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Surge Protection Techniques in Low-Voltage AC Power Systems François D. Martzloff  General Electri c Com pany Schenectady NY Reprinted , w ith permission, from Proceedings, IN TELEC '79 (International Telecommunications Energy Conference), 1979 Significance Part 6: Tutorials, textbooks and reviews  A tu to ria l r ev iew pape r d escr ib ing th e or ig ins of surge vo lta ge s an d th e st an da rd iza tio n ef fo rts to characterize these surges. The principl es of operation are described for “crowbar devices” (now generally descri bed under the standardized name of “voltage switchi ng devices”) and for “volt age clam ping devices: (now generally described under the standardized nam e of “voltage li miting devices”). Fai lure modes are aslo discussed. Briefl y m entions one of the early experi men ts to investigate the coordination between a voltage-switching arrester and a downstream varistor that gained growing recogniti on in the eighti es and nineties. That subject is addressed by several subsequent papers in Part 8 of the SPD Anthology.

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