Description
A Cummins quiet diesel generator combines a Cummins industrial engine with a fully enclosed, sound-attenuated canopy - delivering the reliability and performance Cummins engines are known for, while significantly reducing operating noise for use in residential-adjacent, commercial and noise-sensitive environments.
At a Glance
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Cummins quiet diesel generator |
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Engine Brand |
Cummins |
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Power Range |
40kW–800kW+ (multiple Cummins engine series available) |
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Enclosure Type |
Fully sound-insulated canopy |
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Rated Frequency |
50Hz (60Hz configurable) |
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Voltage |
400/230V standard, customizable |
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Power Factor |
0.8 |
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Emissions |
Meets EU2/EU3/EPA/CARB depending on model |
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Altitude Adaptability |
Reliable operation up to 1525m without derating |
Built on a Cummins Platform, Engineered for Quiet Operation
The core of this generator is the same Cummins engine platform used across our open-frame lineup - a PT fuel system with precise low-pressure fuel delivery and high-pressure injection (100–140MPa), direct injection turbocharging, and Holset-brand exhaust turbochargers for strong performance across varying loads. What changes is the housing: instead of an exposed frame, the engine, alternator and control panel are enclosed in a sound-insulated canopy designed to cut noise output while maintaining the same power performance and reliability.
The table below shows confirmed engine specifications from our Cummins open-frame platform - the same engine data applies to the quiet enclosure version, though enclosure-specific dimensions and weight will run higher than the open-frame figures due to the added canopy structure.
Cummins Engine Parameters (Base Platform)
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Model |
Power (kW/kVA) |
Rated Current |
Engine Model |
Cylinders |
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MST-40SIII |
40/50 |
72A |
4HTAA4.3-G31 |
4/L |
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MST-50SIII |
50/62.5 |
90A |
4HTAA4.3-G32 |
4/L |
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MST-64SIII |
64/80 |
115.2A |
4HTAA4.3-G33 |
4/L |
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MST-80SIII |
80/100 |
144A |
4HTAA4.3-G34 |
4/L |
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MST-90SIII |
90/112.5 |
162A |
4HTAA4.3-G35 |
4/L |
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MST-110SIII |
110/137.5 |
198A |
4HTAA4.3-G36 |
4/L |
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MST-160SIII |
160/200 |
288A |
6DTAA8.9-G31 |
6/L |
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MST-200SIII |
200/250 |
360A |
6DTAA8.9-G33 |
6/L |
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MST-250SIIL |
250/312.5 |
450A |
6ETAA11.8-G32 |
6/L |
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MST-300SIII |
300/375 |
540A |
6ETAA11.8-G31 |
6/L |
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MST-400SIII |
400/500 |
720A |
12GTAA27-G34 |
12/V |
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MST-500SIII |
500/625 |
900A |
12GTAA27-G31 |
12/V |
Full range extends beyond this table up to 800kW+. Enclosed/quiet-version dimensions and weight are confirmed at quotation stage based on your selected power rating.
How the Sound-Insulated Enclosure Works
Four elements combine to reduce operating noise without compromising engine cooling or performance:
Multi-layer acoustic panels line the interior of the enclosure, absorbing engine and mechanical noise before it radiates outward.
01
Baffled intake and exhaust channels allow full airflow for cooling while disrupting the direct path sound waves would otherwise travel through.
02
Vibration-isolating mounts decouple the engine and alternator from the frame, reducing structure-borne noise transmission.
03
Fully sealed cabinet construction contains noise on all sides - a meaningful difference from open-frame units, where noise radiates freely in every direction.
04
The result is a generator suited to locations where an open-frame unit's noise level would be disruptive or non-compliant with local noise ordinances.
Who Specifies a Quiet Diesel Generator
Hotels & hospitals
Backup power that won't disturb guests or patients, especially for units installed near occupied areas
01
Commercial & office buildings
Discreet backup power in urban or mixed-use settings with noise restrictions
02
Telecom & data center operators
Continuous, low-noise power for facilities in populated areas
03
Construction contractors
Projects in residential-adjacent zones or under local noise ordinance restrictions
04
Equipment rental companies
Units serving events, film productions or venues where quiet operation is a hard requirement
05
Quiet Enclosure vs. Open Frame - Quick Comparison
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Quiet (Enclosed) |
Open Frame |
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Noise Output |
Significantly reduced |
Higher, unshielded |
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Weather Protection |
Fully enclosed, weatherproof |
Requires separate shelter for outdoor use |
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Footprint |
More compact, all-in-one |
Requires more installation planning |
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Cost |
Higher (enclosure adds cost) |
Lower base cost |
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Best For |
Noise-sensitive or public-facing sites |
Industrial sites where noise isn't a concern |
Backed by 25 Years of Manufacturing
Milestone (Hebei Xiong'an) Technology Co., Ltd. is based in Baoding City, Hebei Province, China, and has been engaged in the generator set industry for over 25 years - integrating R&D, production, sales and service under one roof. Every unit goes through multi-dimensional quality inspection before delivery, in line with international standards and industry norms. We've exported to more than 110 countries and regions, backed by a one-stop service model covering technical consultation, customized design, installation commissioning and after-sales support.
Before You Request a Quote
A few details that speed up getting you an accurate configuration:
- Required power rating (kW or kVA)
- Whether the unit needs to run prime (continuous) or standby (backup) power
- Any local noise ordinance limit (dB at a specified distance), if known
- Voltage/frequency requirement for your region
- Whether an ATS (automatic transfer switch) is needed for unattended switching
Send these details with your inquiry and our technical team can confirm engine model, enclosure spec and lead time directly.
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