7SR21 & 7SR22 Performance Specification
Unrestricted © 2013 Siemens Protection Devices Limited
Page 57 of 68
3.2
50BF & 50BF-I4 Circuit Breaker Fail
3.2.1 Reference
Parameter
Value
Is
50BF Setting
0.050, 0.055… 2.0 x
In
Is
50BF-I4 Setting
0.005, 0.01… 2.0 x
In
t
CBF1
Stage 1 Delay setting
20, 25… 60000ms
t
CBF2
Stage 2 Delay setting
20, 25… 60000ms
3.2.2 Operate and Reset Level
Attribute
Value
I
op
Operate level
100 %
Is
,
±
5 % or
±
1%
In
I
reset
Reset level
<
100 %
I
op
,
±
5 % or
±
1%
In
Repeatability
±
1 %
Variation
-10 °C to +55 °C
£
5 %
f
nom
- 3 Hz to
f
nom
+ 2 Hz
£
5 %
3.2.3 Operate and Reset Time
Attribute
Value
t
basic
Element basic operate time
< 20 ms
t
op
Stage 1
t
CBF1
,
±
1 % or
±
20 ms
Stage 2
t
CBF2
,
±
1 % or
±
20 ms
Repeatability
±
1 % or
±
20 ms
Overshoot
< 2 x 20 ms
Disengaging time
< 30 ms
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 ...
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