17.290,33 €
Length: 94 inches
Width: 34 inches
Height: 45.5 inches
Weight: 1356 lbs
The Cummins 40kW Generator Quiet Connect Liquid Cooled 120/240 Volt 3 Phase is engineered for dependable standby power in demanding environments. Designed for commercial facilities, industrial operations, and large residential properties, this generator delivers consistent performance using a robust Cummins engine and advanced control systems.
Reliable backup power is critical for businesses that cannot afford downtime. The Cummins RS40 generator provides 40kW of dependable standby energy while operating quietly and efficiently. Built with a liquid cooled system, a durable aluminum enclosure, and Cummins’ PowerCommand control technology, this generator ensures seamless operation during outages.
Cummins has long been recognized for producing durable power solutions used worldwide in healthcare facilities, manufacturing plants, and critical infrastructure. The Quiet Connect series continues that legacy with high-efficiency standby generators designed for long service life and low maintenance requirements.
The Cummins 40kW Generator Quiet Connect Liquid Cooled 120/240 Volt 3 Phase is designed for reliable standby power generation with minimal noise and maximum efficiency.
Key highlights include:
Rated Output: 40kW standby power
Voltage: 120/240 volts 3-phase
Engine: 2.4-liter Cummins turbocharged inline 4-cylinder
Cooling System: Liquid cooled for extended runtime
Fuel Options: Natural gas or propane
Noise Level: Approximately 68 dBA
Control System: PowerCommand 1.1 electronic control
This generator is capable of handling demanding electrical loads and maintaining stable voltage output even during fluctuating demand.
For businesses requiring larger capacity systems, you may also compare it with the
Cummins Quiet Connect 150kW Generator which provides significantly higher power output for large facilities.
The Cummins RS40 generator is built using heavy-duty components engineered for durability and long operational life.
At the heart of the generator is a 2.4-liter turbocharged Cummins engine running at 1800 RPM. Operating at this speed improves efficiency and reduces engine wear compared to higher-RPM generators.
Engine features include:
Inline 4-cylinder design
Turbocharged and aftercooled system
Cast iron engine block
Liquid cooling system
Reliable cold weather starting
This design allows the generator to maintain stable output while operating for extended periods during prolonged outages.
The generator uses a brushless 4-pole alternator with revolving field design. This system ensures stable voltage output and improved efficiency while reducing maintenance requirements.
Key benefits:
Automatic voltage regulation
Improved efficiency under load
Reduced mechanical wear
High durability for continuous standby applications
A liquid cooled standby generator offers several important advantages compared to air-cooled models.
Liquid cooling systems regulate engine temperature more effectively, allowing the generator to operate longer without overheating.
Benefits include:
Stable operating temperature
Longer runtime capability
Reduced engine stress
Increased durability
Liquid cooled generators are typically used for higher-capacity standby systems, including commercial backup power applications.
This makes the Cummins 40kW generator suitable for:
Large residential properties
Commercial buildings
Data centers
Agricultural operations
Small industrial facilities
The Cummins Quiet Connect generator series is specifically designed to provide dependable standby power with minimal noise.
The enclosure provides excellent sound reduction while protecting the generator from environmental conditions.
Features include:
Powder-coated aluminum construction
Corrosion resistance
Weather protection
Noise reduction to approximately 68 dBA
This makes the generator suitable for installations near residential or commercial spaces where noise control is important.
The enclosure is designed to withstand wind loads up to 180 MPH, meeting engineering standards for structural durability.
The PowerCommand 1.1 control system is one of the most advanced generator control technologies available.
It provides:
Real-time monitoring
Automatic generator start and stop
Fault detection and diagnostics
Voltage and frequency regulation
System status monitoring
The control panel includes a backlit LED display, allowing operators to monitor system performance and identify potential issues quickly.
Advanced diagnostic capabilities reduce maintenance downtime and help ensure reliable generator operation.
The Cummins 40kW generator supports two fuel types:
Natural gas
Liquid propane (LP)
Fuel selection is configured during installation, allowing users to choose the most convenient or cost-effective option.
Approximate fuel usage includes:
Natural Gas:
Half load: 304.7 cubic feet per hour
Full load: 519 cubic feet per hour
Propane:
Half load: 3.4 gallons per hour
Full load: 5.4 gallons per hour
Natural gas is often preferred for permanent installations due to continuous supply availability.
The generator requires installation on a prepared concrete slab and must be paired with an automatic transfer switch (ATS).
Recommended transfer switches include:
Cummins RA series
Cummins RSS series
Cummins OTEC ATS
These systems allow the generator to automatically detect utility outages and start power production within seconds.
For facilities requiring higher three-phase capacity, consider the
Cummins RS150 Quiet Connect 150kW Generator, designed for large industrial operations.
Selecting the right generator requires evaluating power needs and installation conditions.
List essential equipment that must operate during outages:
HVAC systems
refrigeration units
lighting circuits
office equipment
security systems
A 40kW standby generator typically supports medium-size commercial facilities.
Natural gas is ideal for:
urban locations
commercial buildings
continuous fuel supply
Propane may be better for rural installations.
Ensure sufficient space for:
ventilation
maintenance access
safe exhaust routing
Many industries rely on Cummins generators due to their engineering reliability.
Hospitals, data centers, and industrial plants depend on Cummins standby power systems because they are designed for critical applications where power loss is unacceptable.
Key advantages include:
Industry-leading reliability
global service network
long engine lifespan
advanced control systems
For example, companies needing mid-range backup capacity often compare this unit with the
Cummins Power Quiet Connect 60kW Generator, which offers higher output while maintaining the same Quiet Connect technology.
General
Model: RS40 / A051Y421
Rated Power: 40kW
Voltage: 120/240V 3-phase
Frequency: 60 Hz
Decibel Rating: 68 dBA
Certification: UL-2200
Engine
Engine Type: Cummins 2.4L Inline 4-Cylinder
Turbocharged & Aftercooled
RPM: 1800
Cooling System: Liquid cooled
Alternator
Brushless revolving field design
Automatic voltage regulation
4-pole alternator
Dimensions
Length: 94 inches
Width: 34 inches
Height: 45.5 inches
Weight: 1356 lbs
The Cummins 40kW Generator Quiet Connect Liquid Cooled 120/240 Volt 3 Phase is a powerful and reliable standby solution designed for commercial and industrial power backup. With its durable Cummins engine, advanced PowerCommand control system, and quiet aluminum enclosure, this generator delivers dependable performance during power outages.
Whether installed at a commercial facility, agricultural property, or large residential site, the Cummins RS40 generator provides consistent power output, efficient fuel consumption, and long-term reliability.
Businesses that require dependable backup power often rely on Cummins generators because they are engineered to operate in demanding conditions while maintaining exceptional performance.
The Cummins RS40 generator produces 40kW of standby power, suitable for commercial buildings, large homes, and small industrial facilities.
Yes, the generator uses a liquid cooling system, allowing it to run longer and maintain stable operating temperatures.
It can operate on natural gas or propane, depending on installation configuration.
The generator operates at approximately 68 dBA, making it significantly quieter than many standby generators.
Yes. When connected to an automatic transfer switch, it starts automatically when utility power fails.
It uses Cummins PowerCommand 1.1, which provides system monitoring, diagnostics, and automatic operation.
Yes. It is equipped to start in temperatures as low as -40°F when properly configured.
The generator includes a Cummins 2-year limited warranty, with optional extended coverage available.
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