Application and Setting Notes
Parameter: Gn 60CTS-I Element
•
Default setting: Disabled
This setting is used to allow the element to be switched on and off if it is not required.
Parameter Value Description
Disabled This element is off and is not available
Enabled The element is available for use and can be parame-
terized
Parameter: Gn 60CTS-I Setting
•
Default setting: 0.05 x I
n
(0.05 ⋅ I
rated
)
The current from each phase is monitored. If 1 or 2 of the 3 input currents falls below this setting the
60CTS Delay is initiated.
If all 3 input currents fall below the setting, CT failure is not raised.
Parameter: Gn 60CTS-I Delay
•
Default setting: 10 s
This is the delay applied to the 60CTS-I alarm output. This delay is used to prevent nuisance indications
which would otherwise occur during switching operations and system faults.
Parameter: Gn 60CTS-V Element
•
Default setting: Disabled
This setting is used to allow the element to be switched on and off if it is not required.
Parameter Value
Description
Disabled This element is off and is not available
Enabled The element is available for use and can be parame-
terized
Parameter: Gn 60CTS-V Inps
•
Default setting: 0.1 x I
n
(0.1 ⋅ I
rated
)
If the measured negative phase sequence current is above this threshold without corresponding NPS
voltage it could indicate that a CT failure has occurred. The 60CTS-V element will not operate unless this
threshold is exceeded.
Parameter: Gn 60CTS-V Vnps
•
Default setting: 10 V
If the negative phase sequence voltage is above this threshold this indicates a system fault and operation
of the 60CTS-V element is inhibited.
Parameter: Gn 60CTS-V Delay
•
Default setting: 10 s
This is the delay applied to the 60CTS-V alarm output. This delay is used to prevent nuisance indications
which would otherwise occur during switching operations and system faults.
6.2.4
Supervision Functions
6.2 60CTS CT Supervision
376 Reyrolle 7SR5, Overcurrent Protection Device, Device Manual
C53000-G7040-C014-1, Edition 11.2019
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