Siemens 7SR224 - Voltage Controlled Overcurrent; Reference; Operate and Reset Level

7SR224 Argus Performance Specification
2.12 51V Voltage Controlled Overcurrent
2.12.1 Reference
Parameter Value
Vs
Setting 60V
m
multiplier 0.5
Is
Setting 1xIn
2.12.2 Operate and Reset Level
Attribute Value
V
op
Operate level
100 % Vs, ± 1 % or ± 0.25V
Reset level
≤ 105 % V
op
Repeatability
± 1 %
-10 °C to +55 °C
≤ 5 %
Variation
f
nom
- 3 Hz
to f
nom
+ 2 Hz
harmonics to f
cutoff
≤ 5 %
Operate and Reset Time
As per Phase Fault Shaped Characteristic Element (ANSI 51).
Where Pickup Level = Is for Voltage > Vs
Pickup Level = (Is x m) for Voltage < Vs
©2010 Siemens Protection Devices Limited Chapter 3 Page 35 of 49