Transcription of Lightning and surge protection - basic principles
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Lightning and surge protection - basic principles
Lightning and surgeprotection - basic principles October 2016AN904-1002 Rev IApplication noteMTL surge protectionCONTENTS ..Page1 INTRODUCTION ..1 The need for surge protection ..1 surge protection devices (SPDs) ..12 Lightning ..2 Introduction ..2 Generation of atmospheric discharges ..2 Lightning conductors and buildings ..2 Lightning -induced transients ..3 Transient specifications ..33 surge protection COMPONENTS ..4 Introduction ..4 Arc or carbon spark gaps ..4 Gas discharge tubes ..4 Zener diodes ..5 Metal oxide varistors ..5 Fuses ..6 surge relays ..6 Circuit breakers ..6 Multistage hybrid circuits ..64 surge protection DEVICES (SPDs) ..6 Introduction ..6 basic multistage hybrid circuits ..65 ..8 The need for protection ..8 Loop protection general ..8 SPD selection general.
return stroke has usually the highest magnitude of the multiple stroke series. The heating effect of this current on the atmosphere produces the violent air expansion which we recognize as a thunder-clap. The initial leader stroke and main return stroke are generally followed by sub - sequent leaders and return strokes in rapid succession.
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