Generator Noise Levels: Understanding dBA Ratings

What Is Wet Stacking and How Do You Prevent It?

Resources

20 kW Enclosed
Diesel Generator

PTI-20SI

Discover unparalleled power with the PTI-20SI, a 20 kW enclosed diesel generator renowned for its robust performance in commercial settings. Engineered for quiet operation, this mobile generator is the ultimate choice for those prioritizing reliability and silence. With customizable features, it offers tailored solutions to meet diverse engineering needs, serving as the optimal foundation for crafting your ideal power solution.

Features

Upgrade your 20 kw generator

with Add-ons

Explore a broad spectrum of enhancements for your tailor-made generator at PowerTech. Our collection of add-ons significantly elevates the efficiency and performance of your personalized power solution. Whether it’s for a specialty vehicle or a custom trailer, our dedicated sales and engineering team is ready to assist you in selecting the most suitable enhancements to meet your unique needs.

Slide Rack

remote control panel

Remote Radiator

fuel Tank

PTI-20SI Airflow

The PowerTech PTI-20SI quiet enclosed 20 kW diesel generator features an efficient airflow system designed to optimize performance, even in challenging, warm climates. This system draws air from the base pan of the generator, where it is filtered and directed through the engine compartment. As the air passes through, it helps cool vital components before being expelled through the radiator side of the unit. This design ensures that hot air is effectively vented away from sensitive areas, preventing overheating and maintaining steady operation under load. The air circulation system is a hallmark of the PowerTech lineup, offering enhanced cooling efficiency and reliability in mobile power generation, especially in high-temperature environments.

Genset Information

Weight: 952 LBS
Overall Dimensions: 49 11/16″L X 27 1/2″W X 30 9/16″H, Risers + 2 1/2″ H
Fuel Type: Ultra-Lw Sulfur Diesel (ULSD)
Fuel Consumption: Full Load 2.3 GPH, Half Load 1.2 GPH
Fuel Lift Pump: Genset Mounted, Electric, 18″-24″ Max Vertical Lift
Service Interval: 250 Hours
Engine Coolant: Dex-Cool, Ethylene Glycol, 50/50, 10 QTs
Engine Oil: 15W-40, 8 QTs
Engine Electrical System: 12VDC
Starting Battery, 12V 500 CCA, Min. (Battery Not Included with Generator Set)
Fuel Bulkhead Fittings: 1/4″ NPT
Fuel Lines: Supply 3/8″, Return 3/8″
Exhaust Outlet 2″ NPT

Disclaimer: Weights and dimensions shown may vary and are for guidance only. Please confirm with your PowerTech Sales Representative before ordering.

Engine Specification

Make: Isuzu
Model: 4LE2T
Engine Type: Diesel, 4 Stroke
Configuration: Vertical In-Line, OHV, Liquid Cooled
Cylinders: 4

Generator End Specifications (Single Phase)

Type: Synchronous A/C Generator
Exciter Type: Self-Excited, Brushless, AVR Equipped
Rotor Support: Single Bearing
Frame Type: Open
Cooling: Fan Cooled
Insulation Class: H
Winding Pitch: 2/3
Ambient Temperature: 40 C
Temperature Rise 125 C
Service Rating: Continuous
Voltage: 240VAC
Frequency: 50/60 Hz
Power Factor 1.0
Phase: 1
Number of Poles: 4
Number of Leads: 4
Voltage Regulation: +/- 1%
Harmonic Distortion: <4%
Loading Recovery Time: <500 msec
Load Imbalance Allowed 25% (Maximum)

Generator End Specifications (Three Phase)

Type: Synchronous A/C Generator
Exciter Type: Self-Excited, Brushless, AVR Equipped
Rotor Support: Single Bearing
Frame Type: Open
Cooling: Fan Cooled
Insulation Class: H
Winding Pitch: 2/3
Ambient Temperature: 40 C
Temperature Rise 125 C
Service Rating: Continuous
Voltage: 480VAC
Frequency: 50/60 Hz
Power Factor 0.8
Phase: 3
Number of Poles: 4
Number of Leads: 12
Voltage Regulation: +/- 1%
Harmonic Distortion: <4%
Loading Recovery Time: <500 msec
Load Imbalance Allowed 25% (Maximum)

