50Bf & 50Bf-I4 Circuit Breaker Fail; Reference; Operate And Reset Level; Operate And Reset Time - Siemens Argus 7SR21 Technical Manual

3.2 50BF & 50BF-I4 Circuit Breaker Fail

3.2.1 Reference

Parameter
Is 50BF Setting
Is 50BF-I4 Setting
t Stage 1 Delay setting
CBF1
t Stage 2 Delay setting
CBF2

3.2.2 Operate and Reset Level

Attribute
I Operate level
op
I Reset level
reset
Repeatability
Variation

3.2.3 Operate and Reset Time

Attribute
t Element basic operate time
basic
Stage 1
t
op
Stage 2
Repeatability
Overshoot
Disengaging time
Unrestricted © 2013 Siemens Protection Devices Limited
-10 °C to +55 °C
+ 2 Hz £ 5 %
f - 3 Hz to f
nom nom
7SR21 & 7SR22 Performance Specification
Value
0.050, 0.055... 2.0 xIn
0.005, 0.01... 2.0 xIn
20, 25... 60000ms
20, 25... 60000ms
Value
100 % Is, ± 5 % or ± 1% In
<100 % I , ± 5 % or ± 1% In
op
± 1 %
£ 5 %
Value
< 20 ms
, ± 1 % or ± 20 ms
t
CBF1
, ± 1 % or ± 20 ms
t
CBF2
± 1 % or ± 20 ms
< 2 x 20 ms
< 30 ms
Page 57 of 68