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FG Wilson · CPCB IV+ diesel generator

FG Wilson FB40-4A
40 kVA prime power.

An FG Wilson diesel generator with the Leyland H4G4DE40 engine and Leroy Somer LSAP 42.3 F alternator. Explore the published specification with FW Power.

Prime rating
40 kVA at 50 Hz
Engine
Leyland H4G4DE40
Output voltage
415/230 V
Emissions
CPCB IV+
FG Wilson FB40-4A 40 kVA acoustic diesel generator, manufacturer range photograph
Manufacturer’s range photograph for FB40-4A. Final enclosure and equipment depend on the agreed specification.
FG Wilson FB40-4A

Smaller commercial loads

Start with essential circuits and the largest starting load. A workshop or commercial premises with a modest running demand can still require extra transient capability for a compressor or pump. Share the starting method as well as the running power.

The 3.84-litre Leyland engine operates at 1,500 rpm. Its standard equipment listing includes a 85-litre fuel tank and 63 A circuit breaker. Our team can review how these fit your load, required running time and installation.

What to establish before ordering

  • Required duty, operating hours and actual load profile
  • Motor starting, load steps and voltage-dip limits
  • Site location, climate, access and available space
  • Changeover, distribution, protection and earthing scope
  • Noise criteria and fuel autonomy requirements
  • Applicable emissions certification and final documentation
Published manufacturer data

FB40-4A
technical specification.

Use these details to compare models and prepare an enquiry. Confirm the supplied configuration, site derating and operating limits against the approved technical documents.

The rating below is prime power. A separate standby rating is not stated here. Dimensions, weight, fuel consumption and noise measurement conditions are provided in the model PDF below.

Alternator IP23 is an alternator classification, not a weatherproof rating for the complete generator enclosure.

Ask our team about this specification
FG Wilson FB40-4A technical specifications
ManufacturerFG Wilson
Generator modelFB40-4A
50 Hz prime power40 kVA
Frequency50 Hz
Voltage415/230 V
Engine speed1,500 rpm
Emissions classificationCPCB IV+
Engine makeLeyland
Engine modelH4G4DE40
Displacement3.84 litres
GovernorElectronic A0
Bore × stroke104 × 113 mm
Compression ratio16.5:1
Alternator brandLeroy Somer
Alternator modelLSAP 42.3 F
Alternator protectionIP23
Alternator insulationClass H/H
Voltage regulation±1% (published alternator specification)
Fuel tank capacity85 litres
Listed circuit breaker63 A
Technical documents

Your FB40-4A
datasheet, in one place.

Download the model technical datasheet with generator, engine, alternator and fuel-system information, plus dimension drawings.

Check the final supplied configuration and installation requirements with TEAM FW Power before ordering.

The complete power solution

Configure the package
around the application.

Discuss generator supply, changeover, delivery and service with TEAM FW Power. Controls, fuel arrangements, acoustic requirements and site connections should be agreed as part of the quotation.

CPCB IV+ and your project

This model is listed as CPCB IV+ compliant. That classification must be checked against your destination and intended use; it is not a statement of UK/EU Stage V approval.

For an automatic standby application, confirm the engine-start interface and transfer sequence. A conventional ATS introduces a changeover interruption. Tell us about any loads that require UPS support or another continuity solution.

Running time depends on usable fuel capacity and the actual load. The listed tank volume alone does not establish a guaranteed number of operating hours.

TEAM FW Power

Let’s specify your
FB40-4A properly.

Tell us what you need to power, where it will operate and when you need it. Our team can discuss generator selection, changeover equipment, delivery, installation and ongoing service.

Compare nearby ratings

Explore your alternatives.

Compare the published prime outputs, then let our team help assess the application.

Let’s put your power in place.

Tell us what you need to power. We’ll help you find the right solution.

Talk to our team