67/67G/67Sef Directional Overcurrent & Earth Fault; Reference; Operate Angle; Operate Threshold - Siemens 7SR224 Technical Manual

2.15 67/67G/67SEF Directional Overcurrent & Earth Fault

2.15.1 Reference

Parameter
θ Angle setting
s
I Applied current
V Applied voltage
Vs Setting (V0)

2.15.2 Operate Angle

Attribute
Characteristic angle (I with respect
CA
to V)
forward
Operating angle
reverse
Operating angle
forward
for SEF
elements with
Compensated
reverse
Networks
Enabled
Variation in 10°C to +55°C
characteristic
angle
f
nom

2.15.3 Operate Threshold

Attribute
Minimum levels for
operation

2.15.4 Minimum Polarising Voltage Level

Parameter
Vs Setting (V0)

2.15.5 Operate and Reset Time

Attribute
Operate time
Reset time
©2010 Siemens Protection Devices Limited
Value
-95...+95 °
In
110 V phase-phase (63.5 V phase-earth)
0.33, 0.5, 1.0 ... 67V
Value
, ± 5 °
θ
s
CA - 85 ° ± 5 ° to CA + 85° ± 5 °
(CA - 180°) - 85° ± 5 ° to (CA - 180°) + 85° ± 5 °
CA – 87.5 ° ± 2.5 ° to CA + 87.5° ± 2.5 °
(CA - 180°) – 87.5° ± 2.5 ° to (CA - 180°) + 87.5° ± 2.5 °
± 5 °
± 5 °
- 3 Hz to f + 2 Hz
nom
Value
I (p/f) > 5 % In
I (e/f) > 0.5 % In
V (p/f) > 1 V
V (e/f) > 1 V
Value
100 % Vs, ± 2 % or ± 0.5 V
Value
typically 32 < 40 ms at characteristic angle
typically < 65 ms at characteristic angle
7SR224 Argus Performance Specification
Chapter 3 Page 39 of 49