Main Circuit Breaker

Number of Poles: 3
Trip Type: Fixed Thermal, Fixed Magnetic
Max Rated Voltage: 600VAC
Interrupt Rating 18kAIC@ 240VAC, 14kAIC @480VAC
Frequency Rating: 50/60 Hz
Direct Short Trip Time: 10 msec

Generator Power Output at 60Hz - 20kw

Phase	Power Factor	Voltage	Amps
1	1.0	120	166
1	1.0	120/240	166/83
3	0.8	120/208	69
3	0.8	277/480	30

Generator Power Output at 50Hz - 16.6kW

Phase	Power Factor	Voltage	Amps
1	1.0	220	75
1	1.0	230	72
3	0.8	219/380	31
3	0.8	231/400	30

Generator controller Specifications

Make: Dynagen
Model: TG 600
Display: 4.3″, Color, Sunlight Readable
Moisture Resistance: IP67
Communication: CAN Bus J1939, RS-485 (Modbus)
Switched Inputs: 12
Switched Outputs: 10
Analog Inputs: 10

Standard Controller Monitoring and Shutdown

System	Warning	Shutdown
Oil Pressure	X	X
Coolant Temperature	X	X
Coolant Level		X
Fuel Filter Restriction	X
Air Filter Restriction	X
Generator Voltage	X	X
Generator Frequency	X	X
Generator Over Current	X	X
Engine Speed	X	X

Generator Decibel Level

dB Level	Location	Distance	Generator Load
71.0	Service Side	7 Meters	1/2 Load
77.0	Radiator End	7 Meters	1/2 Load
71.4	Non-Service Side	7 Meters	1/2 Load
71.7	Generator End	7 Meters	1/2 Load

Relative Decibel Level Information

dB Level	Pressure Rise in Pa	Source
180+	20,000	Space Shuttle Launch
160-179	2,000	NHRA Dragster
140-159	200	Jet Engine, Fireworks
120-139	20	Rock Concert, Police Siren
100-119	2	Lawn Mower, Helicopter
80-99	0.2	Semi-Truck, Hair Dryer
60-79	0.02	Normal Conversation, City Traffic
40-59	0.002	Whispering
20-39	0.0002	Quiet Bedroom
0-19	0.00002	Hearing Threshold

Generator options

Exhaust Exit Down
Exhaust Exit Rear
Exhaust Exit Service Side
High Lift Fuel Pump, 120″ Max Vertical Lift
Emergency Stop Programming and Pigtail
Fuel Level Sender Programming and Pigtail
Low Battery Auto Start Programming
Other Options May Be Available Upon Request

View More Enclosed Generators

PTI-20SI

Genset Information

Weight: 952 LBS
Overall Dimensions: 49 11/16″L X 27 1/2″W X 30 9/16″H, Risers + 2 1/2″ H
Fuel Type: Ultra-Lw Sulfur Diesel (ULSD)
Fuel Consumption: Full Load 2.3 GPH, Half Load 1.2 GPH
Fuel Lift Pump: Genset Mounted, Electric, 18″-24″ Max Vertical Lift
Service Interval: 250 Hours
Engine Coolant: Dex-Cool, Ethylene Glycol, 50/50, 10 QTs
Engine Oil: 15W-40, 8 QTs
Engine Electrical System: 12VDC
Starting Battery, 12V 500 CCA, Min. (Battery Not Included with Generator Set)
Fuel Bulkhead Fittings: 1/4″ NPT
Fuel Lines: Supply 3/8″, Return 3/8″
Exhaust Outlet 2″ NPT

Disclaimer: Weights and dimensions shown may vary and are for guidance only. Please confirm with your PowerTech Sales Representative before ordering.

Engine Specification

Make: Isuzu
Model: 4LE2T
Engine Type: Diesel, 4 Stroke
Configuration: Vertical In-Line, OHV, Liquid Cooled
Cylinders: 4

Generator End Specifications (Single Phase)

Type: Synchronous A/C Generator
Exciter Type: Self-Excited, Brushless, AVR Equipped
Rotor Support: Single Bearing
Frame Type: Open
Cooling: Fan Cooled
Insulation Class: H
Winding Pitch: 2/3
Ambient Temperature: 40 C
Temperature Rise 125 C
Service Rating: Continuous
Voltage: 240VAC
Frequency: 50/60 Hz
Power Factor 1.0
Phase: 1
Number of Poles: 4
Number of Leads: 4
Voltage Regulation: +/- 1%
Harmonic Distortion: <4%
Loading Recovery Time: <500 msec
Load Imbalance Allowed 25% (Maximum)

