According to Caterpillar, the new Cat® C6.6 ACERT® generator set combines proven design and manufacturing expertise with the latest ACERT technology to provide state-of-the-art performance, fuel economy, emissions compliance and electronic control.
With six different ratings from 100 to 170kWe, at 1,500rpm (50Hz) or 1,800rpm (60Hz), the C6.6 fills the gap between existing Cat C4.4 and Cat C9 generator sets.
The Cat C6.6 ACERT is the latest in a new range of compact generator sets designed to offer ease of installation and long service intervals. The C6.6 is IMO-compliant with its 60 Hz ratings meeting EPA Tier 2 and its 50 Hz ratings meeting EU 97/68EC Stage II and CCNR Stage II emission regulations.
With its robust set-up, the Cat C6.6 ACERT is aimed mainly at commercial marine users.
A heavy-duty air cleaner and glow plugs to aid starting in cold weather support operation in harsh environments. Three different cooling options, namely radiator cooling, keel cooling and seawater after-cooling, provide maximum flexibility. MCS-certified and ready-to-install C6.6 packages with complete documentation are available straight from the factory. These packages incorporate all type-approved alarms and shutdowns and meet the requirements for manned and unmanned engine room applications, including emergency applications.
The Cat C6.6 ACERT generator set uses an in-line, four-stroke, 6.6-litre diesel engine, which is electronically governed, turbo-charged and after-cooled. Its redesigned engine block reduces noise and vibration while a four-valve cylinder head improves efficiency. The engine drives a brushless three-phase generator, separately excited from auxiliary winding (AREP) and capable of producing 300% short circuit current for up to 10 seconds if needed. Engine and generator are resiliently mounted on a common base frame.
The C6.6 utilises a modern common-rail fuel system with a closely optimised air-management system, both overseen by the latest generation of ACERT engine control. In the fuel system, variable multi-shot injection combines with a high compression ratio for optimised fuel efficiency and very low smoke operation. Other improvements involve the combustion system and the manifold as well as the high-efficiency turbocharger.
The Cat C6.6 ACERT is designed for fail-safe operation in unmanned engine rooms. The sea water and jacket water pumps are gear-driven and there are safety shutdowns for low oil pressure, high water temperature and overspeed. Utilising a closed crankcase ventilation system, evaporation of crankcase fumes is prevented.
