ABB | SACE Tmax XT
126 | © 2019 ABB | 1SDH002039A1002 - ECN000093027 - Rev. A
Additional functions | 3 - IPS Interface protections
VS Warning
A warning signal is activated if all three of the line-to-line voltages measured by the Trip unit are within the
window defined by the control thresholds for the set time.
The
Protections-Advanced-Warnings
menu includes the control threshold submenu in which the parameters
can be entered:
Parameter
Description
Default
Enable
Activates/deactivates monitoring of the parameters and their availability in
the menu
Off
Signal source
Establishes whether the line-to-line voltages to be checked are those from
the internal sockets (Measuring) or from Ekip Synchrocheck, if present.
NOTE
:
if Ekip Synchrocheck is set, monitoring will refer to one single
voltage
Meas.
Threshold
DOWN
Establishes the lower limit value of the control band, given as both absolute
value (Volts) and relative value (Un), which can be set within the range: 0.5
Un to 1 Un in 0.001 Un steps
0,9 Un
Threshold UP
Establishes the upper limit value of the control band, given as both absolute
value (Volts) and relative value (Un), which can be set within the range: 1 Un
to 1.5 Un, in 0.001 Un steps
1,1 Un
Time
This is the monitoring time that activates the signal; the value is given in
seconds and can be set within a range: 0.1 s to 900 s, in 0.1 s steps
30 s
FS Warning
A warning signal is activated if the frequency measured by the Trip unit is within the window defined by the
control thresholds for the set time.
The
Protections-Advanced-Warnings
menu includes the control threshold submenu in which the parameters
can be entered:
Parameter
Description
Default
Enable
Activates/deactivates monitoring of the parameters and their availability in
the menu
Off
Signal source
Establishes whether the line-to-line voltages to be checked are those from
the internal sockets (Measuring) or from Ekip Synchrocheck, if present.
NOTE
:
if Ekip Synchrocheck is set, monitoring will refer to one single
voltage
Meas.
Threshold
DOWN
Establishes the lower limit value of the control band, given as both absolute
value (Hertz) and relative value (Fn), which can be set within the range: 0.9
Fn to 1 Fn in 0.001 Fn steps
0,998 Fn
Threshold UP
Establishes the lower limit value of the control band, given as both absolute
value (Hertz) and relative value (Fn), which can be set within the range: 1 Fn
to 1.1 Fn in 0.001 Fn steps
1,002 Fn
Time
This is the monitoring time that activates the signal; the value is given in
seconds and can be set within the range: 0.1 s to 900 s, in 0.1 s steps
30 s
F W1 Warning
If the frequency measured by the Trip unit exceeds or falls below the threshold (depending on the direction
set), the corresponding alarm will be activated (no TRIP).
The
Protections-Advanced-Warnings-F W Warnings
menu includes the control threshold submenu in which
the parameters can be entered:
Parameter
Description
Default
Enable
Activates/deactivates the control threshold of the parameters and their
availability in the menu
Off
Direction
Defines whether frequency monitoring is performed after the measured
sequence has dropped (Down) or been exceeded (Up)
Down
Threshold
Establishes the value that activates the alarm.
The value is given as both absolute value (Hertz) and relative value (Fn) and
can be set within the range: 0.9 Fn to 1.1 Fn in 0.001 Fn steps
3 Fn
