60Cts Current Transformer Supervision; Reference; Current & Voltage Threshold; Operate And Reset Time - Siemens 7SR224 Technical Manual

3.3

60CTS Current Transformer Supervision

3.3.1

Reference

Parameter
Current Threshold
I
thresh
V Voltage Threshold
thresh
t Delay setting
d
3.3.2 Current & Voltage Threshold
Attribute
I CT failed current level
op
Reset level
CT failed voltage level
V
op
Reset level
Repeatability
-10 °C to +55 °C
Variation
f
nom
harmonics to f
3.3.3

Operate and Reset Time

Attribute
t Basic operate time
basic
Operate time
Repeatability
©2010 Siemens Protection Devices Limited
Value
0.05, 0.1... 1 xIn
7, 8... 110V
0.00, 0.01...20.00, 20.50... 100, 101... 1000, 1010...
10000, 10100... 14400 s
Value
100 % I
90 % I
100 % V
110 % V
± 1 %
≤ 5 %
- 3 Hz to f + 2 Hz
nom
≤ 5 %
cutoff
Value
30 ms ± 20ms
, ± 1 % or ± 20ms
t
basic
± 1 % or ± 20ms
7SR224 Argus Performance Specification
, ± 5% or ± 1% In
thresh
± 5% or ± 1% In
op,
, ± 2% or ± 0.5V
thresh
, ± 2 % or ± 0.5V
op
Chapter 3 Page 43 of 49