Zobrazeno 1 - 10
of 128
pro vyhledávání: '"R.J. Marttila"'
Publikováno v:
IEEE Transactions on Power Delivery. 11:1367-1372
In principle, capacitor switching disturbances can be eliminated by closing individual breaker poles when the gap voltage is zero. In practice random variations in pole timing, and prestrikes due to finite closing speed, limit the reduction possible.
Publikováno v:
Electric Power Systems Research. 36:181-190
Most protection and control equipment is usually tested in the open-loop mode. However, closed-loop testing is often the only cost-effective approach. This paper highlights the areas where closed-loop testing of protective relays and control equipmen
Autor:
R.J. Marttila
Publikováno v:
IEEE Transactions on Power Delivery. 7:1167-1178
It is shown that the applicability of memory-polarized distance relay mho elements to the protection of MOV (metal oxide varistor) protected series-compensated lines is dependent on the system configuration, line loading, the location of the potentia
Autor:
R.J. Marttila
Publikováno v:
6th International Conference on Developments in Power Systems Protection.
Fundamental-frequency models of protective relays can play an important role in the testing and evaluation of the relays' suitability in complex applications. This paper describes a process for evaluation of distance protection for application in ser
Autor:
K. J. Koski, R.J. Marttila
Publikováno v:
Acta neurologica Scandinavica. 81(4)
We prospectively identified patients with transient global amnesia in an urban population of 163,000. In 1982, 16 patients experienced their first transient global amnesia. The annual incidence rate was 10 per 100,000 population, and 32 per 100,000 a
Autor:
R.J. Marttila
Publikováno v:
IEEE Transactions on Power Apparatus and Systems. :96-102
A general study of the effect of line loading on the response of mho elements oth reverse faults has necessitated the development of an alternate method of representing the response of various types of mho elements. This paper reviews the usual metho
Publikováno v:
Neuroepidemiology. 1:209-215
The occurrence of various tremors was investigated by surveying residents over 40 years of age in a Finnish rural area. After a preliminary personal or postal investigation of the basic study populati
Autor:
P. Germann, Francine Fontaine, L. Hammarström, Yukito Shinohara, C. Cerri, Johan F. Jongkind, W. Cendrowski, M. Streifler, T. Caraceni, Gian Luigi Lenzi, Velupillay Vignaendra, P. Livrea, Tetsuo Owada, Å. Sidén, G. Scarlato, C. Thelin, S. Genco, V. Ionasescu, K.-H. Holbach, E.M. Lumb, F. Girotti, Ernst-Peter Strecker, A. Probst, Everette James, L. Di Reda, D. Linke, T.N. Calvey, C. Caltagirone, Emanuele La Torre, H.E. Kaeser, A.E.H. Emery, M. Abbruzzese, J. Lapresle, R. Carasso, A. Hecker, Aldo Fortuna, I. Sarova-Pinhas, Beng Hock Chong, D. Vassilopoulos, V.M. Kazakov, Jocelyne Bachevalier, Yutaka Maki, P. Giovannini, G. Papagno, Fumio Gotoh, Ph. Heitz, Cesare Fieschi, J. Rusnák, J.J. Askenasy, A.B. Boiardi, J. Turgman, S. Ratto, G. Avanzini, T. Gasser, H. Zellweger, U.K. Rinne, A.A. Skorometz, Ldszló Szegedy, Owen B. Ellington, Hirotoshi Umezaki, E.A. Caspary, M. Popper, G. Gainotti, Nobuyoshi Ishii, J. Ulrich, M.G. Albizzati, G. Dumermuth, Rodolfo L. Guiang, O. Nilsson, K.G. Kjellin, Giovanni Meola, W. Emser, Toshiki Kitahara, F.M. Puca, L. Cigánek, R.J. Marttila, E.P. Mikhailov, S. Negri, T. Siegal, R. Minkenberg, G. Miceli, C. Loeb, L.M. Specchio, Fumie Yamaguchi, K. Lewit, L. Kahn, M. Herdan, P. Cancilla, Ah Hoo Ang, O. Vuia, W. Sobczyk, H. Wassmann, S. Bassi, K. Schimrigk, K. Chan, B. Lange, Thérèse Botez, Erminio Capitani, Masaaki Kano, Shizuo Shirai, F. Glivjak, G. Sacco, R. Ionasescu, Gary R. Novak, L. Frattoła, Thiam Ghee Loh, W. Tackmann, Masaru Kuriyama, Hans Spinnler, T.M. Kovalenko, M.I. Botez, P. Salisachs, E. Smith, J. Braham
Publikováno v:
European Neurology. 16:I-IV
Autor:
U.K. Rinne, R.J. Marttila
Publikováno v:
European Neurology. 16:73-78
The comparison of the blood pressures of 273 patients with Parkinson's disease and of controls matched in sex and age revealed that Parkinsonian patients had a lower systolic blood pressure and more rarely suffered from clinical hypertension than did
Autor:
R.J. Marttila
Publikováno v:
IEEE Transactions on Power Delivery. 3:1466-1474
The performance characteristics of a polyphase element for the detection of phase faults is examined. The results show the effect of transmission line loading and reach setting on the detection characteristics of forward faults. The polyphase element