Siemens 7SR224 - 60 CTS Current Transformer Supervision; Reference; Current & Voltage Threshold; Operate and Reset Time

7SR224 Argus Performance Specification
3.3 60CTS Current Transformer Supervision
3.3.1 Reference
Parameter Value
I
thresh
Current Threshold 0.05, 0.1… 1 xIn
V
thresh
Voltage Threshold 7, 8… 110V
t
d
Delay setting
0.00, 0.01…20.00, 20.50… 100, 101… 1000, 1010…
10000, 10100… 14400 s
3.3.2 Current & Voltage Threshold
Attribute Value
I
op
CT failed current level
100 % I
thresh
, ± 5% or ± 1% In
Reset level
90 % I
op,
± 5% or ± 1% In
V
op
CT failed voltage level
100 % V
thresh
, ± 2% or ± 0.5V
Reset level
110 % V
op
, ± 2 % or ± 0.5V
Repeatability
± 1 %
-10 °C to +55 °C
≤ 5 %
Variation
f
nom
- 3 Hz to f
nom
+ 2 Hz
harmonics to f
cutoff
≤ 5 %
3.3.3 Operate and Reset Time
Attribute Value
t
basic
Basic operate time
30 ms ± 20ms
Operate time
t
basic
, ± 1 % or ± 20ms
Repeatability
± 1 % or ± 20ms
©2010 Siemens Protection Devices Limited Chapter 3 Page 43 of 49