The target of this paper is to diminish the computational time of separation handing-off of transmission line utilizing Fast S-transform (FST). Separate transferring may require a quicker and more accurate estimation of the phasor of the fault current and voltage signals, which are utilized to register clear hindrance for creating the stumbling signal in case when a fault occurs. Customary S-transform is reversible time-frequency unearthly limitation procedure that integrates the components of wavelet and brief time Fourier transformation. The working (handling) time of traditional S-transform is large and in this manner, not appropriate for applications like advanced assurance of transmission lines. FST decreases the computational weight by using down examining. So FST can unquestionably supplant the current DFT construct calculation for with respect to line computerized separate handing-off undertaking in expansive power transmission organizing. © Springer Nature Singapore Pte Ltd. 2018.