A new method for measuring the A. C. resistance of large cable conductors

The most widely used methods available for measuring the a.c. resistance of large cable conductors are reviewed. A new experimental technique which employs an a.c. bridge with a current transformer for 4 terminal impedances is described. Its accuracy is investigated and the possibility of making a high precision calibration is shown. Some experimental results of standard production cable conductors are given. These results allow to conclude that the a.c. resistance of large conductors can be measured with high accuracy both for research purposes and factory tests.