Siemens 7SR12 Argus - 67;67 N Directional Overcurrent & Earth Fault; Reference; Operate Angle; Operate Threshold

7SR11 & 7SR12 Performance Specification
©2017 Siemens Protection Devices Limited Chapter 3 Page 49 of 56
2.21 67/67N Directional Overcurrent & Earth Fault
2.21.1 Reference
Parameter Value
θ
s
Angle setting
-95…+95 °
I
Applied current
In
V
Applied voltage 110 V phase-phase (63.5 V phase-earth)
2.21.2 Operate Angle
Attribute Value
CA
Characteristic angle (I with respect
to V)
θ
s
, ± 5 °
Operating angle
forward
CA - 85 ° ± 5 ° to CA + 85° ± 5 °
reverse
(CA - 180°) - 85° ± 5 ° to (CA - 180°) + 85° ± 5 °
Variation in
characteristic
angle
10°C to +55°C
± 5 °
f
nom
± 5 %
± 5 °
2.21.3 Operate Threshold
Attribute
Value
Minimum levels for
operation
I (p/f)
> 5 % In
I (e/f)
> 10 % In
V (p/f)
> 1 V
V (e/f)
> 1 V
2.21.4 Operate and Reset Time
Attribute Value
Operate time
typically 32, < 40 ms at characteristic angle
+ 50/51 element operate time
Reset time typically < 65 ms at characteristic angle