Iskra MT440 - 6.2 Accuracy

Technicaldata
34 User’sManual
6.2 Accuracy
Total accuracy (measurements and analog output) according to IEC/EN 60 688 is presented as
percentage of range except when it is stated as an absolute value.
Measured values Range Accuracy class
Rms current (I
1
, I
2
, I
3
, Iavg, I
n
) Auto (1, 5, 10 A) 0.3 (0.2)*
Maximum current
12.5 A
0.3 (0.2)*
Rms phase voltage
(U
1
, U
2
, U
3
, Uavg)
Auto (62.5, 125, 250, 500 V
L-N
)
0.3 (0.2)*
Maximum voltage 600 V
L-N
0.3 (0.2)*
Rms phase-to-phase voltage
(U
12
, U
23
, U
31
, Uavg)
800 V
L-L
0.3 (0.2)*
Frequency (f) − actual 50 / 60Hz
10 mHz (2 mHz)*
Nominal frequency range 16 … 400 Hz
10 mHz
Power angle (φ) −180 … 0 … 180°
0.2°
Power factor (PF)
−1 … 0 … +1
U = 50 … 120 % U
n
I = 2 % … 20 % I
n
I = 20 % … 200 % I
n
0.5
0.2
THD
5…500 V
0…400 %
0.5
Active power
75
120
250
500
[W/var/VA]
I
n
= 1 A
375
600
1250
2500
[W/var/VA]
I
n
= 5 A
0.5 (0.3)*
Reactive power 0.5 (0.3)*
Apparent power 0.5 (0.3)*
Active energy Class 1 (EN 62053-21)
Reactive energy Class 2 (EN 62053-23)
Note
* − Accuracy on communication