Operate And Reset Time; 60Cts & 60Cts-I Current Transformer Supervision; Reference; Current & Voltage Threshold - Siemens 7SR10 Argus Series Manual

3.3 60CTS & 60CTS-I Current Transformer Supervision
3.3.1

Reference

Parameter
I Current Threshold
thresh
Applied Current
I
(for operate time)
t Delay setting
d
V Voltage Threshold
thresh
3.3.2 Current & Voltage Threshold
Attribute
I CT failed current level
op
Reset level
V CT failed voltage level
op
Reset level
Repeatability
Variation
3.3.3

Operate and Reset Time

Attribute
t Basic operate time
basic
Operate time
Repeatability
© 2018 Siemens Protection Devices Limited
Directional Relays have additional VT settings
-10 °C to +60 °C
f ± 5 %
nom
harmonics to f
cutoff
Value
0.05, 0.1... 2xI
Healthy CT
5 x I
Phases
Failed CT phase 0
0.3, 20.00, 20.50... 100, 101...
1000, 1010... 10000, 10100...
14400 s
7, 8... 110 V
Value
100 % I , ± 5 % or ± 1% I
thresh
90 % I ± 5 % or ± 1% I
op,
100 % V , ± 2 % or ± 0.5 V
thresh
110 % V , ± 2 % or ± 0.5 V
op
± 1 %
≤ 5 %
≤ 5 %
Value
50 ms ± 20 ms
t + t , ± 1 % or ± 20 ms
d basic
± 1 % or ± 20 ms
7SR10 Performance Specification
n
thresh
n
n
Chapter 3 Page 49 of 52