7SR18 Performance Specification
Unrestricted ©2018 Siemens Protection Devices Limited Page 39
Section 3: Supervision Functions
3.1 46BC Broken Conductor
3.1.1 Reference
Parameter Value
NPS to PPS ratio 20,21…100 %
t
f
Delay setting 0.03,04,20.0,20.1,100,101,1000,1010…..14400 s
3.1.2 Operate and Reset Level
Attribute Value
I
curr
Operate level 100 % I
set
± 5 %
Reset level
90 % I
curr ,
± 5 %
Repeatability
± 1 %
Variation
-10 °C to +55 °C ≤ 5 %
nom
± 5 %
harmonics to f
≤ 5 %
3.1.3 Operate and Reset Time
Attribute Value
Basic operate time 1x In to 0 A 40 ms
Operate time t
f
+ t
basic
,
1 % or
20 ms
Repeatability ± 1 % or ± 20 ms
Variation
f
nom
± 5 %
harmonics to f
cutoff
≤ 5 %