
FB40-4A
40 kVAPrime power at 50 Hz
- Leyland engine
- H4G4DE40
- Fuel tank
- 85 litres
- Supply
- 415/230 V
An FG Wilson diesel generator with the Leyland H4G4DE60 engine and Leroy Somer LSAP 42.3 K alternator. Explore the published specification with FW Power.

Use the published 58.5 kVA prime output when comparing this model with alternatives. If your load assessment calls for 60 kVA prime, ask our team to check the margin or compare the FB82.5-4A rather than relying on the FB60 model name.
The 3.84-litre Leyland engine operates at 1,500 rpm. Its standard equipment listing includes a 140-litre fuel tank and 100 A circuit breaker. Our team can review how these fit your load, required running time and installation.
FB60-4A is the model designation. The published 50 Hz prime output is 58.5 kVA.
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| Manufacturer | FG Wilson |
|---|---|
| Generator model | FB60-4A |
| 50 Hz prime power | 58.5 kVA |
| Frequency | 50 Hz |
| Voltage | 415/240 V |
| Engine speed | 1,500 rpm |
| Emissions classification | CPCB IV+ |
| Engine make | Leyland |
| Engine model | H4G4DE60 |
| Displacement | 3.84 litres |
| Governor | Electronic A0 |
| Bore × stroke | 104 × 113 mm |
| Compression ratio | 16.5:1 |
| Alternator brand | Leroy Somer |
| Alternator model | LSAP 42.3 K |
| Alternator protection | IP23 |
| Alternator insulation | Class H/H |
| Voltage regulation | ±1% (published alternator specification) |
| Fuel tank capacity | 140 litres |
| Listed circuit breaker | 100 A |
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.
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.
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.
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 the published prime outputs, then let our team help assess the application.
Tell us what you need to power. We’ll help you find the right solution.