... R)N-40.5(24kV available) vacuum disconnect load break switch(Short for LBS, load switch or switch disconnector) and fuse combination apparatus is ... long mechanism life, there is an security leakage between main switch,disconnect blade and earthing blade, it can operate frequently.It according ... of GB16927, IEC420 & IEC62271-105. Indoor Vacuum Load break switch(load switch, switch disconnecter,LBS)