SIMPLE IMPROVED CIRCUIT MODEL FOR FUSE BREAKING TESTS

摘要

A simple shunt circuit can be used to provide a useful correction to the standard source model to get more accurate calculations of the circuit current in the modelling of fuse breaking tests. In the test results analysed the error in the standard model was associated mainly with shunt losses, which increase as the fuse voltage rises at the start of arcing. The nature of the high-power test laboratory plant and its connection varies between installations, and so the circuit discussed here may not be the most appropriate for other situations. However whatever the arrangement of plant, it is likely that medium frequency effects in the source circuit will need to be taken into account to obtain a good match between measured and computed transients.