Diesel Generators Guide

Diesel Generators Guide

YorPower build, supply and install diesel generators ranging from 10 to 2200kVA, generally from our factory stock.  The YorPower range includes generators both for domestic and industrial applications, usually employing Perkins diesel engines.  In addition YorPower have the ability to build and supply generator sets up to 3375kVA for bespoke requirements at LV, MV and HV.

YorPower Diesel Generators can be supplied open (ie: without a canopy/enclosure), in heavy duty, close-fitting weather and soundproof canopies or they may be 'up fitted' into specifically designed ISO containers.  When circumstances demand even lower levels of noise, for example in residential areas, YorPower can also supply 'super silent' low noise-level units which can reduce noise levels to as low as 55dBA @1m.

An important requirement in markets where power is needed in remote locations is the provision of reliable, dependable and 'on tap' electricity.

YorPower fulfil this need with a fully self-contained 1 megawatt (1250kVA) ‘Powerbox’.  The YorPower Powerbox is fully capable of synchronising in parallel with up to fifteen generators thereby creating a virtual 'power hub'. Working closely with local partners in The Middle East and Africa, YorPower has installed several mini power stations including in Nigeria, Iraq and Ghana.  Output voltage can stepped up if necessary by the installation of suitably rated transformers or the fitting of HV lternators to provide 11kV.

YorPower Technical Support and Information

The key technical criteria we consider when advising our customers.

  • Sizing
  • Housing
  • Control Systems
  • Options

YorPower is a totally independent manufacturer so can provide the engine/alternator/control system that each customer required.  We don’t try to sell you the diesel generators with engines from the following manufacturers:
We use three main alternator manufacturers: Newage Stamford (Cummins Generator Technologies), Leroy Somer and Mecc Alte.
Digital Control Panels are typically based on Deep Sea Electronic control systems.

Generator Sizing

By international convention, all generators are nominally sized by their kVA standby rating at standard environmental conditions of:

  • 27C Site temperature
  • 154.2 metres above sea level
  • 60% Relative Humidity

An increase in any of the above values will cause a reduction in the nominal generator rating and will generally require a larger engine size and often a different, lager, alternator. YorPower  ensure that our generators are sized in accordance with site conditions. We also advise whether the rating is prime, standby or continuous.
YorPower supply generators  to run at 1500 RPM/50 Hz or 1800 RPM/60Hz. The entire YorPower range is available in three phase from 10KVA.  We also manufacture single phase diesel generators starting at 3.5kVA and going up to 60kVA


Open Diesel Generators are supplied for use in plant rooms designed and built to provide optimum running conditions. Alternatively generators can be supplied in a custom made canopy or container, again deigned to ensure that the generator operates within its optimum conditions.
YorPower are always happy to advise on all aspects of the plant room requirements, and can supply the ancillary equipment required for:

  • Weather proof and sound attenuated louvers
  • Control cable requirement
  • Cable sizing
  • Intake of air and hot air removal
  • Exhaust ducting and silencing
  • Single or double skinned fuel piping
  • Fuel tanks, either internal, external, single skinned or bunded
  • Physical sizing of all of the above

Where no plant room is available, or for outdoor use, YorPower can supply weatherproof enclosures including:

  • Close fitting canopies
  • ISO rated Containers
  • Drop-over canopies

YorPower can provide enclosures to reduce noise to the levels stipulated by clients. Typically maximum decibel requirements vary from a ‘low noise’ level of 65dBA (where noise reduction is critical) to 80dBA where low noise level reduction is required but the need for minimal noise is not as critical. Most of the acoustically canopied generators supplied by YorPower produce between 78dBA and 80dBA at 1m, complying with European recommended guidelines.

Control Systems

YorPower offer a comprehensive range of control systems including:

  • Key start for basic on/off control
  • Auto/remote start for standby and emergency applications where automatic switch-on is required
  • Generator synchronisation where there is a need to load share with other generators or power inputs
  • Mains synchronisation where there is a precise load requirement and/or when exporting to the National Grid main supply via G59 mains relay protection
  • Fuel transfer systems for controlling fuel supply to the generator(s)
  • Remote Monitoring to allow users, managers, engineers, etc to oversee all alarms, fault signals, fuel systems, generator running modes, etc from any number of Desk Top PCs or mobile devices.

YorPower also supply bespoke control systems for practically any requirements.


YorPower Diesel Generators can be supplied with several options which are always clearly identified in our offer specification including identifying them as essential or optional.
Some typical options include:

  • Battery Charger – always recommended for standby applications
  • Water Heater – very useful for cold weather starting, in cold climates and in some deserts where nigh time temperatures can be very low.  Always recommend for UK customers.
  • Transfer Panel – manual, automatic or dual mutual control
  • Anti-Condensation Heater – avoids problems in certain warm, humid weather conditions
  • Tropical Radiator – for hot conditions and frequently specified on larger generators (1000kVA and above) for the UK and export markets.
  • Lube Oil Top-up System – to ensure sufficient lubrication when a generator may run continuously for more than 12 hours at a time to prevent engine failure/seizure.
  • Spark Arrestors – essential where generators are used in volatile environments such as oil and gas installations or refineries where sparks carry enormous risk. Spark arrestors are fitted to exhaust/silencer stacks.

New Diesel Generator Guide Prime powered kVA ratings

  • Perkins                  10kVA to 2000kVA
  • Cummins               750kVA to 3375kVA
  • MTU                      700kVA to 3000kVA
  • Mitsubishi              5kVA to 40kVA
  • Kubota                  8kVA to 20kVA
  • John Deere            30kVA to 275kVA
  • Volvo                    200kVA to 635kVA
  • Honda                   3.5kVA to 7.5kVA