5
3.1.1
Monitored parameters
P
Power
P=S*cos(
φ
) [W]
IS
System current with sign
Q
Reactive power
Q=S*sin(
φ
) [var]
PF
Power factor
PF=P/S
S
Apparent power
S=rot(3)*Uh*Ih [VA]
QF
Reactive power factor
QF=Q/S
U
Voltage
LF
= sign(Q)*(1-|PF|)
I
Current
PA
Phase angle
F
Frequency
3.2
Input settings
Read configuration:
Read present settings
from LQT400 to ConfigLQT.
Apply configuration:
Save data to LQT400.
Configuration using:
choose which values will
be shown.
•
Primary values
–
values based on
primary data.
•
Secondary values
–
values based on
secondary values.
Primary:
U: V, kV, MV
I: A, kA
Name of measuring point
Free text
–
20 characters
System connection:
For more information see
page 6.
Transformer ratio
