Page 29 - Sace Emax 2 Manual for design engineers

ABB | SACE Emax 2
2 - Measurements

List Ekip Dip is able to take various measurements, all available via Ekip Connect::
Parameter Description
Instantaneous currents Phase current and earth fault measurements in real time
Trip List of current protection trips (TRIP)
Min Max Measurements History of minimum and maximum currents, recorded at a settable interval
Operation counters Number of mechanical and electrical operations

All information are available via the Ekip T&P module and via Ekip Connect software; instantaneous
measurements are also available via the Ekip Multimeter unit.

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 measurement time and performance
depend on the rated current defined by the Rating plug (In):
Monitor time Normal Accuracy of
Measurement
(min-max) operating range value read (1)
Phase currents 0,004...64 In 0,2...1,2 In 1 %
Internal earth fault currents (2) 0,08...64 In 0,2...1,2 In 2 %

(1) the accuracies refer to normal operating ranges, as established by IEC 61557-12
(2) available with LSIG versions

Maximum and minimum The trip unit is able to record the maximum and minimum current, measured inside an interval that can be
currents programmed by the user.
Every measurement recorded is accompanied by the following information:
• Recording interval.
• Phase and value of maximum and minimum current measured.
• Date and time of the recording (referring to the internal clock).
NOTE: in the case of the minimum current, if the value drops below the 0.03 In threshold, it
will be recorded and represented by the symbol “…” in the measurement field.

Trips The trip unit is able to record the last 30 openings of the circuit-breaker caused by protection functions (trips).
The trips include useful information:
• The protection that caused the trip
• The progressive number of the opening
• The date and time of the opening (referring to the internal clock)
• The measurements associated to the trip protection.

Contact Wear Contact wear indicates the state of deterioration of the main contacts of the circuit-breaker.
The value is expressed as a percentage, and is 0 % in the case of no wear, and 100 % in the case of total
wear.
The contact wear is calculated automatically by the trip unit at every opening for protection or, in the presence
of an auxiliary power supply, also at every manual opening of the circuit-breaker.

Number of operations In the presence of auxiliary power, the trip unit records a series information relating to the openings of the
circuit-breaker:
• Number of manual operations
• Total number of operations (manual + trips)

27 | © 2020 ABB | 1SDH001330R1002 - ECN000134959 - Rev. A Ekip Dip | 2 - Measurements