Electric Power Substations Engineering, 3rd Edition

3

Air-Insulated Substations: Bus/Switching Configurations

Michael J. Bio

Alstom Grid

3.1    Introduction

3.2    Single Bus Arrangement

3.3    Double Bus–Double Breaker Arrangement

3.4    Main and Transfer Bus Arrangement

3.5    Double Bus–Single Breaker Arrangement

3.6    Ring Bus Arrangement

3.7    Breaker-and-a-Half Arrangement

3.8    Comparison of Configurations

3.1  Introduction

Various factors affect the reliability of an electrical substation or switchyard facility, one of which is the arrangement of switching devices and buses. The following are the six types of arrangements commonly used:

1.  Single bus

2.  Double bus–double breaker

3.  Main and transfer (inspection) bus

4.  Double bus–single breaker

5.  Ring bus

6.  Breaker-and-a-half ...