Afd Arc Flash Detector; (Refer To 7Xg31 Technical Manual For Performance Characteristics); Reference; Operate And Reset Level - Siemens Argus 7SR21 Technical Manual

2.25 50 AFD ARC Flash Detector

(Refer to 7XG31 Technical Manual for performance characteristics)

2.25.1 Reference

Parameter
50 AFD Setting

2.25.2 Operate and Reset Level

Attribute
I Operate level
op
Transient overreach (X/R £ 100)
Reset level
Repeatability

2.25.3 Operate and Reset Time

Attribute
t 50AFD Overcurrent operate time
basic
t AFD Zone operate time (Flash & 50AFD)
op
Repeatability
Disengaging time
Unrestricted © 2013 Siemens Protection Devices Limited
7SR21 & 7SR22 Performance Specification
Value
1, 2,...10 xIn
Value
100 % Is, ± 10 %
£ -30 %
³ 95 % I
op
± 5 %
Value
10 ms – 16 ms
15 ms – 25 ms
± 10 ms
< 50 ms
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