Consumption of electrical energy has steadily increased due to industrial, commercial and demographic growth. In order to deliver constant power to consumers, reliability is an important factor that power companies must take into account. Common disturbances on transmission lines resulting from various faults such as line to line, single line to earth, double line to earth and faults between three lines affect the stability of the electric supply. This paper seeks to demonstrate the behavior of transmission line signals due to disturbances caused by different types of faults and to identify the effect of faults on transmission lines as well as on the bus assembly. Simscape Power tool available in MATLAB/Simulink environment was used to model the 33 kV, 105 km transmission line. Its simulation made it possible to obtain the voltage and the current wave forms in the transmission network during the occurrence of different fault types. The electrical faults cause down time equipment damage and, thus, present a high risk to the integrity of the power grid. After various fault analysis of the power line from Lutchurukuru to Kindu, the circuit breakers to be placed at the transmitting and receiving ends of this power line were selected with the aim of reinforcing the power line protection system. Hence, the circuit breakers at the transmitting end (Bus 2) of the line must have a breaking capacity of 4.376 MA, a voltage of 34.5 kV, a number of cycles for the fault interruption time of 5 and a sub transient fault current of 49.15 A, while the ones placed at the receiving end (Bus 7) of the line must have a breaking capacity of 497.5 kA, a voltage of 34.5 kV, 5 number of cycles for fault interruption and a sub transient fault current of 5.6 A.