Siemens UL 489 - Page 180

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These data can be shown on the display of the trip units, transmitted to the PROFIBUS DP via the COM15 module or to the Modbus RTU
via the COM16 module and transferred to the outputs of external
cmodules. Based on these data, conclusions can be drawn
about the condition of the power system.
Measured parameter Range Accuracy
1)
Currents I
L1
, I
L2
, I
L3
, I
N
30 - 8000 A ± 1 % of measurement range
Ground current measured per GF mode setting 
(residual or direct sense).
100 - 1200 ± 5 % of measurement range
Line-to-line voltages U
L12
, U
L23
, U
L31
15 - 130 V
130 - 1150 V
± 5 % of read value
± 1 % of measurement range
Line-to-neutral-line voltages U
L1N
, U
L2N
, U
L3N
10 - 75 V
75 - 700 V
± 5 % of read value
± 1 % of measurement range
Average line-to-line voltages U
avgD
15 - 130 V
130 - 1150 V
± 5 % of read value
± 1 % of measurement range
Average line-to-neutral-line voltages U
avgY
10 - 75 V
75 - 700 V
± 5 % of read value
± 1 % of measurement range
Apparent power S
L1
, S
L2
, S
L3
13 - 8000 kVA ± 2 % of measurement range
± 2 % vom Messbereich
Total apparent power 13 - 24000 kVA ± 2 % of measurement range
Active power P
L1
, P
L2
, P
L3
-8000 - +8000 kW
± 2 % of apparent power (P. F. > 0.6)
Total active power -24000 - +24000 kW
± 2 % of apparent power (P. F. > 0,6)
Reactive power Q
L1
, Q
L2
, Q
L3
-6400 - +6400 kVar ± 4 % of apparent power
Total reactive power -20000 - +20000 kVar ± 4 % of apparent power
Power factors cos
L1
, cos 
L2
, cos 
L3
,
-0,6 - 1 - +0.6
-0.6 - 1 - +0,6
± 0.04
± 0,04
Power factor total -0.6 - 1 - +0.6
-0,6 - 1 - +0,6
± 0.04
± 0,04
Ampere demand per phase of currents I
L1
, I
L2
, I
L3
30 - 8000 A ± 1 % of measurement range
3-phase ampere demand 30 - 8000 A ± 1 % of measurement range
Active power demand per phase in L
1
, L
2
, L
3
13 - 8000 kW ± 2 % of apparent power (P. F. > 0.6)
3-phase active power demand 13 - 8000 kW ± 2 % of measurement range
Apparent power demand per phase in L
1
, L
2
, L
3
13 - 8000 kVA ± 2 % of measurement range
3-phase apparent power demand 13 - 8000 kVA ± 2 % of measurement range
3-phase reactive power demand -8000 - +8000 kVar ± 4 % of apparent power
Active energy in the normal direction 1 - 10000 MWh ± 2 %
Active energy in the reverse direction 1 - 10000 MWh ± 2 %
Reactive energy in the normal direction 1 - 10000 MVarh ± 2 %
Reactive energy in the reverse direction 1 - 10000 MVarh ± 2 %
Frequency 15 - 40 Hz
40 - 70 Hz
70 - 440 Hz
± 0.1 Hz
± 0,1 Hz
Total harmonic distortion of current and voltage 2 - 100 %
± 2 % of measurement range up to 29
th
harmonic
Phase unbalance of current and voltage
2)
2 - 150 % ± 1 % of displayed value
1)
The given measured value tolerances are valid for one year based on an average operating temperature of 25 °C. After this period, deviations may occur.
The given tolerances for measured values for which the measured voltage is consumed when being determined are only valid if the voltage measurement
is carried out with an accuracy of 0.5
%.
2)
ANSI definition: Ratio of the largest difference between the phases and the average of all 3 phases.