50Bf & 50Bf-I4 Circuit Breaker Fail; Reference; Operate And Reset Level; Operate And Reset Time - Siemens 7SR17 Rho Manual

3.3 50BF & 50BF-I4 Circuit Breaker Fail

3.3.1 Reference

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

3.3.2 Operate and Reset Level

Attribute
I Operate level
op
I Reset level
reset
Repeatability
Variation

3.3.3 Operate and Reset Time

Attribute
t Element basic operate time
basic
Delay 1
t
op
Delay 2
Repeatability
Overshoot
Disengaging time
©2014 Siemens Protection Devices Limited
-10 °C to +55 °C
f - 3 Hz to f + 2 Hz
nom nom
Chapter 3) 7SR17 Rho Performance Specification
Value
0.050... 2.0 xIn
0.005... 2.0 xIn
20... 60000ms
20... 60000ms
Value
100 % Is, 5 % or 1% In
100 % I , 5 % or 1% In
op
1 %
5 %
5 %
Value
< 20ms
t , 1 % or 20ms
CBF1
t , 1 % or 20ms
CBF2
1 % or 20ms
< 2 x 20ms
< 30ms
Chapter 3 Page 43 of 46