Siemens 7SR224 - 67;67 G;67 SEF Directional Overcurrent & Earth Fault; Reference; Operate Angle; Operate Threshold

7SR224 Argus Performance Specification
2.15 67/67G/67SEF Directional Overcurrent & Earth Fault
2.15.1 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)
Vs
Setting (V0) 0.33, 0.5, 1.0 … 67V
2.15.2 Operate Angle
Attribute Value
CA
Characteristic angle (I with respect
to V)
θ
s
, ± 5 °
forward
CA - 85 ° ± 5 ° to CA + 85° ± 5 °
Operating angle
reverse
(CA - 180°) - 85° ± 5 ° to (CA - 180°) + 85° ± 5 °
forward
CA – 87.5 ° ± 2.5 ° to CA + 87.5° ± 2.5 °
Operating angle
for SEF
elements with
Compensated
Networks
Enabled
reverse
(CA - 180°) – 87.5° ± 2.5 ° to (CA - 180°) + 87.5° ± 2.5 °
10°C to +55°C
± 5 °
Variation in
characteristic
angle
f
nom
- 3 Hz to f
nom
+ 2 Hz
± 5 °
2.15.3 Operate Threshold
Attribute Value
I (p/f) > 5 % In
I (e/f) > 0.5 % In
V (p/f) > 1 V
Minimum levels for
operation
V (e/f) > 1 V
2.15.4 Minimum Polarising Voltage Level
Parameter Value
Vs
Setting (V0)
100 % Vs, ± 2 % or ± 0.5 V
2.15.5 Operate and Reset Time
Attribute Value
Operate time typically 32 < 40 ms at characteristic angle
Reset time typically < 65 ms at characteristic angle
©2010 Siemens Protection Devices Limited Chapter 3 Page 39 of 49