7SR210 & 7SR220 Description of Operation
Unrestricted ©2018 Siemens Protection Devices Limited
Page 49 of 94
3.12 Current Protection: Arc Flash Detector (50 AFD)
By employing an optical detection technique, Arc Fault Protection results in fast clearance of arcing faults.
Arc fault protection is achieved in the relays via the 7XG31xx series of equipment being connected to the binary
inputs.
Should the sensor operate when the current is above the
50AFD Setting
then an output signal will be initiated.
Refer to 7XG31 documentation for further details.
&
Enabled
Disabled
50AFD
Setting
c
I
A
I
B
I
C
&
50AFD
Arc Detector
Binary Input
AFD Zone 1
AFD Zone 1 Flash
AFD Zone 6 Flash
AFD Zone 6
AFD Zone 1 Flash
AFD Zone 6 Flash
50 AFD
50 AFD PhA
50 AFD PhB
50 AFD PhC
Figure 3.12-1 Logic Diagram: Arc Flash Detector (50 AFD)
Summary of Contents for Argus 7SR21
Page 1: ...Energy Management 7SR21 7SR22 Argus Overcurrent Relay Reyrolle Protection Devices ...
Page 2: ......
Page 4: ...Contents 7SR11 and 7SR12 Page 2 of 2 2018 Siemens Protection Devices Limited ...
Page 185: ...7SR210 Settings Guide Unrestricted 2018 Siemens Protection Devices Limited Page 61 of 61 ...
Page 277: ...7SR220 Settings Guide Unrestricted Page 72 of 107 2013 Siemens Protection Devices Limited ...
Page 382: ...7SR220 Technical Manual Chapter 4 Page 2 of 96 2017 Siemens Protection Devices Limited ...
Page 386: ...7SR220 Technical Manual Chapter 4 Page 6 of 96 2017 Siemens Protection Devices Limited ...
Page 398: ...7SR220 Technical Manual Chapter 4 Page 18 of 96 2017 Siemens Protection Devices Limited ...
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