WO9610859-A  INTELEC 80 TENTH INTERNATIONAL TELECOMMUNICATIONS ENERGY CONFERENCE, 30.Oktober 1988 - 2.November 1988 SAN DIEGO-USA, Seiten 174-179, XP 000079134 UEKI ET AL 'telecommunications powering system';  INTELEC 89-CONFERENCE PROCEEDINGS, 15. - 18.Oktober 1989 FIRENZE, Seiten 11.8.1-11.8.7, XP 000130011 FORLANI 'integrated power station';  INTELEC 91 THIRTEEN INTERNATIONAL TELECOMMUNICATIONS ENERGY CONFERENCE, 5. - 8.November 1991 KYOTO,JAPAN, Seiten 227-232, XP 000314585 MARQUET ET AL 'new power supply structure for telecom equipments toward a unique level of conversion';  INTELEC 92-FOURTEENTH INTERNATIONAL TELECOMMUNICATIONS ENERGY CONFERENCE, 4. - 8.Oktober 1992 MARIOTT,USA, Seiten 359-364, XP 000357551 MODEL ET AL 'a new dc power plant architecture for centralized or decentralized applications'WO9610859-A1  INTELEC 80 TENTH INTERNATIONAL TELECOMMUNICATIONS ENERGY CONFERENCE, 30/10/1988 - 02/11/1988 SAN DIEGO-USA, Seiten 174-179, XP 000079134 UEKI ET AL "telecommunications powering system";  INTELEC 80 TENTH INTERNATIONAL TELECOMMUNICATIONS ENERGY CONFERENCE, 30/10/1988 - 02/11/1988 SAN DIEGO-USA, pages 174-179, XP 000079134 UEKI ET AL "telecommunications powering system";  INTELEC 89-CONFERENCE PROCEEDINGS, 15/10/1989 - 18/10/1989 FIRENZE, Seiten 11.8.1-11.8.7, XP 000130011 FORLANI "integrated power station";  INTELEC 89-CONFERENCE PROCEEDINGS, 15/10/1989 - 18/10/1989 FIRENZE, pages 11.8.1-11.8.7, XP 000130011 FORLANI "integrated power station";  INTELEC 91 THIRTEEN INTERNATIONAL TELECOMMUNICATIONS ENERGY CONFERENCE, 05/11/1991 - 08/11/1991 KYOTO,JAPAN, Seiten 227-232, XP 000314585 MARQUET ET AL "new power supply structure for telecom equipments toward a unique level of conversion";  INTELEC 91 THIRTEEN INTERNATIONAL TELECOMMUNICATIONS ENERGY CONFERENCE, 05/11/1991 - 08/11/1991 KYOTO,JAPAN, pages 227-232, XP 000314585 MARQUET ET AL "new power supply structure for telecom equipments toward a unique level of conversion";  INTELEC 92-FOURTEENTH INTERNATIONAL TELECOMMUNICATIONS ENERGY CONFERENCE, 04/10/1992 - 08/10/1992 MARIOTT,USA, Seiten 359-364, XP 000357551 MODEL ET AL "a new dc power plant architecture for centralized or decentralized applications";  INTELEC 92-FOURTEENTH INTERNATIONAL TELECOMMUNICATIONS ENERGY CONFERENCE, 04/10/1992 - 08/10/1992 MARIOTT,USA, pages 359-364, XP 000357551 MODEL ET AL "a new dc power plant architecture for centralized for decentralized applications"