Chapter 2) 7XG3124 Application Guide
©2014 Siemens Protection Devices Limited
Chapter 2 Page 12 of 42
2.2 Arc Fault Scheme
The single line schematic arrangement of the application example is shown in the diagram below:
TR1
TR1 LT CB
Feeder 1A CB
Arc Fault coverage is to be provided to the bus, circuit breaker chambers and cable termination chambers
and shall be current checked with an overcurrent relay. Tripping shall be zoned to provide sectionalizing and
minimize affected plant.
Figure 7: Single Line Arc Fault Scheme