Multi-Terminal Line Differential Protection

by Michael Freiburg, OMICRON electronics and Alexander Apostolov, USA

The testing of modern bus protection systems requires consideration of the type of protection being used. The instrument transformers being used to interface the protection system with the process bus also have significant impact on the performance of the protection system during different conditions, as well as the methods and tools required for their testing. The testing of the non-conventional instrument transformer with a low power analog or IEC 61850 sampled values interface devices is the first step in the testing process.  More

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