Design and Construction of a Programmable Password Operated Circuit Breaker

Abstract

The circuit breaker plays the role of electrical switch which is operated
automatically during electrical fault and overload. Due to poor
communication between lineman and electric substation personnel,
fatal accidents have been recorded overtime when operating on the
circuit breakers. To this effect, this work is centered on the design of a
passworded circuit breaker which can only be operated by authorized
persons. The work was carried out by using an 8-bit microcontroller.
The microcontroller is connected with a keypad which is used to enter
the password and the password is stored in an Electrical Erasable
Programmable Read-Only Memory (EEPROM). The device was
actuated as the password was rightly provided. Result obtained for the
current limit test was satisfactory even with the little deviations due to
expected fluctuations in the load current