Settings Example
When a CT fails, the current levels seen by the protection become unbalanced, however this condition would
also occur during a system fault.
Following a CT failure, if 1 or 2 of the 3 phases falls below the CT supervision setting the element will operate
subject to a time delay to prevent operation for transitory effects.
Operation of other protection function elements can be inhibited using output logic signals, however opera-
tion of the 60CTS-I function may not inhibit high speed protection functionality. User settings are to be consid-
ered.
A 3-phase CT failure is considered so unlikely (these being independent units) that this condition is not tested
for.
Settings Menu
Functions > Function Config
Parameter Range Settings
Default Gn1 Gn2 Gn3 Gn4
60CTS CT Supervision Enabled
Disabled
Disabled
Functions > Supervision > 60CTS > 60CTS-I
Parameter Range Settings
Default Gn1 Gn2 Gn3 Gn4
Element Enabled
Disabled
Disabled
Setting 0.05 to 2 ⋅ I
rated
, Δ 0.05 ⋅ I
rated
0.05 ⋅
I
rated
Delay (DTL) 0.03 to 20 s Δ 0.01 s
20 to 100 s Δ 0.1 s
100 to 1000 s Δ 1 s
1000 to 10000 s Δ 10 s
10000 to 14400 s Δ 100 s
10 s
Functions > Supervision > 60CTS > 60CTS-I
Parameter Range Settings
Default Gn1 Gn2 Gn3 Gn4
Element Enabled
Disabled
Disabled
Inps 0.05 to 1 ⋅ I
rated
, Δ 0.05 ⋅ I
rated
0.1 ⋅
I
rated
Vnps 7 to 110 V, Δ 1 V 10 V
Delay (DTL) 0.03 to 20 s Δ 0.01 s
20 to 100 s Δ 0.1 s
100 to 1000 s Δ 1 s
1000 to 10000 s Δ 10 s
10000 to 14400 s Δ 100 s
10 s
6.2.5
Supervision Functions
6.2 60CTS CT Supervision
Reyrolle 7SR5, Overcurrent Protection Device, Device Manual 377
C53000-G7040-C014-1, Edition 11.2019
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