60Cts & 60Cts-I Current Transformer Supervision; Reference; Current & Voltage Threshold; Operate And Reset Time - Siemens 7SR12 Argus Manual

7SR11 & 7SR12 Performance Specification
3.3 60CTS & 60CTS-I Current Transformer Supervision

Reference

3.3.1
Parameter
I Current Threshold
thresh
Applied Current
I
(for operate time)
t Delay setting
d
V Voltage Threshold
thresh
Current & Voltage Threshold
3.3.2
Attribute
I CT failed current level
op
Reset level
V
CT failed voltage level
op
Reset level
Repeatability
Variation

Operate and Reset Time

3.3.3
Attribute
t Basic operate time
basic
Operate time
Repeatability
©2017 Siemens Protection Devices Limited
Directional Relays have additional VT settings
-10 °C to +55 °C
f ± 5 %
nom
harmonics to f
cutoff
Value
0.05, 0.1... 2 xIn
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... 110V
Value
, ± 5% or ± 1% In
100 % I
thresh
± 5% or ± 1% In
90 % I
op,
, ± 2% or ± 0.5V
100 % V
thresh
, ± 2 % or ± 0.5V
110 % V
op
± 1 %
≤ 5 %
≤ 5 %
Value
50 ms ± 20ms
, ± 1 % or ± 20ms
t + t
d basic
± 1 % or ± 20ms
thresh
Chapter 3 Page 54 of 56