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Overview

The 9CM20C 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 9CM20C 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.

Engine Specifications

Units:
Minimum Rating 4023.0 kVa 1530.0 ekW Less
Maximum Rating 3600.0 kVa 1710.0 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 57320.0 lb 30.0 t Less
Stroke 11.81 in 300.0 mm Less
Bore 7.87 in 200.0 mm Less
Displacement 5163.0 in3 85.0 L Less

Dimensions

Length 280.5 in 7125.0 mm Less
Height 133.4 in 3389.0 mm Less
Width 71.5 in 1816.0 mm 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 semisubmersible rigs and drillships - Compact cylinder head design - Nodular cast-iron block with integrated ducts for lubricating oil and charge air - Segmental camshaft design - 25° tilt capability in all directions - Engine design based on the higher requirements of heavy fuel oil - High efficiency turbocharger - Cylinder liner, only cooled outside the engine block - Engine control terminal with analog instrumentation in robust cast casing n Connecting rod, oblique split design - Compact module for lower valve drives and injection pump drives with cam followers - 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

9CM20C 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
  • 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 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
  • LT 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
  • 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 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