ABB SACE Tmax XT7 - 16 - Logic Selectivity; Presentation of Logic Selectivity

ABB | SACE Tmax XT
Protections | 15 - Additional protections and functions83 | © 2020 ABB | 1SDH001821A1002 - ECN000135670
Current thresholds
Function
The Current thresholds allow checks to be set along the current lines, to be associated with the programmable
contacts of the Ekip Signalling modules (in all versions).
Two pairs of programmable contacts are available:
• Threshold 1 I1 and Threshold 2 I1, with control relating to I1
• Threshold Iw1 and Threshold Iw2, with control relating to In
The thresholds can be enabled and set in the Advanced - Signaling menu (page 35).
IMPORTANT:
• the current thresholds do not handle the trip, just the signal
• the function is activated if the trip unit is powered by auxiliary voltage
Parameters
Threshold Available parameters Default
Threshold 1 I1
Enable: Activates the protection and availability of the threshold in the
menu
OFF
Threshold: The value is given in percentage of threshold I1 and can be
set within the range: 50% I1 to 100% I1, in 1% steps.
50 % I1
Threshold 2 I1
Enable: Activates the protection and availability of the threshold in the
menu
OFF
Threshold: The value is given in percentage of threshold I1 and can be
set within the range: 50% I1 to 100% I1, in 1% steps.
75 % I1
Threshold Iw1
Enable: Activates the protection and availability of the threshold in the
menu
OFF
Direction: allows the user to choose whether to have the signal when
the current is higher (Up) or lower (Down) than the threshold.
Down
Threshold: The value is given as both absolute value (Amperes) and
relative value (In) and can be set within the range: 0.1 In to 10 In, in
0.01 In steps
3 In
Threshold Iw2
Enable: Activates the protection and availability of the threshold in the
menu
OFF
Direction: allows the user to choose whether to have the signal when
the current is higher (Up) or lower (Down) than the threshold.
Up
Threshold: The value is given as both absolute value (Amperes) and
relative value (In) and can be set within the range: 0.1 In to 10 In, in
0.01 In steps
3 In
Figure 33