When super tuned, the electrical harmonic filter turns a multitasker that eliminates harmonics, maintains power system stability by mitigating power surge, voltage fluctuation, and resonance. A super tuned harmonic filter is an engineering tool that prevents power plant blackout by stabilizing power system parameters for a successful grid de-synchronization, and islanding power generators on utility power failure. Besides, it relives station generators from momentary voltage fluctuations and power surges over a grid or internal power disturbance which helps in eliminating premature winding insulation failure of the generator.