MI 2792 PowerQ4 Plus
Recording Practice and Instrument Connection
90
Instrument should be connected to the network according to figure bellow.
LN L3 C
B
A
L1
L1
L3C
N
A
L2
L2
B
Figure 4.8: 1-phase 3-wire system
Note:
In case of events capturing, it is recommended to connect unused voltage inputs
to N voltage input.
4.2.2 Connection to the MV or HV Power System
In systems where voltage is measured at the secondary side of a voltage transformer
(say 11 kV / 110 V), the instrument voltage range should be set to 50÷110 V and scaling
factor of that voltage transformer ratio has to be entered in order to ensure correct
measurement. In the next figure settings for this particular example is shown.
Figure 4.9: Voltage ratio for 11kV/110kV transformer example
Instrument should be connected to the network according to figure bellow.