Password Based Circuit Breaker for Lineman Protection using Microcontroller 8051

Electrical line man safety in power systems is a major concern. Therefore, a new concept of password-based system has been introduced. Fatal electrical accidents while repairing the power line to the line man are increasing day by day. The accidents occur due to the lack of communication and coordination between the maintenance staff and the electric substation staff. Therefore, to ensure safety of lineman, password-based circuit breakers can be installed. If certain sections of the line need to be repaired then a password has to be entered through a matrix keypad to switch the circuit breaker ON/OFF. When the line is repaired, the lineman again enters the password, if the password is matched with the circuit breaker, then it will turn ON/OFF particular section of the line during maintenance, without any external interference from substation staff and can thus, help in saving human lives.