Measuring probe for fast transients monitoring in gas insulated substation

This paper describes the construction of four probes adjusted for fast transient monitoring in 123 kV SF/sub 6/ insulated substations. The primary requirement was the ability to monitor without distortion very fast transients containing frequencies up to 200 MHz. The measuring system was tested and calibrated with the help of computer modeling techniques. The verified experimental apparatus was then used for testing and calibrating the measuring probes. During the test, various effects on the measuring system characteristics were analyzed with respect to materials used for the components of the system.