ABB SACE Tmax XT2 - Page 177

1SDH002031A1002 ECN000092998 Rev. B SACE Tmax XT2 – XT4 | 177
Enabling and
measurements
On the Ekip Signalling 3T page, it is possible to enable the individual inputs of the modules:
PT1000 1, PT1000 2, PT1000 3 and 4-20mA current loop.
Parameter
Description
Default
Enable
It enables the specific input and the relative checks of alarm
statuses and messages to be checked.
Enabled
The page also shows the status alarms and measurements detected for each input.
Alarm signals
On the page Protection Parameters - Other parameters A (and B, if the dual set is activated) it is
possible to activate and configure up to three alarm thresholds for each inputs, which are
independent of one another: THR 1, THR2, TH3.
Each alarm threshold provides the following configuration parameters:
NOTE: the table shows the threshold 1 parameters of the input PT1000 1; for all the
other thresholds and inputs, the names and the references to be considered change
Parameter
Description
Default
PT1000 1 THR 1
Protection
Activates the PT1000 1 input test with alarm threshold THR
1
Disabled
PT1000 1 THR 1
Config
Defines whether the alarm is triggered by the measured
value exceeding (up) or falling below (down) the set THR 1
threshold.
Down
PT1000 1 THR 1
Alarm threshold THR 1 of the PT1000 1 input.
The value is expressed in degrees Celsius (°C), which are
settable in a range: -40 °C .. 240 °C with 0.1 °C step.
NOTE: the Current Loop 4-20mA input
thresholds are expressed as a percentage
settable in a range: 0 % - 100 % with 0.1 % step
(each step equivalent to 0.016  A)
200 °C
(PT1000) /
50 %
(4-20mA)
PT1000 1 THR 1
hysteresis
Hysteresis value valid for leaving the alarm condition if the
set alarm threshold THR 1 is exceeded.
The hysteresis parameter permits only positive values, the
trip unit decides whether to add or subtract this value to the
alarm threshold on the basis of the ConFigure parameter.
For example:
 Config= Up, THR 1= 200 °C, hysteresis= 10 °C the
alarm is activated when 200 ° C is exceeded and is
deactivated when it falls below 190 ° C
The value is expressed in degrees Celsius (°C), which are
settable in a range: 0 °C - 50 °C with 0.1 °C step.
NOTE: the thresholds combined with the 4-20mA
current loop input are expressed as a percentage
settable in a range: 0 % .. 30 % with 0.1 % step
(each step equivalent to 0.016  A)
1 °C
(PT1000) /
1 %
(4-20mA)
Statuses and
alarms
On the Warnings/Alarms page, the status of all the control thresholds can be checked.