| Let's discuss capacitor banks, but this time, not the basics. Let's study the double-star capacitor bank configuration and protective techniques used in the substations. How important is to choose the right current transformer ratio, calculate rated and maximum overload currents, and calculate fault MVA % impedance? What about over-voltage protection, transformer ratios, pickup levels, trip delays, and reset delays? This article unfolds with a detailed exploration of the double-star configuration adopted for the capacitor bank within the substation, coupled with the intricacies of the selected protection strategies. The discussion delves into the operation of neutral overcurrent differential protection, shedding light on its efficacy in distinguishing between imbalances caused by voltage variations and those arising from internal faults in the capacitor bank. | 
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