Protective relays

Criteria for determining the amount of protection required / H. Ungrad.- Methods of ensuring the reliable performance of protection equipment / H. Ungrad, E. Wildhaber.- Transient phenomena in high-voltage networks and their influence on the design of protection equipment / M. Vitins.- Static distance relays of the series L16, LIU6, LIZ6 / J. Gantner. Detection by line protection of the earth-fault resistance / E. Ilar.- Innovations in generator protection / M. Ilar, J. Zidar, M. Fiorentzis.- Busbar and beaker back-up protection / C. de Veer.- Calculator-controlled test facilities for busbar protections systems / H. Morse, W. Hager, R. Wanner.- Motor protection equipment / P. Magajna, M. Franzl, J. Zidar.- Frequency relays for load shedding / V. Narayan, F. Ritter, H. Ungrad