Delay Time T1 - MR ECOTAP VPD CONTROL PRO Operating Instructions Manual

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76 ECOTAP VPD CONTROL PRO
Setting the bandwidth
To set the bandwidth, proceed as follows:
1. Go to Settings > Parameters > Control > Bandwidth.
2. Enter bandwidth.
3. Press the Accept button to save the modified parameter.

8.4.3 Delay time T1

Delay time T1 delays the issuing of a tap-change command for a defined pe-
riod. This prevents unnecessary tap-change operations if the tolerance
bandwidth is exited briefly.
Behavior only with delay time T1
If the measured voltage U
commands are issued to the motor-drive unit for the tap-change operation.
Control commands will also not be issued to the motor-drive unit if the mea-
sured voltage returns to the tolerance bandwidth
T1 . However, if the measured voltage deviates from the set bandwidth for
a long period
set delay time T1. The on-load tap-changer carries out a tap-change in a
raise or lower direction to return to the tolerance bandwidth.
Figure 57: Behavior of the regulation function with delay time T1
1 + B %: Upper limit
2 U : Desired value
desired
3 - B %: Lower limit
is within the set bandwidth
actual
, a tap-change command
5252433/02 EN
8 Operation
, no control
within the set delay time
occurs after expiration of the
4 Set delay time T1
5 U : Measured voltage
actual
6 B%: Tolerance bandwidth
Maschinenfabrik Reinhausen GmbH 2018