Generator End Specifications (Three Phase)

Type: Synchronous A/C Generator
Exciter Type: Self-Excited, Brushless, AVR Equipped
Rotor Support: Single Bearing
Frame Type: Open
Cooling: Fan Cooled
Insulation Class: H
Winding Pitch: 2/3
Ambient Temperature: 40 C
Temperature Rise 125 C
Service Rating: Continuous
Voltage: 480VAC
Frequency: 50/60 Hz
Power Factor 0.8
Phase: 3
Number of Poles: 4
Number of Leads: 12
Voltage Regulation: +/- 1%
Harmonic Distortion: <4%
Loading Recovery Time: <500 msec
Load Imbalance Allowed 25% (Maximum)

Main Circuit Breaker

Number of Poles: 3
Trip Type: Fixed Thermal, Fixed Magnetic
Max Rated Voltage: 600VAC
Interrupt Rating 18kAIC@ 240VAC, 14kAIC @480VAC
Frequency Rating: 50/60 Hz
Direct Short Trip Time: 10 msec

Generator Power Output at 60Hz - 20kw

Phase	Power Factor	Voltage	Amps
1	1.0	120	166
1	1.0	120/240	166/83
3	0.8	120/208	69
3	0.8	277/480	30

Generator Power Output at 50Hz - 16.6kW

Phase	Power Factor	Voltage	Amps
1	1.0	220	75
1	1.0	230	72
3	0.8	219/380	31
3	0.8	231/400	30

Generator controller Specifications

Make: Dynagen
Model: TG 600
Display: 4.3″, Color, Sunlight Readable
Moisture Resistance: IP67
Communication: CAN Bus J1939, RS-485 (Modbus)
Switched Inputs: 12
Switched Outputs: 10
Analog Inputs: 10

Standard Controller Monitoring and Shutdown

System	Warning	Shutdown
Oil Pressure	X	X
Coolant Temperature	X	X
Coolant Level		X
Fuel Filter Restriction	X
Air Filter Restriction	X
Generator Voltage	X	X
Generator Frequency	X	X
Generator Over Current	X	X
Engine Speed	X	X

Generator Decibel Level

dB Level	Location	Distance	Generator Load
71.0	Service Side	7 Meters	1/2 Load
77.0	Radiator End	7 Meters	1/2 Load
71.4	Non-Service Side	7 Meters	1/2 Load
71.7	Generator End	7 Meters	1/2 Load

Relative Decibel Level Information

dB Level	Pressure Rise in Pa	Source
180+	20,000	Space Shuttle Launch
160-179	2,000	NHRA Dragster
140-159	200	Jet Engine, Fireworks
120-139	20	Rock Concert, Police Siren
100-119	2	Lawn Mower, Helicopter
80-99	0.2	Semi-Truck, Hair Dryer
60-79	0.02	Normal Conversation, City Traffic
40-59	0.002	Whispering
20-39	0.0002	Quiet Bedroom
0-19	0.00002	Hearing Threshold

Generator options

Exhaust Exit Down
Exhaust Exit Rear
Exhaust Exit Service Side
High Lift Fuel Pump, 120″ Max Vertical Lift
Emergency Stop Programming and Pigtail
Fuel Level Sender Programming and Pigtail
Low Battery Auto Start Programming
Other Options May Be Available Upon Request

20 kW Enclosed Diesel Generator

Features

Upgrade your 20 kw generator

Slide Rack

remote control panel

Remote Radiator

fuel Tank

PTI-20SI Airflow

Genset Information

Engine Specification

Generator End Specifications (Single Phase)

Generator End Specifications (Three Phase)

Main Circuit Breaker

Generator Power Output at 60Hz - 20kw

Generator Power Output at 50Hz - 16.6kW

Generator controller Specifications

Standard Controller Monitoring and Shutdown

Generator Decibel Level

Relative Decibel Level Information

Generator options

View More Enclosed Generators

PTI-15SI

PTI-15SS

PTI-20SS

PTI-25SI

Request A Quote

20 kW Enclosed
Diesel Generator