Page 79 - MCCB-XT5

P. 79

ABB | SACE Tmax XT

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 33).
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
Enable: Activates the protection and availability of the threshold OFF
in the menu
Threshold 1 I1
Threshold: The value is given in percentage of threshold I1 and 50 % I1
can be set within the range: 50% I1 to 100% I1, in 1% steps.
Enable: Activates the protection and availability of the threshold OFF
in the menu
Threshold 2 I1
Threshold: The value is given in percentage of threshold I1 and 75 % I1
can be set within the range: 50% I1 to 100% I1, in 1% steps.
Enable: Activates the protection and availability of the threshold OFF
in the menu
Direction: allows the user to choose whether to have the signal
when the current is higher (Up) or lower (Down) than the Down
Threshold Iw1
threshold.
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 3 In
In, in 0.01 In steps
Enable: Activates the protection and availability of the threshold OFF
in the menu
Direction: allows the user to choose whether to have the signal
when the current is higher (Up) or lower (Down) than the Up
Threshold Iw2
threshold.
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 3 In
In, in 0.01 In steps

Figure 33

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