Diesel rotary UPS

Today market offers different variants of systems which help to solve the problems connected with uninterruptible power supply. Maybe you are already familiar with the alternative technologies – dynamic diesel rotary UPS.

Dynamic UPS demonstrate its advantages in working efficiency, reliability, working lifespan, size in short term and long term electricity supply perspective.

NO-BREAK KS® system construction

Dynamic UPS NO-BREAK KS® represents a single module, which resembles usual diesel-generator set, however it consists of: a diesel engine (produced by MTU, Cummins, Mitsubishi, Deutz) that is coupled to a stato-alternator by electromagnetic clutch. In its turn the stato-alternator is a combination of a kinetic energy accumulator and a synchronous machine.

NO-BREAK KS® system also includes a power panel with choke and a control panel with KS-VISION® touch screen.

Simple but clever system

NO-BREAK KS® is a dynamic system in which uninterrupted power supply is conducted by the alternator. The system operates without using bulky storage batteries and power electronic elements of high capacity.

In conditioning mode, when electricity mains operates within tolerances, an alternator and a choke work as a mains surge filter and maintain on-load voltage within tolerance. The system also reduces mains distortion and improves the power factor in outgoing feeders. As a result, the system supplies perfect sinewave.

In independent mode during mains failure or voltage perturbation, NO-BREAK KS® disconnects the mains power supply and transfers power to the load, until the mains supply returns.

What is the dynamic UPS advantage over the usual ones?

High efficiency – dynamic UPS NO-BREAK KS® is the best performing system, which shows 96% efficiency;Exclusion problems with power supply load – all the disturbances with power supply voltage, such as switching spikes, voltage harmonics, etc. are excluded in all operating modes. power consumption peaks (motor starts, short-circuits etc.) and the harmonic currents caused by the load (in the event of non-linearity) are filtered out by the No-Break KS.

Power factor correction – NO-BREAK KS® system regulates reactive power, which gives an opportunity to control input power factor. This means there is no need for additional power factor correction systems.
The power panel contains the automatic circuit breakers to disconnect from the mains in case of mains failure and transfer to by-pass during some maintenance procedures.
The bearings are not loaded – bearings rotate at relative speed of 1500 rpm, guaranteeing low temperature conditions, high effectiveness and very long lifetimes.
Monobloc design – NO-BREAK KS® system is a Monobloc design; all machines are directly coupled, which makes the NO-BREAK KS extremely robust. The NO-BREAK KS® does not require critical laser alignment inspection in the factory and at site.
Redundant starting system – the NO-BREAK® system is equipped with a redundant starting system by means of an electro-magnetical clutch.
Small footprint – system capacity of 2500kVA (50Hz) allows to save up to 50% floorspace in contrast with static UPS systems.
Various configurations – The NO-BREAK KS® systems can be designed in various configurations, most common are the single and the parallel configuration.

Dynamic UPS model series power can vary from 200kVA to 2500kVA. What is more, power changes in small steps, which certainly is a plus. A customer can find the model that with the power needed.

Method of procedure

In the heart of the NO-BREAK KS®‚ is its kinetic energy accumulator; a clever but simple system to store and retrieve kinetic energy. The kinetic energy accumulator consists of two rotating parts: the outer rotor runs mechanically-free around the inner rotor.The inner rotor, driven by the main shaft, rotates at 1500 rpm (50 Hz) or 1800 rpm (60 Hz). It contains two sets of windings; a three-phase AC winding and a DC winding.

Conditioning Mode

Energy storage

Transition period

Energy retrieval

Independent Mode

Energy storage repeat

Conditioning Mode

Network recovery

In conditioning mode, the AC winding is energized to generate a rotating magnetic field, which accelerates the outer rotor to approximately 3000 rpm. Nevertheless, the relative speed between the inner and outer ring of the bearings is only 1500 rpm, since the shaft itself is rotating at 1500 rpm.

The outer rotor (kinetic energy accumulator) stores the kinetic energy advantageously, since the amount of kinetic energy increases quadratically with the distance from the centre of rotation.

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.

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.

In the event of a diesel engine start-up failure, the electromechanical clutch will close shortly after opening QD1 and the outer rotor is electrically coupled to the inner rotor by induction. Its kinetic energy is transferred to the inner rotor -- it drives it. This energy transfer is regulated by accurately controlling the current injected into the DC winding.

The kinetic energy of the accumulator will start the diesel engine.

When the diesel engine starts, it 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.

The kinetic energy accumulator is a totally brushless system.

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 dynamic diesel rotary UPS secures the critical load against an unlimited number of repeated mains failures. These systems are used by:

Electronic products manufacturers: Belgium• Alcatel Microelectronics-Opel Belgium- Philips Petroleum Belgium. China• Grace Semi Conductors Мanufacturing Company. France • Atmel-MerkSharp&Dome-Michelin-Rhone Poulen-Sanofi. Germany • Eko-Stahl. Italy • Bitolea-Enichem-Filatice-Miroglio-Sifra-S.T. Microelectronics. Mexico • Vidrio Flotado. Norway • Nordahls Trykken. Switzerland • Cristalor (Cartier)-Noyfil-Usiflamme. Taiwan • Quanta Display Inc. Thailand • Phelps Dodge-Thai Copper Rod. Turkey • Assan Demir Aluminium-Izmir.

Banks: Bulgaria • Bulgarion National Bank. France • Banca Privada Andorra-Bred. Great Britain • Barclays Bank-Ing Barigs-Bloomberg-Cazenove-Citygroup-Deutshe Banc-National Westminster Bank- Pearl Assurance-Reuters. Italy • Banco Ambrosiano Veneto-Banca Popolare di Milano-CariploBank. Luxemburg • Credit Agricole. Switzerland • Reuters-UBS-La Vaudoise. South Africa • Standard Bank of South Africa.

Airports: Belgium • BIAC-Brussels Airport-Brussels South CharleroisAirport- Liege Airport. Germany • Flughafen Frankfurt/Hahn-Fraport. Lebanon • Beyrouth International Airport Spain • Almeria Airport–Barcelona Airport – Gava Traffic Control Center-Madrid Airport. Taiwan • Chang Kai Shek Airport Teipei. Tunisia • Monastir Airport-O.P.A.T.- Sfax Airport. Turkey • Bursa Airport.

Public services on cars and railways: Belgium • Belliard Tunnel-Leopold II Tunnel-Liefkenshoek Tunnel –E25/E40 Motorway connection-A8 Motorway- SNCB (Belgian railways)-Dendermonde. Great Britain • Greater Manchester Police-H.M.Customs and Excice. Holland • K MAR. Taiwan • Post Office Teipei.

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