Electrical Power Cable Engineering, 3rd Edition

20	Lightning Protection of Distribution Cable Systems William A. Thue

CONTENTS

20.1    Introduction

20.2    Surge Protection

20.2.1    Protective Margin

20.2.2    Voltage Rating

20.2.3    Highest Power Voltage

20.2.4    Coefficient of Grounding

20.2.5    Sparkover

20.2.6    Surge Discharge

20.2.7    Insulation Resistance Discharge Voltage

20.3    Wave Shape and Rate of Rise

20.4    Operation of a Surge Arrestor

20.4.1    Air Gaps

20.4.2    Valve Arresters

20.4.3    Metal Oxide Varistor (MOV)

20.5    Natural Lightning Strokes

20.6    Traveling Waves

20.7    Velocity of Propagation

20.8    Proper Connection of Arresters

20.8.1    Lead Lengths

20.8.2    Route of Current Flow

20.8.3    Ground Resistance/Impedance

References

20.1  INTRODUCTION ...