In order to save the energy of the internal battery, it is recommended to suppress
the unnecessary (in this case) one-minute back-up supply of the monitor before
each planned disconnection of measuring conductors from the supply voltage. This
shall be done by using the notebook with the started program of the PQ monitor
where the item Uspat shall be updated in menu Measuring instrument.
4. Technical data
4.1 Measurement of voltages
U
nom
of phase voltages U1, U2, U3, U4:
230 V
Range of measurement of phase voltages:
0 to 2 U
nom
Highest permissible phase voltage:
480 V
ef
Accuracy of voltage measurement:
± 0.1% of the measured value ± 0.1% U
nom
at 0.8 U
nom
to 1.2 U
nom
± 0.2% of the measured value ± 0.2% U
nom
outside 0.8 U
nom
to 1.2 U
nom
Resolution:
0.1% U
nom
or better
Temperature coefficient:
better than 0.2% U
nom
/10°C
4.2 Measurement of currents
Accuracy of measurement:
± 0.2% of the measured value and 0.2% I
nom
at 0.1 I
nom
to 1.2 I
nom
± 0.5% of the measured value at 1.2 I
nom
to 2 I
nom
Resolution:
0.1% I
nom
or better
Temperature coefficient:
better than 0.2% I
nom
/10°C
Highest permissible current loading:
5 × I
nom
during 1 s
Measuring string AMOS PQ - MEg30
I
nom
at shape coefficient K = 1.11:
30 A, 100 A, 300 A, 1000 A
Range of measurement:
0 to 1.2 I
nom
Accuracy of measurement:
0.1% I
nom
Linearity of measurement:
better than 0.5% I
nom
Change of the measured value with the
change of position:
1% I
nom
Measuring string MT PQ - MEg30
I
nom
at shape coefficient K = 1.11:
1 A, 5 A, 30 A, 150 A
10
PQ monitor – MEg30, MEg31, MEg32, MEg33
