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  • 2017.09.29 Recertification for EURO-DIESEL UK

    EURO-DIESEL (UK) Ltd (EDUK) is pleased to announce its successful recertification to: ISO 9001 Quality Management, ISO14001 Environment Management, OHSAS 18001 Occupational H&S Management.


  • 2017.04.10 Come and visit us at fairs and shows around the world

    Taking advantage of our worldwide network, we participate in many exhibitions about Data Center, Airport & Industry.

    Check out our next destinations!

  • 2017.02.08 EURO-DIESEL has been rated as STRONG

    EURO-DIESEL has been rated as “STRONG” in a new analysis of Europe's 687 largest Electrical Component Manufacturers. This is the highest accolade awarded and reflects our excellent performance over the last 12 months.


  • 2017.01.05 FORTRUST adopts Diesel Rotary UPS for backup power

    Is it a generator? A UPS? A flywheel? The new backup power systems at colocation specialist FORTRUST bring these elements together. As FORTRUST expands its Denver data center, it will use Diesel Rotary Uninterruptible Power Supply (DRUPS) from E1 Dynamics to provide emergency power during utility outages. The DRUPS unit features a diesel engine and a rotary UPS that uses kinetic energy, eliminating the need for batteries.


  • 2016.08.03 E1 DYNAMICS PRESENTS DRUPS: A Technical Review

    Flyer E1

  • 2016.06.20 EURO-DIESEL in the News - Jobs Regions 17062016


    Bien que ne faisant pas directement partie de l’aéronautique à proprement parler, la société EURO-DIESEL entretient néanmoins des liens étroits avec le secteur. Le plus évident est probablement le rôle essentiel joué par son produit phare auprès d’un de ses clients les plus importants: les aéroports & tours de contrôle du trafic aérien. Le très haut degré de technicité de ce produit le rend également comparable aux technologies de l’aéronautique. Nous avons rencontré Philippe Gillain, administrateur délégué d’EURO-DIESEL, qui nous explique les spécificités de cette entreprise liégeoise, et les profils qui contribuent à sa réussite.


How it works : Operation description


Animation Video : NO-BREAK KS® intervention during power outage



Operation description of a diesel rotary UPS system : conditioning mode

Conditioning Mode

In conditioning mode, when the mains supply is within tolerance, the synchronous machine is acting as a motor, driving the main shaft and thus the accumulator, storing kinetic energy in it.

When the inner rotor rotates at 1500 rpm (50 Hz) or 1800 rpm (60 Hz), the outer rotor then rotates at maximum 3000 rpm. The kinetic energy is thus stored.

99% of the time or more, the NO-BREAK KS® operates in conditioning mode and guarantees the supply of a clean electrical, and conditioned power to the load.

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Operation description of a diesel rotary UPS system : independent mode

Independent Mode  

In independent mode--during mains failure or voltage perturbation--the stored kinetic energy is now transferred to the stato-alternator, which acts as a generator. This happens without any interruption to the user.

Shortly after, the diesel engine starts and couples to the stato-alternator by latching the electromagnetic clutch. The energy is then relayed from the diesel engine to the synchronous machine and then to the loads.


Sequence : 

  • QD1 opens
  • The kinetic energy transfered from the outer rotor maintains the frequency at 50 Hz (or 60 Hz) within +/- 1%
  • The engine starts
  • The electromagnetic clutch closes
  • When the engine reaches 1500rpm (1800 rpm for 60 Hz), it transfers power to the load, until the mains supply returns.

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Transfer From Conditioning Mode To Independent Mode 

Transient Period - NO-BREAK KS


This graph shows the transfer from conditioning to independent mode and back: The frequency is maintained within narrow tolerances, the accumulator’s speed decreases and then the diesel engine starts to provide power to the load.

In the event of a diesel engine start-up failure, the electromechanical clutch will close shortly after opening QD1 and the kinetic energy of the accumulator will start the diesel engine. This gives the NO-BREAK KS® a redundant start possibility; a second guarantee to start the engine.

The NO-BREAK KS® is the only system available on the market that guarantees the start of the diesel engine.

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Mains Return : Back To Conditioning Mode   

  •  The NO-BREAK KS®‚ synchronises with the mains supply.
  •  The outer rotor is re-accelerated to its rated speed.
  •  When the rated kinetic energy is stored, QD1 closes.
  •  The electromagnetic clutch opens.
  •  The diesel engine runs at idle speed for cooling and then stops eventually.

The system secures the critical load against an unlimited number of repeated mains failures.