BEHA-AMPROBE KMP7030 测试器, 接地回路阻抗
The loop tester is a quick, convenient, and highly specific method of evaluating an electrical circuit for its ability to engage protective devices circuit breakers, fuses, RCD"s. A loop is defined by including unsuspected elements, where current has found parallel paths to ground. Because a ground loop determines the effectiveness of protective devices, it is crucial to be able to measure it, in order to detect and correct problems.