ABB | SACE Tmax XT
Measurements | 1 - Standard Measurements
97 | © 2019 ABB | 1SDH002039A1002 - ECN000093027 - Rev. A
Measurements
1 - Standard Measurements
List
The Standard measurements are:
Parameter
Description
Page
Instantaneous currents
Phase current measurements in real time
Events
List of events, status changes, alarms, recorded by the
Trip unit
Trip
List of current protection trips (TRIP)
Min-Max measurements
History of minimum and maximum currents, recorded at
a settable interval
Maintenance
CB status: contact wear and last maintenance
Operation counters
Number of mechanical and electrical operations
Instantaneous currents
The instantaneous currents, available in the
Measurements
pages, are real time measurements of the phase
and earth fault currents expressed in root mean square value; the monitor time and performance depend on
the rated current defined by the
Rating plug
(In):
Measurement
Monitor time
(min-max)
Normal operating
range
Accuracy of
value read
(1)
Phase currents
(4)
0,03 ÷ 64 In
0,2 ÷ 1,2 In
1%
(3)
Internal earth fault current
2
0,08 ÷ 64 In
0,2 ÷ 1,2 In
2 %
(3)
(1)
the accuracies refer to normal operating ranges, as established by IEC 61557-12
(2)
available with LSIG versions
(3)
accuracies based on Ekip Touch and Ekip Touch Measuring without Class 1 Power & Energy Metering
package; if the Class 1 Power & Energy Metering package is present and for all other trip unit models, check
the indicated performance values from page 104
(4)
the higher phase currents are also available in the Histograms, Measuring instruments and Measurement
summary pages
Special representations
Type of measurement
Measurement < min
value
Measurement < max
value
“_ _ _” displayed:
(not available) due to
Internal earth fault and
phase currents
. . . .
> [64 In]
Sensors disconnected
