The Linascope Transmission Line Fault Locator

A pulse-type echo ranging fault locator has been developed which is suitable for locating sustained faults on telephone and power transmission lines. A number of these instruments have been in service for several years. They have been used to locate a wide variety of power and telephone line faults with significant reductions in service interruptions and economies in line patrolling. Before a new circuit is energized it may be tested with the linascope to ensure that all construction grounds have been removed and that all transpositions are correct. Telephone circuits also may be tested to locate sources of mismatch which introduce transmission losses. An automatic fault locator has been developed, which operates on the same principle and which automatically records the locations of sustained or transient power line faults.