Ra24 Sarc Allocation; Table 1: Ra24 Sarc Allocationprotection Zone Tripping; Table 2: Ra24 Protection Zone Tripping - Siemens 7XG3124 ReyArc24 Technical Manual

Chapter 2) 7XG3124 Application Guide

2.3 RA24 SARC Allocation

In the proposed scheme we have 6 Arc Fault Sensors installed providing coverage for 5 distinct protection
zones. The individual SARCs are allocated as follows :
Zone Coverage
Feeder Exit
Termination Chamber
Feeder CB Chamber
Bus
Incomer CB Chamber
Incomer Termination
Chamber
The required circuit breaker tripping is defined by the following tripping table :
SARC Operation
SARC 1
SARC 2
SARC 3 or SARC 4
SARC 5
SARC 6
©2014 Siemens Protection Devices Limited
Colour

Table 1: RA24 SARC AllocationProtection Zone Tripping

Zone Coverage
Feeder Exit
Termination Chamber
Feeder CB Chamber
Bus
Incomer CB Chamber
Incomer Termination
Chamber

Table 2: RA24 Protection Zone Tripping

Number of Sensors
1
1
2
1
1
Colour
SARC Allocation
SARC 1
SARC 2
SARC 3
SARC 4
SARC 5
SARC 6
Trip
1A CB
TR1 LT CB
TR1 LT CB
Upstream
Upstream
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