Experiences Gained on Artificial Lines for Synthetic Testing Under Short Line Fault Conditions

Different types of artificial lines for synthetic circuits suitablefor simulating an actual short circuited line in the wide fault conditions occurring in the net work were built up. Practical conclusions on the line elements design and on the performance of the differ ent lines were obtained. Particular care has been taken in analysingthe initial portion of line transient recovery voltage. The artificial line, which more strictly reproduces the transient recovery voltage of an actual line taking into account extreme fault conditions, is outlined. Testing problems concerning the contribution to the TRV of the supply circuit are reported.