ELC 006 – Electrical Protection and Earthing Step by Step

INTRODUCTION

This is a course intended to provide a comprehensive coverage of substation earthing system
design for safety and protection systems. The course provides comprehensive coverage of
earthing system design and protection systems. A simplied coverage of the basic principles
in earthing design, which involve the measurement and interpretation of soil resistivity, and
some simple calculations for the design of earth resistance for the substation are rst
provided.
It is then followed by the operation of the protection systems which includes the operation
of protection schemes, such as various circuit breakers and power system protection relays.
The issue of what constitutes to an adequate design of the earthing and protection systems
will also be addressed.