Technical Brochures "Technical Brochures" issued by SC 21 and SC B1 can be purchased by members of CIGRE and non members. The catalogue of Publications lists all these elements, with a short abstract and the price. Recent publications: Earth potential rises in specially bonded screen systems - June 2008 Statistics of AC underground cable in power networks - December 2007 Revision of qualification procedures for HV and EHV AC extruded underground cable systems - August 2006. List of Technical Brochures published by SC B1 (2002-to date) (pdf, 20 kb) List of Technical brochures published by SC 21 (1969-2001) (pdf, 12 ko) Technical brochures can be downloaded in electronic format, free of charge, for CIGRE Members or ordered for non CIGRE Members. Paper Copies have always to be bought. To download or order