Page 116 - Sace Emax 2 Manual for design engineers

ABB | SACE Emax 2
2 - Ekip Measuring Measurements

List The Measuring measurements are
Condition Access Page
Instantaneous voltages Phase and line-to-line voltage measurements in real time 114
Real time measurements of the active, reactive, apparent
Instantaneous powers 114
phase and total powers
Instantaneous frequency Measurement of the line frequency 114
List of trips (TRIP) due to voltage, frequency, power
Trip 115
protections
History of minimum, maximum and mean voltages and
Min-Max-Med measurements 115
powers recorded within a settable range
Peak factor Real time measurement of the peak factor of the currents 115
Power factor Real time measurement of the power factor 115
Energy counters Measurement of active, reactive, apparent energy 115

The relative associated measurements are activated by means of the Ekip Synchrocheck module (page 223).

Instantaneous measurements Instantaneous currents, available in the Summary pages, are real time measurements of the line-to-line and
phase voltages expressed in root-mean-square value.
Representation, measuring range and performance depend on the set rated voltage (Un).
Available in the Summary pages, the instantaneous powers are real time measurements of the phase and
total active powers.
Representation, measuring range and performance depend on the set rated voltage (Un) and on the rated
current defined by the rated size of the Trip unit (In); in addition, the reference changes on the basis of the
type of measurement:
• Sn for total powers (Sn = In * Un * √3).
• Pn for phase powers (Pn = In * Un / √3).
NOTE: the phase powers and voltages are available with 4P and 3P + N CBs

Monitor time Normal Accuracy of
Measurement
(min-max) operating range value read (1)
Line-to-line voltages (6) 5 V ÷ 900 V (9) 100 ÷ 690 V 0.5 % (8)
Phase voltages 5 V ÷ 900 V (9) 50 ÷ 400 V 0.5 % (8)
Line frequency 30 ÷ 80 Hz (2) f -10 % ÷ f +10 % (4) 0,1 % (3)
Total active, reactive and |Pmin ÷ Pmax| (5) |0,3 ÷ 1,2 Sn| 2 % (3)
apparent power (7)
Active, reactive and (5) (3)
apparent phase power |Pmin ÷ Pmax| |0,3 ÷ 1,2 Pn| 2 %

(1) the accuracies refer to normal operating ranges, as established by IEC 61557-12
(2) available for voltage values of over 30 V (with Un < 277 V) or 60 V (with Un > 277 V)
(3) accuracies based on Ekip Touch 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 117
(4) 45 to 55 Hz with set frequency = 50 Hz; 54 to 66 Hz with f = 60 Hz
(5) Pmin = 0,5 In x 5 V; Pmax= 3 x 16 In x 900 V
(6) the higher line-to-line voltages are also available in the Histograms, Measuring instruments and Measurement
summary pages
(7) the higher total powers are also available in the Measuring instruments and Measurement summary pages
(8) without transformers; 0.7 % with class 0.2 external transformers
(9) without transformers; with transformers, multiply the min and max values for the transformer ratio between
primary and secondary voltages

Continued on the next page

114 | © 2020 ABB | 1SDH001330R1002 - ECN000134959 - Rev. A Ekip Touch - Measurements | 2 - Ekip Measuring Measurements