Nengron - Professional Diesel Generator Manufacturer & Supplier | OEM & ODM Services

30kW/37.5kVA Dongfeng Cummins Diesel Generator Set 4BT3.9-G1 Open Frame Genset | Nengron 1

30kW/37.5kVA Dongfeng Cummins Diesel Generator Set 4BT3.9-G1 Open Frame Genset | Nengron 2

30kW/37.5kVA Dongfeng Cummins Diesel Generator Set 4BT3.9-G1 Open Frame Genset | Nengron 3

30kW/37.5kVA Dongfeng Cummins Diesel Generator Set 4BT3.9-G1 Open Frame Genset | Nengron 4

30kW/37.5kVA Dongfeng Cummins Diesel Generator Set 4BT3.9-G1 Open Frame Genset | Nengron 5

30kW/37.5kVA Dongfeng Cummins Diesel Generator Set 4BT3.9-G1 Open Frame Genset | Nengron 6

30kW/37.5kVA Dongfeng Cummins Diesel Generator Set 4BT3.9-G1 Open Frame Genset | Nengron

NC-4BT3.9-G1-30KW Open-Frame Diesel Generator Set

The Nengron NC-4BT3.9-G1-30KW open-frame diesel generator set is a compact and reliable power solution designed to provide 30kW prime power and approximately 37.5kVA output at 0.8 power factor. It is suitable for commercial, industrial, agricultural, construction, telecom and emergency backup applications where stable and dependable electricity is required.

Core Power Configuration

The genset is powered by a genuine Dongfeng Cummins 4BT3.9-G1 diesel engine featuring:

4-cylinder inline configuration
3.9L displacement
Turbocharged intake system
1500 RPM rated speed
BYC A fuel pump
RSV mechanical governor
102 × 120mm bore and stroke

This engine configuration provides reliable power response, straightforward maintenance and good adaptability for regular prime power and backup power projects.

Stable Electrical Output

The unit can be equipped with a three-phase brushless synchronous alternator featuring copper windings, Class H insulation and IP22 protection. The standard configuration can support 400/230V, 50Hz output, while other voltage and frequency specifications can be customized according to project requirements.

Intelligent Protection Functions

An intelligent digital controller can be installed to monitor key operating parameters, including voltage, frequency, current, coolant temperature and oil pressure. Available protection functions include:

Overload protection
Overcurrent protection
Over and under-voltage protection
Over and under-frequency protection
High coolant temperature alarm
Low oil pressure alarm
Overspeed protection
Emergency stop

These functions help improve operating safety and reduce the risk of equipment damage caused by abnormal conditions.

Main Advantages

Trusted Cummins power: Proven Dongfeng Cummins engine technology for dependable operation.
Compact 30kW solution: Suitable for locations with limited installation space.
Easy maintenance: Mechanical fuel system and open-frame design simplify inspection and servicing.
Flexible configuration: Compatible with different alternator, controller, voltage, frequency and enclosure options.
Wide application range: Suitable for construction sites, farms, workshops, telecom stations, retail facilities and emergency power systems.
OEM and ODM support: Customized logo, color, nameplate, export packaging and technical documentation are available.

Optional Configurations

The generator set can be supplied with:

ATS automatic transfer switch
Intelligent digital controller
4G remote monitoring system
Silent canopy
Mobile trailer
Parallel control system
Customized alternator and controller
50Hz or 60Hz electrical configuration

Customer Value

The NC-4BT3.9-G1-30KW helps customers obtain dependable power without selecting an oversized generator. Its compact structure, recognized engine brand, flexible configuration and convenient maintenance make it a practical choice for projects that require stable electricity, controlled equipment cost and long-term serviceability.

Contact Nengron for the complete configuration, voltage selection, quotation and technical confirmation.

