
Weichai WPG125B9NG Natural Gas Generator Set
Weichai WPG125B9NG Natural Gas Generator Set
Model: WPG125B9NG | Power: 100kW (Prime) / 110kW (Standby) | Fuel: Natural Gas (NG)
Product Overview
Reliable Power, Green Energy
The Weichai WPG125B9NG is a high-performance, soundproof natural gas generator set. Built on Weichai’s deep expertise in heavy machinery, this unit integrates advanced European gas engine control technology. It is specifically designed for industrial and commercial users seeking high reliability, low operating costs, and environmentally friendly emissions.
Whether used as a prime power source in areas with unstable grids or as a backup power supply for critical loads, the WPG125B9NG delivers uninterrupted, clean electricity with outstanding fuel economy and stability.
Core Advantages
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Cost‑Effective: Natural gas is significantly cheaper than diesel, reducing total cost of ownership (TCO) over the long term.
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Environmentally Friendly: Meets national emission standards for non‑road mobile machinery, with far lower CO₂ and particulate matter emissions than equivalent diesel units.
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Integrated Powertrain: Powered by Weichai’s original WP5 series gas engine – not an assembly of third‑party components – ensuring optimal matching and performance.
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Quiet Operation: Standard soundproof enclosure effectively reduces noise, making it ideal for noise‑sensitive environments such as hospitals, hotels, and residential areas.
Detailed Technical Specifications
1. Generator Set Parameters
| Parameter | Specification |
|---|---|
| Model | WPG125B9NG |
| Prime Power (PRP) | 100 kW / 125 kVA |
| Standby Power (ESP) | 110 kW / 138 kVA |
| Rated Frequency | 50 Hz |
| Rated Voltage | 400/230 V (customizable) |
| Power Factor | 0.8 (lagging) |
| Phase / Connection | 3‑phase, 4‑wire, star connection |
| Fuel Type | Natural Gas |
| Gas Inlet Pressure | 10–30 kPa (medium pressure) |
| Control Mode | Automatic / Manual / Remote start |
| Dimensions (L×W×H) | 2800 mm × 1100 mm × 1600 mm (soundproof type) |
| Weight | 1850 kg |
2. Engine Parameters (Weichai Power)
| Parameter | Specification |
|---|---|
| Engine Model | Weichai WP5NG175E30 |
| Configuration | Inline 4‑cylinder, 4‑stroke |
| Intake Method | Turbocharged, charge‑air cooled |
| Displacement | 4.5 L |
| Rated Speed | 1500 rpm |
| Governor Type | Electronic (closed‑loop control) |
| Cooling System | Closed water cooling with radiator and fan |
| Starting Method | 24V DC electric start |
3. Alternator Parameters
| Parameter | Specification |
|---|---|
| Alternator Brand | Stamford / Marathon / Weichai original (optional) |
| Insulation Class | Class H |
| Protection Class | IP 23 |
| Excitation Type | Brushless, self‑excited with AVR |
| Voltage Regulation | ≤ ±1% |
Core Technology Configurations
1. Intelligent Control System
Equipped with a Weichai original LCD touchscreen controller, featuring:
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Auto mains failure (AMF) / ATS interface
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Multiple protection functions: low oil pressure, high coolant temperature, overspeed, overcurrent, short circuit
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RS485 communication port supporting Modbus protocol for remote monitoring and unattended operation
2. Gas System
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Uses Woodward (USA) or equivalent high‑quality gas control components.
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Closed‑loop air‑fuel ratio control automatically adapts to variations in gas calorific value, ensuring complete combustion and stable exhaust temperature.
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Includes a gas filter and pressure regulator to maintain clean intake gas.
3. Soundproof Enclosure
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Fully enclosed soundproof housing made of high‑quality cold‑rolled steel.
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High‑density, flame‑retardant acoustic foam lining reduces noise to 75–78 dB(A) at 1 meter.
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Integrated large‑capacity base fuel tank (optional) and spill containment tray meet environmental requirements.
Application Scenarios
With its clean, quiet, and efficient operation, the Weichai WPG125B9NG is widely used in:
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Commercial & Industrial Centers: Shopping malls, office buildings, supermarkets – standby power.
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Public Facilities: Hospitals, schools, government buildings – emergency and security power.
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Oilfield Associated Gas: Utilizing associated gas for power generation, turning waste into energy.
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Agriculture & Livestock: Modern farms, greenhouses – prime power (using natural gas or biogas).
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Telecommunication Base Stations: Prime or backup power for remote sites.
Why Choose Weichai WPG125B9NG?
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Brand Reliability: Weichai is a leading global manufacturer of powertrain and heavy‑duty equipment, backed by a comprehensive after‑sales service network.
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OEM Quality: The engine, alternator, and control system are all Weichai original or designated components, eliminating compatibility issues common with assembled units.
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Full Lifecycle Support: Over 7,000 service stations nationwide provide 24‑hour response and genuine spare parts availability.
Inquiry
For detailed pricing, customization options (such as parallel operation, containerized units, ATS cabinets), or specific lead times for the Weichai WPG125B9NG, please contact us.
[Request a Quote]
[Technical Consultation]
*Note: The specifications above are based on standard configuration (50 Hz, 400/230 V). Actual products may vary slightly depending on specific configuration, installation environment, and gas composition. Final specifications are subject to the technical agreement in the sales contract.*

