Oil and Gas

6CM20C

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Overview

The 6CM20C 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 6CM20C 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 6CM20C offshore generator set.

Engine Specifications

Units:
Minimum Rating 1230.0 kV·A 980.0 ekW Less
Maximum Rating 2050.0 kV·A 1640.0 ekW Less
Emissions IMO Tier II IMO Tier II Less
Aspiration Turbocharged-Aftercooled Turbocharged-Aftercooled Less
Bore 7.87 in 200.0 mm Less
Displacement 3442.0 in³ 56.0 l Less
Engine Control Electronic Electronic Less
Generator Set Control Electronic Electronic Less
Stroke 11.81 in 300.0 mm Less
Weight 41446.0 lb 18800.0 kg Less

Dimensions

Height 126.7 in 3218.0 mm Less
Length 239.1 in 6073.0 mm Less
Width 66.14 in 1680.0 mm Less

Engine Design

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

Ease of Installation

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

Packaging Concept

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

Improved Serviceability

- Large inspection openings allow for convenient access to core engine internals for easier serviceability - Core engine components designed for reconditioning and reuse at overhaul - Worldwide dealer network with factory-trained technicians means that parts and support are never out of reach - Simplified parts spectrum by using single-pipe exhaust gas ducting

Web Site

For all your petroleum power requirements, visit www.catoilandgasinfo.com

6CM20C 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, for manual 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 /stop key, speed setting device, mechanical shutdown device, change over of control functions from engine to remote control
  • Starting solenoid valve on engine, 24 V DC
  • Separate electronic speed governor

Monitoring for Unattended Operation
  • 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 inlet Switches 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 back flushing filter - Set of thermocouples after each cylinder, before and after turbocharger - Crankcase oil mist detector Control Cabinet with housings for wall mounting, including: - Protection equipment designed for automatic and manual stop input signals, starting interlock input signals, monitoring for the wire break of the input signal units and the emergency shutdown solenoid - Speed recording system for overspeed, firing speed and minimum speed - Start /stop logic, controlled by engine automatic start (optional) - Service hour counter - Optional Noris alarm system, cassette type, designed for alarm inputs for the engine including exhaust mean-value monitoring equipment as well as alarm inputs for the propulsion plant - Optional Group alarm panel for the bridge and with optional and 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 the vertical 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
  • LT 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
  • 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
  • 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 and nozzle 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