@inproceedings{KernKrichel2002,
  author    = {Kern, Alexander and Krichel, Frank},
  title     = {Considerations about the lightning protection system of mains independent renewable energy hybrid-systems - practical experiences},
  year      = {2002},
  abstract  = {In the paper a lightning protection design concept for renewable energy hybrid-systems without power mains connection is described. Based on a risk analysis protection measures against direct strikes and overvoltages are shown in an overview. The design concept is realized exemplarily for the hybrid-system VATALI on the Greek island Crete. VATALI, not lightning protected at that time, was a victim of a lightning strike in the year 2000 causing destructions and damages of some mechanical and electrical components with costs of approx. 60.000 €. The hardware costs for the protection measures were about 15.000 €: about 50\% of the costs are due to protection measures against direct strikes, 50\% are due to overvoltage protection.},
  language  = {en}
}
@misc{OPUS4-21,
  title     = {Fachblatt, Jahrgang 2002; Sonderbeilage Energie},
  organization    = {FH Aachen, University of Applied Sciences},
  year      = {2002},
  abstract  = {Energiecontrolling an der Fachhochschule Aachen Solar-Institut J{\"u}lich: Ziele und Philosophie Forschung und Entwicklung Anwendung und Verbreitung Beratung und Information Ausbildung und Schulung Projektbeispiele Nowum-Energy Ressourceneinsparung auf dem Solar-Campus J{\"u}lich Fachtagung: Energie-Management Pilotprojekt: Umr{\"u}stung von H{\"o}rs{\"a}len mit moderner Geb{\"a}udesystemtechnik},
  language  = {de}
}