Siemens 7XG3124 ReyArc24 Technical Manual page 37

The proposed scheme is as follows:
The scheme comprises of RA30 sensors connected to a RA24 Arc Fault Monitor, providing ARC Fault
coverage of the colored protection zones.
The RA24 provides the SARC Logical Node for the operation of Arc Fault Sensors.
The 7SR22 Overcurrent relay subscribes to SARC Goose messages and initiates the required protection
tripping via an Overcurrent Check.
Tripping in this case will be carried out by hardwiring to respective circuit breakers and using binary outputs
from the 7SR22 IED but could also be implemented via Goose by another subscribing IED.
Flexible tripping logic may be implemented in the 7SR22 according to specific application requirements and
may also accommodate different operating arrangements in more complex applications.
©2014 Siemens Protection Devices Limited
SARC Goose
RA24
Figure 8: RA24 Sample Protection Scheme
Chapter 2) 7XG3124 Application Guide
TR1
Upstream Trip:
Hardwired or
Goose
7SR22
Sensor connections to RA24
Downstream Trip
Hardwired or
Goose
Chapter 2 Page 13 of 42