The HITZINGER No-Break UPS system provides reliable uninterruptible power supply with high availability and quality. The kinetic energy module, alternator and coupling choke work together to provide power conditioning and ride-through energy for the Dynamic Rotary Uninterruptible Power Supply (DRUPS) system, whilst the diesel engine ensures the long-term back-up in the event of a mains failure.

Diesel Rotary Uninterruptible Power Supply (DRUPS)

The Diesel Rotary Uninterruptible Power Supply (DRUPS) from HITZINGER combines a flywheel-powered, No-Break UPS and a diesel generator. Most uninterruptible power supplies are powered by battery or flywheel. In the event of a mains failure the stored energy within the UPS provides limited energy for a few seconds or minutes only. When mains supply fails, the flywheel releases its energy into the diesel generator for a quick start-up. Then the diesel generator supplies energy for the UPS and ensures a continuous power supply until mains returns.

IT Power: No-Break UPS / DRUPS in use

Data centres, airports and hospitals above all need an exceptional degree of safety, reliability and stability in their power supply. U POWER No-Break UPS systems guarantee the highest availability of clean and uninterruptible energy.


Why choose a No-Break UPS or DRUPS from HITZINGER?
International references testify to our many years of experience and comprehensive expertise. Our team will be happy to advise you, even as early as the preparation phase. We plan and realise tailor-made solutions.

Technical data

Power classes

  • Power ratings from 150 kVA to 2,500 kVA
  • Voltages from 400 V to 11 kV
  • Frequencies from 50 Hz to 60 Hz


  • Stationary setup
  • Container version
  • Enclosed version


  • Ambient temperature: -30 °C to +50 °C
  • Noise level: up to 45 dB(A) at 3 m


  • ISO 3046
  • IEC 60034-1
  • ÖVE/ÖNORM 8001
  • ÖVE/ÖNORM 8002
  • ÖVE/ÖNORM 8007
  • IEC / EN 88528-11
  • TIA 942
  • Tier I - Tier IV of the Uptime Institute
  • CAT I, CAT II of the International Civil Aviation Organization (ICAO)
  • other standards (e.g. UIC, EN, IEC, ISO, UL) to requirements

Technical highlights

  • Stabilisation and filtering to protect consumers from harmonic oscillations, voltage peaks, voltage drops and frequency faults.
  • Cutting edge engine technology ensures low-polluting emissions of our systems. As an option, our systems can also be designed for optimum fuel economy.
  • Hitzinger alternators generate voltages of up to 11 kV independently, which offers benefits such as low losses and greater reliability thanks to minimisation of components and absence of step-up transformers.
  • Preventive system protection for prolonged service life, system monitoring, coil temperature monitoring, vibration monitoring, ...
  • Downtimes/maintenance intervals reduced by automatic lubrication systems, special engine air cleaners and fuel filters that can be switched over during operation,...
  • As a general contractor, we are able to realise complete turnkey projects, including aspects such as engineering, execution planning, production with subsequent factory approval, delivery and local installation.
  • Efficiency-optimised version with up to 97 % for lowest running costs and lowest Total Cost of Ownership (TCO) with respect to system service life.
  • Redundant start-up. In the worst case scenario where the starter batteries fail or the starter is defective, a back-up solution brings the engine up to speed and the system continues to guarantee an uninterrupted supply to critical consumers.
  • “Black start”: In the absence of a grid voltage, the system can be put into operation by use of batteries or air starters – nothing should prevent the supply of power to your consumers.
  • EMC-tested, longlife modular controller, 15.4-inch touchpanel with intuitive user menu navigation.

Variants and options

  • Container version
  • Enclosed version
  • Air-start systems
  • Redundancy variants (system-/controller-redundant,..)
  • Comprehensive communications interfaces (Profibus, Profinet, Modbus,..)
  • Circuit breaker variants including 3-pole, 4-pole, plug-in technology,…
  • Manual bypass
  • Remote maintenance access to information on current system state via W-LAN
  • Touchpanel for displaying complete system
  • Comprehensive and specially tailored customer-specific factory approvals and training
  • Extended periods of warranty