Daftar Isi:
  • The built of this protection relay undervoltage and overvoltage based on microcontroller is a tool of protection system used for protecting electrical tools from undervoltage or overvoltage on the electrical line. That cause damage for the tool. This protection relay can make an innovation because it has economic but still completing the rule of a good protection relay, those are selectif, good and sensitive. At this built used microcontroller of Arduino Uno as the main tool of control system. Microcontroller can get input from potential transformator as a voltage sensor, and then compare it from the voltage by view with voltage from setting. If it get more then the setting voltage the relay will compare back with setting time and then relay will active. So it can saving electrical tools from damaging because of undervoltage and overvoltage.