Payment:

30% deposit, 70% balance before shipping

Certification:

CE,ISO,EPA

Delivery time:

7-15 working days

MOQ:

Model:

NC-4BT3.9-G1-30kw

Inquiry

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Total Weight:

893 kg

Overall Dimension (L×W×H):

1820 × 760 × 1280 mm

Optional System:

ATS Automatic Transfer Switch,Remote WiFi Monitoring Module,Parallel System

Warranty

12 months or 1000 working hours global factory warranty (whichever comes first)

Factory‑Test

100% full‑load test, no‑load test, safety‑performance test before shipment

Certification

EPA Tier 2,ISO9001,ISO14001,CE

Automatic Protection

Overload,Short‑circuit,Over‑speed,High water‑temp,Low oil‑pressure,Over‑voltage & under‑voltage protection

Protection Grade

IP23

Insulation Class

H‑Class

Operation Type

Emergency Standby Power

Noise Level (1m)

≤85 decibels (open‑type without canopy)

Engine Brand

Cummins

Prime Power

30 kW

Advantage

Reliable Performance, Low Fuel Consumption, Compact Design, Easy Maintenance, Strong Load Response, OEM/ODM Support

Application

Mining,Construction,Data Center,Commercial Building,Factory,Hospital,Off‑grid Power Supply

Max Engine Power:

36 kW

Rated Voltage

400V/230V

Available Type

Open Type

Genset Model

NC-4BT3.9-G1-30KW

Standard

base fuel tank,pure copper alternator,intelligent controller,Cummins original engine,radiator,industrial silencer,control panel

Engine Model

4BT3.9-G1

Payment

30% deposit, 70% balance before shipping

MOQ

Product Description

This 30kW open-frame diesel generator set is powered by a genuine Dongfeng Cummins 4BT3.9-G1 four-cylinder inline turbocharged engine, providing reliable power output and strong load response for prime power and emergency standby applications. With a 3.9L displacement, 1500 RPM rated speed and mechanical fuel injection system with mechanical governor, the unit delivers stable performance and dependable operation in commercial, industrial, construction, agricultural, telecom and backup power applications. Its compact design, simple structure and convenient maintenance make it suitable for continuous-duty and standby power projects. The generator set can be equipped with high-quality alternators and intelligent control systems, with optional ATS, silent canopy, mobile trailer and remote monitoring configurations available according to project requirements.

WHY CHOOSE US?

Product Characteristics

Genuine Dongfeng Cummins Power Core

The NC-4BT3.9-G1-30KW diesel generator set is powered by a genuine Dongfeng Cummins 4BT3.9-G1 four-cylinder inline turbocharged engine. With a 3.9L displacement, 1500 RPM rated speed and mechanical fuel injection system with mechanical governor, it delivers reliable 30kW prime power for commercial, industrial, construction, agricultural, telecom and emergency power applications.

Stable Power Output with Brushless Alternator

The generator set is matched with a three-phase brushless synchronous alternator featuring Class H insulation and IP22 protection. With a rated voltage of 400/230V and a frequency of 50Hz, it provides stable power output for a wide range of electrical equipment. Alternator options from Stanford, Marathon, Leroy-Somer, Engga and Longxin are available according to project requirements.

Intelligent Safety Protection

The unit can be equipped with an intelligent digital controller for real-time monitoring of voltage, frequency, current, coolant temperature, oil pressure and other operating parameters. The protection system supports automatic alarm or shutdown in the event of overload, over/under voltage, over/under frequency, high coolant temperature, low oil pressure, overspeed or emergency stop, helping ensure safe and dependable generator operation.

Product Details

Engine

The NC-4BT3.9-G1-30KW diesel generator set is powered by a genuine Dongfeng Cummins 4BT3.9-G1 four-cylinder inline turbocharged engine. With a 3.9L displacement, 1500 RPM rated speed, BYC A fuel pump and RSV mechanical governor, it delivers reliable power output, stable load response and convenient maintenance for prime power and emergency standby applications.

Alternator

The NC-4BT3.9-G1-30KW diesel generator set is equipped with a 100% pure copper, three-phase brushless synchronous alternator featuring Class H insulation and IP22 protection. It delivers stable 400/230V, 50Hz power with low waveform distortion, helping protect sensitive electrical and precision equipment from damage caused by voltage fluctuations. Optional alternator brands include Stanford, Marathon, Leroy-Somer, Engga and Longxin.

Radiator

The NC-4BT3.9-G1-30KW diesel generator set is equipped with a heavy-duty industrial radiator and an efficient cooling system to help maintain stable engine temperature during continuous operation. The radiator supports reliable heat dissipation and dependable performance in commercial, construction, agricultural, telecom and emergency power applications.

