7SR11 & 7SR12 Performance Specification
©2017 Siemens Protection Devices Limited Chapter 3 Page 43 of 56
2.16 51V Voltage Controlled Overcurrent
2.16.1 Reference
Parameter Value
Vs
Setting 60V
m
multiplier 0.5
Is
Setting 1xIn
2.16.2 Operate and Reset Level
Attribute Value
V
op
Operate level
100 % Vs, ± 1 % or ± 0.25V
Reset level
≤ 105 % V
op
Repeatability
± 1 %
Variation
-10 °C to +55 °C
≤ 5 %
f
nom
± 5 %
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
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