ABB | SACE Tmax XT
182 | © 2020 ABB | 1SDH001821A1002 - ECN000135670
External electronic accessories | 13 - Ekip Signalling 3T
Alarm signals
Up to three alarm thresholds (independent of each other), Threshold A, Threshold B, Threshold C, can be
activated and configured for each input in the
Protection parameters
-
Other parameters A
(and B if dual set
is activated) page
Each alarm threshold has the following configuration parameters:
NOTE:
the table lists the parameters of threshold A of input I42; the names and references
of all the other thresholds and inputs change
Parameter
Description
Default
Threshold A enable
Activates verification of input I42 with alarm Threshold A
Off
Threshold A
hysteresis direction
Defines whether the alarm must activate when measurement is above
(
Up
) or below (
Down
) the set value, with reference to the Threshold A
setting
Up
Threshold A value
Alarm threshold A of input I42. The value is given in degrees Celsius
(°C) and can be set within the range: -40°C to 240°C, in 0.1°C steps.
NOTE
: the thresholds of the 4-20mA (I41 and I51) Current Loop
input are given in percentage form and can be set within the
range: 0% to 100 %, in 0.1% steps (each step equivalent to
0.016µA)
200 °C (I42,
I43, I44,
I52, I53,
I54) / 50 %
(I41, I51)
Threshold A
hysteresis
Hysteresis value, valid for quitting the alarm condition if the set Treshold
A alarm threshold has been exceeded.
The hysteresis parameter only allows positive values. The trip unit
decides whether to add or subtract this value to or from the alarm
threshold on the basis of the direction parameter, example:
•
Direction
= Up,
Value
= 200°C,
hysteresis
= 10°C, the alarm activates
over 200° and de-activates below 190°C
The value is expressed in degrees Celsius (°C) and can be set within
the range: 0°C to 50°C with 0.1°C steps.
NOTE
: the thresholds associated with the 4-20mA (I41 and I51)
Current Loop input are given in percentage form and can be set
within the range 0% to 30 %, in 0.1% steps (each step equivalent
to 0.016µA)
1 °C (I42,
I43, I44,
I52, I53,
I54) / 1 %
(I41, I51)
States and alarms
The state of all control thresholds can be checked in the
Warnings
/
Alarms
page
