Table. 5.4.9. - 98. Analogic magnitudes used by the OV function.
Signal
Description
Time base
U
L12
RMS
Fundamental RMS measurement of voltage U
L12
/V
5 ms
U
L23
RMS
Fundamental RMS measurement of voltage U
L23
/V
5 ms
U
L31
RMS
Fundamental RMS measurement of voltage U
L31
/V
5 ms
U
L1
RMS
Fundamental RMS measurement of voltage U
L1
/V
5 ms
U
L2
RMS
Fundamental RMS measurement of voltage U
L2
/V
5 ms
U
L3
RMS
Fundamental RMS measurement of voltage U
L3
/V
5 ms
Table. 5.4.9. - 99. Measured magnitude selection setting.
Name
Description
Range
Step Default
Measured
magnitude
Selection of P-P or P-E voltages. Additionally U3 or U4 input can be
assigned as the voltage channel to be supervised.
0: P-P
Voltages
1: P-E
Voltages
2: U3Input
(2LL-U3SS)
3: U4InputSS
-
0: P-P
Voltages
Selection of the used AI channel is made with a setting parameter. In all possible input channel
variations pre-fault condition is presented with 20 ms averaged history value from -20 ms of Start or
Trip event.
Figure. 5.4.9. - 47. Selectable measurement magnitudes with 3LN+U4 VT connection.
AQ-T257
Instruction manual
Version: 2.00
97
© Arcteq Relays Ltd