High-Frequency Tower Footing Resistance Measurement Explained | 25 kHz Earth Resistance Testing

High-Frequency Tower Footing Resistance Measurement Explained | 25 kHz Earth Resistance Testing. In this video, we explain the complete theory and practical procedure of High-Frequency Tower Footing Resistance Measurement used in transmission lines. Learn why conventional 128 Hz earth resistance measurement can produce errors in transmission towers due to parallel grounding paths through adjacent towers and how the high-frequency method (typically 25 kHz) overcomes this problem. Topics covered: • Conventional three-point earth resistance measurement • Effect of adjacent towers on footing resistance measurement • Role of overhead earth wire in measurement errors • Why 25 kHz current is used • Inductive reactance of earth wire at high frequency • Placement of current probe and potential probe • 62% method explained • Interpretation of resistance versus probe distance curve • Measurement of tower footing resistance without disconnecting the earth wire This video is useful for electrical engineers, transmission line engineers, substation engineers, maintenance personnel, engineering students, and utility professionals. Visit CircuitMasterClass.com for detailed technical articles and tutorials on power systems, transmission lines, substations, grounding systems, and protection engineering. #TowerFootingResistance #EarthResistance #GroundingSystem #TransmissionLine #ElectricalEngineering Link of our website : https://circuitmasterclass.com/ Link of our website : https://circuitmasterclass.com/