Transmission of energy via overhead transmission lines is a common way for power distribution in this critical service. The location of the fault must be determined in order to recover from the failure. While there is some human error in defect identification, technology-assisted solutions can save time and costs. Some potential fault detection methodologies for effective detection failure in power transmission are proposed in this study. This project is about designing a discrete relay that detects when the input value exceeds the reference value set in the relay and sends a trip signal to the circuit breaker. The tripping action is mostly determined by the voltage and current waveforms obtained during the malfunction at the relay location. Wavelet analysis, a mathematical method for signal analysis, is used to detect and classify the type of transmission line fault. During a fault, the Discrete Wavelet Transform (DWT) is utilized to analyse the current waveform. Fault signals are generated using MATLAB/Simulation. The simulation results show that the suggested fault detection indicator performs well and is simple to implement for computer relaying applications.