OEM INTRODUCTION

We provide one-stop OEM & ODM customization services for NC-4BT3.9-G1-30KW Dongfeng Cummins diesel generator sets. Customization options include brand logo, unit color, exclusive nameplate and export packaging to meet different branding and international procurement requirements.

Optional configurations include ATS automatic transfer switch, 4G remote monitoring system, silent canopy, mobile trailer and parallel control system. The genset can be configured with suitable 50Hz or 60Hz voltage and frequency specifications according to the project requirements.

We can also provide product certification documents, technical documentation and multilingual operation manuals to support global customers with installation, operation and maintenance.

Product Application

This 30kW NC-4BT3.9-G1 Dongfeng Cummins diesel generator set provides a reliable prime power and emergency standby power solution for construction sites, farms, small manufacturing facilities, telecommunications systems, commercial buildings and other outdoor or backup power applications.

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Product Package

The NC-4BT3.9-G1-30KW diesel generator set is securely fixed on an integrated steel base and protected with anti-rust film and a durable outer covering to help prevent collision, dust and oxidation damage during long-distance sea and land transportation.

The generator set can be placed on an IPPC-fumigated wooden pallet for safe container shipment in accordance with international export logistics requirements. Consumable filters, maintenance tools and multilingual operation manuals are packed separately in protective cartons.

We support customized shipping marks, outer packaging logos and export documentation. Flexible packaging solutions are available to meet the transportation and handling requirements of overseas buyers.

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FAQ

Tell us about your project requirements and we will figure out a solution that will meet your budget and design expectations.

What types of generator sets do you mainly supply? What is your power range?

We mainly supply diesel generators, gas generators, silent generators, mobile generators and containerized generator sets, with power coverage from 30kW to 3000kW. We can provide prime power, standby power and continuous power according to customer requirements.

What is the difference between prime power and standby power? How to choose the right model?

Prime power is for long-term continuous operation. Standby power is for emergency short-time use. We usually suggest reserving 15%-25% power margin for stable operation.

What brands are used for key components? How do you ensure product quality?

We adopt famous brand engines and alternators such as Cummins, Perkins, Yuchai, Weichai, Shangchai, Cat, Stamford, Marathon, etc. Each unit passes strict factory testing and quality inspection.

What about the fuel consumption and noise level of your generators?

Fuel consumption is about 190–220g/kW·h. noise is 72–78dB,Fuel consumption 190–220g/kW·h

What international certifications do your products have?

Our generators have CE, ISO9001, EPA, SONCAP, PVOC and other certifications, which can meet customs clearance and emission standards of most countries.

Do you support automatic start, remote monitoring and parallel operation?

Yes. We support auto mains failure, remote monitoring, multi-unit parallel operation, intelligent control and cloud platform management.

How many years of experience do you have in generator export business?

We have many years of professional experience in generator export, serving more than 100 countries and regions in Asia, Africa, Middle East, South America and Europe

Are you an authorized distributor of engine or alternator brands?

Yes, we are authorized distributor of several well-known engine and alternator brands, with official authorization and complete qualification documents.

What is your delivery time? Can you accept urgent orders?

Standard delivery time is 15–25 working days. For urgent orders, we can finish production and delivery within 7–10 working days.

Do you accept factory audit and third-party inspection?

We warmly welcome factory visits, loading supervision and on-site testing. Third-party inspections such as SGS, BV, Intertek are also supported.

Do you provide after-sales service and technical support overseas?

We have cooperative service networks in main markets, providing installation, commissioning, operation training and 24-hour technical support.

What is included in your quotation? What payment terms do you accept?

Quotation includes generator unit, accessories, standard packaging and testing. We accept T/T, L/C, D/P and so on, and trade terms EXW, FOB, CIF, CFR and so on

What is your warranty policy?

We provide 1 year or 1000 hours warranty (whichever comes first). Core components enjoy extended warranty support.

How about packing and shipping? Can you assist with customs clearance?

We use export standard plywood fumigation-free packing. We cooperate with reliable shipping agents and can assist with customs clearance and door-to-door delivery.

Do you provide customized solutions and turnkey power projects?

Yes. We provide customized design, OEM/ODM service and turnkey power station solutions including supply, installation and maintenance.

Get in touch with us

Just leave your email or phone number in the contact form so we can send you a free quote for our wide range of designs!

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