ABB RELION REX640 - 9.10.5.9 Pulse control

B
U
U
d
BW
=
( / )2
(Equation 384)
U
d
|U
m
– U
p
|, differential voltage
U
BW
Setting parameter Band width voltage
t
T
B
=
−
( )
2
1
(Equation 385)
T T1 or T2
The monitored data UD_CTL shows the differential voltage value U
m
– U
p
. If the
value exceeds half of the Band width voltage setting and has a negative sign, a
raising pulse is issued. The UD_CTL monitored data can also be seen in the DT timer
mode.
The hysteresis approach is presented in Figure 916 .
Figure 920: Inverse time characteristic for different values on T1 or T2 (The smaller
figure is a zoom-in of the larger one)
9.10.5.9 Pulse control
The tap changer generates an active operating signal when the tap-changing
process is active. This signal is used for alarming purposes and must be connected
1MRS759142 F
Control functions
REX640
Technical Manual
1715