Electrical transmission lines square measure at risk of faults and failures. Once a fault happens, it's not possible most of the days to repair it manually. A fault on a high voltage line affects the power system stability that generally results in permanent injury of the instrumentation. Relays square measure developed and put in to shield the lines. The conductor protection relays, within the trade, square measure supported the elemental frequency parts of the voltages and currents. These

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... ys want a minimum of one first harmonic cycle for playacting the protection operation. Voltage and current traveling waves square measure generated once a fault happens on the conductor. The speed of propagation of traveling waves is finite and also the level of the waves decreases with increase within the distance traveled. Data concerning the fault may be obtained by analyzing the traveling waves. This paper presents the transmission line protection system using wavelet multi-resolution analysis. The faulted current and voltage signal get transfer into multi-resolution analysis the after analysis this transfer to threshold based system. That threshold system operates the circuit breakers connected at the each end of transmission line by sending trip signal during abnormal faulted condition occurs. An improved simulation software using MATLAB was developed to study the proposed fault diagnosis techniques. Comprehensive performance studies were implemented and the test results validated the enhanced performance of the proposed approach over the traditional fault diagnosis performed by the transmission line distance relay.