SENTRON 3NP1 fuse switch disconnectors, proven switch disconnectors and in-line switch disconnectors with and without fuses – we offer everything for economical, safe and reliable switching and protecting. Whenever electrical systems have to be manually switched on or off, manual switching devices are reliable when called upon. These switching devices have been perfectly developed and adjusted down to the last detail to suit the switching of loads and control processes. Where systems and loads are controlled by means of electric signals, electrical switching devices such as remote control switches, switching relays or Insta contactors are used. Safety, comfort and power saving - these characterize automatic switching.