Diesel Generators

Choosing a diesel generator means looking beyond the kVA figure on the badge. Consider whether the set will be used for occasional standby, mobile site work or more sustained operation. Different models list rated or prime output separately from maximum or standby output, and these figures must not be treated as interchangeable. Make a list of the equipment to be powered, including motor starting loads, then check the generator’s stated output for the duty you actually need.

Our range includes smaller air-cooled units and larger diesel sets, with both single-phase and three-phase choices. A 230V single-phase generator is not automatically suitable for 400V three-phase machinery. Likewise, a three-phase generator’s overall rating does not mean the full output is available from one 230V socket. Features vary by model: you may find electric start, acoustic enclosures, wheeled frames, monitoring panels or compatibility with automatic transfer switches (ATS). ATS equipment must be selected separately where it is not expressly included.

All diesel generators must run outdoors, away from doors, windows and air intakes; exhaust fumes contain dangerous carbon monoxide. Never backfeed a premises supply. Building connections require a qualified electrician and correctly specified changeover equipment. See also petrol generators for other engine-powered options, portable power stations for rechargeable units, or return to all generators.