von Bonin - AEG Aktiengesellschaft Federal Republic of Germany
Brugger - AEG Aktiengesellschaft Federal Republic of Germany
Hinterthur - AEG Aktiengesellschaft Federal Republic of Germany
Kirchesch - AEG Aktiengesellschaft Federal Republic of Germany

Synthetic test methods are an unwaivable tool for testing and development of modern circuit breakers. This paper describes a synthetic test facility which is based on the well- known current injection method. The circuit will-be described, the thoretical considerations and real test will bediscussed.