Author

Helmut Ungrad

2 books found

Cover of Protection Techniques in Electrical Energy Systems

Protection Techniques in Electrical Energy Systems

Helmut Ungrad, Willibald Winkler, Andrzej Wiszniewski · First published 2020

Cover of Schutztechnik in Elektroenergiesystemen

Schutztechnik in Elektroenergiesystemen

Helmut Ungrad, Willibald Winkler, Andrzej Wiszniewski · First published 1991 · Latest edition 1994