Development of a New Type Fault Locator Using the One-Terminal Voltage and Current Data

A new type fault locator has been developed, that calculates the reactance of a faulty line, with a micro-processor, using the one-terminal voltage and current data of the transmission line. Errors caused by various factors such as load flow, fault resistance, and the unsymmetrical arrangement of the transmission line, are automatically corrected. The equipment is now under field test, and during the nine months of the field test, the equipment has operated satisfactorily.