In addition to the general requirements of IEC 60077-2, this part of IEC 60077 gives rules for AC circuit-breakers, the main contacts of which are connected to AC overhead contact lines; the nominal voltage of these circuits being in accordance with IEC 60850.Cross References:IEC 60529IEC 62271-102IEC 61373EN 60060-1:2010IEC 62271-100:2008/AMD1:2012EN 60077-2:2017IEC 62271-1:2017IEC 62271-100:2008EN 62271-100:2009/A2:2017EN 60077-1:2017IEC 60077-2:2017IEC 60077-1:2017IEC 62271-100:2008/AMD2:2017EN 62271-100:2009/A1:2012EN 62271-100:2009IEC 60060-1:2010EN 62271-1:2017IEC 60571IEC 60850IEC 60050-441:1984/AMD1:2000IEC 60050-441:1984All current amendments available at time of purchase are included with the purchase of this document.