Tài liệu Calculation sheet - Station Grounding Grid pdf

Calculation sheet Station Grounding Grid

Rev. 1 i

CONTENTS

1.0 GENERAL........................................................................................................1

2.0 REFERENCES.................................................................................................1

3.0 CALCULATION................................................................................................1

3.1 General ..................................................................................................................................... 1

3.2 Conductor Size Calculation...................................................................................................... 1

3.3 Check of touch voltage and step voltage .................................................................................. 2

3.4 Initial Design Parameters ......................................................................................................... 3

3.5 Grid Resistance......................................................................................................................... 3

3.6 Maximum Grid Current............................................................................................................ 4

3.7 Ground Potential Rise............................................................................................................... 4

3.8 Calculation of Mesh & Step Voltages ...................................................................................... 4

3.9 Verification on suitability of conductor length (L)................................................................... 6

4.0 CONCLUSION .................................................................................................6