Overview#
The Cummins C175 D6 (model designation C175D6D) is a 175 kW standby diesel generator set built on the QSB7-G5 engine -- a 6.7-liter, inline-6-cylinder turbocharged and charge-air-cooled industrial diesel running at 1800 rpm. Rated at 218.7 kVA standby and 196.8 kVA prime at 60 Hz, the C175D6D sits in the middle of the QSB7-based range between the C150D6D and C200D6D. All three models share the same engine block with different ECM calibrations for their respective power outputs.
Standard equipment includes the PowerCommand 1.1 control with integrated voltage regulation and a sound-attenuated aluminum enclosure. The unit is EPA Tier 3 certified for stationary emergency standby applications. The QSB7-G5 engine features a Holset HX35 wastegated turbocharger, Bosch high-pressure common rail fuel injection, and a 24-valve cylinder head design for improved fuel efficiency and transient response.
The C175D6D is designed for mid-size commercial standby applications including hotels, office complexes, and light-industrial facilities that require more than 150 kW but less than 200 kW of emergency power capacity.
Our Service Experience#
The QSB7-G5 at 175 kW is moderately loaded relative to its 200 kW maximum standby rating. This is a comfortable operating point for the engine with good thermal margins. The high-pressure common rail fuel system requires clean fuel -- we recommend fuel polishing on units exercised less than weekly. The Fleetguard spin-on fuel filters with integral water separator should be serviced at every 500-hour interval. At 175 kW, the charge air cooler is working harder than on the C150 variant, so annual pressure testing is recommended.
Frequently Asked Questions#
What fuel consumption should I expect from the C175D6D? Based on the QSB7-G5 engine spec sheet, standby fuel consumption at full load is approximately 14 gallons per hour. At 50% load, consumption drops to approximately 7.5 gallons per hour. Actual consumption varies with load profile, ambient conditions, and altitude.
Is the C175 D6 available without a sound enclosure? The C175D6D is typically supplied with a sound-attenuated aluminum enclosure. Open-skid configurations may be available for indoor installations -- contact your Cummins distributor for options.
