • – Set of bonded rubber rails for resilient mounting of the base frame
  • – Set of flexible pipe connections

Tools
  • – Set of tools for the engine including hydraulic tightening tools andnozzle tester
  • – Set of tools for turbocharger
  • – Inside micrometer for cylinder liners
  • – Ruler for cylinder liner

Spare Parts
  • – Set of engine spare parts for unrestricted operation
  • – Set of spare flexible pipe connections

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