Specifications

7SR242 Duobias Performance Specification
©2010 Siemens Protection Devices Limited Chapter 3 - Page 18 of 45
2.3 46BC Open Circuit
2.3.1 Reference
Parameter Value
I
set
NPS to PPS ratio 20,21…100%
t
f
Delay setting 0.03,04,20.0,20.1,100,101,1000,1010…..14400 s
Is
46BC-n U/I Guard Setting 0.05, 0.10…5.0 xIn
2.3.2 Operate and Reset Level
Attribute Value
I
curr
Operate level: NPS to PPS ratio
100 % I
set
r 5 %
Reset level
90 % I
curr ,
r 5 %
Repeatability
r 1 %
-10 °C to +55 °C
d 5 %
Variation
f
nom
- 3 Hz to f
nom
+ 2 Hz
harmonics to f
cutoff
d 5 %
Attribute Value
I
op
Operate level: 46BC-n U/I Guard Setting
100 % Is, r 5 % or r 1% In
Reset level
d 105 % I
op
Repeatability
r 1 %
-10 °C to +55 °C
d 5 %
Variation
f
nom
- 3 Hz to f
nom
+ 2 Hz
d 5 %
2.3.3 Operate and Reset Time
Attribute Value
t
basic
Basic operate time 1x In to 0 A 40 ms
Operate time
t
f
+ t
basic
, r 1 % or r 20ms
Repeatability
r 1 % or r 20ms
Variation
f
nom
- 3 Hz to f
nom
+ 2 Hz
harmonics to f
cutoff
d 5 %